5,609 research outputs found
Measuring and analyzing German and Spanish customer satisfaction of using the iPhone 4S Mobile Cloud service
No full textThis paper presents the customer satisfaction analysis for measuring popularity in the Mobile Cloud, which is an emerging area in the Cloud and Big Data Computing. Organizational Sustainability Modeling (OSM) is the proposed method used in this research. The twelve-month of German and Spanish consumer data are used for the analysis to investigate the return and risk status associated with the ratings of customer satisfaction in the iPhone 4S Mobile Cloud services. Results show that there is a decline in the satisfaction ratings in Germany and Spain due to economic downturn and competitions in the market, which support our hypothesis. Key outputs have been explained and they confirm that all analysis and interpretations fulfill the criteria for OSM. The use of statistical and visualization method proposed by OSM can expose unexploited data and allows the stakeholders to understand the status of return and risk of their Cloud strategies easier than the use of other data analysis
Thermal Design of the Hyperspectral Instrument of the CHIME Mission
No full textVictor Cleren, European Space Agency(ESA), NetherlandsNiels Schibilla, OHB System, GermanyICES202: Satellite, Payload, and Instrument Thermal ControlThe 52nd International Conference on Environmental Systems was held in Calgary, Canada, on 16 July 2023 through 20 July 2023.The CHIME mission is the hyperspectral component of the European Union’s Earth Observation programme, Copernicus.
The CHIME mission consists of 2 satellites carrying as payload Hyperspectral Imagers (HSI). Each HSI is a high-performance pushbroom imaging spectrometer type of instrument recording ~130 km of swath at a 30 m x 30 m ground sampling distance. The spectral sampling interval is less than 10 nm, covering a continuous spectral range from 400 nm to 2500 nm. A high performance Three Mirror Anastigmat (TMA) type telescope with wide-band coated optics collects the light reflected from the ground and images it to three highly linear radiometric responsive and almost distortion-free spectrometers attaining very good spectral stability. All optical units are mounted to a torus-like carbon fiber (CFRP) optical bench structure providing the necessary line of sight stability. The electro-optical back-end is based on passively cooled Teledyne CHROMA-D digital readout detectors, cooled down to cryogenic temperatures.
The main objectives of the thermal control system are to 1) cool the detectors of the three focal planes down to 170 K, 2) maintain the optical pathway by keeping the temperature of the optics and the structure highly stable at 20 °C and 3) remove the heat from the detector acquisition electronics. Cooling the focal planes is a particular challenge, which is achieved passively by a baffled cryogenic radiator. The radiator is connected to the focal planes via a thermal chain using graphite thermal straps and ethane heat pipes.
CHIME will support a broad range of new and improved Copernicus services and applications, such as sustainable agricultural management, raw material and mineral resources management, food security and biodiversity monitoring. The satellite and its instrument have both passed their PDR (Preliminary Design Review) in 2022. The first CHIME satellite is planned to be accepted for flight in 2028
Thermal Testing of the Structural and Thermal Model of the HyperSpectral Instrument for the CHIME Mission
No full textVictor Cleren, European Space Agency (ESA), NetherlandsNiels Schibilla, OHB System AG, GermanyLudovic Outchet, Thales Alenia Space, FranceICES202: Satellite, Payload, and Instrument Thermal ControlThe 54th International Conference on Environmental Systems was held in Prague, Czechia, on 13 July 2025 through 17 July 2025.The CHIME (Copernicus Hyperspectral Imaging Mission for the
Environment) mission is a key component of the European
Union’s Earth Observation programme, Copernicus. The CHIME
satellite will carry a unique payload designed to provide
routine hyperspectral observations. Its HyperSpectral
Instrument (HSI) will acquire a continuous spectral
signature ranging from 400 to 2500 nm at a spatial
resolution of 30 meters. In 2024, the Structural and
Thermal Model (STM) of the HSI underwent thermal vacuum
testing, a crucial step towards the Critical Design Review
(CDR) scheduled for early 2025.
This paper presents the results of the STM thermal balance
test for the HSI, including thermal model correlation, and
the status of the thermal control design at CDR. The focus
is on key elements of the thermal control system, such as
the baffled passive cryogenic radiator, which cools three
separate focal planes to 170 K. The radiator is connected
to the focal planes via a cryogenic chain that utilizes
graphite thermal straps and ethane heat pipes.
