Next: compose, Previous: event loop, Up: chez-a-sync reference
This (a-sync thread-pool) library file supplements the (a-sync event-loop) library file. (a-sync event-loop) provides asynchronous procedures which can wait on the completion of a task running in a worker thread or on an event loop running in another thread. However, sometimes it is better to run tasks in a thread pool rather than launching worker threads, particularly where the workload suits having the number of threads in the thread pool approximating to the number of local processors available to the program.
This (a-sync thread-pool) library file provides such a thread pool, together with two asynchronous procedures (await-task-in-thread-pool! and await-generator-in-thread-pool!) which can wait in an event loop for a task on the thread pool to complete and provide its result.
The thread pool objects provided by this library file do not make provision for rate limiting similar to that provided by the event loops in (a-sync event-loop). This is because there is no one-size-fits-all way of doing so. One common approach is, as in the case of the event loops provided by this library, to apply throttling to threads which add tasks by enforcing a wait in their thread of execution when the level of queued tasks reaches too high a level, so hindering their ability to add new ones. However this is counter productive where it is a task running on the thread pool which is adding the new tasks, particularly with a thread pool having only a few threads running in its pool. Another approach is to throw an exception when adding tasks which exceed a user-selectable level.
The best approach is for user code to provide its own rate limiting in cases where the way that that code is organised means that it could produce an excessive number of accumulating unexecuted tasks in the thread pool, possibly by applying delays when unexecuted tasks rise in number excessively, using timeouts with an event loop. This may be checked for by having code call the thread-pool-get-num-tasks procedure before adding a significant batch of new tasks in order to test queue size, and if necessary postpone adding the new tasks until the size of the already accumulated tasks has reduced.
This library file provides the following procedures:
This procedure constructs a thread pool object of native OS threads. The ’size’ argument specifies the number of threads which will run in the pool, and must be greater than 0. The ’non-blocking’ argument is optional and affects the operation of the thread-pool-stop! procedure. When set to #f, which is the default, that procedure will not return until all tasks previously added to the pool have completed. If set to #t, the thread-pool-stop! procedure will return immediately, before all tasks have finished.
The ’size’ and ’non-blocking’ settings may subsequently be altered by applying the thread-pool-change-size! or thread-pool-set-non-blocking! procedure to the pool.
Thread pool objects are usually best kept as top level objects, because threads in the pool will keep alive until thread-pool-stop! is called. If a thread pool is constructed within a local lexical scope, then either thread-pool-stop! must be applied to the pool before that scope is exited, or the last task added to the pool should itself apply thread-pool-stop! to the pool (which it can do if ’non-blocking’ is #t). Otherwise, the threads in the pool will remain alive uselessly in blocked condition until the program terminates, even though the pool may be inaccessible.
This procedure will throw an exception if a ’size’ argument of less than 1 is given, or if the system is unable to start the number of threads given as the ’size’ argument. If unable to start the number of threads so given, any threads which have in fact started in the pool will be killed.
This procedure is first available in version 0.16 of this library.
This procedure indicates whether ’obj’ is a thread pool object constructed by make-thread-pool.
This procedure is first available in version 0.16 of this library.
This procedure returns the number of tasks which the thread pool object is at present either running in the pool or has queued for execution. This procedure will not throw. It is also thread safe, although it accesses the task number field outside the pool mutex and therefore with relaxed memory ordering. That enables this procedure to be applied more efficiently for rate limiting purposes but the result might at any one time be marginally out of date.
This procedure is first available in version 0.16 of this library.
This procedure returns the current size setting for the thread pool (namely the number of threads that the pool runs).
This procedure is thread safe (any thread may call it).
This procedure is first available in version 0.16 of this library.
This procedure will increase, or if ’delta’ is negative reduce, the number of threads which the thread pool object will run by the value of ’delta’. This procedure does nothing if thread-pool-stop! has previously been called. This procedure is thread safe - any thread may call it.
One use for dynamic sizing of this kind is for a task to increment the thread number where it is about to enter a call which may block (non-asynchronously) for some time, with a view to decrementing it later when it has finished making blocking calls, so as to enable another thread to keep a core active. A with-thread-pool-increment macro is available which will do this for you automatically in an exception-safe way (see the documentation on that macro below).
Alternatively, this procedure can be used to reduce thread usage when a full set of threads is no longer required by the program.
If ’delta’ is positive, this procedure may raise an exception if the system is unable to start the required new threads. Because starting new threads can be time consuming, to minimize contention new threads are started outside the pool’s mutex, although internal book-keeping is done within the mutex. One consequence is that if such an exception is raised while another thread has concurrently tried to reduce the size of the pool, the size of the pool may be smaller than it was when this procedure was called. In certain circumstances, after an exception where no new threads can be started, the pool could have no running threads in it (so that thread-pool-get-size returns 0) even though some tasks previously added to the pool remain pending. If the system can start no new threads even though none are running in the pool, it will be significantly broken so it is not usually worth troubling about this - the program is doomed in that event whatever. However if that is wrong and the cause of the failure to start any threads can be addressed, then the thread pool can be brought back into use by calling this procedure again.
This procedure is first available in version 0.16 of this library.
This procedure returns the current non-blocking status of the thread pool. (See the documentation on the thread-pool-stop! procedure for more information about what that means.)
This procedure is thread safe (any thread may call it).
This procedure is first available in version 0.16 of this library.
This procedure sets the non-blocking status of the thread pool. If ’val’ is #f, the thread-pool-stop procedure will block, if #t it will not. (See the documentation on the thread-pool-stop! procedure for more information about this.)
This procedure is thread safe (any thread may call it).
This procedure will raise a &violation exception if it is invoked after the thread pool object concerned has been closed by a call to thread-pool-stop!.
This procedure is first available in version 0.16 of this library.
This procedure will cause the thread-pool object to stop running tasks. However, all tasks already running or queued for execution will be permitted to execute and complete normally. If the thread-pool’s non-blocking setting is set to #f, this procedure will wait until all the tasks still to execute have finished before returning, and if #t it will return straight away.
After this procedure has been called, any attempt to add further tasks with the thread-pool-add! procedure will fail, and that procedure will raise a &violation exception. The same exception will be raised if this procedure is applied to a thread pool to which this procedure has previously been applied.
This procedure is thread safe (any thread may call it) unless the non-blocking setting is #f, in which case no task running on the thread-pool object may call this procedure.
This procedure is first available in version 0.16 of this library.
This procedure adds a new task to the thread pool. ’task’ must be a thunk. If one or more threads in the pool are currently blocking and waiting for a task, then the task will begin executing immediately in one of the threads. If not, the task will be queued for execution as soon as a thread becomes available. Tasks will begin execution in the order in which they are added to the thread pool object. This procedure is thread safe (any thread may call it, including any task running on the thread pool object).
An optional handler procedure may be passed to ’fail-handler’ which will be invoked if the task raises an exception. If a task raises an exception and no handler procedure is provided, the program will terminate. The ’fail-handler’ procedure will be passed the condition object for the exception raised.
This procedure will raise a &violation exception if it is invoked after the thread pool object concerned has been closed by a call to thread-pool-stop!.
This procedure is first available in version 0.16 of this library.
This macro is intended to be called by a task running on a thread pool which is about to make a blocking (non-asynchronous) call. It will increment the number of threads in ’pool’ by 1 (by calling thread-pool-change-size!) so as to enable a queued task to keep a core active, and decrement it again when execution of the body clauses has completed.
The (i) increment, (ii) execution of body clauses, and (iii) decrement, form the three branches of a dynamic-wind, so the decrement automatically occurs if control leaves body execution because of an exception or other jump.
As this macro starts a new thread, it may raise an exception if the system is unable to start it. Starting a new thread is also not free of overhead and it may be worth profiling a prospective use case to see if running a few more threads in the thread pool than the number of processors in the system permanently, rather than changing it using this macro, and letting the OS’s scheduler handle the situation, is a better option.
This macro is first available in version 0.16 of this library.
The ’loop’ argument is optional. This procedure will run ’thunk’ in the thread pool specified by the ’pool’ argument. The result of executing ’thunk’ will then be posted to the event loop specified by the ’loop’ argument, or to the default event loop if no ’loop’ argument is provided or if #f is provided as the ’loop’ argument (pattern matching is used to detect the type of the third argument), and will comprise this procedure’s return value. This procedure is intended to be called within a waitable procedure invoked by a-sync (which supplies the ’await’ and ’resume’ arguments). It will normally be necessary to call event-loop-block! on ’loop’ (or on the default event loop) before invoking this procedure.
If the optional ’handler’ argument is provided, then that handler will run if ’thunk’ raises an exception, and the return value of the handler would become the return value of this procedure; otherwise the program will terminate if an unhandled exception propagates out of ’thunk’. ’handler’ should take a single argument, which will be the thrown condition object. Note that unlike a handler passed to the thread-pool-add! procedure, ’handler’ will run in the event loop thread and not in a thread pool thread. Exceptions raised by the handler procedure will propagate out of event-loop-run! for the ’loop’ event loop.
This procedure calls ’await’ and must (like the a-sync procedure) be called in the same thread as that in which the ’loop’ or default event loop runs (as the case may be).
This procedure calls event-post! in the ’loop’ or default event loop, which could be subject to throttling (see the documentation for the make-event-loop procedure for further information).
Exceptions may propagate out of this procedure if they arise while setting up, which shouldn’t happen unless the thread pool given by the ’pool’ argument has been closed (in which case a &violation exception will be raised) or memory is exhausted.
Here is an example of the use of await-task-in-thread-pool!:
(set-default-event-loop!) ;; if none has yet been set (let ([pool (make-thread-pool 4)]) (event-loop-block! #t) ;; because the task runs in another thread (a-sync (lambda (await resume) (format #t "1 + 1 is ~a\n" (await-task-in-thread-pool! await resume pool (lambda () (+ 1 1)))) (event-loop-block! #f)))) (event-loop-run!)
This procedure is first available in version 0.16 of this library.
The loop argument is optional. The ’generator’ argument is a procedure taking one argument, namely a yield argument (see the documentation on the make-iterator procedure for further details). This await-generator-in-thread-pool! procedure will cause ’generator’ to run as a task in the ’pool’ thread pool, and whenever ’generator’ yields a value this will cause ’proc’ to execute in the event loop specified by the ’loop’ argument, or in the default event loop if no ’loop’ argument is provided or if #f is provided as the ’loop’ argument. ’proc’ should be a procedure taking a single argument, namely the value yielded by the generator.
This procedure is intended to be called within a waitable procedure invoked by a-sync (which supplies the ’await’ and ’resume’ arguments). It will normally be necessary to call event-loop-block! on ’loop’ (or on the default event loop) before invoking this procedure.
If the optional ’handler’ argument is provided, then that handler will run if ’generator’ raises an exception; otherwise the program will terminate if an unhandled exception propagates out of ’generator’. ’handler’ should take a single argument, which will be the thrown condition object. Note that unlike a handler passed to the thread-pool-add! procedure, ’handler’ will run in the event loop thread and not in a thread pool thread. This procedure will return #f if the generator completes normally, or ’chez-a-sync-thread-error if the generator throws an exception and ’handler’ is run (the ’chez-a-sync-thread-error symbol is reserved to the implementation and should not be yielded by the generator). Exceptions thrown by the handler procedure will propagate out of event-loop-run! for the ’loop’ event loop.
This procedure calls ’await’ and will return when the generator has finished or, if ’handler’ is provided, upon the generator raising an exception. This procedure must (like the a-sync procedure) be called in the same thread as that in which the ’loop’ or default event loop runs (as the case may be).
This procedure calls event-post! in the ’loop’ or default event loop, which could be subject to throttling (see the documentation for the make-event-loop procedure for further information).
Exceptions may propagate out of this procedure if they arise while setting up, which shouldn’t happen unless the thread pool given by the ’pool’ argument has been closed (in which case an &violation exception will be raised) or memory is exhausted. Exceptions arising during the execution of ’proc’, if not caught locally, will propagate out of event-loop-run! for ’loop’ or the default event loop (as the case may be).
Here is an example of the use of await-generator-in-thread-pool!:
(set-default-event-loop!) ;; if none has yet been set (let ([pool (make-thread-pool 4)]) (event-loop-block! #t) ;; because the generator runs in another thread (a-sync (lambda (await resume) (await-generator-in-thread-pool! await resume pool (lambda (yield) (let loop ([count 0]) (when (< count 5) (yield (* 2 count)) (loop (+ count 1))))) (lambda (val) (display val) (newline))) (event-loop-block! #f)))) (event-loop-run!)
This procedure is first available in version 0.16 of this library.
Next: compose, Previous: event loop, Up: chez-a-sync reference


