Готові списки джерел за темами / NIST STS

Добірка наукової літератури з теми "NIST STS"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "NIST STS"

1

Yang, Xian-wei, Xue-qiu Zhan, Hong-juan Kang, and Ying Luo. "Fast Software Implementation of Serial Test and Approximate Entropy Test of Binary Sequence." Security and Communication Networks 2021 (September 16, 2021): 1–10. http://dx.doi.org/10.1155/2021/1375954.

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Анотація:
In many cryptographic applications, random numbers and pseudorandom numbers are required. Many cryptographic protocols require using random or pseudorandom numbers at various points, e.g., for auxiliary data in digital signatures or challenges in authentication protocols. In NIST SP800-22, the focus is on the need for randomness for encryption purposes and describes how to apply a set of statistical randomness tests. These tests can be used to evaluate the data generated by cryptographic algorithms. This paper will study the fast software implementation of the serial test and the approximate entropy test and propose two types of fast implementations of these tests. The first method is to follow the basic steps of these tests and replace bit operations with byte operations. Through this method, compared with the implementation of Fast NIST STS, the efficiency of the serial test and approximate entropy test is increased by 2.164 and 2.100 times, respectively. The second method is based on the first method, combining the statistical characteristics of subsequences of different lengths and further combining the two detections with different detection parameters. In this way, compared to the individual implementation of these tests, the efficiency has been significantly improved. Compared with the implementation of Fast NIST STS, the efficiency of this paper is increased by 4.078 times.
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2

Mamun, Md Selim Al, and Fatema Akhter. "Pseudo Random Binary Sequence Based on Cyclic Difference Set." Symmetry 12, no. 8 (July 22, 2020): 1202. http://dx.doi.org/10.3390/sym12081202.

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With the increasing reliance on technology, it has become crucial to secure every aspect of online information where pseudo random binary sequences (PRBS) can play an important role in today’s world of Internet. PRBS work in the fundamental mathematics behind the security of different protocols and cryptographic applications. This paper proposes a new PRBS namely MK (Mamun, Kumu) sequence for security applications. Proposed sequence is generated by primitive polynomial, cyclic difference set in elements of the field and binarized by quadratic residue (QR) and quadratic nonresidue (QNR). Introduction of cyclic difference set makes a special contribution to randomness of proposed sequence while QR/QNR-based binarization ensures uniformity of zeros and ones in sequence. Besides, proposed sequence has maximum cycle length and high linear complexity which are required properties for sequences to be used in security applications. Several experiments are conducted to verify randomness and results are presented in support of robustness of the proposed MK sequence. The randomness of proposed sequence is evaluated by popular statistical test suite, i.e., NIST STS 800-22 package. The test results confirmed that the proposed sequence is not affected by approximations of any kind and successfully passed all statistical tests defined in NIST STS 800-22 suite. Finally, the efficiency of proposed MK sequence is verified by comparing with some popular sequences in terms of uniformity in bit pattern distribution and linear complexity for sequences of different length. The experimental results validate that the proposed sequence has superior cryptographic properties than existing ones.
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3

Stoller, Scott, and Kristy A. Campbell. "Demonstration of Three True Random Number Generator Circuits Using Memristor Created Entropy and Commercial Off-the-Shelf Components." Entropy 23, no. 3 (March 20, 2021): 371. http://dx.doi.org/10.3390/e23030371.

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In this work, we build and test three memristor-based true random number generator (TRNG) circuits: two previously presented in the literature and one which is our own design. The functionality of each circuit is assessed using the National Institute of Standards and Technology (NIST) Statistical Test Suite (STS). The TRNG circuits were built using commercially available off-the-shelf parts, including the memristor. The results of this work confirm the usefulness of memristors for successful implementation of TRNG circuits, as well as the ease with which a TRNG can be built using simple circuit designs and off-the-shelf breadboard circuit components.
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4

Бабенко, Віра Григорівна, Тетяна Василівна Миронюк та Геннадій Васильович Кривоус. "АЛГОРИТМИ ЗАСТОСУВАННЯ ОПЕРАЦІЙ ПЕРЕСТАНОВОК, КЕРОВАНИХ ІНФОРМАЦІЄЮ, ДЛЯ РЕАЛІЗАЦІЇ КРИПТОПЕРЕТВОРЕННЯ ІНФОРМАЦІЇ". Вісник Черкаського державного технологічного університету, № 3 (22 жовтня 2021): 44–58. http://dx.doi.org/10.24025/2306-4412.3.2021.247252.

