Overcome the Reign of Chaos

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This document discusses using machine learning and data analysis techniques to improve community management and content moderation on an online question and answer site. It describes building models to automatically rate answers, challenges faced such as lack of training data and complex user behavior, and efforts taken to address these such as collecting more data, using more complex neural network models, and developing tools for moderators. It also covers expanding these techniques to related tasks like question rating, building a taxonomy of tags, and using insights from data and models to further improve the user experience.

4.6 Mio.
views per day
60 k
new content items per day
13 Mio.
questions
46 Mio.
answers
Community.

Source: AGOF e.V. / internet facts 2013-12
Reach.

Overcome the Reign of Chaos
Michael Stockerl

Track each action
● Pageview
● View of content items
● Click event

Remember the user
● ClientId
● Location
● User-Agent

Enrich data points
● Parse arguments
● Join to database ids (e.g. question id)

Learnings
● Kafka is crazy robust
● Parquet accelerates reads
● Spark faster than Hadoop (development and production)
● Backpressure needed for MySQL and Elasticsearch
● Reliable Analytics and A/B Testing pipeline

Make Data Available with Tableau
THRIFT SERVER

Learnings
● Tableau easy to learn...
● … but hard to master
● Spark Thriftserver crashes all the time ( somebody same experience? )
● Non - Dev Departments love it

Community Management
meets
Machine Learning

Goal: Automatically rate answers
● Sort answers for each question
● Hide bad answers
● Report really bad answers
-> Algorithm to rate answers

Solution: Logistic Regression
● Supervised Machine Learning algorithm
● 2000 training & test examples
● Trained first and simple model
● Brought it to production

Problems
● Model not complex enough
● Similar inputs, different outputs
● Not enough training data
● Missing definition of a good answer

Problems
● Model not complex enough
● Similar inputs, different outputs
● Not enough training data
● Missing definition of a good answer
-> Collect more data
-> Use more features
-> More complex model

Moderation Tool
● Definition of Categories
● Rate answers as fast as possible
● Randomly picked (at first)
● Delete answers

Dataset clean?
● See distribution of classification
● Monitor single classifications
● Rate too nice?
● Or too harsh?

Project Angmar
● Tried a lot of Supervised Learning Methods
● Feature Engineering: Most crucial part
● Analyse the domain, chart everything

Features
Content
length
syntactic complexity
number of links
probability of deletion
Social
votes
most helpful answer
number of comments
answered by expert
Author
gained votes
credibility score
role
ratio of deleted answers
number of answers
number of comments
ratio of reported answers

The winner: A simple Neural Net
Answer
vector
AV
normalized
Input
layer
21
3
1
0.2
0.4
0.1
2 0.8
wordCount
voteUp
voteDown
n
Hidden
layer
Output
layer
2n
Score 0.2

Debugging with Radagast
AV
normalized
Input
layer
Hidden
layer
Output
layer
0.2
0.4 -> 0.6
0.1
0.8
wordCount
voteUp
voteDown
n
2n
Score 0.5
+10

Before switching models
Amount of answers
for a score range

Compare Live and Shadow Model
Amount of answers
for a score range

Answerscore per Userlevel
Standard deviation

Answerscore per Userlevel
Standard deviation
History of user matters

Goal: Directed Acyclic Graph
● Model Hierachy
● Use our content
○ Co-occurence with top tags
○ Repeat with those tags
○ Refinement manually
● Use Cases:
○ Recommender
○ Answer Score
○ Search
○ Experts
Computer
root
Sport
Games Fußball
Fifa 17

Taxonomy
UI any ideas? Computer
root
Sport
Games Fußball
Fifa 17

Learning
In God we trust;
all others bring data
W. Edwards Deming

Questions?
We’re hiring!
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Q1’2024 Update: MYCI’s Leap Year Rebound

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一比一原版(UofS毕业证书)萨省大学毕业证如何办理

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SOCRadar Germany 2024 Threat Landscape Report

