Gothenburg letters

Double espresso in a lifeboat cup stands on the table as a symbol of thought process overture. Years and years of this addiction, morning to morning cycle of roasted bean - flavored days. Same as the music, coffee gives special taste to life. Sad as it is, that is the fact of how most of us live. We try to color life, paint it every day with something to occupy our senses. As if we live in the void, without any a priori notion with sole purpose of being artists of our own lives.

Therefore, art seems like the ultimate measure of all things. Some of it just exists by itself, some of it was given birth by others and some of it is simply our burden to create.

Consider sailing. Muscles of bearded men against the power of the wind and wrath of restless sea. Meaningless white arcs as mere dots in this grandiose infinity. Isn't this helplessness the ultimate expression of beauty-seeking soul ?

The coffee boat is nearly empty and senses are getting dry. White seagull traverses Nordstaden bay as he continues to draw lemiscates in the sky.

Berlin ex post

Days have passed since leaving the Tegel terminal chasing desperate bits of tmobile wifi. Sitting on the shores of magnigicent Adriatic, the scroll of iPod playlist passes over David Bowie's Heroes ... and I can't help it. Press play and it all comes back.

The lonely walk across Checkpoint Charlie. Cynical smile on tourist hordes in desperate pursuit for vanity photos and "I was there" badges. Takeaway pieces of the Wall and nights lost in oblivion. The giant celebration of long awaited victory. The triumph. The prize.

Yet, the truth is only a mile away on the east. As we pass the gate of triumph, past beyond collectible shops,we still see the same despair, the same abandoned wasteland in ideology of nothingness. The new Wall arises. The Ghetto. Void souls traversing the same ex-Lennian minimalism convinced that they live in modern-day utopia.

It seems that, once there was a hope here. A genuine feeling. A living life. Yet, what I see now is a synthetic fiber of modern-day self-admiration, in a world that elevates not caring about anything to mankind's ultimate purpose.

And once again, the cycle of life. Morning rays tear down the short summer night. The Tower turns it's lights off and morning glory is reflected on it's chrome sphere. Everyone is still awake, enjoying the Prize. Tired of nightmares chasing me on my computer anywhere I go, in a desperate attempt to escape, I join the oblivious hordes and pursuit salvation in my morning sleep.

Berlin dawn :: 4am songbook

||| blinkenlights of television tower under the delicate smile of newborn moon.

... across pale reminiscents of dark ages. |||

||| under the skyline of despair.

... filled with memories of hope. |||

the daytime mist arrives.

Continuo

Avro gateway 101.

LED Despair

In-memory Hadoop tasks. Long silence of jet lag memory. Delayed arrival of soul. Again.
The Interview.

Plastic Cocoon

White leather in baby-boomer era shop. Explosion of "input" throughout 60 years of scientific computing.

Design of modern econometric software interface. Simultaneous equations, macro variables. Solving large systems. Detecting feedback loops in online dynamics using voidbase. Tweets/topic frequency, news, trends. Automatic model-building and hypothesis testing.

Treating website management as policymaker problem ? Macroeconomic models of website user dynamics ? Closed economies + controlled foreign trade.

Marching life

Grand Pleasures with yellow light bulbs. Taste of espresso summoning from the long tranquil. Single entry on a vacancy of four.

The big rewind

Efficiency and models of virtual economies. Gold Farming and implications of investment-free outsourcing. Property testing and Szemerédi regularity lemma.

Voidbase queue persistence via Apache Avro. Streams not closing, cursor advance errors. Abuse EOFException to create Iterator. Handbook of Computational Econometrics on the bench. Elements revisited. Euclid's ideas as edifice of modern thought.

EDSAC and glory days of Econometrics at Cambridge. The dawn of Mark I era. Stressing the Klein-Goldberg model.

Diaries Of Recycled Helix

Distributed transactional log service. Lustre node failure handling. Traveling.

Facebook Scribe in action. Simple referent netty implementation. Eventual consistency by lazy map/reduce merging of independently-persisted queue data. Quick&Dirty java memcached client. Grand unified service stats tracking protocol.

Solid finale.

The Blueprint

Nuclear DNA. Eternal polymers and all the chemistry. Majestic carbon, in vitro.