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У статті запропоновано застосування базової групи операцій перестановок, керованих інформацією, з урахуванням трьох видів алгоритмів реалізації криптографічного перетворення: просте перемішування, гамування з ключем, гамування з ключем із заданою кількістю раундів. Розроблено алгоритми використання операцій перестановок, керованих інформацією, з метою застосування їх як у програмних, так і в апаратних засобах криптографічного захисту інформації. Проведено оцінювання ефективності цих алгоритмів на основі їх програмної реалізації та статистичного тестування пакетом тестів NIST STS. Здійснено аналіз статистичних портретів одержаних результатів роботи розроблених алгоритмів з метою оцінки їх придатності в процесі побудови криптографічних алгоритмів. Показано, що для практичної реалізації криптографічного алгоритму на основі використання запропонованих операцій перестановок, керованих інформацією, потрібно визначити практичну криптографічну стійкість алгоритму, що напряму залежить від довжини пароля та кількості операцій, що застосовуються для шифрування інформації. Крім того, наведено розрахунок варіативності алгоритмів застосування для криптографічного перетворення декількох блоків інформації.
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5

Klyucharev, P. G. "On Statistical Testing of Block Ciphers." Mathematics and Mathematical Modeling, no. 5 (November 12, 2018): 35–56. http://dx.doi.org/10.24108/mathm.0518.0000132.

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Анотація:
Block ciphers form one of the main classes of cryptographic algorithms. One of the challenges in development of block ciphers, like any other cryptographic algorithms, is the analysis of their cryptographic security. In the course of such analysis, statistical testing of block ciphers is often used. The paper reviews literature on statistical testing of block ciphers.The first section of the paper briefly and informally discusses approaches to the definition of the concept of a random sequence, including the Kolmogorov, von Mises, and Martin-Löf approaches and the unpredictability-related approach. However, all these approaches to the definition of randomness are not directly applicable in practice.The second section describes statistical tests of binary sequences. It provides brief descriptions of the tests included in the DieHard, NIST STS, RaBiGeTe statistical test suites.The third section provides the appropriate information to present further the operation modes of block ciphers.The fourth section deals with techniques for statistical testing of block ciphers. Usually such techniques lie in the fact that based on the block cipher under test, various generators of the pseudorandom sequences are built, with their output sequences being tested using any suite of statistical tests. The approaches to the construction of such generators are given.The paper describes the most known statistical test technique for block ciphers among the submitted for the AES competition. It is a technique the NIST uses for statistical testing of ciphers. In addition, there are other techniques mentioned in the literature.In conclusion the paper states that there is a need to develop new techniques for statistical testing of block ciphers.The paper support was provided from the Russian Foundation for Basic Research in the framework of the research project No. 16-07-00542 supported
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6

Elshoush, Huwaida T., Banan M. Al-Tayeb, and Khalil T. Obeid. "Enhanced Serpent algorithm using Lorenz 96 Chaos-based block key generation and parallel computing for RGB image encryption." PeerJ Computer Science 7 (December 17, 2021): e812. http://dx.doi.org/10.7717/peerj-cs.812.

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This paper presents a new approach to enhance the security and performance of the Serpent algorithm. The main concepts of this approach is to generate a sub key for each block using Lorenz 96 chaos and then run the process of encryption and decryption in ECB parallel mode. The proposed method has been implemented in Java, openjdk version “11.0.11”; and for the analysis of the tested RGB images, Python 3.6 was used. Comprehensive experiments on widely used metrics demonstrate the effectiveness of the proposed method against differential attacks, brute force attacks and statistical attacks, while achieving superb results compared to related schemes. Moreover, the encryption quality, Shannon entropy, correlation coefficients, histogram analysis and differential analysis all accomplished affirmative results. Furthermore, the reduction in encryption/decryption time was over 61%. Moreover, the proposed method cipher was tested using the Statistical Test Suite (STS) recommended by the NIST and passed them all ensuring the randomness of the cipher output. Thus, the approach demonstrated the potential of the improved Serpent-ECB algorithm with Lorenz 96 chaos-based block key generation (BKG) and gave favorable results. Specifically, compared to existing encryption schemes, it proclaimed its effectiveness.
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7

Lara, Evangelina, Leocundo Aguilar, Jesús García, and Mauricio Sanchez. "A Lightweight Cipher Based on Salsa20 for Resource-Constrained IoT Devices." Sensors 18, no. 10 (October 4, 2018): 3326. http://dx.doi.org/10.3390/s18103326.