This is H1. Most probably one line.
This is H2. Most probably one line.
This is H3. Most probably one line.
This is H4. Will never be used probably.
This is H5. Will never be used probably.
This is H6. Will never be used probably.
This is p. Make sure it looks cool.
This is a link.


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SaxonAir and Cascade50 collaborated to grow the private aviator's data reporting infrastructure.
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This is a service that has endless limitations. What filters and dashboards would you like at your fingertips?


I'm a software engineer and a senior at the University of British Columbia studying Computer Science.
Through past experiences, I realized that I really enjoy learning new things so I'm always open to trying out different kinds of projects. After all, the best way to learn something new is to just dive in and get your hands dirty. And even though that means horribly failing sometimes, giving it a shot in the first place is something worth smiling about.
In my free time, you'll probably catch me either drawing, playing the guitar, or writing songs. Actually, I enjoy pretty much anything that provides a creative outlet for me. I think programming is in the same vein; it's like an empty canvas, full of endless possibilities, just waiting for you to create anything your heart desires.
Thanks for dropping by!
Email<EMAIL_ADDRESS>GitHub: https://github.com/jinichu
Resume: https://jinny.io/resume.pdf
Location: Vancouver, Canada
My first attempt at a website was as a twelve year old enrolled in an HTML summer camp. My website was decorated with my two favourite colours back then: hot pink and yellow. Even though the yellow font was hard to read against the pink background, I insisted that having a "neat" website theme (like "pink lemonade") was far more important than readability. It was also flooded with random content, from cat pictures to copious amounts of buttons that were used as links to songs. Needless to say, it looked terrible but probably exactly what you'd expect from an inexperienced twelve year old. I remember how cool and tech-savvy I thought I was when I figured out how to embed Youtube videos. There were a lot of videos on that site from then on.
Many years after, I decided to take another crack at writing a personal website. While there aren't any funny pictures of cats this time around, you can tell my insistence for a "neat" theme hasn't gone away. I just hope it doesn't hurt your eyes too much.


@Target(value={METHOD,FIELD})
@Retention(value=RUNTIME)
public @interface CollectionTable
By default, the columns of the collection table that correspond
to the embeddable class or basic type are derived from the
attributes of the embeddable class or from the basic type according
to the default values of the Column
annotation. In the case
of a basic type, the column name is derived from the name of the
collection-valued field or property. In the case of an embeddable
class, the column names are derived from the field or property
names of the embeddable class.
Column
annotation is used on the
collection-valued attribute in addition to the
ElementCollection
annotation.
AttributeOverride
and/or
AttributeOverrides
annotations can be used in
addition to the ElementCollection
annotation. If the
embeddable class contains references to other entities, the default
values for the columns corresponding to those references may be
overridden by means of the AssociationOverride
and/or
AssociationOverrides
annotations.
If the CollectionTable
annotation is missing, the
default values of the CollectionTable
annotation
elements apply.
Example: @Embeddable public class Address { protected String street; protected String city; protected String state; ... } @Entity public class Person { @Id protected String ssn; protected String name; protected Address home; ... @ElementCollection // use default table (PERSON_NICKNAMES) @Column(name="name", length=50) protected Set<String> nickNames = new HashSet(); ... } @Entity public class WealthyPerson extends Person { @ElementCollection @CollectionTable(name="HOMES") // use default join column name @AttributeOverrides({ @AttributeOverride(name="street", column=@Column(name="HOME_STREET")), @AttributeOverride(name="city", column=@Column(name="HOME_CITY")), @AttributeOverride(name="state", column=@Column(name="HOME_STATE")) }) protected Set<Address> vacationHomes = new HashSet(); ... }
ElementCollection
,
AttributeOverride
,
AssociationOverride
,
Column
| Modifier and Type | Optional Element and Description |
|---|---|
java.lang.String |
catalog
(Optional) The catalog of the table.
|
ForeignKey |
foreignKey
(Optional) Used to specify or control the generation of a
foreign key constraint for the columns corresponding to the
joinColumns element when table generation is in
effect. |
Index[] |
indexes
(Optional) Indexes for the table.
|
JoinColumn[] |
joinColumns
(Optional) The foreign key columns of the collection table
which reference the primary table of the entity.
|
java.lang.String |
name
(Optional) The name of the collection table.
|
java.lang.String |
schema
(Optional) The schema of the table.
|
UniqueConstraint[] |
uniqueConstraints
(Optional) Unique constraints that are to be placed on the
table.
|
public abstract java.lang.String name
public abstract java.lang.String catalog
public abstract java.lang.String schema
public abstract JoinColumn[] joinColumns
JoinColumn
(i.e., the
concatenation of the following: the name of the entity; "_";
the name of the referenced primary key column.) However, if
there is more than one join column, a JoinColumn
annotation must be specified for each join column using the
JoinColumns
annotation. In this case, both the
name
and the referencedColumnName
elements must be specified in each such
JoinColumn
annotation.public abstract ForeignKey foreignKey
joinColumns
element when table generation is in
effect. If both this element and the foreignKey
element of any of the joinColumns
elements are
specified, the behavior is undefined. If no foreign key
annotation element is specified in either location, the
persistence provider's default foreign key strategy will
apply.public abstract UniqueConstraint[] uniqueConstraints
public abstract Index[] indexes


Harshit AdityaStudies at Sikkim Manipal Institute Of Technology I am a java developer who is currently learning web development |
| Year | Workings |
|---|---|
| 2009-2020 | Compled +2 at Sapphire International School |
| 2020 | Studies at Sikkim Manipal Institute Of Technology |
| Skills | Experience |
|---|---|
| Java | 7/10 |
| Python | 5/10 |
| C | 4.5/10 |
| Web Development | 1/10 |


