Dört terminal çift kapasitans standartlarının 30’mhz’e kadar karakterizasyonu için yeni bir yöntem

06.03.2018 tarihli ve 30352 sayılı Resmi Gazetede yayımlanan “Yükseköğretim Kanunu İle Bazı Kanun Ve Kanun Hükmünde Kararnamelerde Değişiklik Yapılması Hakkında Kanun” ile 18.06.2018 tarihli “Lisansüstü Tezlerin Elektronik Ortamda Toplanması, Düzenlenmesi ve Erişime Açılmasına İlişkin Yönerge” gereğince tam metin erişime açılmıştır.Elektriksel metrolojide frekans bölgesi temel olarak üç ana bölgeye ayrılır. Doğru akımdan 100 kHz'e kadar olan bölgeye LF (Low Frequency) 100 kHz – 1 GHz arası bölge RF (Radio Frequency) ve 1 GHz – 100 GHz arası bölge MW (Microwave Frerequency) olarak adlandırılır. Literatürde farklı adlandırmalar olsa da burada yapılan ayrım temel olarak metrolojik izlenebilirlik zincirinin ayrıldığı bölge açısından değerlendirilmektedir. LF ve RF arası bölge LF-RF boşluk olarak adlandırılmakta ve bu bölgede metrolojik izlenebilirlik sorunun çözülmesi için ulusal metroloji enstitüleri tarafından çalışmalar yürütülmektedir. Bu frekans bölgesinde RLC metreler, güç algılayıcılar, network analizörler gibi ticari cihazlar ölçüm yapabilmekte ve düşük ölçüm belirsizliklerine ihtiyaç duymaktadır. Haberleşme, ilaç, otomotiv, havacılık, tıbbi analiz ve görüntüleme cihazları, uzay çalışmaları ile spektroskopik yöntemle malzeme analizinde bu bölgede alınan ölçümler yaygın olarak kullanılmaktadır. Ticari olarak pazarda fazla sayıda cihaz olmasına karşın firmaların belirttiği doğruluk limitlerini güvenilirlik altına alacak bir izlenebilirlik zinciri kurulabilmiş değildir. Firma ve yöntem bağımlılığı mevcuttur. Ayrıca herhangi bir uluslararası karşılaştırma düzenlenmiş değildir. Bu çalışmada 1 pF – 1000 pF aralığında hava dielektrikli dört terminal çift (4TP) Agilent 16380A kapasitans standartlarının 30 MHz'e kadar karakterize edilebilmesi için yeni bir yöntem geliştirmiştir. Bu yöntem 4TP hava dielektrikli kapasitans standartlarının tüm artık indüktans parametrelerinin rezonans frekanslarından belirlenmesine dayanmaktadır. Bu rezonans frekansları 500MHz'e kadar Vektör Netvörk Analizör ile elde edilen saçılma parametreleri kullanılarak elde edilen empedans ve admitans değerleri ile hesaplanmıştır. Bu çalışmada elde edilen sonuçlar ve yayınlar neticesinde Türkiye Bilimsel ve Teknik Araştırma Kurumu (TÜBİTAK) Ulusal Metroloji Enstitüsü (UME) yüksek frekans kapasitans ölçümleri alanında Uluslararası Ölçüler ve Ağırlıklar Bürosu (BIPM) veri tabanına yeni bir CMC satırı ekleyerek Türkiye'nin bu alandaki uluslararası izlenebilirliğini sağlanmıştır.Frequency region in the electrical metrology is mainly divided by three ranges. According to the frequency region, frequency ranges are entitled as Low Frequency (LF), Radio Frequency (RF) and microwave (MW). Beginning from DC to 100 kHz range is called as LF, 100 KHz - 1 GHz is called as RF and 1 GHz – 100 GHz is called as MW. Despite of different classifications in the literature, this nomination is mainly based on metrological traceability chain researches. Region between LF and RF is named as LF-RF gap. In order to solve this problem several research project have been performed by national metrology institutes. Commercial devices like, RLC meter, power detectors, network analyzer, etc. can take measurements in this frequency range and demands better measurements uncertainty. Measurements taken in the LF-RF gap region are widely used in, medical analysis, medical monitoring devices, drug developments and productions, automotive, aviation, space, spectroscopic material analysis and. communication sector. Although numerous devices are avialable in the market, in order to reach accuracy limits declared by companies' confidence traceability chain has not been established. Moreover, calibration methods are company and method dependent. Besides that, international inter-comparison has not been organized. In this work, in order to characterize Agilent air dielectric four terminal pair (4TP) 16380A capacitance standards between the ranges 1 pF – 1000 pF up to 30 MHz, a new method has been developed. The method is based on determination of the residual inductance parameters of the 4TP air dielectric capacitance standards from resonance frequencies. These resonance frequencies up to 500 MHz have been calculated from impedance and admittance values derived from S parameter measurements taken by vector network analyzer. International traceability of high frequency capacitance measurements of Turkey has been established by results of this work. The Scientific And Technological Research Council of The TURKEY (TÜBİTAK) National Metrology Institute (UME) has added a new Calibration and Measurement Capabilities (CMC) into BIPM (Bureau International des Poids et Mesures) database

