amaah + modeling   88

Reshaping Terrorist Networks
all research is applied I suppose.... graph theory applied to the 'terrorist successor problem'... features sentences like: 'A terrorist organization network is a undirected graph with vertices and edges
networks  research  technology  mathematics  algorithms  systems  resilience  terrorism  modeling  abstractions 
august 2014 by amaah
Understanding Data
fine until he fell down the rathole of linked data
technology  data  software  modeling  resourcemodeling  design  architecture 
february 2014 by amaah
The Ghanaian transaction-based residential indices
Wilfred K. Anim-Odame's index for modeling the Ghanaian real-estate market.
modeling  realestate  housing  markets  research  city  urban  development  pricing  economics  Ghana  africa 
december 2010 by amaah
Folklore of Protocol Design
anthropological study that the html5 working group seems destined to follow
standards  design  technology  protocol  networks  groups  modeling  BestPractices  web  systems  architecture  culture  strategy 
september 2010 by amaah
An Option Value Problem from Seinfeld (pdf)
"This is a paper about nothing." Modeling the spongeworthiness dilemma that Elaine faces in Seinfeld as an option value optimization problem.
mathematics  economics  optimization  options  culture  decisions  modeling  tv  strategy  observation  seinfeld  filetype:pdf  media:document 
july 2010 by amaah
Douglas Purdy's vision
"A universal way for “real people” to securely access and publish structured and unstructured information (“Infobus”)." ... Well..... I once wrote a piece called Get on the Bus aka Glue layer people that amongst other things lampooned people that talked about "infobuses". Am I going to have to revisit that hatchet job or should I pay attention to Odata?
data  modeling  hype  structure  technology  semi-structured  web  microsoft  internet 
january 2010 by amaah
Subscription Artists
outlines an escrowed street performer business model used by kickstarte. The missing thing is how the middlemen make their money. I would be content simply living off the float.
business  modeling  economics  markets  strategy  middlemen 
january 2010 by amaah
Homophily, Contagion and Confounding: Pick Any Three (pdf)
Ethan should like this, a statistician's viewpoint on homophily... Cosma Shalizi strikes again.. His conclusions:
1. Homophily + causal influence looks like contagion
2. Homophily + contagion looks like causal influence
3. Of course contagion + causality looks like (is?) homophily
modeling  mathematics  statistics  networks  distribution  causality  homophily  groups  social  filetype:pdf  media:document 
november 2009 by amaah
Multicommodity network flow approach to the railroad crew-scheduling problem
great paper... The crew-scheduling problem is to assign operators to scheduled trains over a time horizon at minimal cost while honoring operational and contractual requirements. Currently, decisions related to crew are made manually. We present our work developing a network-flow-based crew-optimization model that can be applied at the tactical, planning, and strategic levels of crew scheduling.
technology  networks  systems  coordination  scheduling  mathematics  algorithms  programming  optimization  transportation  constraints  modeling  flow  operations  research  engineering  complexity  performance  economics  strategy  policy  decisions 
september 2009 by amaah
Clinical and Actuarial Judgment Compared
The rather surprising, and completely consistent, result of these studies is that there are no known cases where clinicians reliably out-perform actuarial methods, even when the statistical models are just linear classification rules, i.e., about as simple a model as you can come up with. In many areas, statistical classifiers significantly out-perform human experts. They even out-perform experts who have access to the statistical results, apparently because the experts place too much weight on their own judgment, and not enough on the statistics. Whether you think this is depressing news or not to some degree depends on your feelings about "clinical" experts.
science  statistics  medicine  judgement  health  humanfactors  decisions  modeling  mathematics  operations  operationsresearch  research  thinking  policy  strategy 
august 2009 by amaah
Collaborative Filtering with Temporal Dynamics (PDF)
Should recommendation systems consider the effect of time? Decay older activities? How does one model changing tastes?
recommendations  research  algorithms  software  technology  prediction  systems  mathematics  networks  computing  time  modeling  filetype:pdf  media:document 
july 2009 by amaah
Is Relational Relevant?
