If you are arriving by car...
From the north or south: Take I-45 to US-59 South
From the east: Take I-10 West to US-59 South
From the west: Take I-10 East to I-610 South to US-59 North
From US-59:
- Take the Greenbriar Dr/Shepherd Dr exit off of US-59 and head south onto Greenbriar.
- Make a left onto University Blvd, and you will see Rice on your left.
- Turn left onto Main Street.
- Then take a left on Cambridge St.
- This will be Entrance 3 at Rice, and you will see Lovett College on your left!
If you are arriving by plane...
From Bush Intercontinental Airport (IAH):
- Follow signs to US-59 South.
- Once on US-59, proceed south about 25 miles and take the Greenbriar Dr/Shepherd Dr exit.
- Turn left onto Greenbriar and then turn left onto University Blvd.
- Make a left onto Main Street.
- Then turn left into Entrance 3 at Cambridge St.
From Hobby Airport (HOU):
- Exit onto Broadway and follow the signs for I-45 North.
- Take I-45 North about 6 miles to US-59 South.
- Proceed about 3 miles south and then take the Greenbriar Dr/Shepherd Dr exit.
- Turn left onto Greenbriar and then turn left onto University Blvd.
- Make a left onto Main Street.
- Then turn left into Entrance 3 at Cambridge St.
SuperShuttle provides service from both airports to the Houston Plaza Hilton, the Medical Center Marriott, and the Holiday Inn on Main Street, all of which are only about five minutes from Rice. From IAH, the base fare is $29, plus $7 for each additional passenger. The ride usually takes about 45 minutes to an hour. The SuperShuttle ticket counter is located at terminals A, B, C, & D at the lower level baggage claim area. From HOU, the base fare is $23, also with an additional $7 charge for each extra passenger. The ride usually takes about 30 to 45 minutes. The SuperShuttle ticket counter is located in the baggage claim area on the lower level. Visit supershuttle.com for more information. Also be sure to use the discount code OWLS1 because this will get you a 10% discount on your fare.
Taking a taxi is a bit more expensive. From IAH to Rice via Yellow Cab the estimated base fare is around $32. From HOU to Rice it is about $50.
Finally, Uber/Lyft prices vary a lot based on how crowded it is. Typically, an Uber/Lyft from IAH costs around $30-$40 while an Uber/Lyft from HOU costs around $20-$30.
Taking a taxi is a bit more expensive. From IAH to Rice via Yellow Cab the estimated base fare is around $32. From HOU to Rice it is about $50.
Finally, Uber/Lyft prices vary a lot based on how crowded it is. Typically, an Uber/Lyft from IAH costs around $30-$40 while an Uber/Lyft from HOU costs around $20-$30.
MOVE-IN DAY INFO
MOVE-IN TIMES
Be sure to check your e-mail for your assigned move-in time as it gets closer to move-in day. It is important that you show up at this time so that move-in day can run smoothly!
Move-in day will be 08/12/2018 at Entrance 3, located at the intersection of Main and Cambridge. See the map below.


Class: Aws::S3::Types::AnalyticsConfiguration
| Relationships & Source Files | |
| Super Chains via Extension / Inclusion / Inheritance | |
|
Class Chain:
self,
Struct
|
|
|
Instance Chain:
self,
::Aws::Structure ,
Struct
|
|
| Inherits: |
Struct
|
| Defined in: | gems/aws-sdk-s3/lib/aws-sdk-s3/types.rb |
Overview
Specifies the configuration and any analyses for the analytics filter of an Amazon S3 bucket.
Constant Summary
-
SENSITIVE =
# File 'gems/aws-sdk-s3/lib/aws-sdk-s3/types.rb', line 222[]
Instance Attribute Summary
-
#filter ⇒ Types::AnalyticsFilter
rw
The filter used to describe a set of objects for analyses.
-
#id ⇒ String
rw
The ID that identifies the analytics configuration.
-
#storage_class_analysis ⇒ Types::StorageClassAnalysis
rw
Contains data related to access patterns to be collected and made available to analyze the tradeoffs between different storage classes.
Instance Method Summary
::Aws::Structure
- Included
| #to_hash | Alias for Aws::Structure#to_h. |
Instance Attribute Details
#filter ⇒ Types::AnalyticsFilter (rw)
The filter used to describe a set of objects for analyses. A filter must have exactly one prefix, one tag, or one conjunction (AnalyticsAndOperator). If no filter is provided, all objects will be considered in any analysis.
# File 'gems/aws-sdk-s3/lib/aws-sdk-s3/types.rb', line 218
class AnalyticsConfiguration < Struct.new( :id, :filter, :storage_class_analysis) SENSITIVE = [] include Aws::Structure end
#id ⇒ String
(rw)
The ID that identifies the analytics configuration.
# File 'gems/aws-sdk-s3/lib/aws-sdk-s3/types.rb', line 218
class AnalyticsConfiguration < Struct.new( :id, :filter, :storage_class_analysis) SENSITIVE = [] include Aws::Structure end
#storage_class_analysis ⇒ Types::StorageClassAnalysis (rw)
Contains data related to access patterns to be collected and made available to analyze the tradeoffs between different storage classes.


Connecting MongoDB from Heroku free tier
Heroku out of the box provide a simple way to spin MongoDB instances, and automatically configures it to your running application:
$ heroku addons:create mongolab
A good tutorial on this topic is https://devcenter.heroku.com/articles/mean-apps-restful-api#provision-a-mongodb-database
However, when running the command in the free tier, it will ask you validate a credit card in their site to verify your account:
$ heroku addons:create mongolab
Creating mongolab on ⬢ radiant-lowlands-14472... !
▸ Please verify your account to install this add-on plan (please enter a credit card) For more information, see https://devcenter.heroku.com/categories/billing Verify now
▸ at https://heroku.com/verify
Configuring MongoDB
Luckily, MongoDB has Atlas offering a free tier as well and we could connect to it from Heroku following these steps:
- Register into MongoDB site
- Select Shared Cluster offering for the free tier
- Select the region to deploy the cluster. It might be a good idea to have in consideration the region your heroku is running to match it.
- MongoDB will take several minutos to provision the cluster
- Once provisioned it will look like below, and click Connect:
- On whitelist, it asks for the IP ranges to allow connectivity from the remote client, in this case Heroku. Not sure if Heroku publish this, but you could select <IP_ADDRESS>/0. This will enable connectivity from any source.
- For the user, fill your desired username and password
- Move to the next page by clicking “Choose a connection method”
- Select “Connect your application”
- Copy the URL and Close the dialog
You’ll have something like
mongodb+srv://user:<password>@cluster0-cmmbk.mongodb.net/<dbname>?retryWrites=true&w=majority
Replace password, and dbname use “test”:
mongodb+srv://user:password@cluster0-cmmbk.mongodb.net/test?retryWrites=true&w=majority
Configuring Heroku to connect to MongoDB
If you get below output when executing an heroku command:
› Error: Missing required flag: › -a, --app APP app to run command against › See more help with --help
Execute the command with the app name as part of the heroku command with -a modifier. For example:
$ heroku apps ==<EMAIL_ADDRESS>Apps radiant-lowlands-14321 $ heroku ps -a radiant-lowlands-14321
Now the DB is ready to receive connections. Go to your local heroku app folder and generate this config env var:
$ heroku config:set MONGODB_URI="mongodb+srv://user:password@cluster0-cmmbk.mongodb.net/test?retryWrites=true&w=majority"
If you need a simple unit test, use this server.js:
const db = process.env.MONGODB_URI;
const connectDB = async () => {
try {
await mongoose.connect(db, {
useUnifiedTopology: true,
useNewUrlParser: true
});
console.log("MongoDB is Connected...");
} catch (err) {
console.error(err.message);
process.exit(1);
}
};
Commit and push it as usual and in the logs of the app should read:
2020-06-05T00:10:30.017396+00:00 app[web.1]: Database connection ready