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Анотація:
The Internet of Things (IoT) paradigm envisions a world where everyday things interchange information between each other in a way that allows users to make smarter decisions in a given context. Even though IoT has many advantages, its characteristics make it very vulnerable to security attacks. Ciphers are a security primitive that can prevent some of the attacks; however, the constrained computing and energy resources of IoT devices impede them from implementing current ciphers. This article presents the stream cipher Generador de Bits Pseudo Aleatorios (GBPA) based on Salsa20 cipher, which is part of the eSTREAM project, but designed for resource-constrained IoT devices of Class 0. GBPA has lower program and data memory requirements compared with Salsa20 and lightweight ciphers. These properties allow low-cost resource-constrained IoT devices, 29.5% of the embedded systems in the market, to be able to implement a security service that they are currently incapable of, to preserve the user’s data privacy and protect the system from attacks that could damage it. For the evaluation of its output, three statistical test suites were used: NIST Statistical Test Suite (STS), DIEHARD and EACirc, with good results. The GBPA cipher provides security without having a negative impact on the computing resources of IoT devices.
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8

Gnatyuk, Sergiy, Yuliia Burmak, Rat Berdibayev, Marek Aleksander, and Dinara Ospanova. "METHOD FOR DEVELOPING PSEUDO-RANDOM NUMBER GENERATORS FOR CRYPTOGRAPHIC APPLICATIONS IN 5G NETWORKS." Cybersecurity: Education, Science, Technique 12, no. 4 (June 24, 2021): 151–62. http://dx.doi.org/10.28925/2663-4023.2021.12.151162.

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Анотація:
Today, pseudo-random number generators are used in various systems and applications, including as key generators in stream ciphers. The implementation of the latest information and communication technologies (in particular, 5G networks) strengthens the requirements for ensuring the confidentiality of critical data and forces the development of new methods and means for cryptographic protection. Existing generators, like other cryptographic algorithms, do not meet the requirements for processing speed and security against known types of attacks. From this position, in the paper a method for constructing pseudo-random sequence generators was developed. It allows to build efficient generators for cryptographic applications. Based on this method, software generators of pseudo-random numbers have been developed and implemented. These will be useful for cryptographic applications in modern 5G networks. The developed pseudo-random number generators have passed complex statistical testing by the NIST STS technique (showed results not worse than the results of known pseudo-random sequence generators used in practice to solve similar problems). Besides, they are faster in comparison with analogues used today in 5G networks (for example, with algorithms SNOW and Trivium). In further works it is planned to investigate the security of the developed pseudo-random generators against different types of cryptanalytic attacks, as well as to simulate the work of the developed pseudo-random sequence generators using the base station equipment of modern 5G networks.
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9

Du, Yanqiu, Wenru Shang, and Jiayan Huang. "OP354 Cost-Effectiveness Analysis Of Different Prenatal Screening Strategies For Down Syndrome In China: Data From Shandong Province." International Journal of Technology Assessment in Health Care 36, S1 (December 2020): 6–7. http://dx.doi.org/10.1017/s0266462320001038.