Ire Aderinokun
Ire Aderinokun is a self-taught UI/UX Designer and Front-End Developer currently working remotely as a software developer at eyeo. With degrees in Experimental Psychology and Law, Ire is adept at technical writing and breaking down complex concepts to be easily understood at all levels. Since starting her blog, bitsofcode, in 2015, she has made numerous articles on HTML, CSS, and JavaScript. She has now contributed over 150 articles and video tutorials to the development community. Ire is a huge advocate for open source and sharing within the development community. She contributes to open source projects and speaks at events to share her knowledge. She also ran a scholarship program to sponsor a few Nigerian women to complete a Udacity Nanodegree of their choosing for 6 months. 4 out of 7 candidates successfully completed the course. Some of her works are listed below.
- The CanIUse Embed: An embedabble widget to display up-to-date data from caniuse.com. Displays feature support data for multiple versions of the 10 major browsers. Configurable, reliable, and fully responsive.
- Opera Mini Tips: A collection of front-end development features not supported by Opera Mini and some crowdsourced workarounds for them.
- Formhack: Formhack is a "hackable sass-based form reset". Created to be easily customizable for any site without users worrying about cross-browser compatibility and differences.
- Gulp Email Workflow: A workflow for building HTML emails using Gulp. It comes with a default MailChimp-supported template.
- Designer News for Slack: A Slack bot that fetches and displays stories from Designer News directly into Slack.
- Open Writer: A free theme for the Ghost blogging platform. It has been consistently listed as one of the top free themes on their theme Marketplace, and has been featured in a list of "Superb Free and Premium Ghost Themes".
- Khaled Bot: Khaled Bot is a fun bot for Slack that mimicks DJ Khaled. It was created by Ire as an excercise in learning basic AI and getting better at Node.js. It was featured on Product Hunt and TechCabal.
- botsofcode: A Twitter bot for Ire's blog, bitsofco.de.
- Messenger Hunt: Delivers the best new products from Product Hunt to user's Facebook Messenger.
- Feature Queries Manager: an extension to developer tools to help users better work and test user feature queries.
- app.bitsofco.de: A Progressive Web Application for her blog, bitsofco.de
Products & Tools
- Making Accessibility Easy- Øredev Malmo, Sweden. November, 2018
- CSS for the Next Billion Users- Pixel Pioneers, Belfast, Northern Ireland. November 2018
- Making Web Accessibility Easy- ITKonekt conference, Belgrade. April, 2018.
- Web Accessibility: It Doesn't Have to be Hard- Google Developer Experts Summit, Krakow, Poland. September, 2017
- Web Components: The Future of Web Applications- Google I/O Extended. June 2017. Lagos, Nigeria
- Building Modern Progressive Web Apps- GDG South West Nigeria DevFest. November 2016. Lagos, Nigeria
- Responsive Web Design Codelab- Frontstack. October 2017. Lagos, Nigeria
- Becoming a GDE & Overcoming Stage Fright- Google WTM Leads Summit. September 2017. Lagos, Nigeria
- An Introduction to UI/UX Design- forLoop Women. June 2017. Lagos, Nigeria
Conferences
- Bitkoin africa: Bitkoin Africa is Person-to-Person (P2P) cryptocurrency trading platform where users can sell and buy cryptocurrency from other users. They're based in Lagos, Nigeria and cater to Nigerians in Nigeria who are interested in trading cryptocurrency.
- BuyCoins: BuyCoins (Y Combinator S18) is a cryptocurrency exchange for Africa. BuyCoins is the only exchange in Nigeria that allows Nigerians to buy and sell cryptocurrencies, ranging from Bitcoin and Ethereum, to Litecoin and Bitcoin Cash, directly with their local bank account or debit card.


Ex-Prime Minister Sharif Leaves Pakistan For Medical Treatment
Pakistan's ailing former Prime Minister Nawaz Sharif has left the eastern city of Lahore to receive medical treatment in London.
Sharif departed on a special plane from on November 19, after the Lahore High Court last week allowed him to seek medical treatment abroad.
He was accompanied by his brother Shehbaz Sharif, leader of the opposition Pakistan Muslim League-Nawaz (PML-N) party, and a team of doctors, and paramedics.
Sharif will travel via the Qatari capital, Doha, in a "high-end Air Ambulance equipped with a fully functional & staffed Intensive Care Unit (ICU) & Operation Theatre (OT)," his personal physician, Adnan Khan, tweeted on November 17.
Ahead of his departure, Sharif was administered steroids and medicines to ensure that his condition remains stable during travel, according to PML-N spokeswoman Marriyum Aurangzeb.
Sharif, who was sentenced earlier this year to seven years in prison on corruption charges, was rushed from his cell to a hospital in Lahore on October 21 after his health deteriorated.
The Islamabad High Court on October 29 suspended his conviction for two months on medical grounds.
While in hospital, the 69-year-old Sharif was diagnosed with an immune-system disorder. He is also on drugs for a cardiac problem, and suffers from diabetes and kidney issues.
Sharif, a three-time prime minister, was removed from office by the Supreme Court in 2017 over corruption allegations.
He has denied the charges, saying they are politically motivated.


1-2 person tents and 6-8 person tents
Sleeping pads and cots
Canopies and screened canopies
Cast iron pans, bbq tools, and more
Folding tables and camp chairs
Prefilled boxes of all the items you need


What is Apinf Hackathon?
Apinf is a new open source API management platform that will be launched in MindTrek OpenMind 2015.
We are excited to invite you to a hackathon 12 September 2015: Your challenge is to create a small application or integrate your existing application using Apinf as the API proxy. The winner will be the application that is most interesting or fun! You can create the application on programming language or platform of your choice.
Come with your laptops and ideas - breakfast, snacks and soda will be on us! At the end of the hackathon, you’ll have 5 minutes to show off your application. Participation is free of charge.
Registration deadline is Tuesday 8 September. If there are more than 5 registered teams, we will inform about the team selections 9 September.


This is an example of Custom element Chart with waterfall series. Waterfall series are used to display the cumulative effect of sequential data. You can see how to change the color via the colorFunction.


[gecode-users] commit on already-assigned variable
Christian Schulte
cschulte at kth.se
Mon Mar 31 12:20:57 CEST 2014
Hi,
This is most likely okay and can happen due to recomputation during search:
it might be the case that the variable has already been assigned by
propagation during recomputation before the commit operation is executed.
If you want to test whether this behavior is due to recomputation you can in
fact disable recomputation by passing 1 as a vlue for the commit
recomputation distance (-c-d 1 on the command line).
Cheers
Christian
--
Christian Schulte, Professor of Computer Science, KTH,
www.ict.kth.se/~cschulte/
-----Original Message-----
From: users-bounces at gecode.org [mailto:users-bounces at gecode.org] On Behalf
Of kellen at cretin.net
Sent: Sunday, March 30, 2014 7:19 PM
To: users at gecode.org
Subject: [gecode-users] commit on already-assigned variable
Hej!
I'm working on implementing bit-vector variables in gecode, following the
example given in MPG.
A part of this is providing relevant View selection for the brancher. I have
done so with a NONE implementation which also follows the model given in
MPG, which returns parameterized a ViewSelNone:
return new (home) ViewSelNone<BitView>(home, bvb);
Where BitView is the type of views on the variable implementations
(typedef'd as unsigned int), and bvb is a "BitVarBranch". So far, so good.
Later, I have defined a ValCommit class, including a commit function:
ModEvent commit(Space& home, unsigned int a, BitView x, int i, BitType
n);
Since I am branching based on the values of certain bits of the BitView x,
there are only two alternatives (a == 0, a != 0). The parameter n provides a
mask with only a single set bit which determines the bit on which branching
occurs.
My issues is that the search engine appears to be calling commit() on
already-assigned variables which violates a check I have implemented there
to validate the input as well as violates my expectation of how the engine
should function with a NONE-typed variable/view selection.
Specifically, I have an array of 64 4-bit bitvector variables and at some
point during search, commit() is called on variable 56, which is already
assigned. I have verified in GDB that the variable is, in fact, assigned. I
can see in GDB that this variable is branched on a number of times before
failure. The relevant backtrace when failure occurs:
#0 BV::Bit::ValCommitBitSplit::commit (this=0x9972500, home=..., a=0,
x=..., i=56, n=1) at src/bitvec/branch.cpp:144
#1 0x08068331 in Gecode::ValSelCommit<BV::Bit::ValSelRndBit,
BV::Bit::ValCommitBitSplit>::commit (this=0x99724f8, home=..., a=0,
x=..., i=56, n=1) at
gecode/gecode/kernel/brancher-val-sel-commit.hpp:175
#2 0x080774b8 in Gecode::ViewValBrancher<BV::Bit::BitView, 1, unsigned int,
2u>::commit (this=0x9972610, home=..., c=..., b=0)
at gecode/gecode/kernel/brancher-view-val.hpp:286
#3 0x4003911c in Gecode::Space::_commit (this=0x80b13a0, c=..., a=0) at
gecode/kernel/core.cpp:417
#4 0x40046dad in commit (a=<optimized out>, c=..., this=0x80b13a0) at
./gecode/kernel/core.hpp:2786
#5 commit (i=137, s=0x80b13a0, this=0x80cfb88) at
./gecode/search/sequential/path.hh:259
#6 recompute (stat=..., a_d=<optimized out>, d=@0x80cfba8: 3,
this=0x80cfb88) at ./gecode/search/sequential/path.hh:325
#7 next (this=0x80cfb44) at ./gecode/search/sequential/dfs.hh:148
#8 Gecode::Search::WorkerToEngine<Gecode::Search::Sequential::DFS>::next
(this=0x80cfb40) at ./gecode/search/support.hh:84
#9 0x0804dcda in next (this=<optimized out>) at
gecode/gecode/search/dfs.hpp:53
#10 main (argc=4, argv=0xbffff2f4) at src/main.cpp:75
I'm not quite sure how to proceed since the search process is rather
difficult to step through in the debugger and since I'm using the built-in
ViewSelNone.
Any suggestions? I can provide code for any relevant methods, but it's not
clear to me which would be actually useful for you guys to see.
System info:
OS: debian linux, kernel <IP_ADDRESS>-kvm-i386-20111128-dirty,
running in a VM (KVM or UML, I'm not quite sure) Gecode version: 4.2.1,
built from source
g++ (Debian 4.7.2-5) 4.7.2
Cheers,
Kellen
_______________________________________________
Gecode users mailing list
users at gecode.org
https://www.gecode.org/mailman/listinfo/gecode-users
More information about the users
mailing list


| Operands | Boolean Expression | |
|---|---|---|
| x < 12 | y > 10 | x < 12 || y > 10 |
| F | F | F |
| F | T | T |
| T | F | T |
| T | T | T |
Truth tables are usually organized by putting the operands in a conventional order. Following this order helps prevent mistakes. This table follows the conventional order for two operands:
| A | B | expression |
|---|---|---|
| F | F | - |
| F | T | - |
| T | F | - |
| T | T | - |
Here, A
and B
represent operands.
Often these are relational expressions such as x<12
.
The conventional order is easy to remember if you think of F as 0 and T as 1.
Arrange the rows in ascending numerical order, as follows:
| A | B | expression |
|---|---|---|
| 0 | 0 | - |
| 0 | 1 | - |
| 1 | 0 | - |
| 1 | 1 | - |
Courses on digital logic usually use 0 for false and 1 for true and use truth tables such as the above.
The conventional order is also used with tables with more than two operands.
With three operands, a table has eight rows.
With N
operands, a table has 2N
rows.
Fill the first table with the convential order of "0" and "1" (think about what should be in each row before you click the buttons). Do the rows in order, starting with the top. Then fill in the second table with the conventional order of "T" and "F".