a folk history of relational databases from the point of view of Ingres
technology  history  data  database  software  adoption  design  architecture  web  scale  complexity  modeling 
april 2009 by amaah
A New Model for Network Valuation (pdf)
Beckstrom's law... aiming for coinage fame in hopes of overshadowing Metcalfe and Reed... nothing much to see here
systems  networks  technology  modeling  economics  communities  internet  web  end-to-end  lowendtheory  filetype:pdf  media:document 
april 2009 by amaah
The Unreasonable Effectiveness of Data
invariably, simple models and a lot of data trump more elaborate models based on less
technology  complexity  data  research  web  scale  mathematics  modeling  statistics  translation  algorithms  filetype:pdf  media:document 
march 2009 by amaah
Models of statistical distribution
When I carried out fieldwork in Ghana during the 1960s, I was amazed by how migrants found their relatives, after traveling 500 miles to an unknown city of a million people. They had no addresses or phone numbers written down. When they arrived in the central lorry park, they would look for someone wearing Northern dress and ask him where they could find people like themselves. Directed to a particular district, they would seek out a leading figure in the ethnic community. They might then be directed to someone else from their home village. By all means, within an hour or two, they would be sitting with their relative. These African migrants knew that we live in small worlds connected by fewer links than most of us imagine. They used contingent human encounters and network hubs like local big men, not street maps. Their method was news to me then, but it shouldn’t be now.
communities  networks  distribution  modeling  humanfactors  sociology  social  anthropology  statistics  migration  immigration  information  flow 
january 2009 by amaah
Relative Wealth Concerns and Asset Bubbles: An Experimental Approach (pdf)
risk is fun during a bubble... Calling bubble behaviour cognitive dissonance misses much of the point. Keeping up with the Joneses and the fear of missing out lowers our guard.
economics  research  bubble  credit  risk  debt  ShellGame  analysis  psychology  modeling  filetype:pdf  media:document 
january 2009 by amaah
The delusions of net neutrality (pdf)
Odlyzko lets loose and there was much joy in the land... movies are unlikely to
offer all that much revenue, further delivering movies in real-time
streaming mode is the wrong solution, expensive and unnecessary. Content is not king, and has never been king. "The purpose of data networks is to satisfy human impatience."
networks  technology  internet  web  policy  strategy  history  end-to-end  planning  modeling  evolution  economics  latency  performance  LowEndTheory  filetype:pdf  media:document 
december 2008 by amaah
Resilient Connections for SSH and TLS (pdf)
we extend the SSH and TLS protocols to support resilient connections that can span several sequential TCP connections. The extensions allow sessions to survive both changes in IP addresses and long periods of disconnection. Our design emphasizes deployability in real world environments, and addresses many of the challenges identified in previous work, including assumptions made about network middleboxes such as firewalls
and NATs.
technology  networks  resilience  adaptability  research  middleboxes  mobile  multihoming  routing  modeling  software  design  architecture  end-to-end  LowEndTheory  filetype:pdf  media:document 
november 2008 by amaah
The 2007 Meltdown in Structured Securitization: Searching for Lessons, Not Scapegoats (pdf)
The World Bank view: Incentive conflicts explain how securitization went wrong, why credit ratings proved so inaccurate, and why it is superficial to blame the crisis on mark-to-market accounting, an unexpected loss of liquidity, or trends in globalization. The paper argues that the principal source of financial instability lies in contradictory political and bureaucratic incentives that undermine the effectiveness of financial regulation and supervision in every country in the world.
economics  bubble  analysis  regulation  leverage  transparency  risk  management  finance  modeling  engineering  policy  politics  greed  incentives  USA  mortgage  credit  crisis  debt  banking  filetype:pdf  media:document 
november 2008 by amaah
In the Fog of Volatility, the Notional Becomes Payable
When an entire community of academicians suddenly changes cultural profile, that dear friends is what we call a ground rules shift. It means they are all going back to first principles analysis. Wives have a descriptive sentence for that when their husbands are driving … "You're lost dear."
economics  analysis  bubble  markets  confidence  trust  panic  crash  groups  uncertainty  transparency  opacity  strategy  risk  modeling  dynamics 
october 2008 by amaah
WebDSL: A Case Study in Domain-Specific Language Engineering (pdf)
Can one abstract the entire lifecycle of web applications? What are the primitives required in resource modeling? How closely does this framework hew to web native patterns?
abstractions  technology  software  modeling  web  programming  engineering  syntax  design  Architecture  research  language  DSL  filetype:pdf  media:document 
august 2008 by amaah
The Null Wars
It may be "nothing", but it's something, not nothing. It's like trying to say that the word "nothing" is not anything, does not exist. Trying to have something be nothing is bound to lead to a contradiction somewhere. What is null we ask?