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IntroductionThere are large differences between the prenatal screening strategies for Down Syndrome (DS) in different provinces in China. In Henan province there is a serological triple screening in the second trimester (STS) strategy, while in Shandong province contingent non-invasive prenatal testing (NIPT) screening strategy (NIPT delivered to older pregnant women) is used, and there is a universal NIPT screening strategy in Anhui province. Moreover, many factors varied widely in different regions, such as the proportion of older pregnant woman and the ability of people to pay. This study aimed to determine the cost-effectiveness of current strategy in Shandong compared with strategies in other provinces.MethodsA decision tree model was developed according to the screening strategies in different provinces. Four screening strategies were involved, universal STS strategy, contingent STS strategy, contingent NIPT strategy, and universal NIPT strategy. Cost-effectiveness analysis was conducted from a societal perspective in a simulated cohort of 100,000 pregnant women. The data of costs and epidemiologic parameters were collected from field surveys in Shangdong and a literature review.ResultsThe universal STS strategy, contingent STS strategy, contingent NIPT strategy, and universal NIPT strategy could prevent 17.0, 40.0, 46.2, and 53.6 DS births, respectively. There was no strategy dominated by others. The universal NIPT strategy and contingent NIPT strategy would decrease invasive procedures for prenatal diagnosis, resulting in fewer procedure-related miscarriages. The sensitivity analysis showed that the effectiveness of the screening strategy is significantly influenced by the resident's acceptance of NIPT.ConclusionsFrom the perspective of maximizing the effect, the universal NIPT strategy is the optimal strategy. But taking into account the resident's and government's ability to pay, contingent NIPT Strategy may be appropriate for the current situation in Shandong. To ensure a better cost-effective advantage in the universal NIPT strategy, the government should provide health education to increase the acceptance of NIPT while controlling the price of NIPT.
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Shang, Wenru, Yang Wan, Jianan Chen, Yanqiu Du, and Jiayan Huang. "Introducing the non-invasive prenatal testing for detection of Down syndrome in China: a cost-effectiveness analysis." BMJ Open 11, no. 7 (July 2021): e046582. http://dx.doi.org/10.1136/bmjopen-2020-046582.

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ObjectiveThis study aimed to compare the health economic value of a non-invasive prenatal testing (NIPT) strategy against a second-trimester triple screening (STS) strategy for the detection of Down syndrome based on real-world data from China.DesignA decision-analytical model was developed to compare the cost-effectiveness of five strategies from a societal perspective. Cost and probability input data were obtained from the real-world surveys and published sources.SettingChina.ParticipantsWomen with a singleton pregnancy.InterventionsThe five strategies for screening were: (A) maternal age with STS (no NIPT); (B) STS plus NIPT screening; (C) age-STS plus NIPT screening (the currently referral strategy in China); (D) maternal age with NIPT screening and (E) universal NIPT screening.Main outcome measuresIncremental cost-effectiveness ratios (ICERs) per additional Down syndrome case terminated, univariate and probabilistic sensitivity analysis and cost-effectiveness acceptability curves were obtained.ResultsStrategy A detected the least number of Down syndrome cases. Compared with the cheapest Strategy B, Strategy D had the lowest ICER (incremental cost, US$98 944.85 per additional Down syndrome case detected). Strategy D had the highest probability of being cost-effective at the willingness-to-pay level between US$110 000.00 and US$535 000.00 per additional Down syndrome case averted. Strategy E would not be cost-effective unless the unit cost of the NIPT could be decreased to US$60.50.ConclusionIntroducing NIPT screening strategies was beneficial over the use of STS strategy alone. Evaluating maternal age in combination with the NIPT screening strategy performs better than China’s currently referral strategy in terms of cost-effectiveness and safety. Lowering the price of NIPT and optimising payment methods are effective measures to promote universal NIPT strategies in China.
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Дисертації з теми "NIST STS"

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Коптєва, М. В., та Т. О. Гріненко. "Методики тестування квантових генераторів випадкових чисел". Thesis, ВА ЗС АР; НТУ "ХПІ"; НАУ, ДП "ПДПРОНДІАВІАПРОМ"; УмЖ, 2021. https://openarchive.nure.ua/handle/document/15761.

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Метою доповіді є проведення порівняльного аналізу сучасних методик тестування квантових генераторів випадкових чисел з використанням пакетів статистичних тестів NIST STS, Diehard, а також серії тестів FIPS 140-3. В доповіді надані результати тестування випадкової послідовності, що була отримана з використанням КГВЧ, методиками NIST STS, Diehard, та FIPS 140-3.
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2

Allmacher, Clarissa. "Analyse der Expression von Matrix-Metalloproteinasen im Mammakarzinom mittels nicht-radioaktiver In-situ-Hybridisierung (NISH) /." München, 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000253664.

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3

Fabiano, Neylor de Lima. "A comunicação como ferramenta de gestão tecnológica da universidade pública : as agências de inovação." Universidade Federal de São Carlos, 2012. https://repositorio.ufscar.br/handle/ufscar/1083.