The key component of HTML is an element.  An element is opened and closed by a tag.
Elements are classified as either inline or block.A tag can also have an attribute.  For example, the anchor tag uses the href attribute to set the target of the anchor.
Following this link will take you to a search engine that you could use to search for other examples of attributes.


European COVID Viewer
Worldwide Stats
Total Cases:
Total Cases
Today Cases:
Today Cases
Total Deaths:
Total Deaths
Today Deaths:
Today Deaths
Total Recovered:
Total Recovered
Today Recovered:
Today Recovered
Active:
Active
Critical:
Critical
Total Tests:
Total Tests
Country
Total Cases
Today Cases
Total Deaths
Today Deaths
Total Recovered
Today Recovered
Active
Critical
Total Tests
Country
Total Cases
Today Cases
Total Deaths
Today Deaths
Total Recovered
Today Recovered
Active
Critical
Total Tests


As always, we recommend that you read the entire homework before you begin work. As always, you must commit and push to your Git repository, then submit in Submitty.
Submission Instructions
· Follow the directions in the version control handout for cloning your git repo.
· Be sure to commit and push the files to Submitty. Follow the directions in the version control handout for adding and committing files.
· Be sure to add any additional files to your repo using Team/Add to Index.
· Important: You must press the Grade My Repository button, or your answers will not be graded.
You should have package hw4 with the usual directory structure. Write your code under src/main/java/hw4 and your tests under src/test/java/hw4 (shows as hw4 under src/test/java in Package Explorer). If your directory structure is incorrect autograding will fail resulting in a grade of 0!
In this assignment, you will design, implement, and test a graph ADT. Given an abstract, high-level description of the desired ADT, you will develop a working Java implementation. You get to choose both the public interface and internal representation, then decide what unit tests to write to demonstrate that your implementation works correctly.
Although this is an individual assignment, in the design stage
you will learn
more and produce a better design by bouncing your ideas off others
and
incorporating their ideas. To encourage and facilitate discussion,
we are
relaxing the standard academic integrity policy for the interface
design stage. You must first attempt to come up with an interface
design on your own, but then you are strongly encouraged to
discuss your design with your classmates who have also attempted a
design
(as well as the course staff during office hours) as much as you
like. On the other
parts of this assignment, including the implementation stage, the
standard
academic integrity policy still applies. That is, You
may not share code or pseudocode with other students.
This assignment is the first of a multi-part project. In subsequent assignments you will build several clients of your graph ADT.
In the rest of this assignment you will design, implement, and test a directed labeled multi-graph.
A graph is a collection of nodes (also called vertices) and edges. Each edge connects two nodes. In a directed graph, edges are one-way: an edge e = ⟨A,B⟩ indicates B that is directly reachable from A. To indicate that B is directly reachable from A and A from B, a directed graph would have edges ⟨A,B⟩ and ⟨B,A⟩.
The children of node B are the nodes to which there is an edge from B. In Fig. 1, the children of B are A and C. Similarly, the parents of B are the nodes from which there is an edge to B. In Fig. 1, B only has one parent, A.
A path is a sequence of edges ⟨node1,node2⟩, ⟨node2,node3⟩, ⟨node3,node4⟩, .... In other words, a path is an ordered list of edges, where an edge to some node is immediately followed by an edge from that node. In Fig. 1, one possible path is ⟨B,A⟩,⟨A,B⟩,⟨B,C⟩. This path represents traveling from B to A to B to C. A path may traverse a given edge more than once.
A reflexive edge is an edge which starts and ends at the same node. In Fig 1. there is a reflexive edge from A to A: ⟨A,A⟩. Your graph implementation must allow for reflexive edges.
In a multigraph, there can be any number of edges (zero, one, or more) between a pair of nodes. Fig. 2 shows a multigraph with 2 edges from A to C.
In a labeled graph (Fig. 3), every edge has a label containing information of some sort. Labels are not unique: multiple edges may have the same label. In theory a graph could contain two "identical" edges with the same starting point, ending point, and label, but for this project you may decide whether to allow identical edges in your implementation. (Whatever you decide, make sure it is clearly documented so clients understand how they can use your ADT.)
If you want to learn more, read Wikipedia's definition of a graph. Then if you still have a question, ask us.
Many interesting problems can be represented with graphs. For example:
To start, you will specify the API for a Java class or classes representing a directed labeled multigraph. The API, or public interface, is the collection of public classes and methods that clients of your graph ADT will use. We recommend that you work in iterative layers of detail. Start rough — preferably with pencil and paper — by brainstorming what operations the ADT needs to support, how it might be logically broken into modules (classes/interfaces), and how these modules connect to each other. Then, jot down a list of methods for each class that provides these operations. Think through some possible client applications, particularly finding efficient routes between different buildings, to get an idea about what operations might be needed.
Initially you should keep your design rough — don't write formal class and method specifications with all the proper clauses right away. Your design will likely go through multiple iterations, and it's easier to throw away parts before you've invested too much effort in them.
Once you are satisfied with your high-level design, write a specification for each class and method. Follow the convention we have been using in this class, remembering to use both standard Javadoc tags (param, returns, throws) and the ones introduced for this course (requires, effects, modifies, etc.) Go over the slides for specifications again. A good approach is to create skeleton implementations of your classes containing only method “stubs”, then write your specifications in place in the code. A stub is a not-yet-implemented method whose body simply throws an exception, as you saw in the Homework 3 starter code. Stubbing out a class gives you the flexibility to write client code and tests that use it before completing the implementation. The skeleton code will not behave correctly or pass tests, but the program will compile and run.
For this assignment, you may restrict your graph to store the data in nodes and edge labels as Strings. We strongly recommend you DO NOT use Generics for this assignment. In a future assignment, you will use generics to make your ADT work with other data types — text, integers, doubles, etc. You may assume nodes are uniquely identified by their data contents: that is, no two nodes store the same data.
Design problems such as this one are open-ended by nature: we are not looking for one “right” design. There are principles of good design you have learned in lecture, however. You will also find suggestions of what to consider and how to approach the problem in the hints section. Also, designs naturally evolve as requirements change, so try to make your code extensible, but don't over-generalize.
Once you are done with the specification of your Graph ADT (overview, AF, and representation invariant and POS specs for each abstract operation) copy and paste your specs and stubs into the file answers/problem1.txt (you may also choose to use a pdf file,answers/problem1.pdf
,
rather than a text file).
You can use RatNum.java
from hw3 as a guide.
Write a black-box test suite for your Graph specifications. It is important to write your tests before your code, but your tests will not pass until you have completed Problem 3.
Create and commit new JUnit test classes in directory src/test/java/hw4. You must have a JUnit test case for GraphWrapper placed into file src/test/java/hw4/GraphWrapperTest.java which should already exist in your repository. (GraphWrapper is explained in Problem 3.) You may need to add other files later on. To create a new test case, right-click on hw4 under src/test/java, then New -> JUnit Test Case, then type a name for the new test class. And don't forget to add JUnit! Look back to Homework 0 and Homework 3 as examples of extensive test suites.
Team/Add to Index
to add the file to your repo.There are many ways to represent a graph. Here are a few:
You have freedom to design the Graph ADT as you wish (you can
name your class,
include operations as you chose, choose the rep as you like).
However, we require that
you implement an additional class, GraphWrapper
which has an instance field
of type your Graph ADT, and implements the following weakly
specified public methods. You don't have to write rep invariant,
abstraction function or checkRep() for GraphWrapper
.
GraphWrapper
does not represent an ADT, it simply redirects the work to your
Graph ADT.
You do need to write a test suite GraphWrapperTest.java
in directory src/test/java/hw4.
The purpose of GraphWrapper
is to allow us to test
your Graph ADT through
a common interface. Below is the abstract description of the
operations in GraphWrapper
.
Please answer the following questions in a file named reflection.pdf in your answers/ directory. Answer briefly, but in enough detail to help you improve your own practice via introspection and to enable the course staff to improve Principles of Software in the future.
Please answer the following questions in a file named collaboration.pdf in your answers/ directory.
The standard integrity policy applies to this assignment, with the exceptions described in the Introduction.
State whether or not you collaborated with other students. If you did collaborate with other students, state their names and a brief description of how you collaborated.
To give you some sense of the kinds of issues you should be considering in your design, here are some questions you might want to consider. These don't in general have simple answers. You'll need to exercise judgment, and think carefully about how decisions you make interfere with each other.
entrySet()
method of java.util.Map?In choosing what operations/methods to include, strive to include enough that the ADT will be convenient and useful for a client, but avoid the temptation to write an “everything but the kitchen sink” API. Generally speaking, it is better to design a minimal than a maximal API. In the real world, you can always add methods later. However, you can never remove them from a published API, and such methods may over-constrain the implementation in the future.
Make good use of the course staff. If you have concrete questions, then take your specification to office hours to get some feedback on your design and style. This is likely to save you a lot of time!
Although it is generally a bad idea to start coding before you have thought deeply, it often makes sense to work incrementally, interleaving design and coding. Once you have a sketch of your specification, you may want to write some experimental code. This should give you some concrete feedback on how easy it is to implement the methods you've specified. You may even want to start at the end, and write the code that uses your type, so that you can be confident that the methods you provide will be sufficient.
This strategy can backfire and degenerate into mindless hacking, leaving you with a pile of low-quality code and an incoherent specification. To avoid that, bear three things in mind:
It can be difficult to come up with a good test suite. You would like to test a variety of “interesting” graphs, but what are interesting graphs? One possible approach is a “0, 1, 2” case analysis: test scripts with 0, 1, and 2 graphs are interesting; graphs with 0, 1, and 2 nodes and 0, 1, and 2 edges are interesting. For each method, 0, 1, and 2 parameters and 0, 1, and 2 results are interesting; for example: addEdge on nodes that currently have 0, 1, and 2 children; listChildren on nodes with 0, 1, and 2 children; etc. This approach, while certainly not required, can give a good way to structure your tests to cover many important cases without having too much redundancy. Use EclEmma to measure your coverage and gain even more confidence in your tests.
Include an abstraction function, representation invariant, and private checkRep() method in all new classes you create that represent an ADT. If a class does not represent an ADT, place a comment that explicitly says so where the AF and RI would normally go. (For example, classes that contain only static methods and are never constructed usually do not represent an ADT — though you are unlikely to write any such classes for HW4.) Please come to office hours if you feel unsure about what counts as an ADT and what doesn't.
Be conscious of how certain operations in checkRep(), particularly iterating over a large dataset, may affect the “big-O” runtime of your methods. If your program suffers performance problems in Homework 4 or 5, checkRep() is a good place to start looking for problems.
It is hard to balance the utility of the checkRep() method with how expensive it may be to run. A good approach is to call checkRep() as much as possible (generally at the beginning and end of every method), but to disable the checkRep() when you turn in your code so that our tests don't timeout. A good way to do this is to have a static final constant variable that is checked in your checkRep() such that it only runs when the constant variable is set.
You may find it useful to define a class or classes that
implement method equals. If you do that, be sure to
also provide a consistent definition of method hashCode,
otherwise your objects may behave strangely if used in
containers like HashMaps. There is a good discussion of the
issues involved in Effective Java (item 10 in the 3rd
edition). Eclipse will generate an equals and hashcode for you,
but if you use it, be sure taht it actually fist your needs.
You are permitted but discouraged from implementing generic classes on this assignment (that will come later). A generic class is one defined as something like
public class Graph<N,E> { ... }
where a client could then construct a Graph<String,String>, Graph<City,Road>, etc.
If you choose to write a generic class, be aware that Eclipse's built-in compiler sometimes handles generics differently from javac, the standard command-line compiler.
This warning is only directed at students writing their own generic classes. Simply using, say, a List<String> or Comparator<Foo> (as you have been doing all along) should be fine.
Push to Git the following files. Don't forget to submit in Submitty!
None yet. Check the Submitty Discussion forum regularly. Updates to this homework will be posted there.
None yet.