SOCRadar

As Europe's leading economic powerhouse and the fourth-largest hashtag#economy globally, Germany stands at the forefront of innovation and industrial might. Renowned for its precision engineering and high-tech sectors, Germany's economic structure is heavily supported by a robust service industry, accounting for approximately 68% of its GDP. This economic clout and strategic geopolitical stance position Germany as a focal point in the global cyber threat landscape. In the face of escalating global tensions, particularly those emanating from geopolitical disputes with nations like hashtag#Russia and hashtag#China, hashtag#Germany has witnessed a significant uptick in targeted cyber operations. Our analysis indicates a marked increase in hashtag#cyberattack sophistication aimed at critical infrastructure and key industrial sectors. These attacks range from ransomware campaigns to hashtag#AdvancedPersistentThreats (hashtag#APTs), threatening national security and business integrity. 🔑 Key findings include: 🔍 Increased frequency and complexity of cyber threats. 🔍 Escalation of state-sponsored and criminally motivated cyber operations. 🔍 Active dark web exchanges of malicious tools and tactics. Our comprehensive report delves into these challenges, using a blend of open-source and proprietary data collection techniques. By monitoring activity on critical networks and analyzing attack patterns, our team provides a detailed overview of the threats facing German entities. This report aims to equip stakeholders across public and private sectors with the knowledge to enhance their defensive strategies, reduce exposure to cyber risks, and reinforce Germany's resilience against cyber threats.

【社内勉強会資料_Octo: An Open-Source Generalist Robot Policy】

NABLAS株式会社

The affect of service quality and online reviews on customer loyalty in the E...

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一比一原版(CU毕业证)卡尔顿大学毕业证成绩单

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原版制作(Deakin毕业证书)迪肯大学毕业证学位证一模一样

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学校原件一模一样【微信：741003700 】《(Deakin毕业证书)迪肯大学毕业证学位证》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。本公司拥有海外各大学样板无数，能完美还原。 1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700 【主营项目】一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！二.真实使馆公证(即留学回国人员证明,不成功不收费) 三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度) 如果您处于以下几种情况： ◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】 ◇面对父母的压力，希望尽快拿到； ◇不清楚认证流程以及材料该如何准备； ◇回国时间很长，忘记办理； ◇回国马上就要找工作，办给用人单位看； ◇企事业单位必须要求办理的 ◇需要报考公务员、购买免税车、落转户口 ◇申请留学生创业基金留信网认证的作用: 1:该专业认证可证明留学生真实身份 2:同时对留学生所学专业登记给予评定 3:国家专业人才认证中心颁发入库证书 4:这个认证书并且可以归档倒地方 5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息 6:个人职称评审加20分 7:个人信誉贷款加10分 8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才

一比一原版(Adelaide毕业证书)阿德莱德大学毕业证如何办理

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原版定制【微信:41543339】【(Adelaide毕业证书)阿德莱德大学毕业证】【微信:41543339】成绩单、外壳、offer、留信学历认证（永久存档真实可查）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。【我们承诺采用的是学校原版纸张（纸质、底色、纹路），我们拥有全套进口原装设备，特殊工艺都是采用不同机器制作，仿真度基本可以达到100%，所有工艺效果都可提前给客户展示，不满意可以根据客户要求进行调整，直到满意为止！】【业务选择办理准则】一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信41543339】文凭即可二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信41543339】即可三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。留信网认证的作用: 1:该专业认证可证明留学生真实身份 2:同时对留学生所学专业登记给予评定 3:国家专业人才认证中心颁发入库证书 4:这个认证书并且可以归档倒地方 5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息 6:个人职称评审加20分 7:个人信誉贷款加10分 8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才留信网服务项目： 1、留学生专业人才库服务（留信分析） 2、国（境）学习人员提供就业推荐信服务 3、留学人员区块链存储服务 → 【关于价格问题（保证一手价格）】我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子我给客户的都是第一手的代理价格，因为我想坦诚对待大家不想跟大家在价格方面浪费时间对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。选择实体注册公司办理，更放心，更安全！我们的承诺：客户在留信官方认证查询网站查询到认证通过结果后付款，不成功不收费！

FP Growth Algorithm and its Applications

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一比一原版(UPenn毕业证)宾夕法尼亚大学毕业证成绩单

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一比一原版(Bradford毕业证书)布拉德福德大学毕业证如何办理