UEFI : Creating a x86_64 Simple UEFI Application
Introduction
In this Article, We are going to make a Simple x86_64 UEFI Application, that is able to print a text on screen and can be safely tested on a Real Hardware. We are going to make a simple application that use GNU-EFI as a bootloader, that supports x86 and 64 bit Architectures. We will be first Setup GNU-EFI bootloader. Then, We Configure Makefile, after that we will code a simple application in C, that can print texts. Then we can test it in our own PC. However, you want to grab the only source code instead of reading this blog, you can click the "Get Source Code" link.
Setting UP GNU-EFI
First Grab the Source Code of GNU-EFI from this Here (We are using GNU-EFI 3.0.13 - Which is Latest Now ). After Grabbing the source code extract it in your Main Project Root directory.
Open your Terminal, Change directory to your gnu-efi directory in your Main Project Root Directory, then Run make This will compile the raw library files.
Then, We need to make a build rule to compile our code, That is Very Simple, Open your Main Project directory with your Favoirite code editor, then Open "gnu-efi-3.0.13/Makefile".
On Line 45-47, you can see a SUBDIRS container, Replace that line with SUBDIRS = lib gnuefi inc apps boot We added one more value here that is "boot", this is the name of directory that consists our main Application code.
Then Create a "boot" named directory in gnu-efi-3.0.13 directory.
Code Time
That's All we are now going to code a very basic "Hello Universe" Application.
So, First of All, Create a new file "main.c" in "boot" directory and following code.
Above code is decribed by comments. This application will exit when any Keyboard Input.
We are completed our Hello Universe Code. Let's make rules to compile it.
Write Rules to Compile
Now, we have to make a rule to compile the our C files. If you know about Makefile, you can understand following script.
First Create Makefile in gnu-efi-3.0.13/boot/ directory. And copy the following script :
Note : Above code is not written by me, All Information is given in Top of file.
I am not going to explain this script, I can say only that This script set the rules for compiling C files to Object files or in other file formats.
Now we done, We can compile our code. To compile, First Change directory to main gnu-efi directory in terminal, then run make bootloader , This will compile the code and build our bootloader as efi file. You can see that file in the Project/gnu-efi/x86_64/boot directory. That is our bootloader.
Test It
Take a Pen drive, and make a directory named efi/boot/, then copy that main.efi file to that boot directory, and rename that file as bootx64.efi , That's all we have finished, now you can boot your Own UEFI Application.
Congratulations, It's now Completed.
Source Code
You can download the source code from this link.
Next Blog is Coming soon.


What is Frano?
Frano strives to provide an accurate and understandable analysis of your portfolio, with the ability to import data from your broker's data files.
Frano strives to provide an accurate and understandable analysis of your portfolio, with the ability to import data from your broker's data files.
Is it for me?
Frano serves a variety of users, from those wishing to take a simple quick glance at how they are doing to users who wish a deep analysis of their holdings and allocations.
Frano serves a variety of users, from those wishing to take a simple quick glance at how they are doing to users who wish a deep analysis of their holdings and allocations.
Getting started.
Here is a sample portfolio for you to play around with. It is valid for the current session. If you wish to track your own portlios, simply sign in and enter your data.
Here is a sample portfolio for you to play around with. It is valid for the current session. If you wish to track your own portlios, simply sign in and enter your data.
- Risk Capital Profit Loss
- ${{ summary.risk_capital_pl|num_format }}
| Symbol | Allocation | Qty | Price | Cost Price | Market Value | Day's P/L $ | Day's P/L % | Unreal. P/L $ | Unreal. P/L % | ||||||||||||||||||||||||||||||||||
|
{% ifequal position.symbol '*CASH' %}
{{ position.symbol }}
{% else %}
{{ position.symbol }}
{% endifequal %}
{% ifequal position.price 0 %}
Unknown symbol
{% endifequal %}
|
{{ position.allocation|floatformat:'2' }}% | {{ position.quantity|num_format:"4" }} | ${{ position.price|num_format }} | ${{ position.cost_price|num_format }} | ${{ position.market_value|num_format }} | ${{ position.day_pl|num_format }} | {{ position.day_pl_percent|floatformat:2 }}% | ${{ position.pl|num_format }} | {{ position.pl_percent|floatformat:2 }}% | {% ifnotequal position.lots|length 0 %} more... {% else %} {% endifnotequal %} | |||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||
| {% ifequal request.GET.showClosedPositions "true" %} Hide closed positions {% else %} See all positions (even closed ones) {% endifequal %} |


MachineryMPTI can solve Machinery Problems but cannot solve all the buildingMPTI problems.
You have a problem in your Building, Office or Construction due to external factors and you wanted to monitor whether it is within the permissible limits?
Yes we do have a SOLUTION for your problems.
We are also the Indian Representatives of VIBRAQUIPO, S.L.U., Spain who are one of the best Manufacturers of GROUND, BUILDING AND BLASTINGMPTI INSTRUMENTS.
A 4/7 channel, low frequency groundMPTI (seismic) measuring instrument with an extremely accurateMPTI recording with sample rate of 2048 SPS with frequency range either 1-315 Hz or 2-250 Hz with automatic trigger level capable of storing up-to 6000 records. The best in class building and groundMPTI instrument which follows DIN 4150 standard.
A 3 channel, low frequency groundMPTI (seismic) measuring instrument with an extremely accurateMPTI recording with sample rate of 2048 SPS with frequency range either 1-315 Hz or 2-250 Hz with automatic trigger level capable of storing up-to 500 records. The best in class building and groundMPTI instrument which follows DIN 4150 standard.


Enter a date, find upcoming holiday.
Limited to prior year (freeware api).
Rationale: To get an AJAX api going in the real world: reinforcing skills learned in two walk-through AJAX practices.
API selected from Github. Sadly, the free version mean-spiritedly only shows last year's info. So I limited the html input to last year.


| No. | Company Code | Company Name | Created Date | Created By | Action |
|---|---|---|---|---|---|
| {{i+1}} | {{company.code}} | {{company.name}} | {{company.createdDate | date : "medium" }} | {{company.createdBy}} |
Edit CompanyDelete CompanyAre you sure to delete this? |


This Is Heavy
Does your mom know about tomorrow night? Good morning, Mom. Oh, Marty, I almost forgot, Jennifer Parker called. He's alright.  The old man really came through it worked. I have to tell you about the future.
He's absolutely right, Marty. the last thing you need is headaches. Well, I guess that's everything. Please note that Einstein's clock is in complete synchronization with my control watch. Good evening, I'm Doctor Emmet Brown, I'm standing here on the parking lot of- What did you sleep in your clothes again last night.
Precisely. George, aren't you gonna kiss me? Hey beat it, spook, this don't concern you.  Here you go, lady. There's a quarter.