Page is a layout container for a Kirby page. There should only be one
<kirby-page>
layout container per page.
The page component gives you the following:
All of the examples below use the legacy inputs/directives for title, subtitle and page
actions in the header area of the page. Please refer to the
Kirby Header documentation
for more info on how to migrate to the new
kirby-header
component.
Using page with the
kirby-router-outlet
will cause the views to be stacked instead of replaced.
The
kirby-router-outlet
stacks the pages/components when it navigates. This means that when one component is stacked on
top of another, the component on the bottom won't be destroyed. This means that the
ngOnDestroy
hook will not run as expected, and any logic for eg. unsubscribing from subscriptions is not
taking place. This can result in severe performance issues.
Below is an example on the recommended approach for 'pausing' subscriptions when a kirby-page is animating out of view.
kirby-page
has an `enter` and `leave` event which triggers whenever the page is entered and left. If your
component has subscriptions, it is important to unsubscribe when the component is in the
background. Otherwise the subscriptions will keep firing, causing performance issues.
When using a page with
kirby-router-outlet
it is possible to navigate to a new page using the Angular router. But in order to navigate the
history of the stack; the
NavController
class is necessary for the animations to work properly.
For example it is possible to navigate one step back when using stacked pages using the
back
method of the
NavController
class.
The
NavController
is provided by the
@ionic/angular
package and is being re-exported by Kirby.
NavController
documentation and usage details can be found
here
.
In rare use cases where it might be necessary to take complete control over the back button behavior Kirby Page exposes an injection token for exactly this.
When the token is provided the supplied
PageBackButtonOverride.navigateBack()
callback is executed whenever the back button is pressed. Within the method, you will have
access to the specific
NavController
and
IonRouterOutlet
instances that would otherwise have been called by Kirby Page which can be used for navigation
together with any custom logic.
For normal pages it's enough to just wrap the page content in a
kirby-page-content
tag, which is wrapped in a
kirby-page
tag and supplied with an optional title -
which will be sticky by default
:
Titles and subtitles are by default left aligned but can also be centered (
titleAlignment="center"
) or right aligned (
titleAlignment="right"
).
It is also possible to supply an alternative toolbar title (
toolbarTitle="A Different Title"
) -
that is shown instead of the page title
- when the page title is scrolled above the toolbar.
This can also be achieved through the
*kirbyPageToolbarTitle
directive.
Titles are default rendered as
h1
.
It's possible to enable auto-scaling of the page title. This will scale both font-size &
line-height between h1 -> h3 depending on amount of text and maximum number of lines
configured. This can be configured by setting the
titleMaxLines="NUMBER OF MAXIMUM LINES"
attribute of
kirby-page
.
This can also be achieved through the
*kirbyFitHeading
directive for
custom titles
.
If you need to supply a custom page title or subtitle element you can do that with the
*kirbyPageTitle
,
*kirbyPageSubtitle
and
*kirbyPageToolbarTitle
directives.
*Please note:
When supplying a custom page title element you must supply both a page title and a toolbar
title. You should also ensure the page title is wrapped in a
h1
tag. Usage of the page subtitle element requires the presence of a page title.
*Auto-scale page title:
If a custom page title is used you will need to add
kirbyFitHeading
directive at your heading-tag (h1) to take advantage of the automatic scaling.
*Custom page title wrapper:
If you wrap your custom title (e.g. in a flex-container) you have to ensure the title is
truncated (setting
overflow
and
text-overflow
css properties). See code example below.
For more advanced scenarios, you can supply a custom page element for title, subtitle, action
buttons and fixed content with the
*kirbyPage
-directives.
*Please note:
When supplying a custom page title element you must supply both a page title and a toolbar
title. You should also ensure the page title is wrapped in a
h1
tag. See example below on how to reuse a template for both titles. Usage of the page
subtitle element requires the presence of a page title.
*Custom page title wrapper:
If you wrap your custom title (e.g. in a flex-container) you have to ensure the title is
truncated. See "Custom Title" example.
If the
toolbarTitle
property is specified
instead
of the
title
property, the page title and actions will be
fixed
and shown only in the toolbar and not on the page itself.
*Please note:
Always apply the
*kirbyPageActions
directive to the action buttons host element to ensure the actions are shown in the toolbar.
This is especially important when using fixed titles:
For more advanced toolbar title scenarios, you can supply a custom toolbar title element
through the
*kirbyPageToolbarTitle
directive:
You can also have only the action button(s)
fixed
by configuring the
*kirbyPageActions
directive with
{{ '{' }}fixed: true{{ '}' }}
:
The
kirby-tab-navigation
element can be used to implement tab-based navigation at the page content level. The component
is placed before the page content using the
*kirbyPageStickyContent
directive. When the tab bar is scrolled beyond the page toolbar it will stick below the area.
The label text is specified using the
label
attribute of
kirby-tab-navigation-item
component.
An optional badge can be appended to the label text by adding a
kirby-badge
element inside the
kirby-tab-navigation-item
component.
If the
kirby-page-footer
component is present
outside
of the
kirby-page-content
, the page will show a
fixed
footer placed right under the content.
Furthermore, you can hide the
kirby-tab-bar
by specifying the
tabBarBottomHidden
property.
If the
kirby-page
component has been provided with an event-listener of type
refresh
a
kirby-spinner
will be displayed when
dragging down
from the top of the screen. This can be useful for
updating
the data in the current view, if new data has arrived or something changed in the meantime.
This could for instance be new messages added to the top of a list view. It should not be used
as a load-more type of event for simply adding more data to the view.
The
PullToRefreshEvent
's
complete()
-method can be invoked to indicate that the
refresh
-event has finished, e.g. when the required data has been loaded:
The
maxWidth
property can be used to select a preset that defines the max width of the content. This will
only impact the content areas as the top bar will continue to use the available space.


Never Doubt The Power of Your Network!
Encourage Meaningful Connections
by Trish TonajWe all have social media accounts where we share thought leadership and connect with a world wide audience.
As we expand and grow our business we create a network of like-minded individuals who share our interests and contribute to the dialogue.
The most powerful networks are those that not only share information but connect us with other individuals when we present an “Ask.”
What is interesting to note, is which platform you find is most helpful with a response. I have a colleague who relies on her network for not only business referrals but answers and recommendations for things like movies, books and social events.
Her network is extensive with many individuals she has never met and yet she is very passionate about the connections and posts in her newsfeed.
It creates a feel good experience!
We all have heard many negative comments about social media and the time and effort we spend on-line connecting with our communities. If we take a look at the macro level, we will see an opportunity to convey a positive message that resonates with our networks for the greater good.
I began to ask a number of my friends and colleagues how they expanded their global contacts to include so many individuals who share their common interests.
Here are a few suggestions:
- Rinse and Repeat – reach out to individuals where you share 25 or more common connections; ensure your bio is relevant and up-to-date. People will connect with you when they read your profile.
- Interests – ask to join groups where you share a passion.
- Content – everyone agrees that positive, uplifiting content will attract like-minded indivduals. What you post mst be authentic to you and your point of view. This will encourage other to reach out and begin a dialogue.
As an entrepreneur, I have a passion for helping others amplify their success. As a coach, my business is to assist others by increasing their visibility, encourage meaningful partnerships and contribute to their communities.
Expanding our networks is part of the formula for success and encouraging meaningful connections is part of that equation.
There is no doubt that meeting people face-to-face is very powerful and I think we all agree that that is still the ultimate connection. We would never miss the opportunity to sit with someone, share experiences and start a conversation.
It is the ultimate feel good experience!
When we view our connections through a different lens we will receive and share valuable information.
I do not believe there is any merit in pursuing a large network for numbers sake but rather build a tribe that will encourage and support you through the power of the posts.
The ask, presents another opportunity to engage followers so that we may get to know one another through the written word.  The people in our network have an opportunity to make a “human connection” through not only the visual but listening to our voice.
It creates another feel good experience!
The words that we share and the videos that we post say a lot about who we are and building a following of like-minded individuals is a great way to receive referrals and recommendations.
Never doubt the power of your network…You may find that you area able to encourage meaningful connetions!
Trish Tonaj is a Master Coach Practitioner, conducting keynotes and workshops on how to amplify your business. She is the founder and host of shareyourstories.online …breaking barriers, starting meaningful conversations and creating a new definition for success.
— Published on November 24, 2019