naming  modeling  data  computing  technology  software  syntax  language  comprehension  humour 
may 2008 by amaah
Optimal boarding method for airline passengers
The passenger ordering which minimizes the time required to board the passengers onto an airplane. Beware the frustrated physics student... Whipping out a Markov Chain Monte Carlo optimization algorithm and a computer simulation
algorithms  transportation  physics  Optimization  mathematics  social  science  travel  airline  simulation  modeling  computing  organization 
april 2008 by amaah
James Ellroy's American Tabloid: Conspiracy Theory as Chaos Theory (pdf)
Finding mathematical patterns in Ellroy's depiction of the sewer of history. American history as American Tabloid. Who knew?
review  literature  criticism  conspiracy  modeling  crime  culture  filetype:pdf  media:document 
march 2008 by amaah
What’s wrong with HTTP (and why it doesn’t matter) (pdf)
oldie but goodie presentation about the cobwebs in HTTP. The bit about the complexity this has meant for caching is insightful, he posits "MIME analogy falsely extended to HTTP". integrity checking is on messages instead of documents
http  web  architecture  design  caching  technology  modeling  resourcemodeling  abstractions  filetype:pdf  media:document 
december 2007 by amaah
Before Models Can Turn Around, Knockoffs Fly
The fashion industry thrives on plagiarism and with improved technology/communication knockoffs can be created in increasingly shorter order. The saving grace, the social cues about what is "in", what is 'so last season'. signifiers keep industry afloat
business  modeling  fashion  style  taste  trends  economics  technology  adoption  culture  social  strategy  globalization 
september 2007 by amaah
A dizzying world of insight lurks beyond the averages
A gloriously rich world is hidden from us by "averages." We manage our lives and our businesses by choose averages on which to make a decision and we cut ourselves off from more nuanced information that might lead to a better decision.
strategy  business  decisions  economics  statistics  policy  modeling 
august 2007 by amaah
Content Management
The future of content management is Wikis: web pages, photos, vector diagrams and videos. It'll be based in the browser, using standard web technology like HTML, CSS, javascript and SVG. more emphasis on collaboration, syndication, and search. Google lead
office  web  productivity  collaboration  technology  software  insight  analysis  standards  competition  wiki  Google  Microsoft  IBM  Lotus  syndication  jotspot  content  data  design  architecture  strategy  modeling  atom  GreatGame 
june 2007 by amaah
Animating the web: functional styles
I've called this approach "functional styles", because it's basically a functional programming extension to CSS styles. In this approach, any CSS style can be animated by assigning it a function (via the equals sign), rather than a direct value. BUDS!!!
declaration  web  programming  technology  software  analysis  DOM  scripting  CSS  XPath  insight  forms  xforms  standards  style  computation  dependencies  algorithms  systems  Design  Architecture  binding  data  UI  modeling  functional  declarative  comprehension  interface  BUDS 
june 2007 by amaah
On resource modeling, intermediaries and deployment
thinking aloud about REST, resource modeling, caches, intermediaries, extensibility, deployment, http, how the linguistics of put are affecting the semantics of PUT, how the Atompub folk are the first Protestants of REST and more. Mailing list toli
rest  web  http  design  resource  resourcemodeling  caching  intermediaries  firewall  extensibility  deployment  modeling  linguistics  language  metaphysics  semantics  architecture  toli 
june 2007 by amaah
Innovating beyond the enterprise
Stuart Charlton says embrace the web style: Businesses are changing the way they arrange processes & resources. The "service network" is evolving into a web of resources and capabilities. Information assurance will be a major limiting factor
Technology  web  Software  information  data  security  control  participation  governance  uri  link  resource  modeling  rest 
june 2007 by amaah
RESTify DayTrader
View Sourcerer in Charge delivers another episode of Resource Modeling 101. I might just have to give him a new tag: Resource Modeler Emeritus?
resourcemodeling  rest  design  Architecture  software  web  internet  http  uri  technology  BestPractices  resource  modeling 
june 2007 by amaah
The challenge of resource modeling
The hardest thing about REST isn't the architectural style, it isn't the URI-space: it is the decomposition of the domain resource-space. resource-space decomposition is fundamentally hard. we don't have good notation and toolsets to assist the process.
rest  design  architecture  comprehension  uri  resource  modeling  hardproblems  complexity  insight  web  development  technology  naming  humanfactors  classification  resourcemodeling 
may 2007 by amaah
On IBM and Africa
Thinking aloud about IBM's initiative on innovation and economic development in Africa, some personal history, a case study and some analysis, your basic Saturday morning briefing notes...