Pseudo Wire Reference |
The menu bar is located at the top of the screen. The menu bar has eight items that can be selected:
New clears the game of all components, leaving the user a clean slate to build a new creation.
Save allows the user to save their workspace to a file.
Load allows the user to open saved workspaces and continue working on them or interact with them.
Edit / Game Mode is a toggleable item on the Menu bar. During Edit Mode, the user can build and edit their components. Edit Mode displays an icon beside the mouse to ensure the user knows they are in Edit Mode. During Game Mode, the user has full interaction with the components. All tools are disabled in Game Mode.
Show Grid / Remove Grid is a toggleable item in the Menu Bar. When enabled, a "snap-to" grid will appear on the game workspace. Use the accompanying Up and Down buttons can grow or shrink the grid size.
Enable / Disable Battery Saver is a toggleable item in the Menu Bar. When enabled, the game will give slack to the CPU, allowing a longer battery life on laptops. However, this will drop performance.
About displays Pseudo Wire information, such as Authors and Version.
Exit will quit the game. Any unsaved progress will be lost.
The spawn list (or spawn menu) is a tree of all the different components you can build and use.
You can access this menu by Right-Clicking on an empty space in the game during Edit Mode.
When you first open the menu, you'll see all the different categories you can expand.
Categories are used to group like-components. Categories are items with the or icons beside them.
Use the scroll wheel or arrow keys to scroll up and down the list.
For example, if you click on the Math
category, you'll see math-related components, such as Add
, Subtact
, Absolute
, Round
, Negate
, and so on.
You may click on a component to spawn it.
The context menu contains all component editing tools.
You can access this menu by Right-Clicking on the component you wish to edit during Edit Mode.
When you first open the context menu, you have many different options:
Wire Input is used to connect (or "wire") an input of this component to an output of another component. Choosing this will open another menu with all the inputs of the component you wish to connect to. After selecting an input, right click on the other component you want to connect to, and click on an available output.
Wire Output is much like the above. It is used to connect (or "wire") an output of this component to an input of another component. If you have played with Wiremod, this will probably be your prefered method of wiring.
Edit will bring up a dialog window that may give you options to edit how the component functions. However, not all components are customizable and choosing this will perform no action.
Unwire Input is used to remove the connection on an input. Clicking this will bring up a list of inputs to choose from.
Unwire Output is used to remove all connections on an output. Clicking this will bring up a list of outputs to choose from.
Remove is used to delete a component from the game. Clicking this will first remove any connections, then delete the component.

Enter your filename into the textbox (the .pwm extension is not required) and hit the Accept button at the top right (green.) This will create a .pwm (Pseudo Wire Machine) save file which will be stored in your saves
folder.
To cancel the saving window, hit the Cancel button at the top right (red.)
If "Save output values" is checked, the game will save the values of all component outputs and will be reloaded in game load. This feature is rarely used and not needed. This will also increase the save file's size.
The loading window allows you to load progress that was previously saved.
Click on the file that you wish to load and click the Accept button at the top right (green.)
To cancel the loading window, hit the Cancel button at the top right (red.)
You may use the scroll wheel or arrow keys to scroll up and down.
The loading window explores the saves
folder, where all save files should be located.
The edit window allows you to modify the component and how it behaves. Not all components will have this feature.
To submit new settings, hit the Accept button (green.)
To cancel new settings, hit the Cancel button (red.)


A bot that automatically calculates and submits answers for Quizlet Live. For... educational purposes only... obviously...
Drag this to your bookmarks bar: Quizlet Bot
After you enter the code for a quizlet live game, but before it starts, click the bookmark to load the bot.
To enable/disable arc, drag this to your bookmarks bar and click it: Toggle Arc
Install the userscript manager for your browser:
After you've installed the extension, go to the userscript source here and click install.