Corojo is a type of tobacco, primarily used in the making of wrappers for cigars. The variety was originally grown in the Vuelta Abajo region of Cuba but is today grown exclusively in the Jamastran valley of Honduras and in the United States in Western Kentucky.
Black Patch Cigar Co. Founder Eric McAnallen is having the Kentucky propagated Corojo, Kenbano(TM) seed planted for the 2011/2012 Dominican harvest after successfully growing this tobacco varietal in Western Kentucky since 2007. Two different growing areas, soil "signatures" in the Cibao valley have been identified for cultivation. The two areas where the Kenbano seed is being raised are Pinuela and Navarrete. The Navarrete soil matrix mirrors the soil of Vuelta Abajo, Cuba. Historically Navarrete has been ideal for Cuban heirloom seed success in the Dominican Republic. Pinuela has similar success with a soil analysis comparable to Pinar, Cuba. These soil components produce a robust growth in leaf yield per stalk and exhibit a peppery spice in flavor.


Unable to read master data. Here are possible reasons why:
- You opened this F12 Panel too late. Please open the F12 devtools panel before Game Start button.
- Guys I'm not really sure how you've been opening the game. But please read the instructions on-screen.  The game intro pages say that you'll need to press F12 panel on those screens, not after you start the game, not anywhen else.
- Again... Play via [method] -> F12 -> KanColle tab -> Game automatically starts


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Class for defining a battler in the simulator.
More...
#include <battlebot.h>
Class for defining a battler in the simulator.
Definition at line 19 of file battlebot.h.
Constructor
- Parameters
-
| name | Name of the BattleBot. |
| runner | Battle Runner this bot is tied to. |
Definition at line 8 of file battlebot.cc.
| int32_t BattleBot::AC |
( |
| ) |
|
Getter
- Returns
- AC of the bot. Helps determine if an attack hits or not.
Definition at line 234 of file battlebot.cc.
| int32_t BattleBot::attack_modifier |
( |
| ) |
|
Getter
- Returns
- Modifier added to attack rolls of the bot. Used to determine if an attack hits.
Definition at line 274 of file battlebot.cc.
| int32_t BattleBot::constitution |
( |
| ) |
|
Getter
- Returns
- Constitution of the bot.
Definition at line 204 of file battlebot.cc.
| int32_t BattleBot::damage_die |
( |
| ) |
|
Getter
- Returns
- What damage die is rolled.
Definition at line 254 of file battlebot.cc.
| int32_t BattleBot::damage_modifier |
( |
| ) |
|
Getter
- Returns
- Modifier added to the damage rolls of the bot.
Definition at line 284 of file battlebot.cc.
| void BattleBot::destroy_items_helper |
( |
std::vector< BattleBotItem * > & |
items | ) |
|
|
protected |
Destroys all provided items and frees their memory. Only to be used bt the destructor.
- Parameters
-
Definition at line 443 of file battlebot.cc.
| int32_t BattleBot::dexterity |
( |
| ) |
|
Getter
- Returns
- Dexterity of the bot.
Definition at line 224 of file battlebot.cc.
| std::string BattleBot::display |
( |
| ) |
|
Getter
- Returns
- Display of the bots current battle abilities.
Definition at line 72 of file battlebot.cc.
| std::vector< Action > BattleBot::get_armor_actions |
( |
int32_t |
key_base | ) |
|
Getter
- Parameters
-
| key_base | number to add to all the actions |
- Returns
- All of the actions for armor items in a contiguous block staring from
key_base
.
Definition at line 359 of file battlebot.cc.
| std::string BattleBot::get_battle_stats |
( |
| ) |
|
Getter
- Returns
- String representing the actions that the battle bot took during the fight.
Definition at line 93 of file battlebot.cc.
| std::vector<int32_t> bots::BattleBot::get_config |
( |
| ) |
|
|
inline |
Getter
- Returns
- All attached item ids: frame, armor, weapon, specialty.
Definition at line 158 of file battlebot.h.
| std::vector< std::string > BattleBot::get_detailed_loadout |
( |
| ) |
|
Getter
- Returns
- Detailed descriptions of each item the bot has attached.
Definition at line 117 of file battlebot.cc.
| std::vector< Action > BattleBot::get_frame_actions |
( |
int32_t |
key_base | ) |
|
Getter
- Parameters
-
| key_base | number to add to all the actions |
- Returns
- All of the actions for frame items in a contiguous block staring from
key_base
.
Definition at line 354 of file battlebot.cc.
| std::vector< Action > BattleBot::get_item_actions |
( |
int32_t |
key_base, |
|
|
std::vector< BattleBotItem * > & |
items |
|
) |
| |
|
protected |
Helper method for getting the actions from an item list.
- Parameters
-
| key_base | number to add to all the actions |
| items | BattleBot items that will be used to create actions. |
- Returns
- All of the actions for provided items in a contiguous block staring from
key_base
.
Definition at line 422 of file battlebot.cc.
| int32_t bots::BattleBot::get_num_armors |
( |
| ) |
|
|
inline |
Getter
- Returns
- The number of armor items availale.
Definition at line 122 of file battlebot.h.
| int32_t bots::BattleBot::get_num_frames |
( |
| ) |
|
|
inline |
Getter
- Returns
- The number of frame items availale.
Definition at line 118 of file battlebot.h.
| int32_t bots::BattleBot::get_num_specialties |
( |
| ) |
|
|
inline |
Getter
- Returns
- The number of specialty items availale.
Definition at line 130 of file battlebot.h.
| int32_t bots::BattleBot::get_num_weapons |
( |
| ) |
|
|
inline |
Getter
- Returns
- The number of weapon items availale.
Definition at line 126 of file battlebot.h.
| std::string BattleBot::get_simple_loadout |
( |
| ) |
|
Getter
- Returns
- String of the items loaded onto this bot.
Definition at line 105 of file battlebot.cc.
| std::vector< Action > BattleBot::get_specialty_actions |
( |
int32_t |
key_base | ) |
|
Getter
- Parameters
-
| key_base | number to add to all the actions |
- Returns
- All of the actions for specialty items in a contiguous block staring from
key_base
.
Definition at line 369 of file battlebot.cc.
| std::vector< Action > BattleBot::get_weapon_actions |
( |
int32_t |
key_base | ) |
|
Getter
- Parameters
-
| key_base | number to add to all the actions |
- Returns
- All of the actions for weapon items in a contiguous block staring from
key_base
.
Definition at line 364 of file battlebot.cc.
| void BattleBot::init_items_helper |
( |
std::vector< BattleBotItem * > & |
items | ) |
|
|
protected |
Initialized all items by setting this bot as their attached bot.
- Parameters
-
| items | Items to attach to bot. |
Definition at line 468 of file battlebot.cc.
| bool bots::BattleBot::is_dead |
( |
| ) |
|
|
inline |
Checks if the bot is dead.
- Returns
- If the bot is dead.
Definition at line 62 of file battlebot.h.
| void BattleBot::match_configuration |
( |
BattleBot & |
other | ) |
|
Matches the configuration of this bot to the given bot.
- Parameters
-
| other | Bot to match configuration to. |
Definition at line 374 of file battlebot.cc.
| std::string BattleBot::name |
( |
| ) |
|
Getter
- Returns
- Name of the bot.
Definition at line 67 of file battlebot.cc.
| int32_t BattleBot::num_attacks |
( |
| ) |
|
Getter
- Returns
- Number of attacks made in one action.
Definition at line 264 of file battlebot.cc.
| int32_t BattleBot::num_damage_die |
( |
| ) |
|
Getter
- Returns
- Number of damage die rolled.
Definition at line 244 of file battlebot.cc.
| void BattleBot::set_armor |
( |
int32_t |
id | ) |
|
Setter
- Parameters
-
| id | ID of the armor item to use. If id does not point to a item id, sets empty item. |
Definition at line 309 of file battlebot.cc.
| void BattleBot::set_frame |
( |
int32_t |
id | ) |
|
Setter
- Parameters
-
| id | ID of the frame item to use. If id does not point to a item id, sets empty item. |
Definition at line 294 of file battlebot.cc.
| void BattleBot::set_specialty |
( |
int32_t |
id | ) |
|
Setter
- Parameters
-
| id | ID of the specialty item to use. If id does not point to a item id, sets empty item. |
Definition at line 339 of file battlebot.cc.
| void BattleBot::set_weapon |
( |
int32_t |
id | ) |
|
Setter
- Parameters
-
| id | ID of the weapon item to use. If id does not point to a item id, sets empty item. |
Definition at line 324 of file battlebot.cc.
| int32_t BattleBot::strength |
( |
| ) |
|
Getter
- Returns
- Strength of the bot.
Definition at line 214 of file battlebot.cc.
The documentation for this class was generated from the following files:


{% extends 'ShipBooking/base.html' %} {% block content %} ADD NEW SHIPS ADD NEW ROUTES UPDATE SHIP DETAILS DELETE SHIP DELETE ROUTE EXIT
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Doc-Centric Sales: South Region
Sales in the Southern region were off last year as the economy entered a slight
downturn. Sales of the M100-10 model suffered the largest decline - 15% under
sales two years ago. The lone bright spot was the continuing strong sales of the M300-25
unit which increased as last year progressed.