C:H:O:N:S | amino acids as protein building blocks. Insulin as amino mix. Tape sequence analysis. Turing machine. Thymine facing adenine, guanine versus cytosine. Perpetual oppositions. Redundancy in service of O(1) replication.

Infinite string matching. Palindromic nature. DNA -> protein translations. Organic lookup tables. Bill Evans, Waltz for Debby. Bitter frost of the expectant spring. Error-Correcting codes ? Calling Shannon ... .

The low-hanging fruit. Heraclitus redux.

Doubt Regression

Thursday morning. Not exactly what The Pogues were saying. Chicken-and-egg situations in project builds. Again.

My .net / j2ee soap interoperability sorrow: Web Services Interoperability Soup.

N-way layered abstraction waffle. Antifolk. Transactional logging.

Creating Context

Ground-level pity clouds. Two days chasing red line. What was won soon was lost. Curse of the machine comes at the cost. Estimating local dimension. Training procedure by benchmarking on artificially-generated noisy scenarios. "All warfare is based on deception". Safety ? Is that the ultimate goal ?

JAX-WS, again :/

Mean Reversion

Tech rebound, the news say. Vast armies of savvy investors ready to pitch their dollar for the signs of hope for the next big one.

Reflecting on the 2009 djia. No wonder Goldman had such a spectacular year - the big rebound started in at Mar 06. From 6626.94 rock bottom to 10k dow in mid-October. It could have been a bad year only for illiquid ones. But, let's see what happens now when the bear had arrived. Funny businessweek article. - breed 'em then buy 'em is a great model, but what about moral hazard implications ?

Fluctuating economy. No rock to stand on. The next best things is finding right angle confluence of laminar flows.

The Risiko board game. Growing cultures behind closet doors, the corporate glass gardens. Microcosms of it's own. Additivity taxonomies for base set of random variable statistics. In search of a reference. Covariance - raison d'être of portfolio theory.

Scattered particles filling the void. An empty promise. A glimpse of hope. At least the Liar's Poker is over.

Continuum Beanbag Revisited

Alternative risk measures. Bond duration limits. One size doesn't fit all. Apples and Oranges Lemma.

Goodbye Pork Pie Hat. Computational complexity of financial products. Intractability of portfolio-product decomposition. Reverse the efficient set. Duration-based bond selection. International Finance discussions. Monte Carlo methods for bond default analysis.

More efficient sets. Jensen-Renyi Divergence. It never entered my mind. Big questions. Markowitz's mean-variance analysis. Central Park West. Not a good day for staying focused. Irrational promises of seemingly endless weekends.

Subadditivity of asset variances. Reflections of George Polya and student days on vintage wood beneath the green lights. Cheap Russian translations of academia masterpieces. MIT WWII-supply Electromagnetic textbooks on war-reserve recycled paper. Obsolete vacuum structure theories. Maxwellian reality.

Deadline Superhighway

Thought monologue. Finding correlations in data when there aren't any. It's harder when you even can't do that. Heavily biased data sets.

Static portfolio allocation with continuous changes in asset covariance ? Evolution of indifferent-to-distribution investor idea. Pursuit for "real" risk measure. Unfortunately it's probably investor-specific. Economic theory is not happy with such things. Socially responsible investing, anyone ? Required minimum levels ?

Simple Hadoop reporting framework for the masses. Cutting's "big spreadsheet" idea. Continuum bean bag.

More axis fun. Eternal compatibility struggle. Revenge of WS-Addressing. Mapping return codes to wsdl.

Big data. Seeking rho. Still in need of convenient ad hoc analysis solution. R as eternal de facto. Getting used to 0.20 API Context Objects.

There it goes again

The Smiths on the radio. Grey morning heading for the afternoon. Messaging ways. Enterprise integration patterns.

Collisions in java logging forest. Interoperability, people ? Better projects do help development, but in the long run they might create unfair competition. Software projects economy. Jetty centralized slf4j logging colliding with qpid invoking slf4j directly. Collapse occurs. Loggers killed the application embedding. Quick hack - replacing slf4j-log4j with slf4j-simple. That's that. There are more interesting problems awaiting.

Dealing with confusions of async message delivery. Queue-driven runtime. Indexing dynamic data sources ? Controlled environment for thread handler execution. Long lost microseconds on the blocked threads highway. Visions of the times from long before. Yet, they are still waiting.