class: center, middle, inverse, title-slide # ETC3250: Support vector machines ## Semester 1, 2019 ###
Professor Di Cook
Econometrics and Business Statistics
Monash University ### Week 7 (b) --- class: split-30 layout: false .column[.pad10px[ ## Outline - .green[Separating hyperplane] ]] .column[.top50px[ In a `\(p\)`-dimensional space, a .orange[hyperplane] is a flat affine subspace of dimension `\(p - 1\)`.    ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - .green[Separating hyperplane] ]] .column[.top50px[ The equation of `\(p\)`-dimensional hyperplane is given by `$$\beta_0 + \beta_1 X_1 + \dots + \beta_p X_p = 0$$` If `\(x_i \in \Re^p\)` and `\(y_i \in \{-1, 1\}\)` for `\(i = 1, \dots, n\)`, then `$$\beta_0 + \beta_1 x_{i1} + \dots + \beta_p x_{ip} > 0 \mbox{ if } y_i = 1,$$` `$$\beta_0 + \beta_1 x_{i1} + \dots + \beta_p x_{ip} < 0 \mbox{ if } y_i = -1$$` Equivalently, `$$y_i (\beta_0 + \beta_1 x_{i1} + \dots + \beta_p x_{ip}) > 0$$` ]] --- class: split-30 layout: true .column[.pad10px[ ## Outline - .green[Separating hyperplane] ]] .column[.top50px[ .row[.content[ - A new observation is assigned a class depending on .orange[which side] of the hyperplane it is located - Classify the test observation `\(x^*\)` based on the .orange[sign] of `$$s(x^*) = \beta_0 + \beta_1 x_1^* + \dots + \beta_p x_p^*$$` - If `\(s(x^*) > 0\)`, class `\(1\)`, and if `\(s(x^*) < 0\)`, class `\(-1\)`, i.e. `\(h(x^*) = \mbox{sign}(s(x^*)).\)` What about the .orange[magnitude] of `\(s(x^*)\)`? ]] .row[.content[ - `\(s(x^*) \mbox{ far from zero } \rightarrow\)` `\(x^*\)` lies far from the hyperplane + **more confident** about our classification - `\(s(x^*) \mbox{ close to zero } \rightarrow\)` `\(x^*\)` near the hyperplane + **less confident** about our classification ]] ]] --- class: fade-row2 count: false --- count: false --- class: split-30 layout: true .column[.pad10px[ ## Outline - Separating hyperplane - .green[LDA to SVM] ]] .column[.top50px[ .row[.content[ - Linear discriminant analysis uses the difference between means to set the separating hyperplane. - Support vector machines uses .orange[gaps] between points on the outer edge of clusters to set the separating hyperplane. ]] .row[.content[  ]] ]] --- class: fade-row2 count: false --- count: false --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - .green[Maximal margin classifier] ]] .column[.top50px[ All are separating hyperplanes. .orange[Which is best?] ![separating hyperplanes](images/svm1.png) ![separating hyperplanes](images/svm2.png) ![separating hyperplanes](images/svm3.png) ![separating hyperplanes](images/svm4.png) ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - .green[Maximal margin classifier] ]] .column[.top50px[  ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - .green[Maximal margin classifier] - Support vectors - Non-separable case - Nonlinear boundaries - Kernel trick - SVM vs Logistic regression ]] .column[.top50px[ - If our data can be perfectly separated using a hyperplane, then there will in fact exist an **infinite number of such hyperplanes**. - We compute the (perpendicular) distance from each training observation to a given separating hyperplane. The .orange[smallest] such distance is known as the .orange[margin]. - The .orange[optimal separating hyperplane] (or maximal margin hyperplane) is the separating hyperplane for which the margin is .orange[largest]. - We can then classify a test observation based on which side of the maximal margin hyperplane it lies. This is known as the .orange[maximal margin classifier]. ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - Maximal margin classifier - .green[Support vectors] ]] .column[.top50px[  ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - Maximal margin - .green[Support vectors] ]] .column[.top50px[ - The .orange[support vectors] are equidistant from the maximal margin hyperplane and lie along the dashed lines indicating the width of the margin. - They .orange[support] the maximal margin hyperplane in the sense that if these points were moved slightly then the maximal margin hyperplane would move as well - The maximal margin hyperplane depends directly on the support vectors, but .orange[not on the other observations] ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - Maximal margin - .green[Support vectors] ]] .column[.top50px[ Example: Support vectors (and slack vectors)  ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - Maximal margin - Support vectors - .green[Maximal margin classifier] ]] .column[.top50px[ If `\(x_i \in \Re^p\)` and `\(y_i \in \{-1, 1\}\)` for `\(i = 1, \dots, n\)`, the separating hyperplane is defined as `$$\{x:b_0+x'b=0\}$$` where `\(b=\sum_{i=1}^s (\alpha_iy_i)x_i\)` and `\(s\)` is the number of support vectors. Then the .orange[maximal margin hyperplane] is found by *maximising* `\(M\)`, subject to `\(\sum_{i=1}^pb_i^2=1\)`, and `\(y_i(x_i'b+b_0)\geq M, i=1, ..., n\)`. ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - Maximal margin - Support vectors - Maximal margin classifier - .green[Non-separable case] ]] .column[.top50px[ .orange[Soft margin classifier] *maximising* `\(M\)`, subject to `\(\sum_{i=1}^pb_i^2=1\)`, and `\(y_i(x_i'b+b_0)\geq M(1-\epsilon_i), i=1, ..., n\)`, AND `\(\epsilon_i\geq 0, \sum_{i=1}^n\epsilon_i\leq C\)`.    ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - Maximal margin - Support vectors - Maximal margin classifier - .green[Non-separable case] ]] .column[.top50px[ .orange[Soft margin classifier] *maximising* `\(M\)`, subject to `\(\sum_{i=1}^pb_i^2=1\)`, and `\(y_i(x_i'b+b_0)\geq M(1-\epsilon_i), i=1, ..., n\)`, AND `\(\epsilon_i\geq 0, \sum_{i=1}^n\epsilon_i\leq C\)`. `\(\varepsilon_i\)` tells us where the `\(i\)`th observation is located and `\(C\)` is a nonnegative .orange[tuning parameter]. - `\(\varepsilon_i = 0\)`: correct side of the margin, - `\(\varepsilon_i > 0\)`: wrong side of the margin (violation of the margin), - `\(\varepsilon_i > 1\)`: wrong side of the hyperplane. ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - Maximal margin - Support vectors - Maximal margin classifier - .green[Non-separable case] ]] .column[.top50px[ .orange[Tuning parameter]: decreasing the value of *C*    ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - Maximal margin - Support vectors - Maximal margin classifier - Non-separable case - .green[Nonlinear boundaries] ]] .column[.top50px[ .orange[Polynomial] and .orange[radial] SVMs    ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - Maximal margin - Support vectors - Maximal margin classifier - Non-separable case - .green[Nonlinear boundaries] ]] .column[.top50px[ .orange[the kernel trick] Because `\(b=\sum_{i=1}^s (\alpha_iy_i)x_i\)` `\(y_i(x_i'b+b_o)\)` can be written as `$$y_i(\alpha_i x_i'x_i+b_o)$$` and `\(x_i'x_i\)` can be wrapped into a kernel function `\(K(x_i'x_i)\)` which enables building nonlinear boundaries.  ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - Maximal margin - Support vectors - Maximal margin classifier - Non-separable case - .green[Nonlinear boundaries] ]] .column[.top50px[ Italian olive oils: Regions 2, 3 (North and Sardinia)  ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - Maximal margin - Support vectors - Maximal margin classifier - Non-separable case - Nonlinear boundaries - .green[High dimensions] ]] .column[.top50px[ Examining misclassifications and which points are selected to be support vectors <video width="700" controls> <source src="http://www.ggobi.org/book/chap-class/SVM.mov"> </video> ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - Maximal margin - Support vectors - Maximal margin classifier - Non-separable case - Nonlinear boundaries - .green[High dimensions] ]] .column[.top50px[ [Examining boundaries](http://www.ggobi.org/book/chap-class/classifly.mov) <video width="700" controls> <source src="http://www.ggobi.org/book/chap-class/classifly.mov"> </video> ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - Maximal margin - Support vectors - Maximal margin classifier - Non-separable case - Nonlinear boundaries - .green[High dimensions] ]] .column[.top50px[ [Boundaries of a radial kernel in 3D](https://vimeo.com/125405961) <video width="700" controls> <source src="https://vimeo.com/125405961"> </video> ]] --- class: split-30 layout: false .column[.pad10px[ ## Outline - Separating hyperplane - LDA to SVM - Maximal margin - Support vectors - Maximal margin classifier - Non-separable case - Nonlinear boundaries - .green[High dimensions] ]] .column[.top50px[ [Boundaries of a polynomial kernel in 5D](https://vimeo.com/125405962) <video width="700" controls> <source src="https://vimeo.com/125405962"> </video> ]] --- layout: false # 👩💻 Made by a human with a computer ### Slides at [https://monba.dicook.org](https://monba.dicook.org). ### Code and data at [https://github.com/dicook/Business_Analytics](https://github.com/dicook/Business_Analytics).
 ### Created using [R Markdown](https://rmarkdown.rstudio.com) with flair by [**xaringan**](https://github.com/yihui/xaringan), and [**kunoichi** (female ninja) style](https://github.com/emitanaka/ninja-theme).

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.


$def with (plaso_url, jenkins_url, for572_url, xplico_url) The following dashboards are available (and will open in a new browser tab/window):


Resume
EDUCATION AND SKILLS
Macalester College, St. Paul, MN
Bachelor degree May, 2020
Major: Computer Science
Minor: Data Science/Data Driven Journalism
GPA: 3.89
Major: Computer Science
Minor: Data Science/Data Driven Journalism
GPA: 3.89
Programming Skills and Languages
|
OOP Machine Learning Data Modeling Data Visualization Data Analytics DBMS |
Python Java R SQL Ruby Swift |
English (Native) Spanish (Fluent) Portuguese (Fluent) French (Basic) |
Relevant Courses
|
Algorithm Design/Analysis Core Concepts in Computer Science Object Oriented Programming and Data Structures Software Design and Development Programming Languages Theory of Computation Computer Systems Organization Interactive Computer Graphics |
Statistical Modeling Introduction to Database Management Systems Discrete Mathematics Statistical Machine Learning Data Storytelling Causal Inference |
INTERNSHIPS
Product Data Intern, Cancer IQ
June - August, 2019
● Wrote a script to parse customer data and automate customer reports
● Analyzed accuracy of patient medical self-reports to target survey modifications that would lead to higher accuracy
● Completed ad hoc data requests from customers
● Wrote a script to parse customer data and automate customer reports
● Analyzed accuracy of patient medical self-reports to target survey modifications that would lead to higher accuracy
● Completed ad hoc data requests from customers
Data Science Intern, Pangea Money Transfer
May - July, 2018
● Used software such as RStudio, Snowflake, and MySQL
● Created an RFM model of the user-base
● Analyzed user activity to provide insight on business decisions
● Used software such as RStudio, Snowflake, and MySQL
● Created an RFM model of the user-base
● Analyzed user activity to provide insight on business decisions
Immigrant Legal Defense Project Intern, National Immigrant Justice Center
May - July, 2017
● Audited immigration case files
● Prepared visa packets to be submitted for U-Visa applicants
● Attended meetings, conferences, and information sessions about immigration law
● Audited immigration case files
● Prepared visa packets to be submitted for U-Visa applicants
● Attended meetings, conferences, and information sessions about immigration law
WORK EXPERIENCE
Co-Founder and Co-Chair, Naming Hate Symposium
Fall, 2018 - Present
● Created a 3-day symposium featuring expert panels and speakers as well as workshops in response to a rise of antisemitism and racism on Macalester’s campus
● Received the Coalition for Liberation award from the Department of Multicultural life for collaboration with the President, the Center for Religious and Spiritual Life, the Title IX office, and others.
● Created a 3-day symposium featuring expert panels and speakers as well as workshops in response to a rise of antisemitism and racism on Macalester’s campus
● Received the Coalition for Liberation award from the Department of Multicultural life for collaboration with the President, the Center for Religious and Spiritual Life, the Title IX office, and others.
Shift Supervisor, Caribou Coffee
November, 2016 - Present
Portuguese Lab Instructor, Macalester College
September, 2018 - December, 2019
● Teach required supplemental classes on Portuguese grammar
● Hold office hours for Portuguese students
● Teach required supplemental classes on Portuguese grammar
● Hold office hours for Portuguese students
Small Business Owner and Manager, The Kelson Twins Band
2012 - 2020
● Product Creation: Created T-shirts, tote bags, tank tops, and stickers for the band
● Sales & Marketing: Marketed and sold products online and at venues. Promoted and booked the band in multiple cities including Chicago, Nashville, and Appleton
● Fundraising: Raised over $10,000 through crowdfunding to produce and distribute an album
● Bookkeeping & Administration: Responsible for financial and day-to-day operations
● Product Creation: Created T-shirts, tote bags, tank tops, and stickers for the band
● Sales & Marketing: Marketed and sold products online and at venues. Promoted and booked the band in multiple cities including Chicago, Nashville, and Appleton
● Fundraising: Raised over $10,000 through crowdfunding to produce and distribute an album
● Bookkeeping & Administration: Responsible for financial and day-to-day operations