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Hosted at the nation’s pinnacle center for care, MedHacks is the world’s premier and largest medical hackathon. Join us at the Johns Hopkins Hospital for 36 hours to revolutionize the global state of healthcare!
MedHacks was started in 2015 with the mission to bring together talented and diverse minds from all backgrounds and foster collaboration towards solving the world’s most pressing medical issues.
In the past three years, MedHacks has been attended by thousands from over 500 institutions and 30 countries, has formed partnerships with companies at the forefront of medicine and technology including Blue Cross Blue Shield, CVS Health, Google, and KPCB, and has established itself as one of the world’s most recognized and influential medical hackathons.
The MedHacks brand has grown into something larger than our flagship medical hackathon with the introduction of 2 new events this spring: (1) Mini-MedHacks: a 1-day medical hackathon for Baltimore city high-school students and (2) The China-U.S HealthTech Forum: bringing together speakers such as Jim Lai, the VP of Tencent, and Lee Chang, the VP of Baidu Ventures, to talk about the global state of healthcare innovations.
Join us at MedHacks 2018: Snow Day, where we are bringing the largest healthcare & technology companies in collaboration with the Johns Hopkins Medicine Network to revolutionize the way we think about medicine.
We believe that the most pressing medical challenges must be solved by interdisciplinary and diverse teams of people. We don’t care about whether or not you’ve won coding competitions, or even if you’re pursuing an engineering or CS degree. You don’t need a PhD or MD to innovate in healthcare, all you need is a passion for bettering humanity.
Last year at MedHacks 2017, we hosted over 750 hackers from more than 300 schools and 15 countries, with diverse majors ranging from public health to anthropology to computer science. We had teams of all ages including undergraduates, graduate students, and medical professionals all coming together with diverse expertise and backgrounds.
We’re thrilled to introduce the theme for MedHacks 2018: Snow Day! It’s been a long, exhausting year, and we know that we could all use a day (or three) to relax, not think about school work, huddle up with a computer and some teammates, and focus on innovating healthcare. Even though September in Baltimore is not exactly known for its below-zero temperatures, we’ll be sure to bring the cool within the Johns Hopkins Hospital with our trusty moose, Melvin, by our sides!
Originally hailing from the chilliest, northernmost forests of the United States, Melvin the Moose spent his early days by rivers, feasting on leaves and shrubs without a care in the world. One day he ventured a little (...okay, a lot) farther than usual on his journey to find a new grazing spot and stumbled upon the Johns Hopkins University campus. He was amazed - there was so much greenery to munch on! It was a dream come true. After taking a bite of grass, he felt a slight tingle in his body.
After getting a bite to eat, Melvin felt his body shrink to the size of a small human. His front hooves became dexterous, and he suddenly gained the ability to crunch numbers and function long days and nights without sleep. Disoriented by this sudden transition, he was found sprawled out under the gazebo by a MedHacks student. He was taken in and nursed back to health with the rare elixir of Soylent.
Touched by the student’s kindness, Melvin the Moose joined MedHacks to meet more of these awesome people (and also to get his hooves on more of that delicious Soylent). He fit right in, and now is an integral member of our family. However, one of his projects, Melvin accidently wrote the wrong code, somehow manipulating space-time to bring winter home a lot earlier than usual... which is why our theme for MedHacks 2018 is Snow Day!
We welcome anyone passionate about the MedHacks mission to apply to join our team as a Campus Ambassador. What this entails is spreading the word about MedHacks at your university/city. Campus ambassadors are an integral part of the MedHacks organizing team and receive a guaranteed acceptance to MedHacks, a guaranteed travel reimbursement, and custom swag.
We are closing campus ambassador applications on July 20th at 11:59pm EST. Please email<EMAIL_ADDRESS>to learn how you can get involved.
At MedHacks 2018: Snow Day, you’ll have the choice of choosing a project within our three tracks. The hack you decide to do must fall within the track that you choose and you will be judged within your track for a track-specific prize. The three tracks
from MedHacks 2017 were Medication Adherence with CVS Health, Patient Safety & Quality with Hopkins Medicine, and Access to Care with Blue Cross Blue Shield.
The Johns Hopkins Armstrong Institute for Patient Safety and Quality and the Johns Hopkins School of Nursing are proud to sponsor a Patient Safety and Quality track at MedHacks 2018. Your participation in this track and innovative ideas can further their shared commitment to eliminate preventable harm to patients and achieve the best outcomes at the lowest cost possible. The three focus areas highlighted in the track are Geriatric Safety, Joy of Practice, and Digital Approaches to Care Management. There will be a number of faculty mentors from both the Armstrong Institute and the School of Nursing available for the entire weekend to assist you with your project.
Some other useful links are provided below:
The New Script of Nursing
Understanding CUSP and the CUSP Team
Winners of this track will be given private professional development sessions with leadership from within the Johns Hopkins University network.
We at the BCBS Institute are excited to sponsor the Community Health Infrastructure track at MedHacks 2018. The future of health is governed by the capacity to better design and manage the Infrastructure within the community setting. The Community Health Infrastructure track extends into the community setting to address barriers, such as primary care desert, pharmacy desert, nutrition desert, transportation desert, and fitness desert. The window of opportunity exists to help shape the future of the new health service delivery model for the next decade.
Some other useful links are provided below:
BCBSA Institute
BCBSA partnering with Lyft, CVS, and Walgreens
Winners of this track will be given private professional development sessions with John Banta, the Executive Director of the Blue Venture Fund.
The Johns Hopkins University Alliance for a Healthier World through its Transformative Technologies and Institutions theme is proud to sponsor this year’s newly established “Open Science to Advance Health Equity” track. Your team’s mission is to help us advance health equity through an open science “hack.’ By health equity, we mean not just the finding of disparity, but also coming up with solutions to reduce or resolve them.
Your project might build upon the following focus areas: Scaling Technology Platforms, Making Data Actionable, or Empowering Patients.
Some quick links to guide you in choosing this track:
A dedicated webpage with resources to jumpstart your efforts
The winning team will receive $500 plus free consultation with the Hopkins Social Innovation Lab. Teams with at least one Hopkins student also eligible for $1000 in translational support from Hopkins Fast Forward U.
MedHacks receives thousands of applications from talented and diverse people all around the world every year, but unfortunately we don’t have the space to accommodate everyone who would like to attend.
MedHacks prides itself on being accessible for all students, especially those without any kind of computing background, and so we try as hard as possible to reflect that in the population of participants at the event. We encourage all individuals interested in any (or all!) of the fields of medicine, technology, and entrepreneurship to apply. We’d love to have you!
We follow a rolling application basis, so the earlier you apply, the more likely you’ll be able to be accepted! General applications will be closing on August 31st at 11:59 PM EST. Applications for JHU students close on September 3rd at 11:59 PM EST.
This year, in order to streamline the application process, our talented team of developers have developed an application portal. Once you create an account you can submit an application, view the status of your application and view any resources.
If you are interested in receiving a travel reimbursement, you must indicate this on your application. You can then fill out travel reimbursement applications if you have indicated it on their application. We offer reimbursements in $50, $100, $250 increments depending on where you are coming from.
The deadline for a National/International travel reimbursement (up to $250) is July 20th at 11:59 PM EST. The deadline for a Midwest/Regional travel reimbursement (up to $100) is August 15th at 11:59 PM EST.
Additionally, we’ve previously sent buses to universities such as the University of Maryland and UMBC, and would love to consider sending to yours as well! Please contact us here if you’re interested in having a bus from your school.
Please note that if your forms are not filled out correctly by the due date, you will not receive a travel reimbursement. There will be no exceptions to this rule.
Roy Ziegelstein, M.D., MACP is the Vice Dean for Education at Johns Hopkins University School of Medicine and the Vice Chair of Humanism in the Department of Medicine at Johns Hopkins Bayview Medical Center.
Dr. Ziegelstein has been an NIH-funded basic and clinical investigator in cardiology, with research focused on vascular biology. For the past 20 years, he has been a leader in research on depression and cardiovascular disease. Dr. Ziegelstein also directed the internal medicine residency training program at Johns Hopkins Bayview from 1997-2006. He co-directs the Aliki Initiative, a program for internal medicine residents that is focused on the practice of patient-centered care.
Trent Haywood, M.D., J.D., is chief medical officer for the BlueCross BlueShield Association (BCBSA), a national federation of 36 independent, community-based and locally operated Blue Cross and Blue Shield companies. The Blue System is the nation’s largest health insurer covering one-in-three of all Americans.
As the Association’s chief medical officer, Haywood supports the innovation of BlueCross and BlueShield companies in communities around the country as they improve the choices of healthcare quality and patient safety for their members. Haywood also leads the BlueCross BlueShield Institute, a first-of-its-kind benefit corporation established to address social determinants of health through technology and strategic collaborations.
| Time | Event | Location |
|---|---|---|
| 3:00-5:00 PM | Registration | Turner Auditorium Terrace |
| 3:00-5:30 PM | Sponsor Fair | Turner Concourse |
| 6:00-7:30 PM | Opening Ceremony | Turner Auditorium |
| 7:30-8:30 PM | Dinner | Turner Concourse |
| 8:30-10:30 PM | Track Pitching Session | Rooms tbd |
| 10:30-12:00 AM | Team Formation and Registration | tbd |
| 12:00 AM | Hacking Begins! | tbd |
| Time | Event | Location |
|---|---|---|
| 12:30 AM | Midnight Snack | tbd |
| 8:30 AM | Breakfast | tbd |
| 10:00-11:15 PM | Big Data in Healthcare Panel | Turner Auditorium |
| 12:00 PM | Lunch | tbd |
| 1:00-7:00PM | Workshops (TBA) | tbd |
| 3:00PM | Afternoon Snack | tbd |
| 6:30 PM | Dinner | tbd |
| 7:00PM | Team Registration Due | tbd |
| Time | Event | Location |
|---|---|---|
| 12:30 AM | Midnight Snack | tbd |
| 8:30 AM | Breakfast | tbd |
| 9:30 AM | Final Submissions Due on DevPost | tbd |
| 10:00-11:45 AM | Judging Round 1 | tbd |
| 12:00 PM | Judging Round 1 Results | tbd |
| 12:00 - 2:00 PM | Snacks and 2nd Sponsor Fair | tbd |
| 12:30-2:00 PM | Judging Round 2 | tbd |
| 2:00-3:00 PM | Lunch | tbd |
| 3:00-4:00 PM | Closing Ceremony | Turner Auditorium |
| Time | Event |
|---|---|
| 3:00-5:00 PM | Registration |
| 3:00-5:45 PM | Sponsor Fair |
| 6:00-7:30 PM | Opening Ceremony |
| 7:30-8:30 PM | Dinner |
| 8:30-10:30 PM | Track Pitching Sessions |
| 10:30-12:00 AM | Team Formation and Registration |
| 12:00 AM | Hacking Begins! |
| Time | Event | |
|---|---|---|
| 12:30 AM | Midnight Snack | |
| 8:30 AM | Breakfast | |
| 10:30-2:00 AM | Big Data in Healthcare Panel | tbd |
| 12:00 PM | Lunch | |
| 1:00-7:00 PM | Workshops | |
| 3:00 PM | Afternoon Snack | |
| 6:30 PM | Dinner | |
| 7:00 PM | Team Registration Due |
| Time | Event |
|---|---|
| 12:30 AM | Midnight Snack |
| 8:30 AM | Breakfast |
| 9:30 AM | Submissions Due on DevPost |
| 10:00-11:45 AM | Judging Round 1 |
| 12:00 PM | Judging Round 1 Results |
| 12:00-2:00 PM | Snacks and 2nd Sponsor Fair |
| 12:30-2:00 PM | Judging Round 2 |
| 2:00-3:00 PM | Lunch |
| 3:00-4:00 PM | Closing Ceremony |
Applications for MedHacks 2018 are open! Please sign into our application portal here.
Sign into the MedHacks application portal here, and your application status, as well as the status of any other pending applications (travel reimbursements, etc), will be displayed on your profile page.
At least four members of the MedHacks executive team read each and every application made to MedHacks and decide as a group whether to offer acceptance to a applicant. All MedHacks admission decisions are final and we do not offer the reasoning behind any applicant's acceptance or rejection for any reason.
July 20 : Deadline for Interational and West Coast travel reimbursement applications.
August 14 : Deadline for Midwest and Regional travel reimbursement applications.
August 31 : General application deadline.
MedHacks 2018 is located at the Turner Auditorium in the Ross Research Building at the Johns Hopkins Medical Campus in East Baltimore, MD. The Ross Research Building is located at 720 Rutland Avenue, Baltimore, MD 21205. If you are traveling from the Homewood Campus, you can take the JHMI or special MedHacks buses to the event. If you are driving to the event, there will be parking on campus and more details will be emailed out closer to the event. If you are coming from the airport, train station, or hotel, we highly recommend you take a cab/lyft to the building. The medical campus is in the city, so please be safe when traveling to the event.
Sign into the MedHacks application portal here, and your application status, as well as the status of any other pending applications (travel reimbursements, etc), will be displayed on your profile page.
At least four members of the MedHacks executive team read each and every application made to MedHacks and decide as a group whether to offer acceptance to a applicant. All MedHacks admission decisions are final and we do not offer the reasoning behind any applicant's acceptance or rejection for any reason.
July 20 : Deadline for Interational and West Coast travel reimbursement applications.
August 14 : Deadline for Midwest and Regional travel reimbursement applications.
August 31 : General application deadline.
MedHacks 2018 is located at the Turner Auditorium in the Ross Research Building at the Johns Hopkins Medical Campus in East Baltimore, MD. The Ross Research Building is located at 720 Rutland Avenue, Baltimore, MD 21205. If you are traveling from the Homewood Campus, you can take the JHMI or special MedHacks buses to the event. If you are driving to the event, there will be parking on campus and more details will be emailed out closer to the event. If you are coming from the airport, train station, or hotel, we highly recommend you take a cab/lyft to the building. The medical campus is in the city, so please be safe when traveling to the event.
Parking will be free at the Washington Street Parking Garage, 701 N Washington St, Baltimore, MD 21205, which closes at MIDNIGHT on Friday and is open FREE of charge on Saturdays and Sundays from 7am - 7pm. As long as you enter on Friday before Midnight and leave on Sunday before 7pm, it should be completely free of charge.
Anyone is eligible to participate in MedHacks 2018, however if you’re under 18, a parent or guardian must be in the Baltimore area at all times during the event. We also do not offer travel reimbursements to minors.
If you’re a graduate student or professional, you can choose to join MedHacks either as a participant or as a mentor!
That’s more than OK! In fact, that’s encouraged! We love introducing people from all kinds of backgrounds to the world of innovation.
If you are accepted and remarked on your application that you would need a travel reimbursement, you may be invited to apply for a travel reimbursement. In that case, sign into the MedHacks application portal and follow the links for the travel reimbursement application.
Once you are accepted for a reimbursement, you must submit a VALID receipt. Guidelines for valid receipts are here.  Failure to do so will result in MedHacks’ inability to issue said reimbursement.
That’s perfectly alright! In fact, we don’t allow participants to enter with an idea they’ve been working on for a while and encourage teams to be formed during one of MedHacks’ ideation sessions.
Applications for MedHacks 2018 are open! Please sign into our application portal here.
Sign into the MedHacks application portal here, and your application status, as well as the status of any other pending applications (travel reimbursements, etc), will be displayed on your profile page.
At least four members of the MedHacks executive team read each and every application made to MedHacks and decide as a group whether to offer acceptance to a applicant. All MedHacks admission decisions are final and we do not offer the reasoning behind any applicant's acceptance or rejection for any reason.
July 20 : Deadline for Interational and West Coast travel reimbursement applications.
August 14 : Deadline for Midwest and Regional travel reimbursement applications.
August 31 : General application deadline.
MedHacks 2018 is located at the Turner Auditorium in the Ross Research Building at the Johns Hopkins Medical Campus in East Baltimore, MD. The Ross Research Building is located at 720 Rutland Avenue, Baltimore, MD 21205. If you are traveling from the Homewood Campus, you can take the JHMI or special MedHacks buses to the event. If you are driving to the event, there will be parking on campus and more details will be emailed out closer to the event. If you are coming from the airport, train station, or hotel, we highly recommend you take a cab/lyft to the building. The medical campus is in the city, so please be safe when traveling to the event.
Parking will be free at the Washington Street Parking Garage, 701 N Washington St, Baltimore, MD 21205, which closes at MIDNIGHT on Friday and is open FREE of charge on Saturdays and Sundays from 7am - 7pm. As long as you enter on Friday before Midnight and leave on Sunday before 7pm, it should be completely free of charge.
Anyone is eligible to participate in MedHacks 2018, however if you’re under 18, we ask that a parent or guardian be in the Baltimore area at all times during the event.
If you’re a graduate student or professional, you can choose to join MedHacks either as a participant or as a mentor!
That’s more than OK! In fact, that’s encouraged! We love introducing people from all kinds of backgrounds to the world of innovation.
If you are accepted and remarked on your application that you would need a travel reimbursement, you may be invited to apply for a travel reimbursement. In that case, sign into the MedHacks application portal and follow the links for the travel reimbursement application.
Once you are accepted for a reimbursement, you must submit a VALID receipt. Guidelines for valid receipts are here.  Failure to do so will result in MedHacks’ inability to issue said reimbursement.
That’s perfectly alright! In fact, we don’t allow participants to enter with an idea they’ve been working on for a while and encourage teams to be formed during one of MedHacks’ ideation sessions.