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Made available in DSpace on 2016-06-02T19:16:31Z (GMT). No. of bitstreams: 1 4222.pdf: 1592794 bytes, checksum: f898cd68680e7e901a98e4caba91627c (MD5) Previous issue date: 2012-02-23
The recent changes in Brazilian legislation to stimulate the innovation have influenced the functioning of public universities. The regulation of mechanisms of intellectual property management and technology transfer originated the innovation agencies, which are the scope of this work, trough STS studies (Science, Technology and Society). It assumes that their action has contributed to improve communication with the various university publics, helping to promote a cultural change towards innovation. The objective of this research is to identify, analyze and understand how the public university uses its structure and communication resources, through its agencies, to fulfill its institutional mission. It also aims to identify the perception of of its agents on the subject. The sample includes the innovation agencies of the Universidade Federal de Sao Carlos, Universidade Estadual de Campinas and Universidade de Sao Paulo. The qualitative case study used as methodology the Content Analysis, conducted from data collected in interviews with leaders and advisors. The investigation indicates a low level of international integration of communication activities, on which the legislation lacks regulatory elements; shows a consensus in the agents perception about the existence of a change in the academy stance on innovation, aligned with the role of university to promote social and economic development; appoints that the new legislation is one of the factors for that cultural change, together with the development of ICTs and the growing demand for the country.
As recentes mudanças na legislação brasileira para estímulo à inovação tiveram influência no funcionamento das universidades públicas. A regulamentação de mecanismos de gestão de propriedade intelectual e transferência de tecnologia deram origem às Agências de Inovação, que são o campo do presente trabalho, elaborado a partir dos estudos CTS (Ciência, Tecnologia e Sociedade). Partiu-se do pressuposto de que sua atuação tem contribuído para a melhoria da comunicação com os distintos públicos da universidade, ajudando a promover entre eles uma mudança cultural perante a inovação. O objetivo geral desta pesquisa é identificar, analisar e compreender como a universidade pública utiliza sua estrutura e seus recursos de comunicação, através das agências, para cumprir sua missão institucional. Visa também captar a percepção de seus agentes sobre o tema. Estão compreendidas na amostra as agências de inovação da Universidade Federal de São Carlos, Universidade Estadual de Campinas e Universidade de São Paulo. O estudo de caso qualitativo utilizou como metodologia a Análise de Conteúdo, realizada a partir de dados coletados em entrevistas com dirigentes e assessores. A investigação indica um baixo nível de inserção internacional das atividades de comunicação, sobre as quais a legislação regulamentadora carece de elementos; demonstra um consenso na percepção dos agentes sobre a existência de uma mudança na postura da academia diante do tema inovação, alinhada ao papel da universidade como promotora do desenvolvimento sócio-econômico; aponta a nova legislação como fator para essa mudança, aliada ao desenvolvimento das TICs e à demanda por crescimento do país.
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Книги з теми "NIST STS"

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Organization, National Information Standards. Extended Latin Alphabet Coded Character Set for Bibliographic Use (Ansel-Niso-Z39.47-1992). Transaction Pub, 1992.

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2

Chawla, Amit, Sayani Chawla, and Neha Bhushan. OPPORTUNITIES IN MEDIA INDUSTRY POST COVID-19 PANDEMIC. Clever Fox Publishing, 2022. http://dx.doi.org/10.52184/cfox.2022.1199.

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This book is designed to guide aspirants and beginners in the field of Mass Communication, especially those who are contemplating a professional career after the COVID-19 pandemic. The idea is to bring together media practitioners and eminent academicians from top media institutes so that they share their expertise and help newbies with available career choices in various sub-disciplines related to this field. The chapters in this book are written by top professors and scholars from SRFTI, AJK-MCRC Jamia Millia Islamia, IIMC, NIFT, Delhi University, Amity University, Sharda University, HP University, BIT – Durg, St. Xavier’s – Kolkata, University of Technology & Applied Sciences – OMAN, etc.; and from industry practitioners affiliated with NDTV, IGNCA – Ministry of Culture, Inshorts and many others.
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3

Chiracu, Alina. Pretul frumusetii. Tulburarile alimentare si implicatiile psihosociale ale acestora. Editura Universitara, 2021. http://dx.doi.org/10.5682/9786062813277.