The Telecommunications and Data Acquisition Report

Archival reports are given on developments in programs managed by JPL's Office of Telecommunications and Data Acquisition (TDA), including space communications, radio navigation, radio science, ground-based radio and radar astronomy, and the Deep Space Network (DSN) and its associated Ground Communications Facility (GCF) in planning, supporting research and technology, implementation, and operations. Also included is TDA-funded activity at JPL on data and information systems and reimbursable DSN work performed for other space agencies through NASA. In the search for extraterrestrial intelligence (SETI), implementation and operations for searching the microwave spectrum are reported. Use of the Goldstone Solar System Radar for scientific exploration of the planets, their rings and satellites, asteroids, and comets are discussed

Abstracts on Radio Direction Finding (1899 - 1995)

The files on this record represent the various databases that originally composed the CD-ROM issue of "Abstracts on Radio Direction Finding" database, which is now part of the Dudley Knox Library's Abstracts and Selected Full Text Documents on Radio Direction Finding (1899 - 1995) Collection. (See Calhoun record https://calhoun.nps.edu/handle/10945/57364 for further information on this collection and the bibliography). Due to issues of technological obsolescence preventing current and future audiences from accessing the bibliography, DKL exported and converted into the three files on this record the various databases contained in the CD-ROM. The contents of these files are: 1) RDFA_CompleteBibliography_xls.zip [RDFA_CompleteBibliography.xls: Metadata for the complete bibliography, in Excel 97-2003 Workbook format; RDFA_Glossary.xls: Glossary of terms, in Excel 97-2003 Workbookformat; RDFA_Biographies.xls: Biographies of leading figures, in Excel 97-2003 Workbook format]; 2) RDFA_CompleteBibliography_csv.zip [RDFA_CompleteBibliography.TXT: Metadata for the complete bibliography, in CSV format; RDFA_Glossary.TXT: Glossary of terms, in CSV format; RDFA_Biographies.TXT: Biographies of leading figures, in CSV format]; 3) RDFA_CompleteBibliography.pdf: A human readable display of the bibliographic data, as a means of double-checking any possible deviations due to conversion

NBS monograph

From Abstract: "This is a tutorial Monograph describing various aspects of time and frequency (T/F). Included are chapters relating to elemental concepts of precise time and frequency; basic principles of quartz oscillators and atomic frequency standards; historical review, recent progress, and current status of atomic frequency standards; promising areas for developing future primary frequency standards; relevance of frequency standards to other areas of metrology including a unified standard concept; statistics of T/F data analysis coupled with the theory and construction of the NBS atomic time scale; an overview of T/F dissemination techniques; and the standards of T/F in the USA. The Monograph addresses both the specialist in the field as well as those desiring basic information about time and frequency.

Introduction to Particle and Astroparticle Physics : Multimessenger Astronomy and its Particle Physics Foundations -2/E

This book introduces particle physics, astrophysics and cosmology starting from experiment. It provides a unified view of these fields, which is needed to answer our questions to the Universe–a unified view that has been lost somehow in recent years due to increasing specialization. This is the second edition of a book we published only three years ago, a book which had a success beyond our expectations. We felt that the recent progress on gravitational waves, gamma ray and neutrino astrophysics deserved a new edition including all these new developments: multimessenger astronomy is now a reality. In addition, the properties of the Higgs particle are much better known now than three years ago. Thanks to this second edition we had the opportunity to fix some bugs, to extend the material related to exercises, and to change in a more logical form the order of some items. Last but not least, our editor encouraged us a lot to write a second edition. Particle physics has recently seen the incredible success of the so-called standard model. A 50-year long search for the missing ingredient of the model, the Higgs particle, has been concluded successfully, and some scientists claim that we are close to the limit of the physics humans may know

High Energy Physics

This grant covered an umbrella program of research in high-­‐energy particle physics at Southern Methodist University during the period 2004-­‐2013. The experimental program evolved during that time. At its early stages it included research on the CLEO experiment at CESR (Coan, Stroynowski, Ye), D0 experiment at Tevatron (Kehoe), preparation for the BTEV experiment at Fermilab (Coan) and construction and commissioning of the Liquid Argon Calorimeter for the ATLAS experiment at LHC (Stroynowski, Ye). In the last three years the program concentrated on the ATLAS experiment at LHC (Kehoe, Sekula, Stroynowski, Ye), D0 experiment at Tevatron (Kehoe) and NOvA experiment at Fermilab (Coan). Professor Sekula had a short-­‐term independent grant for which he is submitting a separate report. The theoretical physics program included work on non-­‐perturbative methods in the light cone representation (McCartor (deceased)), lattice calculations (Hornbostel), and determination of parton distribution functions (Olness). A summary of the accomplishments emphasizing results from the past three years is provided separately for each of the tasks