IBM  Africa  technology  business  development  economics  strategy  history  culture  infrastructure  innovation  observation  analysis  computing  networks  pricing  ideas  modeling  thinking  internet  web  Ghana  GreatGame  LowEndTheory  toli 
may 2007 by amaah
Integrating Java Content Repository and Spring
JSR 170 traction perhaps? More folks joining in the fun... About time too.
data  jsr170  technology  persistence  programming  database  modeling  java  j2ee  Architecture  Design 
april 2007 by amaah
Internet Identity & the Public Notary
well, well, well. Ben Hyde on the notion of the digital notary public. Now there's an incentive for publishing the long gestating toli on the topic. Coordination, architecture for intermediaries, business models for middlemen. I'm all over this
forms  technology  identity  architecture  security  economics  modeling  incentives  tradeoffs  xforms  adoption  notary  middlemen  intermediaries  intermediation  systems  design  web  internet  authentication 
april 2007 by amaah
Crawl Before You Walk
It is striking that it is only in its fifth year of existence that a framework for building web applications is considering allowing bookmarking and might even use the HTTP GET method where applicable.
rest  technology  adoption  jsf  frameworks  design  architecture  web  http  forms  java  j2ee  platforms  rejection  pragmatism  resource  modeling  resourcemodeling  toli 
april 2007 by amaah
Java Server Faces (JSF) 2.0 proposal
5 years later and we finally see the following in the spec: "Allow for bookmarkable JSF pages. More broadly, if HTTP GET can be used, it should be used." I wrote that memo in 2002. Internalizing what it means to be on the web. Bookmarking, caching etc.
rest  design  jsf  frameworks  programming  web  java  sun  advocacy  standards  technology  uri  html  scripting  resource  modeling  resourcemodeling 
march 2007 by amaah
A Brief History of Generative Models for Power Law and Lognormal Distributions (pdf)
Michael Mitzenmacher's survey of distributions, see also the section titled Monkeys typing randomly... I wish I could say the classes he taught were as interesting as the papers he undoubtedly writes. If so I would be a far better engineer. Oh wist...
mathematics  networks  powerlaw  distribution  statistics  theory  modeling  filetype:pdf  media:document 
august 2006 by amaah
All XML roads leads to RDF
"The World is a Graph". The world can just be described wholistically as consisting of objects and relations between those objects. Take any object in the world, you will be able to reach any other object by following relations stemming from it. Make that
data  thinking  modeling  graph  design  xml  rdf  tree  technology  architecture  document  language  web 
august 2006 by amaah
Slicing and Dicing the Senate
The idea of this technique, “Optimal Classification Estimates”, is to reduce each legislator to two numbers and them pin them onto that graph. It’s extremely reductionist, but it works. The model is extremely accurate; around 95% these days. Amazing
visualization  economics  politics  modeling  strategy  voting  regulation  race  insight  decisions  usa 
august 2006 by amaah
right/left wing?
An economic model for predicting votes in American Congress throughout most of its history. It turns out that only 2 factors are needed to predict 95% of votes: 1. the regulation of commercial activity and 2 race.
economics  politics  modeling  strategy  voting  regulation  race  insight  decisions  usa  mathematics 
august 2006 by amaah
How To Design a Good API and Why it Matters (pdf)
Joshua Block's presentation on API design is a great resource. Someone needs to write a presentation as concise as this on resource modeling for REST to flesh out the elevator pitch. I sense a project.
software  java  architecture  design  development  programming  google  patterns  rest  todo  evolution  extensibility  modeling  resourcemodeling  filetype:pdf  media:document 
march 2006 by amaah
The REST Elevator Pitch
I consider HTTP a deliberately minimalist compromise, laissez-faire distributed computing if you will.
technology  rest  systems  software  design  architecture  advocacy  leverage  adoption  composition  tradeoffs  http  uri  xml  html  atom  web  toli  resource  modeling  resourcemodeling 
march 2006 by amaah
Reality and Tools - excerpt from Data and Reality
William Kent ruminates: Theories tend to distinguish phenomena. A theory tends to be analytical, carefully identifying all the distinct elements and functions involved. Unifying explanations are abstracted, relationships and interactions are described, bu
data  modeling  engineering  software  theory  practice  history  architecture  insight  frameworks 
february 2006 by amaah
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