Add some information about the album below, the author, or any other background
context. Make it a few sentences long so folks can pick up some informative tidbits. Then, link them off
to some social networking sites or contact information.
Lorem, ipsum dolor sit amet consectetur adipisicing elit. Quaerat ex quasi, corrupti
accusamus possimus earum cupiditate, alias quibusdam iste quis unde labore! Iste officia corporis sequi ab
iure, dicta eaque!
Last updated 3 mins ago
Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim
keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.


Schindler's List (1993)
Grade: 97
Universally acclaimed as one of the best films ever made, "Schindler's List" lives up to its reputation. Far different from director Steven Spielberg's previous films, "Schindler's List" is never manipulative or ponderous, and except for the stone-laying ceremony at film's end, bears its 197-minute length exceptionally well. Filmed in glorious black and white, and with outstanding direction and dialogue, the film is nearly perfect. Most surprising is the casting: no mega-stars appear in the film, particularly in the female roles. Casting is done to match the character, and not to increase box office receipts.
The film takes place in Germany-occupied Poland, during World War II. Polish Jews are forced to relocate from the countryside to the large cities, then packed into a walled-off ghetto, exploited as slave labor, and finally forced into concentration camps. The Jews lose first their property, then their freedom, then their lives. What is most chilling about the genocide is the ruthless efficiency in which it is performed: each person is continually placed onto one of two lists; one marked for immediate death, the other for death postponed. The significance of the film's title is that this list has an opposite purpose. It is a list to rescue its members from near-certain death.
While the plight of the Jews serves as the film's context, a German Gentile is its central character. Oskar Schindler (Liam Neeson) is initially a conceited, manipulative womanizer, whose cynical goal is to make a fortune during the war using Jewish slave labor. His first employee is taciturn, brilliant accountant Itzhak Stern (Ben Kingsley), who sees Schindler's factory as an opportunity to save Jews from extinction in concentration camps. Stern's task is made more difficult by determined, murderous stormtroopers led by Amon Goeth (Ralph Fiennes). Schindler is slowly converted from capitalist to humanitarian, by film's end risking his life and giving up his fortune to save Jewish lives. Neeson's flexibility as an actor is impressive. His character is always evolving, yet always convincing. Although perhaps becoming too saintly: "Schindler's List" is a dramatization more than it is a documentary.
"Schindler's List" won seven Academy Awards, including those for Best Picture, Best Director, Best Cinematography (Janusz Kaminski), Best Film Editing (Michael Kahn), Best Score (credited to John Williams, but featuring violinist Itzhak Perlman), Best adapted screenplay (Steven Zaillian). Neeson and Fiennes were nominated for Best Actor and Best Supporting Actor, respectively.
<EMAIL_ADDRESS>http://members.tripod.com/~Brian_Koller/movies.html
The review above was posted to the
rec.arts.movies.reviews newsgroup (de.rec.film.kritiken for German reviews).
The Internet Movie Database accepts no responsibility for the contents of the
review and has no editorial control. Unless stated otherwise, the copyright
belongs to the author.
Please direct comments/criticisms of the review to relevant newsgroups.
Broken URLs inthe reviews are the responsibility of the author.
The formatting of the review is likely to differ from the original due
to ASCII to HTML conversion.
Related links: index of all rec.arts.movies.reviews reviews


Nanoarchitectonics
From Wikipedia, the free encyclopedia
Nanoarchitectonics in biology: self-assembly of lipids (a), proteins (b), and (c) SDS-cyclodextrin complexes.
SDS is a surfactant with a hydrocarbon tail (yellow) and a SO4 head (blue and red), while cyclodextrin is a
saccharide ring (green C and red O atoms).
Nanoarchitectonics in chemistry: transmembrane chloride channel formed by self-assembly of fumaramides
Nanoarchitectonics is a technology allowing to arrange nano-sized structural units, usually a group of atoms or
molecules, in an intended configuration. It employs two major processes: nano-creation and nano-organization.
Nano-organization involves re-arrangement of the structural units in a desired pattern, while nano-creation is
synthesis of new materials that do not exist in nature. For example, by peeling atomic sheets off graphite slab,
a novel nano-material graphene can be obtained, which has very different properties from graphite.
Nanoarchitectonics is not limited to nano-creation and nano-organization, but rather employs those techniques to
understand and use the ultimate functions of materials. The important technologies to achieve this goal involve
manipulation of single atoms and molecules through physical interactions, chemical reactions, applied fields, or
self-assembly.


We have all tried the probably most frustrating thing....
Going to a webpage on our smart phone and the webpage is not optimized for mobiles at all!
Having to zoom in all the way in order to read the text or simply click a button is painful...
Therefore I have decided to research this a bit further and optimize this webpage for mobiles!


Stump Removal
问题描述 :
FJ will use the traditional high explosives to destroy the stumps. These high explosives are formulated to destroy adjacent stumps as long as those adjacent stumps are strictly shorter than the nearest stump being destroyed. The blast can continue past the closest adjacent stump to the next adjacent stump if it is even shorter than the nearest stump just destroyed. As soon as a stump encountered by the blast wave is not shorter, though, no more destruction occurs on that side of the target stump (the other side follows the same rules with whatever stumps might appear there).
Consider a line of nine stumps with these heights:
1 2 5 4 3 3 6 6 2
If FJ blows up the third stump (with height 5), then the second stump will also be destroyed (height 2) and the first stump (height 1) will also be destroyed. Likewise, the fourth stump (height 4) and fifth stump (height 3) will be destroyed since they are successively shorter, leaving the line like this:
* * * * * 3 6 6 2
Two more explosives (at stumps 7 and 8) will destroy the rest.
Help FJ determine the minimum number of explosive charges he needs to destroy the stumps.
输入:
Lines 2..N+1: Line i+1 contains H_i
输出:
样例输入:
9 1 2 5 4 3 3 6 6 2
样例输出:
3 7 8
解题代码:
/* @author: */ import java.util.Scanner; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; public class Main{ static final int MAX=50001; public static void main(String args[]) throws IOException{ BufferedReader buff = new BufferedReader(new InputStreamReader(System.in)); // Scanner sc = new Scanner (System.in);//这样居然超时 int h[]=new int[MAX]; int max=0; int result[]=new int[MAX]; int j=0; int n=Integer.parseInt(buff.readLine()); //int n=sc.nextInt(); for(int i=0;i< n;i++) h[i]=Integer.parseInt(buff.readLine()); // h[i]=sc.nextInt(); max=h[0]; if(h[0]>h[1]) result[j++]=1;//处理序列的第一个数 for(int i=1;i< n;i++){//依次处理序列的其它各项 if(h[i]>=max&&h[i+1]<=h[i]){ max=h[i]; result[j++]=i+1;//记录满足条件的项的下标. } else max=h[i]; } for(int m=0;m< j;m++) System.out.printf("%d\n",result[m]); } }
int L[m+1][n+1];这样定义出错，这个在gcc上可以编译通过 在VS上不行 应该改为new 或者vector
[…] 如果此题没有要求 相对位置不变，可以参考文章：http://www.acmerblog.com/interview-9-2427/ […]
[…] 答案：http://www.acmerblog.com/interview-2-1549/ […]
对于输出格式不用控制？？还是直接使用cout输出。？？
面霸网。www.51mx.org
楼主你能把scanf( "%d%*" ,&T );中%*的用法详细说明吗
C语言版本的代码好像有点问题
惊艳了，没想到代码如此简洁
很好的方法，学习了
后面的是python代码啊
为什么不直接用STL排序呢？
多谢支持！
刚开始学习，为啥会报错了