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原版定制【微信:41543339】【(Bradford毕业证书)布拉德福德大学毕业证】【微信:41543339】成绩单、外壳、offer、留信学历认证（永久存档真实可查）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。【我们承诺采用的是学校原版纸张（纸质、底色、纹路），我们拥有全套进口原装设备，特殊工艺都是采用不同机器制作，仿真度基本可以达到100%，所有工艺效果都可提前给客户展示，不满意可以根据客户要求进行调整，直到满意为止！】【业务选择办理准则】一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信41543339】文凭即可二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信41543339】即可三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。留信网认证的作用: 1:该专业认证可证明留学生真实身份 2:同时对留学生所学专业登记给予评定 3:国家专业人才认证中心颁发入库证书 4:这个认证书并且可以归档倒地方 5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息 6:个人职称评审加20分 7:个人信誉贷款加10分 8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才留信网服务项目： 1、留学生专业人才库服务（留信分析） 2、国（境）学习人员提供就业推荐信服务 3、留学人员区块链存储服务 → 【关于价格问题（保证一手价格）】我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子我给客户的都是第一手的代理价格，因为我想坦诚对待大家不想跟大家在价格方面浪费时间对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。选择实体注册公司办理，更放心，更安全！我们的承诺：客户在留信官方认证查询网站查询到认证通过结果后付款，不成功不收费！

一比一原版(UMich毕业证)密歇根大学|安娜堡分校毕业证成绩单

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UMich毕业证【微信95270640】办理UMich毕业证【Q微信95270640】密歇根大学|安娜堡分校毕业证书原版↑制作密歇根大学|安娜堡分校学历认证文凭办理密歇根大学|安娜堡分校留信网认证,留学回国办理毕业证成绩单文凭学历认证【Q微信95270640】专业为海外学子办理毕业证成绩单、文凭制作，学历仿制，回国人员证明、做文凭，研究生、本科、硕士学历认证、留信认证、结业证、学位证书样本、美国教育部认证百分百真实存档可查】【本科硕士】密歇根大学|安娜堡分校密歇根大学|安娜堡分校硕士毕业证成绩单（GPA修改）；学历认证（教育部认证）；大学Offer录取通知书留信认证使馆认证；雅思语言证书等高仿类证书。办理流程： 1客户提供办理密歇根大学|安娜堡分校密歇根大学|安娜堡分校硕士毕业证成绩单信息：姓名生日专业学位毕业时间等（如信息不确定可以咨询顾问：我们有专业老师帮你查询）； 2开始安排制作毕业证成绩单电子图； 3毕业证成绩单电子版做好以后发送给您确认； 4毕业证成绩单电子版您确认信息无误之后安排制作成品； 5成品做好拍照或者视频给您确认； 6快递给客户（国内顺丰国外DHLUPS等快读邮寄）真实网上可查的证明材料 1教育部学历学位认证留服官网真实存档可查永久存档。 2留学回国人员证明（使馆认证）使馆网站真实存档可查。我们对海外大学及学院的毕业证成绩单所使用的材料尺寸大小防伪结构（包括：密歇根大学|安娜堡分校密歇根大学|安娜堡分校硕士毕业证成绩单隐形水印阴影底纹钢印LOGO烫金烫银LOGO烫金烫银复合重叠。文字图案浮雕激光镭射紫外荧光温感复印防伪）都有原版本文凭对照。质量得到了广大海外客户群体的认可同时和海外学校留学中介做到与时俱进及时掌握各大院校的（毕业证成绩单资格证结业证录取通知书在读证明等相关材料）的版本更新信息能够在第一时间掌握最新的海外学历文凭的样版尺寸大小纸张材质防伪技术等等并在第一时间收集到原版实物以求达到客户的需求。本公司还可以按照客户原版印刷制作且能够达到客户理想的要求。有需要办理证件的客户请联系我们在线客服中心微信：95270640 或咨询在线在我脑海中回旋很幸运我有这样的机会能将埋在心底深深的感激之情得以表达从婴儿的“哇哇坠地到哺育我长大您们花去了多少的心血与汗水编织了多少个日日夜夜从上小学到初中乃至大学燃烧着自己默默奉献着光和热全天下的父母都是仁慈的无私的伟大的所以无论何时何地都不要忘记您们是这样的无私将一份沉甸甸的爱和希望传递到我们的眼里和心中而我应做的就是感恩父母回报社会共创和谐父母对我们的恩情深厚而无私孝敬父母是我们做人元

