Broad-Band Calorimeters for the Measurement of Low and Medium Level Microwave Power II.Construction and Performance

1958 ◽  
Vol 6 (2) ◽  
pp. 195-202 ◽  
Author(s):  
A.V. James ◽  
L.O. Sweet
Keyword(s):  
Microwave Power ◽  
Broad Band ◽  
Medium Level ◽  
And Performance

scholarly journals Final design and on-sky testing of the iLocater SX acquisition camera: broad-band single-mode fibre coupling

2020 ◽  
Vol 501 (2) ◽  
pp. 2250-2267
Author(s):  
J Crass ◽  
A Bechter ◽  
B Sands ◽  
D King ◽  
R Ketterer ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Near Infrared ◽  
Broad Band ◽  
Single Mode ◽  
Injection System ◽  
Single Mode Fibre ◽  
Astronomical Instruments ◽  
Final Design ◽  
Camera Design ◽  
And Performance

ABSTRACT Enabling efficient injection of light into single-mode fibres (SMFs) is a key requirement in realizing diffraction-limited astronomical spectroscopy on ground-based telescopes. SMF-fed spectrographs, facilitated by the use of adaptive optics (AO), offer distinct advantages over comparable seeing-limited designs, including higher spectral resolution within a compact and stable instrument volume, and a telescope independent spectrograph design. iLocater is an extremely precise radial velocity (EPRV) spectrograph being built for the Large Binocular Telescope (LBT). We have designed and built the front-end fibre injection system, or acquisition camera, for the SX (left) primary mirror of the LBT. The instrument was installed in 2019 and underwent on-sky commissioning and performance assessment. In this paper, we present the instrument requirements, acquisition camera design, as well as results from first-light measurements. Broad-band SMF coupling in excess of 35 per cent (absolute) in the near-infrared (0.97–1.31 ${\mu {\rm m}}$) was achieved across a range of target magnitudes, spectral types, and observing conditions. Successful demonstration of on-sky performance represents both a major milestone in the development of iLocater and in making efficient ground-based SMF-fed astronomical instruments a reality.

Broad-Band Internal Matching of Microwave Power GaAs MESFET's

1979 ◽  
Vol 27 (1) ◽  
pp. 3-8 ◽  
Author(s):  
K. Honjo ◽  
Y. Takayama ◽  
A. Higashisaka
Keyword(s):  
Microwave Power ◽  
Broad Band

Design and Performance of W-Band Broad-Band Integrated Circuit Mixers

1983 ◽  
Vol 31 (3) ◽  
pp. 277-283 ◽  
Author(s):  
R.S. Tahim ◽  
G.M. Hayashibara ◽  
Kai Chang
Keyword(s):  
Integrated Circuit ◽  
Broad Band ◽  
W Band ◽  
And Performance

scholarly journals Gender aspects of empathy in online learning of adolescents

2021 ◽  
Vol 12 (1) ◽  
pp. 314-321
Author(s):  
Nina Pidbutska ◽  
Yuliia Demidova ◽  
Anastasiia Knysh
Keyword(s):  
Online Learning ◽  
Online Courses ◽  
Learning Performance ◽  
Expert Assessment ◽  
Successful Performance ◽  
Learning Success ◽  
Study Results ◽  
Medium Level ◽  
And Performance ◽  
Different Levels

Aim. The aim of the article is to present the results of a study of gender-related features of the connection between empathy and performance of adolescents during online learning. The main objectives of the study are as follows: defining criteria for online learning success; holding expert assessment of success of online learning of adolescents; studying correlation between the level of empathy and success of online learning in groups of male and female. Methods. The study participants consist of 50 teenagers from a secondary school in Kharkiv (Ukraine) and their 10 teachers. The study uses the following methods: 1) expert assessment; 2) psychological testing (Mehrabian and Epstein Questionnaire); 3) statistical methods. The following is used for statistical data processing: descriptive statistics methods (to measure the percentage of people with different levels of empathy and different levels of online learning performance); Pearson's χ2 consistency criterion- (to compare data distributions in groups of female and male participants by all study indicators); Spearman's correlation analysis (to investigate the correlation between the level of empathy and the level of successful performance of online learning of adolescents). Results. During the study, the aim has been achieved and all the objectives have been fulfilled, in particular: 1) “involvement in online learning” and "quality of online learning" are defined as criteria for online learning successful performance; 2) expert assessment of the study results is carried out, allowing us to determine that female participants show mainly medium and high levels of online learning performance, while male participants show low and medium-level results; 3) it is determined that the correlation between the level of performance of online learning and empathy in the group of girls is higher than in the group of boys. Conclusions. The study shows that the development of online courses requires not only the use of modern technological and methodological approaches, but also taking into account the gender-related and personal traits of students.

Performance indicators in water and sanitation for developing areas

2001 ◽  
Vol 44 (6) ◽  
pp. 127-134 ◽  
Author(s):  
P. Pybus ◽  
G. Schoeman
Keyword(s):  
Performance Indicators ◽  
Local Community ◽  
Broad Band ◽  
Business Plan ◽  
Performance Criteria ◽  
Water And Sanitation ◽  
And Performance ◽  
Threatening Situation ◽  
Sanitation Systems ◽  
Developed World

There is a move throughout the developed world to introduce benchmarking techniques to the management of water and sanitation systems. The indicators that are being considered for benchmarking purposes tend to cover a broad band of activities that are part of the scope of management of large organisations. Most of the lists that have been prepared do not really cater for the implementation and operation of small rural schemes. The greatest need is the implementation of sustainable schemes for this category of consumer. The implementation of a rural water and sanitation scheme involves the negotiation in the initial stages with the local community representatives of what the community wants and how it will be provided and operated. This may have to be preceded by a period of empowerment so that the negotiations can be conducted by informed people. At the conclusion of the negotiations a business plan can be prepared that should be implemented in association with the community. The project is at this stage mainly in the control of a professional engineer, responsible for the technical interpretation of the business plan and the management of the construction phase. Finally, after commissioning, a water service provider will be responsible for the operation, management and maintenance of the scheme on a sustainable basis. The key actions and activities are identified and performance criteria defined. As communication at the beginning of the project is a critical component, the success of this is confirmed by examination and discussion as to how much has in fact been communicated and understood correctly. Other performance indicators for the operational phase are derived from the conventional ones used in the developed world. Finally, it is important that the participants, do not see the measurement of performance as a threatening situation, but rather a stepping stone to improvement of not only performance, but also of subsequent reward.

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