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{% extends "layout.html" %} {% block body %}
Examples - HPO: HP:0000639, Gene: PCSK9, Transcript: ENST00000407236, Variant: 22-38212762-A-G, Multi-allelic variant: rs1800234, Region: 22:46615715-46615880
The UCL exomes consortium (UCLex) is a coalition of investigators seeking to aggregate and harmonize exome sequencing data and phenotypes.
The current release of UCLex contains {{ total_variants }} variants seen in {{ total_patients }} patients sequenced as part of various disease-specific genetic studies. The Principal Investigators and groups that have contributed data to the current release are listed here.


Why choose our landscaping company? Because, we take a personal interest in each landscaping job to ensure top quality results. To us, no job is the same. Landscapes come in all different shapes and sizes, so we always come prepared with the latest lawn care or land clearing equipment. For 20 years we have worked hard to produce the best lawn maintenance company in Putnam County, FL. Our main goal is to provide lawn care and land clearing services at an affordable rate with top quality results!
Get in contact with us Today!
Founded in 1999, Mullis Lawn Maintenance has been providing exceptional service to Putnam County residents for over 20 years. Our humble beginnings combined with customer satisfaction has grown our business from a small lawn cutting service to the ever expanding business we operate today.
Whether you’re looking for a dependable, affordable monthly lawn service, or you have acres that need mowing, we can serve your needs. Our land clearing services can take a wooded lot and selectively clear it to be the functional property you deserve. We will come completely self contained and prepared to haul off all debris should you choose. Our equipment is up to date and well-maintained ensuring you timely, quality service.
In addition to cutting grass, bush-hogging and clearing ditches, we
can also haul away that concrete drive, remove that tree (stump and
all), dig post holes, trenching and much more.
Give us a call today to get an estimate, big or small, on any of
your outdoor needs.
Sincerely,
Casey Mullis
Here at Mullis Lawn Maintenance, we provide a wide range of lawn care services. If residential lawn care is what you are looking for, we can take care of it! Maybe you are here as a business owner, and commercial lawn care is the service you are seeking. do not worry! We have you covered there as well. With up to date equipment that is well maintained for quality, no job is to big. Whether we are loading the zero turn lawn mowers on to the trailer or hooking up the bush hog, we here at Mullis Lawn Maintenance go to work with professionalism and quality in mind. Look no further and get in contact with us today to schedule a quote! We look forward to hearing from you.
Land clearing is an essential early step to any construction project. Choosing the right land clearing company, gives you the landowner a restful mind, in knowing your landscaping needs will be handled in a professional manner, and delivered with top quality results. We clear both residential and commercial lots of trees, stumps, soil, debris, and more. Our team operates with the upmost professionalism and our equipment is well maintained and carries names like Kubota and John Deere. If you like what you see, please give us a call, or complete the contact form, and let us schedule your quote today! We look forward to hearing from you.
Putnam County FL, St. John's County FL, Clay County FL, Flagler County FL, Marion County FL, Alachua County FL, Bradford County FL, and Volusia County FL. Please feel free to give us a call, to see if we serve your area!


DELPART
Section: Maintenance Commands (8)Updated: 11 Jan 2007
Index Return to Main Contents
NAME
delpart - simple wrapper around the "del partition" ioctlSYNOPSIS
delpart device partitionDESCRIPTION
delpart is a program that asks the Linux kernel to remove a partition.This command doesn't manipulate with partitions on hard drive.
OPTIONS
- device
- Specify the disk device.
- partition
-
Specify the partition number.
SEE ALSO
addpart(8), fdisk(8), parted(8), partprobe(8), partx(8)AVAILABILITY
The delpart command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.
Index
This document was created by man2html, using the manual pages.
Time: 05:34:25 GMT, December 24, 2015


The Game of Life, also known simply as Life, is a cellular automaton
devised by the British mathematician John Horton Conway in 1970.
Each square in the grid is a cell that is either alive or dead. At each step
in time, the following transitions occur:
1. Any live cell with fewer than two live neighbors dies
2. Any live cell with two or three live neighbors lives on
3. Any live cell with more than three live neighbors dies
4. Any dead cell with exactly three live neighbors becomes alive
Click any cell below to switch its state or play with the controls below!


Victoria Falls, Zimbabwe is home to the world’s largest waterfall. Considered one of the 7 Wonders of the Natural World, this magnificent site is the centerpiece of this amazing adventure. Trek through the bush on the back of an African Elephant; Search for the Big Five on an exciting night safari; feel the thrill of rafting with Hippos, Crocs, and Elephants on the great Zambezi River; tour one of the greatest feats of engineering in Africa, the Victoria Falls Bridge; and be captivated by the Flight of Angels Helicopter Tour over Victoria Falls!
- 7 days and 7 nights in 4 star accommodations including hot breakfast daily
- Sunset Cruise on the Zambezi River where you’ll see hippos, crocodiles, elephants and more
- Elephant Back Safari
- Night Safari on a “Big 5” reserve
- Soaring helicopter ride over the falls
- Victoria Falls Bridge Tour with magnificent views of the gorge
- High Tea at Victoria Falls Hotel overlooking the Victoria Falls Bridge
- Safari through Zambezi National Park
- Z River ligambeziht raft trip
- BOMA Dinner- An unforgettable cultural experience


--- layout: post date: 2009-11-26 time: "09:00:00" authors: ["Greg Wilson"] title: Caesar's Wife tags: ["Noticed", "Opinion"] ---
Improving the way scientists use computers isn't just about making them more productive: it's also essential to defending the integrity of their work. Stories like this one about a researcher struggling in vain for three years to replicate someone else's results can only undermine public confidence at a time when we need to make a lot of hard decisions in a hurry. Sadly, we have no one to blame but ourselves...
Later: see also Victoria Stodden's post.


Click here to download the dataset as a TSV from Data.World
Click here to download the dataset as a Hyper Extract from Data.World
Historical Background
Since 1972, the United Nations Educational, Scientific and Cultural Organization has been tasked with protecting the sites that hold cutural or natural significance. These sites have been identified as holding the key to our past, a part of our heritage. Sites that hold either cultural or natural significance can be added to the list through first being added to the Tentative List. The Tentative List is reviewed annually by the International Council on Monuments and Sites and the World Conservation Union, before then being sent on to the UNESCO World Heritage Committee if recommended.
The 'Convention concerning the Protection of the World Cultural and Natural Heritage' is an international treaty that was ratified by 193 UN Member States (189) and other territories. This treaty provides for the protection of sites that have been designated Heritage Sites under the Geneva Convention and other international treaties. In addition to providing legal protection to sites, UNESCO can also identify a site as endangered allowing for additional protection and conservation for the site, or in some cases (two to date) delisting.
The sites on this list comprise some of the oldest data points we've featured for #ThrowbackDataThursday. We'd really love to see what you can do with this week's dataset! Download the data and see what you can do. Create your viz and post your work to Tableau Public and Twitter with the hashtag #ThrowbackDataThursday, tagging @TThrowbackThurs. We're really looking forward to seeing what the Tableau Community can come up with!
Data Source
This week's dataset comes from UNESCO. Please be sure to cite the source on your viz.