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Frumusetea este in fiecare dintre noi... sub o forma sau alta. Frumusetea este o reflectare a ceea ce suntem in interior, in exterior, in minte si in trup, in toate adunate. Atunci cand ne raportam la standardele stricte de frumusete impuse de industria fashion sau media, frumusetea devine o tinta, adesea greu de atins, al carei pret poate deveni extrem de ridicat. Tulburarile alimentare se asociaza intr-o mare masura cu atingerea standardelor de frumusete, cu dorinta de a avea un corp subtire, cu visul de a avea un aspect perfect. Pare greu de suportat gandul ca nu suntem impecabili, suntem invatati sa ne raportam la un ideal pentru atingerea caruia facem eforturi adesea dureroase. Ne comparam cu ceilalti, ne pozitionam mai sus sau mai jos, uitand ca suntem mai mult decat corpul nostru, uitand ca este atat de simplu sa ne acceptam pur si simplu, sa fim de acord cu ceea ce este natural si autentic in noi. Meritam sa ne simtim frumosi, sa ne iubim pentru ceea ce suntem si sa mentinem un echilibru intre aspectul nostru si starea de sanatate fizica si psihica. Putem avea grija de corpul nostru si fara sacrificii, dar numai atunci cand intelegem ca adevarata frumusete nu este impusa de niste standarde, ci exista in sine, atunci cand ii permitem sa se exprime liber.
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Частини книг з теми "NIST STS"

1

Sakai, Hiroshi, Chenxi Liu, Xiaoxin Zhu, and Michinori Nakata. "On NIS-Apriori Based Data Mining in SQL." In Rough Sets, 514–24. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-47160-0_47.

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2

Sakai, Hiroshi, Michinori Nakata, and Dominik Ślęzak. "A NIS-Apriori Based Rule Generator in Prolog and Its Functionality for Table Data." In Rough Sets and Knowledge Technology, 226–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-24425-4_31.

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3

Hooda, D. S. "On Applications of Fuzzy Soft and Intuitionistic Fuzzy Soft Sets in Dimension Reduction and Medical Diagnosis." In New Ideas Concerning Science and Technology Vol. 8, 87–101. Book Publisher International (a part of SCIENCEDOMAIN International), 2021. http://dx.doi.org/10.9734/bpi/nicst/v8/2124e.

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"Nebraska Innovation Studio." In American Perspectives on Learning Communities and Opportunities in the Maker Movement, 158–82. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8310-3.ch007.

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The Nebraska Innovation Studio (NIS) is a university-based makerspace built on a membership model open to the faculty staff and students from the University of Nebraska – Lincoln (UNL) and community members at large. The space is located in the newly developed Innovation Campus that sits between the two established university campuses of UNL. Consisting of 17,000 ft2 (1580 m2), the space is large and modern with idea strips consisting of TV monitors, peg boards, and white boards running throughout much of the space. NIS has received a number of donations to enable the purchasing of equipment including laser cutters, 3D printers, a long arm quilter, as well as a number of work tables and computers. Overall, the space is very welcoming to new members, with few rules and policies to distract from the making experience. Learning communities are formed through the hard work of NIS staff, which keep track of individual members' projects and interests and work to ensure they connect with like-minded makers in the space. NIS has impacted the community by opening a shared university space, with the community focused on innovation and entrepreneurship. This chapter explores the Nebraska Innovation Studio.
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Succar, Bilal. "Building Information Modelling Maturity Matrix." In Handbook of Research on Building Information Modeling and Construction Informatics, 65–103. IGI Global, 2010. http://dx.doi.org/10.4018/978-1-60566-928-1.ch004.