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helping you maximize your vacation by booking exciting adventures
have you ever found yourself on vacation and wanted to experience all that your vacation spot has to offer but found it too time consuming to do the research to see what is available, when it is available? you are on vacation after all, that is a pain and you are there to maximize your time on your vacation. that is what Adventure Booker is, your one stop spot to make your vacation unforgetable without the headache of all that work.
we have vetted our vendors to ensure that you have get the experince of a life time on every adventure that you book. we are tapped in directly to the vendors calendar so that you can see availablity and book directly on line, simple as that.
brian, a user
"adventure booker made it easy to book amazing once in a life time adventures while i was on vacation. i was able to log onto the site and book a day of heli-skiing and a snowmobile trip without out the hassle of looking up all the companies that offer such trips. these trips were incredibly amazing and the companies are throughly screened by adventure booker."
liz, a user
"awesome! incredible! once in a life time!! i will always use adventure booker on all of my vacations moving forward. i was able to book a day of surfing and rock climbing in five miutes from the site. these trips were incredibly amazing and the companies are throughly screened by adventure booker."
mike, a user
"adventure booker made it easy to book amazing once in a life time adventures while i was on vacation. i was able to log onto the site and book a day of heli-skiing and a snowmobile trip without out the hassle of looking up all the companies that offer such trips. these trips were incredibly amazing and the companies are throughly screened by adventure booker."
i grew up loving the outdoors and all the exciting adventures that one could have in all types of climates. my parents carted me all around the usa, from the beaches in hawaii to the snow capped rocky mountains.
a few years ago on a vacation i realized just how time consuming it was to book different outtings while i was on vacation. i was unsure what i was really getting and if the expierence that i was about to take was going to top of its class. i thought there has to be an easier way. that is how adventure booker came to be. a kick ass place to make you vacation the best that it can be.