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The creator of this website is neither the owner of, nor affiliated with, the content of the transcripts generated within. This website is not affiliated with the YouTube brand or any other Google Product.


JUST FOR KIDS- stannous fluoride gel
3M ESPE Dental Products
Disclaimer: Most OTC drugs are not reviewed and approved by FDA, however they may be marketed if they comply with applicable regulations and policies. FDA has not evaluated whether this product complies.
Active ingredient
Stannous fluoride 0.4% (0.15% w/v fluoride ion)
Use
Aids in the prevention of dental decay
Warnings
Keep out of reach of children. If more than used for brushing is accidentally swallowed, seek medical attention or contact a Poison Control Center right away.
- this product may produce surface staining of the teeth
- adequate toothbrushing may prevent staining
- staining is not harmful or permanent and may be removed by your dental professional
Directions
adults and children 6 years of age and older:
- use a pea-sized (.25g) dose once a day after brushing your teeth with a toothpaste
- apply the gel to your teeth and brush thoroughly
- allow the gel to remain on your teeth for 1 minute and then spit out
- do not swallow the gel
- do not eat or drink for 30 minutes after brushing
- instruct children under 12 years of age in the use of this product (to minimize swallowing)
- supervise children as necessary until capable of using without supervision children under 6 years of age:
- consult a dentist or doctor
Other information
- this is a fluoride preventive treatment gel, not a toothpaste
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Inactive ingredients
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IMPORTANT: Read
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OMNI
Contents:
1 Bottle
NET WT. 4.3 oz (121.9 g)
Principal Display Panel – Box Label
Grapey Grape
NDC 48878-4020-3
3M ESPE
Just For Kids
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IMPORTANT: Read
directions thoroughly.
OMNI
Contents:
1 Bottle
NET WT. 4.3 oz (121.9 g)