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Building Information Modelling (BIM) is an expanding collection of concepts and tools which have been attributed with transformative capabilities within the Architecture, Engineering, Construction and Operations (AECO) industry. BIM discussions have grown to accommodate increasing software capabilities, infinitely varied deliverables, and competing standards emanating from an abundance of overlapping definitions attempting to delineate the BIM term. This chapter will steer away from providing its own definition of BIM yet concurs with those identifying it as a catalyst for change (Bernstein, 2005) poised to reduce industry’s fragmentation (CWIC, 2004), improve its efficiency (Hampson & Brandon, 2004) and lower its high costs of inadequate interoperability (NIST, 2004). In essence, BIM represents an array of possibilities and challenges which need to be understood and met respectively through a measurable and repeatable approach. This chapter briefly explores the multi-dimensional nature of the BIM domain and then introduces a knowledge tool to assist individuals, organisations and project teams to assess their BIM capability, maturity and improve their performance (Figure 1). The first section introduces BIM Fields and Stages which lay the foundations for measuring capability and maturity. Section 2 introduces BIM Competencies which can be used as active implementation steps or as performance assessment areas. Section 3 introduces an Organisational Hierarchy/Scale suitable for tailoring capability and maturity assessments according to markets, industries, disciplines and organisational sizes. Section 4 explores the concepts behind ‘capability maturity models’ and then adopts a five-level BIM-specific Maturity Index (BIMMI). Section 5 introduces the BIM Maturity Matrix (BIm³), a performance measurement and improvement tool which identifies the correlation between BIM Stages, Competency Sets, Maturity Levels and Organisational Scales. Finally, Section 6 introduces a Competency Granularity Filter which enables the tailoring of BIM tools, guides and reports according to four different levels of assessment granularity.
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Th y 1989) attempted to improve the usefulness of tele d ­ taitmtehemomsitdodf le thoefetah rl eec tw or ernetliae ti tohncsesnttruernyg , th beuntebdyag th a a in tcdooncnuemce ti notn patterns y work ha ing regions foorfstehaesognlaolbcelitm ha att , eipnreaddidcittiioonnb to y fille Adc in ru c w ia alspaap rt hyosfictahleepxipcltaunrdebteheantfro em rg aoitn ten atio ed . to be a m ls e o re lhyadshroew la itn io gnssh ta itp is stiw ca ilthEN EN SO SO -p rtehca ip t it w at eiroenhliignhklsy , t te hleecSoonuntehcetrinonOp sc aitltleartn io s. n A ju rsetvaisewaonfk fo nrow th leedogbesaeb rv oeudticdoennstiisftieendttfhreom se aespoin so sdaend to reegpiiosn od seo . f T th h e ey g p lo a b rt eicw ul haerr ly physical explanation precipitation was associated with ENSO in at least 75 e." In Droughts, 56. Routledge, 2016. http://dx.doi.org/10.4324/9781315830896-39.

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Тези доповідей конференцій з теми "NIST STS"

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Razaque, Abdul, Fathi Amsaad, Muder Almiani, Duisen Gulsezim, Mohammad Adnan Almahameed, Ayman Al-Dmour, Meer Jaro Khan, and Raouf Ganda. "Successes and Failures in Exploring Biometric Algorithms in NIST Open Source Software and Data." In 2020 Seventh International Conference on Software Defined Systems (SDS). IEEE, 2020. http://dx.doi.org/10.1109/sds49854.2020.9143889.

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Trokić, Danijela, Dražan Jaroš, Goran Marošević, Oliver Arsovski, and Dušan Drljača. "KOMPARACIJA TRODIMENZIONALNE KONFORMALNE RADIOTERAPIJE (3DCRT) I VOLUMETRIJSKI-MODULIRANE LUČNE TERAPIJE (VMAT-RA) U POSTOPERATIVNOM TRETMANU GLIOBLASTOMA." In Okrugli sto “Tumori centralnog nervnog sistema”. Academy of Sciences and Arts of Bosnia and Herzegovina, 2021. http://dx.doi.org/10.5644/pi2021.197.07.