一比一原版(QU毕业证)皇后大学毕业证成绩单

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QU毕业证【微信95270640】办理皇后大学毕业证原版一模一样、QU毕业证制作【Q微信95270640】《皇后大学毕业证购买流程》《QU成绩单制作》皇后大学毕业证书QU毕业证文凭皇后大学本科毕业证书,学历学位认证如何办理【留学国外学位学历认证、毕业证、成绩单、大学Offer、雅思托福代考、语言证书、学生卡、高仿教育部认证等一切高仿或者真实可查认证服务】代办国外（海外）英国、加拿大、美国、新西兰、澳大利亚、新西兰等国外各大学毕业证、文凭学历证书、成绩单、学历学位认证真实可查。 1:1完美还原海外各大学毕业材料上的工艺：水印阴影底纹钢印LOGO烫金烫银LOGO烫金烫银复合重叠。文字图案浮雕激光镭射紫外荧光温感复印防伪。可办理以下真实皇后大学存档留学生信息存档认证： 1皇后大学真实留信网认证（网上可查永久存档无风险百分百成功入库）； 2真实教育部认证（留服）等一切高仿或者真实可查认证服务（暂时不可办理）； 3购买英美真实学籍（不用正常就读直接出学历）； 4英美一年硕士保毕业证项目（保录取学校挂名不用正常就读保毕业）留学本科/硕士毕业证书成绩单制作流程： 1客户提供办理信息：姓名生日专业学位毕业时间等（如信息不确定可以咨询顾问：我们有专业老师帮你查询皇后大学皇后大学硕士毕业证成绩单）； 2开始安排制作皇后大学毕业证成绩单电子图； 3皇后大学毕业证成绩单电子版做好以后发送给您确认； 4皇后大学毕业证成绩单电子版您确认信息无误之后安排制作成品； 5皇后大学成品做好拍照或者视频给您确认； 6快递给客户（国内顺丰国外DHLUPS等快读邮寄） — — — — — — — — — — — 《文凭顾问Q/微：95270640》很感动很无奈房东的儿子小伍笨手笨脚的不会说普通话满口粤语态度十分傲慢一副盛气凌人的样子山娃试图接近他跟他交友与城里人交友但他俩就好像是两个世界里的人根本拢不到一块儿不知不觉山娃倒跟周围出租屋里的几个小伙伴成了好朋友因为他们也是从乡下进城过暑假的小学生快乐的日子总是过得飞快山娃尚未完全认清那几位小朋友时他们却一个接一个地回家了山娃这时才恍然发现二个月的暑假已转到了尽头他的城市生活也将划上一个不很圆义

Chatty Kathy - UNC Bootcamp Final Project Presentation - Final Version - 5.23...

John Andrews

SlideShare Description for "Chatty Kathy - UNC Bootcamp Final Project Presentation" Title: Chatty Kathy: Enhancing Physical Activity Among Older Adults Description: Discover how Chatty Kathy, an innovative project developed at the UNC Bootcamp, aims to tackle the challenge of low physical activity among older adults. Our AI-driven solution uses peer interaction to boost and sustain exercise levels, significantly improving health outcomes. This presentation covers our problem statement, the rationale behind Chatty Kathy, synthetic data and persona creation, model performance metrics, a visual demonstration of the project, and potential future developments. Join us for an insightful Q&A session to explore the potential of this groundbreaking project. Project Team: Jay Requarth, Jana Avery, John Andrews, Dr. Dick Davis II, Nee Buntoum, Nam Yeongjin & Mat Nicholas

做(mqu毕业证书)麦考瑞大学毕业证硕士文凭证书学费发票原版一模一样

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原版定制【Q微信:741003700】《(mqu毕业证书)麦考瑞大学毕业证硕士文凭证书》【Q微信:741003700】成绩单、雅思、外壳、留信学历认证永久存档查询，采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。【业务选择办理准则】一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【Q微信741003700】文凭即可二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信741003700】即可三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。留信网认证的作用: 1:该专业认证可证明留学生真实身份 2:同时对留学生所学专业登记给予评定 3:国家专业人才认证中心颁发入库证书 4:这个认证书并且可以归档倒地方 5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息 6:个人职称评审加20分 7:个人信誉贷款加10分 8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才【关于价格问题（保证一手价格）】我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子我给客户的都是第一手的代理价格，因为我想坦诚对待大家不想跟大家在价格方面浪费时间对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。

一比一原版(UofM毕业证)明尼苏达大学毕业证成绩单

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Overcome the Reign of Chaos

1. Due to bad Topics Back in 2013 ...

2. Party

3. 4.6 Mio. views per day 60 k new content items per day 13 Mio. questions 46 Mio. answers Community.

