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Challenges for Measuring Multichip LED Light Engines for Interior Lighting Applications
As LED systems have been evolving today in a
great number of niche applications including
automotive lighting, water purification, and skin
imaging etc., extensive studies of scientists and
engineers in the field have been constantly
looking for ways to reduce generated heat loads
and maximize the light output to reach the highest
efficiency ratios. While the current systems
developed over the last years achieved to reach
even a 40% LED light efficiency, a higher portion
of the electrical input energy of LEDs is still
produced as heat and it hinders their development
potential. In addition, the compact size of the LED
systems poses some challenges to the reliable
characterization of their performance at low
uncertainties. Especially, the performance
considerations associated with thermal loads over
a limited size of LED chips require the effective
characterization of these systems for various
operational conditions. One of the techniques
used for this purpose is that an LED package is
characterized by a decrease in forward voltage
with increasing junction temperature. As LEDs are
operated at higher junction temperatures, the
amount and quality of the light deteriorates
significantly, and the less efficient use of the LEDs
results in additional operating costs and reduced
lifetime of LEDs. In fact, accurate identification of
thermal behavior of LED packages is one of the
essential tasks towards improving the design of
LED systems. If thermal characterization of LEDs
is accurately done, performance parameters of
LED packages are more reliably optimized to yield
the highest possible performance ratios. Thus,
this study focused on the design and
manufacturing of a thermally improved and fully
operational rapid temperature controllable
chamber in which calibration and test phases of
junction temperature measurements are
sensitively conducted under a low uncertainty.
Mete Muslu

Application of Diffraction-based Optical Components in Advanced Lighting Systems
In this paper novel approaches to optical beam shaping for lighting systems are presented. Application of various computer generated micro/nano-structured optical components is discussed.
Skeren Marek

NBD-NIR
NBD-NIR report
Mattia Anzola

Kgomotso Julian Sebitlo's CV
Kgomotso Julian Sebitlo's CV. Created with the AltaCV template.
KG

MINERA DE DATOS APLICADA A LA INGENIERA
En este ensayo se expondr aspectos de la minera de datos orientada a la ingeniera, y como durante el
tiempo su uso nos ha beneficiado de manera conveniente,
volviendo tareas tediosas y complejas, algo fcil y casi automatizada, un proceso que se fue adaptando conforme se
iban requiriendo nuevas tecnologas ya que cada vez van
surgiendo datos ms complejos y una forma que pudiera interpretar este tipo de datos, algo que le exigi evolucionar junto
con este tipo de datos y adaptarse al da a da, volvindose
algo casi fundamental para todo tipo de empresas que interactan con grandes cantidades de datos requieren emplear de
la minera de datos, ya que de la manera antigua quizs no logren objetivos tan eficaces y de manera rpida, pasando de un
proceso desconocido a algo que la mayora de empresas emplean actualmente, actualmente es un proceso que va de la
mano con prcticas como la analtica, un proceso que las empresas que requieren saber de qu es eficaz y que no, tienen
que hacer uso de estos si o si.
nicolas

ВЛИЯНИЕ ТЕНЗОРНОГО ВЗАИМОДЕЙСТВИЯ НА СКОРОСТИ БЕТА-РАСПАДА И ЗАХВАТА ЭЛЕКТРОНОВ НАГРЕТЫМИ ЯДРАМИ
Master's thesis at the Moscow State University: Effect of tensor interactions at beta decay and capture speed electrons with heated nuclei
S.Sidorov

Extensive LaTeX Guide
Provides an Extensive Guide to LaTeX along with the source code. This provides a template for documentation.
Armin Dubert

Bert de Vries's CV
Bert de Vries's CV
Bert de Vries

Aymen Kefi's CV
Aymen Kefi's CV. Created with the USA STEM CV template.
Aymen Kefi