During the STM thermal balance test, the cryogenic chain
exhibited higher-than-expected temperatures, prompting an
investigation into potential additional heat leak sources
within the instrument design and test equipment. This paper
will detail the findings of this investigation, the
performance of the ethane heat pipes under gravity
conditions, and the overall results of the thermal balance
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A Norwegian grey zone: Knut Rød, Victor Lind and 'The crucial year, 1942'
No full textThis article uses Primo Levi’s concept of “the grey zone” to explore Knut Rød’s involvement in the transfer of 532 Norwegian Jews from Oslo to Auschwitz in 1942. Rød, the police chief in charge of the operation, was subsequently exonerated of any crime on the grounds that he had simultaneously used his position to help members of Milorg – the Norwegian Resistance. The legal and moral basis of this verdict has been questioned by the artist Victor Lind in a series of artworks, including his “countermonument” The Perpetrator (2005)
Victor LaValle
No full textVictor LaValle is the author of the short story collection Slapboxing with Jesus, four novels, The Ecstatic, Big Machine, The Devil in Silver, and The Changeling and two novellas, Lucretia and the Kroons and The Ballad of Black Tom. He is also the creator and writer of a comic book Victor LaValle’s DESTROYER. He has been the recipient of numerous awards including a Whiting Writers’ Award, a United States Artists Ford Fellowship, a Guggenheim Fellowship, a Shirley Jackson Award, an American Book Award, and the key to Southeast Queens. He was raised in Queens, New York. He now lives in Washington Heights with his wife and kids. He teaches at Columbia University. The free, public program begins at 6:00 p.m. at Burns Belfry.https://egrove.olemiss.edu/grisham_vis/1002/thumbnail.jp
[Diary Entry for Saturday, April 13, 1940]
No full textThis page is part of a diary by Sir Ellice Victor Elias Sassoon. He wrote that he slept a lot and read a book about the Burma Road for which the author got the idea at his garden party in 1937. He then said he went to bed at 8 and that Edna came in to ask how he was
OneVerse Ache NT Dedication & Celebration: Dr. Victor Gomez
No full textVictor Antonio Gomez celebrates, dedicates, and shares about OneVerse’s translation of New Testament in the language of the Ache people.
Victor Antonio Gomez, Paraguayan, is married to Cristina Flores and has two daughters: Rocio (22) and Jazmin (Taylor ’16). He has a Ph.D. in theology and served as Baptist pastor and professor of several seminaries before becoming a Bible Translator for the Ache people and Director of LETRA Paraguay. Author and editor of several books, he also serves as Wycliffe Global Alliance Bible Translation Coordinator and Sub-director for the Americas
Letter from JV [John Victor] Carson, Dominguez Estate Company to J.S. Yoshinobu, June 3, 1938
No full textLetter making final request for information no Mr. Kuda's lease information. Signed by JV [John Victor] Carson
Unknown Anzac : and other poems / by Victor Kennedy.
No full textElectronic reproduction. Canberra, A.C.T. : National Library of Australia, 2012.; Library's Whelan copy inscribed and signed by the author
An Introductory Approach to Risk Visualization as a Service
No full textThis paper introduces the Risk Visualization as a Service (RVaaS) and presents the motivation, rationale, methodology, Cloud APIs used, operations and examples of using RVaaS. Risks can be calculated within seconds and presented in the form of Visualization to ensure that unexploited areas are ex-posed. RVaaS operates in two phases. The first phase includes the risk modeling in Black Scholes Model (BSM), creating 3D Visualization and Analysis. The second phase consists of calculating key derivatives such as Delta and Theta for financial modeling. Risks presented in visualization allow the potential investors and stakeholders to keep track of the status of risk with regard to time, prices and volatility. Our approach can improve accuracy and performance. Results in experiments show that RVaaS can perform up to 500,000 simulations and complete all simulations within 24 seconds for time steps of up to 50. We also introduce financial stock market analysis (FSMA) that can fully blend with RVaaS and demonstrate two examples that can help investors make better decision based on the pricing and market volatility information. RVaaS provides a structured way to deploy low cost, high quality risk assessment and support real-time calculations
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