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Table of Contents
The Samba Suite of programs allows you to share Unix resources with SMB Clients (in many cases MS Windows clients.) This significantly simplifies client access to OpenBSD printing and file resources. Users on client machines access Samba resources as they would any other (file/print) resource available from SMB servers such as Windows NT or Windows 9x.
We use OpenBSD/Samba to allow our network users to use the same tools for accessing their files on the OpenBSD/Samba box as they previously did when the same resources were on the Win NT boxes. Users can open their files from within their applications or use Windows Explorer to browse through the OpenBSD/Samba shares.
[OpenBSD 3.6 snapshot(Jan 2005)]
[package: samba-3.0.11.tgz ]
[ref: Samba Book available from http://www.samba.org]
Install the package using pkg_add
| # pkg_add /[path-to-package]/samba-3.0.11.tgz |
The samba package will be installed and you may wish to copy one of the sample configuration files as a starter for your samba setup. For example:
| # cp /usr/local/lib/samba/smb.conf.sample /etc/samba/smb.conf |
The quickest way to start samba is to launch the daemons manually:
| # /usr/local/libexec/smbd -D # /usr/local/libexec/nmbd -D |
Although we don't want to be frustrated with having to do that manually everytime we start the computer, it is a good way to test whether the installation files did get installed.
[ref: ../ports/net/samba/files/README.OpenBSD]
There are at least three different methods available for starting the samba daemons (smbd, and nmbd) The two most appropriate for starting the server at each boot process is a scripting addition or configuring inetd. The BSDish scripting is adding instructions to the /etc/rc.local file, System V'sh solutions create a separate startup script.
Edit the /etc/rc.conf.local file to include in Section 2 the following lines:
| smbd=YES nmbd=YES |
Edit: /etc/rc.local.
After the 'starting local daemons' and before the following echo '.', Insert the following instructions to the /etc/rc.local file:
|
echo -n 'starting local daemons:' # [ ... stuff left out ... ] |
|
|
|
# [ ... stuff left out ... ] echo '.' |
Now each restart of the machine will automatically check to see whether we have enabled samba in the configuration file (rc.conf.local) and then start the smbd, and nmbd daemons. If we wish to disable samba we can simply change smbd=YES to smbd=NO ; nmbd=YES to nmbd=NO
If you chose the inetd path then two files /etc/services and /etc/inetd.conf need to be updated. Note that to only use the rc.local update or this configuration but do not use both as it may cause problems further down the line for you.
/etc/services : change this file to include the following lines
| netbios-ssn 139/tcp netbios-ns 137/udp |
/etc/inetd.conf : change this file to update the lines referring to the above ports
| netbios-ssn stream tcp nowait root
/usr/local/libexec/smbd netbios-ns dgram udp wait root /usr/local/libexec/nmbd |
Of course one advantage of inetd is you don't have to restart the computer to get things up and running. Just send a -HUP signal to inetd and samba will be started.
[Config file: /etc/samba/smb.conf ]
[Utility: smbclient]
A quick diagnostic test to verify whether the nmbd/smbd daemons are working is to use the smbclient program, one of the tools supplied with the samba suite of programs. smbclient attempts a client connection to an smb server, so one simple test is to attempt a connection to our localhost smb server.
# smbclient -U% -L localhost
The -U% specifies attempt the connection with User % (% expands to be root, or current login) -L specifies the hostname to connect to (localhost.) The above command should show the Shares available on the localhost server (ipc$ et. al.) as well as other machines in the Work-group.
| Sharename Type
Comment ---------- ----- ------- IPC$ IPC IPC Service (Samba Server) Server Comment --------- ------- OPENBSDBOX Samba Server |
In the above example, the returned displays the Server OPENBSDBOX as being in the smb workgroup. OPENBSDBOX is the short-name for this sample localhost.
Basic configuration file settings that can be used to approximate the initial part of what your samba server should look like to to set the following settings in the configuration file /etc/samba/smb.conf
| workgroup =
myworkgroup encrypt passwords = yes smb passwd file = /etc/samba/smbpasswd unix password sync = yes passwd program = /usr/bin/passwd %u interfaces ip_for_eth0 ip_for_eth1 |
ip_for_eth0 and ip_for_eth1 - These are the ip-addresses for the Ethernet cards on your server that you wish Samba to service through. For example, if you had one ethernet card for your LAN (eth0:<IP_ADDRESS>) and one ethernet card for your external connection (ISP eth1:<IP_ADDRESS>) then you can specify something like:
interfaces <IP_ADDRESS>
This would allow machines on your local LAN access to the samba server, but not machines connected through any other devices.
Encrypt Passwords: All the clients i am using with my samba server will be Win98 or Win2000 and i want passwords encrypted when passed between the server and machines in preparation for when the sites go live on the internet.
[Config file: /etc/services ]
[Config file: /etc/inetd.conf ]
SWAT provides a GUI based tool for modifying samba's configuration file /etc/samba/smb.conf. Unfortunately it can also cause disastrous things such as wipe the configuration file (actual experience.) Following are the steps required to configure swat, which is installed but not enabled by the samba installation.
Edit /etc/services to include the following line
| swat 901/tcp # Samba Web Administration Tool |
Edit /etc/inetd.conf to include the following lines
| swat stream tcp nowait.400 root /usr/local/sbin/swat swat |
Restart the inetd daemon so it can re-read the changes you have made to the /etc/inetd.conf file.
| # kill -HUP `cat /var/run/inetd.pid` |
You should now be able to point a browser (for example Windows/Internet Explorer) at your webserver:901 to configure samba using the SWAT GUI interface instead of having to manually edit through the smb.conf file.
Security Concern. I think swat sends passwords cleartext. You should be aware of this problem if concerned about potential security compromises by using swat.
[Config file: /etc/samba/smbusers ]
[Config file: /etc/samba/smbpasswd]
[Utility: /usr/local/bin/smbpasswd ]
To make sure that you can access the smb shares from other clients, make sure you add the smb access users to the /etc/samba/smbusers and the /etc/samba/smbpasswd file. I find this necessary because I specify the use of encrypted passwords for authentication.
smbpasswd -a login-id
For example:
# smbpasswd -a samt
More Information:
Run by root, the smbpasswd program can "-a" add a new user to the smbpasswd file. This is also a neat trick for finding out where the smbpasswd is 'supposed' to be located.
Other useful options:
| -x
delete the user information -d disable the user account -e enable a disabled account, no effect if account currently enabled -r remote machine on which smb access is to be changed. |
As my environments is OpenBSD/Samba joining an existing Windows NT Primary Domain Controller (PDC) I need to maintain authentication on one server to minimise work-load. For this discussion we will use DEMO_DOMAIN as the domain and PDC_SERVER as the name of the Primary Domain Controller (Windows NT 4.0x server) server.
The following are the basic steps for enabling NT Domain authentication for Samba connections.
On the Win NT (4.0 ) PDC Server, start the Administrator -> Server Manager program. Add the OpenBSD/Samba server you have installed as a "Windows NT Workstation or Server"
On the Win2000 Advanced Server PDC, start the Administrator -> Active Directory Users and Computers. Select the Domain you will be adding the OpenBSD/Samba server to. Add a new computer and make sure you select the check-box "Allow pre-Windows 2000 computers to use this account"
For the name of the OpenBSD/Samba server, use the NetBIOS name you have either specified in /etc/samba/smb.conf, or use the short-name of the server (OPENBSDBOX for this example).
This only works if the OpenBSD/Samba server has been 'installed' into the domain as mentioned above, so make sure that you have followed the above step and verified the OpenBSD/Samba server is a valid 'NT Workstation or Server.'
From the OpenBSD/Samba machine join the Primary Domain by using the smbpasswd "join" facility
| # smbpasswd -j DEMO_DOMAIN -r PDC_SERVER |
To complete joining the Domain, we need to make a few configuration changes. (a) we need to tell Samba to use the Primary Domain Controller for authentication, and (b) We need to use encrypted passwords. Windows NT sp3 and greater default to using encrypted password transmission.
File /etc/samba/smb.conf
| domain controller = PDC_SERVER encrypt passwords = yes |
Restart the samba server and user connections will now be verified through the Windows NT Domain Controller. Note that users still need a valid account on the server if user directories are expected.
[ref: Samba-2.2.2/docs/Samba-HOWTO-Collection.pdf]
With later versions of Samba (2.2.2) we are able to use the OpenBSD/Samba combination to authenticate users for a LAN comprising Windows NT and Win9X clients. In this scenario, your OpenBSD/Samba server is the Primary Domain Controller (Windows Speak) and provides authentication for your Windows clients.
By configuring your clients to forcibly join the domain, you can ensure all workstation users must be validated from the OpenBSD/Samba server.
We may want to do this if we do not have a legitimate (Microsoft) Windows Server that can authenticate as the primary domain controller.
The Samba distribution actually comes with a HOWTO for this task (Chapter 8. How to Configure Samba 2.2 as a Primary Domain Controller)
In short, we set the configurations (in a working Samba system):
To configure your Samba server to provide user authentication you will need to include the following.
[global] workgroup = myworkgroup security = user domain master = yes local master = yes domain logons = yes |
|
Diagram - portion of [global]
|
Security is set to user (not domain as you would initially expect.) The server is set to be the domain master and service domain logons which is where we will configure user authentication.
The add user script will be used by Samba to add a machine account for joining NT Workstations to the domain. This script will create an /etc/passwd entry using the client workstation's netbios name. At this writing (Samba 2.2.2) Samba requires the /etc/passwd entry before it can create a Samba account for the workstation.
Since OpenBSD typically does not allow workstations to have the dollar character "$" in a user-id we need to modify the useradd source to allow the dollar character "$". Of course, you can manually create the accounts and not need to change the source code. Unix, including OpenBSD, readily allows the $ sign, but the user creation programs do not normally allow the use of dollar signs for a number of practical reasons.
package: stunnel-3.8.tgz
package: openssl (installed either as source build or ssl2?)
[ref: OpenBSD FAQ 10.6
Setting up a Secure HTTP Server with SSL]
[local: openss# - Secured Communications]
[ref: Samba Book]
Samba can be set up to communicate exclusively through SSL, which is great but seems to be problematically difficult (as in real difficult) to roll out on a WinX environment. By at least forcing SWAT communications to use SSL then we add one level of security ? Using information available from the Samba site and the OpenBSD FAQ, I have generated this step-by-step list for using SSL with SWAT under OpenBSD (installation with 2.7)
1. install the stunnel package
# pkg_add /[location-of-packages]/stunnel-3.8.tgz
After stunnel is installed, you have to create a server certificate and put the result in /etc/ssl/private/stunnel.pem. For more information on how to create certificates, read ssl(8). For more information on stunnel, read stunnel(8).
2. Prepare certificate for stunnel. According to samba doc's stunnel documentation says that a blank line is needed between private key and certificate and another blank line at the end of the file (make sure you have created the server certificates per references above.)
| # echo "" > ~/blankline.txt # cat /etc/ssl/private/server.key ~/blankline.txt /etc/ssl/server.crt \ ~/blankline.txt > /etc/ssl/stunnel.pem |
3. Move the stunnel.pem file to a standardised location
| # mv /etc/ssl/stunnel.pem /etc/ssl/private |
4. Set the file permissions so no root have no access to the file
| # chmod 700 /etc/ssl/private/stunnel.pem |
5. Remove swat entry from inetd.conf (restart inetd)
| # kill -HUP `cat /var/run/inetd.pid` |
6. Start stunnel
| # /usr/local/sbin/stunnel -p /etc/ssl/private/stunnel.pem -d 901 -l /usr/local/sbin/swat -- swat |
7. We now include stunnel into the configuration for SWAT
Edit the /etc/rc.conf.local file to include the following line:
| stunnel_swat=YES |
Edit: /etc/rc.local.
After the 'starting local daemons' and before the following echo '.', Insert the following instructions to the /etc/rc.local file:
| echo -n 'starting local daemons:' |
| # [ ... stuff left out ... ]
|
|
# [ ... stuff left out ... ] echo '.' |
Now each restart of the machine will automatically check to see whether we have enabled stunnel for swat in the configuration file (rc.conf) and then start the stunnel. If we wish to disable stunnel for swat we can simply change stunnel_swat=YES to stunnel_swat=NO.
Connect to the SSL enabled site using https://your_sambaserver:901 and accept the certificate.
package: Sharity-light_1_2.tgz
Sometimes you want to access the Windows (eg. Win95, Win98, Win2000, WinNT) file share from within the Unix box. Sharity-Light is similar to the Linux only smbfs (smbmount, smbumount) which allows the user to mount a Windows file-share onto your unix file-system.
http://www.obdev.at/Products/Sharity.html
Check out the developer's website above for more information on the "light" version and their commercial product.
Copyright (c) 2005 Samiuela LV Taufa. All Rights Reserved.
I reserve the right to be totally incorrect even at the best advice of betters.
You are permitted and encouraged to use this guide for fun or for profit as you see fit. If you republish this work in what-ever form, it would be nice (though not enforceable) to be credited.
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