Results 11 to 20 of about 41,812 (247)

Traveling Ionospheric Disturbances Characteristics during the 2018 Typhoon Maria from GPS Observations

open access: yesRemote Sensing, 2020
Typhoons often occur and may cause huge loss of life and damage of infrastructures, but they are still difficult to precisely monitor and predict by traditional in-situ measurements.
Yiduo Wen, Shuanggen Jin
doaj   +1 more source

Effect of Temperature Tuning on Diode Laser Performance [PDF]

open access: yesEngineering and Technology Journal, 2009
In this work, an expermental study on wavelength tunning for diode laser adopting temperature behavior varition process is carried out .Temperature effect on the characteristics of a stripe Double Heterostructure CW (GaAlAs) diode laser is shown .
Zainab T. Hussain, Adawiya J. Haider
doaj   +1 more source

Thermomechanical Analysis of Various Solid-oxide-fuel-cell Components Using Simple Analog Micrometer Measurements

open access: yesMakara Journal of Science, 2020
The solid oxide fuel cell (SOFC) is a device that can convert the energy stored in gaseous chemicals such as hydrogen into electricity. Because SOFCs are operated at high temperatures, their structures must be stable and durable.
Yoga Trianzar Malik   +2 more
doaj   +1 more source

Multi-instrument study of longitudinal wave structures for plasma bubble seeding in the equatorial ionosphere

open access: yesEarth and Planetary Physics, 2021
Large Scale Wave Structures (LSWS) in the equatorial ionospheric F-region were observed by measuring spatial and temporal variations within detrended total electron content (dTEC) data obtained by ground-based GNSS receivers over the South American ...
H. Takahashi   +8 more
doaj   +1 more source

Nechama Tec

open access: yesZagłada Żydów. Studia i Materiały, 2023
Nechama Tec urodziła się w 1931 r. w rodzinie Bawników, od kilku pokoleń mieszkającej w Lublinie. Ojciec Roman miał dwie nieduże fabryki, matka Estera zajmowała się domem. Nechamę już w dzieciństwie interesowali inni ludzie. Do- pytywała dlaczego, co i w jaki sposób robili.
Karolina Panz, Małgorzata Melchior
openaire   +2 more sources

Design of Thermoelectric Peltier Effect Demonstrator using Modul TEC-12706 and TEG-SP1848

open access: yesPhysics Education Research Journal, 2023
Thermoelectric devices have several advantages, including no moving parts, noise-free operation, long service life, zero-emission, and precise temperature control.
Fachrizal Rian Pratama, Vierta Saraswati
doaj   +1 more source

Estimativa e Propagação de Valores de DCB C1C-C2W de um Receptor GPS com Vistas a Correção de Ordem Superior do Efeito Ionosférico

open access: yesRevista Brasileira de Cartografia, 2020
Quando se almeja maior acurácia no posicionamento GNSS, é imprescindível a correção dos efeitos de ordem superior da refração ionosférica. O erro associado à ionosfera é diretamente proporcional ao conteúdo total de elétrons (Total Electron Content – TEC)
Fabiane Piovesan de Moraes Cordeiro   +2 more
doaj   +1 more source

Improving word embeddings in Portuguese: increasing accuracy while reducing the size of the corpus [PDF]

open access: yesPeerJ Computer Science, 2022
The subjectiveness of multimedia content description has a strong negative impact on tag-based information retrieval. In our work, we propose enhancing available descriptions by adding semantically related tags. To cope with this objective, we use a word
José Pedro Pinto   +3 more
doaj   +2 more sources

Evaluation of Hands-Free VR Interaction Methods During a Fitts’ Task: Efficiency and Effectiveness

open access: yesIEEE Access, 2023
Currently, it is standard to use tracked handheld controllers for interaction in immersive virtual reality (VR). However, since VR interactions are becoming more natural with hand tracking, it is important to provide hands-free alternatives for selection
Pedro Monteiro   +4 more
doaj   +1 more source

Ionospheric response to AGW propagation detected using GNSS measurements and coherent sounding over “Vernadsky” and “Palmer” Antarctic stations

open access: yesУкраїнський антарктичний журнал, 2017
The work presents results of the diagnostics of travelling ionospheric disturbances (TIDs) over the Antarctic Peninsula obtained by using two different techniques. The first method is based on ground-based multi- positional GNSS TEC measurements, and the
A. A. Sopin   +7 more
doaj   +1 more source

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