Finishing the pipeline. How do we address testability ? XML in the fast lane. Loosing a bracket here and there. Won't work, we do care. Marshalling sql updates. Full cycle. Discussing the world and the limits of expectations. Desire to belong to imagined perfect world just to realize that the real one don't seem worth dreaming. Still, start scratching the surface and bricks occur. The decaying plaster.

Following Hadoop steps. Giant footprints in data mud.

Implied Latency

Last minute evasive maneuvers. Simple return types. Builder pattern in partial object creation. The right tool for the job. Walking back down the UML boulevard. Small joys with yUML. Visual Paradigm UML seems like a serious OS/X option. Indent wars.

Picking battles. Sometimes a bit abstraction with no particular reason can be good. An unexpected offer. Quite pleasing. Alternative take on Builder pattern.

Betrayed by IntelliJ IDEA. Never undo refactoring if the original sources weren't committed! Swapping objects. Finding suitable home for classes used among packages. Dependency clash. Safety when converting to local classes, even if it took manual bean coding time. Spring cold kicking in. XML serialization for queue messages.

Back to qpid/jms. Vintage soundtracks. Dreams from far away. Logging too verbose. Difficulties with servlet JNDI. AMQNoRouteException. Back to queue troubleshooting. Yet, for another day.

Quiet Slipstream

Infrastructure updates. Troubled by AXIS2-3017. Street murmur. Having trouble stating the obvious. Portfolio selection vs futures position for profit lockdown ? Discussing distributed filesystem solutions for simplifying the design of replicated-data-store. Additional constraint of high availability and only tolerance for partial data access failures. Plus requirements to allow storage of large number of small files. Tricky. Lustre seems like a promising candidate. Time waits for no man.

Turing completeness of queue-based computation. Becoming regular reader. Message to Object demultiplexing. Sill working on compatibility issues. JAXB to the rescue. POJO-XML serialization model has dramatic limitations. Finally ended up with doing the thing semi manually. At least it's over.

Friendly talks with drunk walkers at Knez Mihajlova street.

Midtown Music

Spring preview in the streets. Pure bliss. Increasing entropy of the coffee shop. The eternal pursuit for the front view. Small things as contemporaries in the substance chronicles. Illustrations of the Curse. Diminishing distances with dimensionality increase. Combinatorial explosion of model-space. Increasing multicolinearity probability.

Fitting local structure of function. Simple mahout dimension-decomposition job. Locally-low dimension of function. 1-cube in pow(R,10) - seems Gaussian to a naked eye. General framework for estimating default risk by variable selection from media sources. Integrate mahout lib functions to voidbase for realtime/batch infrastructure.

Mixing queueing and state maintenance. Direct POST to soap service. Assuming all message conventions are satisfied, it should work right away. Deserialization will cause issues. All you need is a properly formatted soap message, raw post, and there you go. Stay away from complex xml types.

Fahey's strings. Deciphering fragments of autogenerated code. Axis2 Java Bean camelCase conventions on xml elements. No interoperability with legacy .net apps. Much Ado About Nothing.

Sidewalk daydreaming

Macaulay's bond duration factor. Times spread the unemployment fear. Summoning the Depression. The Great one. Because bleakly zeitgeist is better then searching for truth.

To bonds, my friends! Critics of interest rate sensitivity metrics. Getting unbiased sample from heavily biased data. Using derived measures which are not obtained via one-to-one mapping can result in data loss. Using such values for comparison of two values is only applicable if the transformations are linear. Equivalent measures. Looking at yield curves, historical bond prices.

Token filters. Having to recreate index with each change promotes predicting future at design-time. Feed mixing troubles. The revenge of monolithic renderer. Make sure to force modularity next time, even for trivial cases.

Blue in Green. The essential Miles at midnight. Continuous compounding requires reinvesting in the same or equivalent bond. However, prices change with time. Flamenco Sketches. Sound transforming the void. Spot rates - quite a clever one. No arbitrage argument in determining forwards. Assessing the bond default risk. Companies too complex to be evaluated by Moody's. Reducing everything to cash flow analysis does prevent creative business. Evading the trap by not issuing bonds. But are there enough individual "creative" investors that can provide necessary funds ?