4. Source: AGOF e.V. / internet facts 2013-12 Reach.

5. Hangover

6. Tracking

7. Community Management

8. Tagging

9. Overcome the Reign of Chaos Michael Stockerl

10. User Behaviour Tracking

11. Track each action ● Pageview ● View of content items ● Click event

12. Remember the user ● ClientId ● Location ● User-Agent

13. The Journey of a Data Point

14. Collect incoming events in Kafka

15. Enrich data points ● Parse arguments ● Join to database ids (e.g. question id)

16. Batch Processing Pipeline

17. Stream Processing Pipeline

18. Learnings ● Kafka is crazy robust ● Parquet accelerates reads ● Spark faster than Hadoop (development and production) ● Backpressure needed for MySQL and Elasticsearch ● Reliable Analytics and A/B Testing pipeline

19. Analytics ONLY with Devs

20. Democratize Data Access

21. Data Only Available in Primary Stores

22. Make Data Available with Tableau THRIFT SERVER

23. Learnings ● Tableau easy to learn... ● … but hard to master ● Spark Thriftserver crashes all the time ( somebody same experience? ) ● Non - Dev Departments love it

24. Community Management meets Machine Learning

25. Manually search for bad answers

26. Goal: Automatically rate answers ● Sort answers for each question ● Hide bad answers ● Report really bad answers -> Algorithm to rate answers

27. Solution: Logistic Regression ● Supervised Machine Learning algorithm ● 2000 training & test examples ● Trained first and simple model ● Brought it to production

28. Users were NOT happy

29. Problems ● Model not complex enough ● Similar inputs, different outputs ● Not enough training data ● Missing definition of a good answer

30. Problems ● Model not complex enough ● Similar inputs, different outputs ● Not enough training data ● Missing definition of a good answer -> Collect more data -> Use more features -> More complex model

31. Project Moria

32. Moderation Tool ● Definition of Categories ● Rate answers as fast as possible ● Randomly picked (at first) ● Delete answers

33. Dataset clean? ● See distribution of classification ● Monitor single classifications ● Rate too nice? ● Or too harsh?

34. Project Angmar

35. Project Angmar ● Tried a lot of Supervised Learning Methods ● Feature Engineering: Most crucial part ● Analyse the domain, chart everything

36. Features Content length syntactic complexity number of links probability of deletion Social votes most helpful answer number of comments answered by expert Author gained votes credibility score role ratio of deleted answers number of answers number of comments ratio of reported answers

37. The winner: A simple Neural Net Answer vector AV normalized Input layer 21 3 1 0.2 0.4 0.1 2 0.8 wordCount voteUp voteDown n Hidden layer Output layer 2n Score 0.2

38. Result on Testdata

39. Realworld Test deleted non-deleted

40. Problems in Production

41. Neural Nets in short

42. Debugging with Radagast AV normalized Input layer Hidden layer Output layer 0.2 0.4 -> 0.6 0.1 0.8 wordCount voteUp voteDown n 2n Score 0.5 +10

43. Before switching models Amount of answers for a score range

44. Compare Live and Shadow Model Amount of answers for a score range

45. Insights

46. woman man Woman write better answers

47. Answerscore per Userlevel Standard deviation

48. Answerscore per Userlevel Standard deviation History of user matters

49. Quality per Tag

50. Outlook

51. Question Rating

52. New Taxonomy

53. 1.005.994 Tags

54. Goal: Directed Acyclic Graph ● Model Hierachy ● Use our content ○ Co-occurence with top tags ○ Repeat with those tags ○ Refinement manually ● Use Cases: ○ Recommender ○ Answer Score ○ Search ○ Experts Computer root Sport Games Fußball Fifa 17

55. Prototyp - Related Tags: Umwelt

56. Prototyp - Related Tags: Polizei

57. Prototyp - Related Tags: Herz

58. Prototyp - Related Tags: Wissenschaft

59. Taxonomy UI any ideas? Computer root Sport Games Fußball Fifa 17

60. Learning In God we trust; all others bring data W. Edwards Deming

61. Questions?

62. Questions? We’re hiring! Scala Finagle Typescript Akka-HTTP Kafka Spark MySQL Elasticsearch Mesos Redis