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Cilj. Uporediti dozimetrijske parametre trodimenzionalne konformalne radioterapije (3DCRT) i volumetrijski modulirane lučne radioterapije (VMAT-RA) kod postoperativnog tretmana glioblastoma (GBM). Metode: Retrospektivno istraživanje uključilo je pacijente s dijagnozom GBM, liječene u periodu od septembra 2014. do januara 2017. u Centru za radioterapiju Banja Luka. Za svakog pacijenta pojedinačno urađena je simulacija kompjuteriziranom tomografijom (CT) i registracija postoperativne magnetne rezonance (MRI). Delineacija ciljnog volumena (PTV) i organa od rizika (OAR) urađena je prema registriranom MRI i ESTRO-ACROP preporukama. Tretman je proveden 3DCRT radioterapijom konkomitantno uz temozolomid. Naknadno je za svakog pacijenta urađen VMAT-RA plan s optimizacionim parametrima koji zadovoljavaju dozne limite OAR. Dodatne optimizacije nisu rađene, jer pacijenti nisu planirani da se zrače VMAT tehnikom. Kontrolnu grupu činili su 3DCRT planovi, a VMAT-RA eksperimentalnu grupu. Propisana je doza TD 54 – 60 Gy. Za obje tehnike zračenja su komparirani dozimetrijski parametri u dozno-volumnom histogramu (DVH). Shapiro-Wilk-ov test pokazao je asimetričnu distribuciju, značajnost razlika je utvrđena Wilcoxonovim testom predznaka rangova. Sve p vrijednosti manje od 0.05 smatrane su statistički značajnim. Rezultati: Pokrivenost dozom 98%, 95%, 50% i 2% volumena PTV tehnikom 3DCRT iznosila je 95.36±1.08, 96.88±0.88, 100.74±1.08 i 104.76±1.34, a za RA 96.53±0.86, 97.63±0.65, 100.05±0.15 i 102.47±0.55 redom, statistička značajnost p=0.007, 0.022, n.s i 0.005. Indeks homogenosti (HI) za 3DCRT je 0.09±0.02, za RA 0.06±0.01, p=0.005. Indeks konformalnosti (CI) za 3DCRT je 0.98±0.01, za RA 0,98±0,02, p=n.s. Doza na moždano stablo, ipsilateralni i kontralteralni optički nerv i hijazmu bila je nešto veća za RA, ali bez statističke značajnosti. Volumen mozga V50 bio je značajno manji kod RA. Zaključak: Primjena VMAT- RA tehnike bez dodatnih dozimetrijskih optimizacija u odnosu na 3DCRT rezultira boljom pokrivenosti PTV-a dozom i boljom homogenosti doze unutar PTV-a, ali bez značajne razlike u dozi koju primaju OAR.
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Marijanović, Inga, Teo Buhovac, and Gordana Berić Jović. "KEMOTERAPIJA U LIJEČENJU METASTATSKOG MELANOMA." In Okrugli sto s međunarodnim učešćem "Melanom". Akademija nauka i umjetnosti Bosne i Hercegovine, 2018. http://dx.doi.org/10.5644/pi2019.180.03.

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Melanom je zloćudni tumor pigmentiranih stanica kože – melanocita. Riječ je o tumoru kože s najvećom smrtnošću. Incidencija melanoma je u porastu. Današnji standard liječenja metastatskog melanoma u svijetu je primjena terapije u vidu monoklonskih protutijela – ipilimumab, nivolumab, pembrolizumab i tzv. ciljane terapije vemurafenibom i dabrafenibom s dodatkom MEK inhibitora (kobimetinib, trametinib) u slučaju BRAF mutacije. U mnogim dijelovima svijeta navedena terapija nije dostupna. U Bosni i Hercegovini se u novije vrijeme uvode u upotrebu gore navedene terapije, međutim kemoterapija se i dalje primjenjuje kod velikog broja pacijenata s metastatskim melanomom. Iako istraživanja nisu pokazala benefit u preživljenju u pacijenata s metastatskim melanomom liječenih kemoterapijom, postoji više citostatika koji su pokazali stopu odgovora između 10% i 20%. Moguća je i kombinacija kemoterapije s biološkom terapijom interferonom ili interleukinom 2. Cilj ovog članka je pokazati koje su terapijske opcije primjenjive u pacijenata u zemljama u kojim standardna terapija za metastatski melanom nije široko dostupna te kakav je učinak navedene terapije.
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Lee, S. Y., J. M. Jordan, and S. J. Hensel. "Thermal Modeling Analysis of SRS 70 Ton Cask." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-58031.

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The primary objective of this work was to perform the thermal calculations to evaluate the Material Test Reactor (MTR) fuel assembly temperatures inside the SRS 70-Ton Cask loaded with various bundle powers. MTR fuel consists of HFBR, MURR, MIT, and NIST. The MURR fuel was used to develop a bounding case since it is the fuel with the highest heat load. The results will be provided for technical input for the SRS 70 Ton Cask Onsite Safety Assessment. The calculation results show that for the SRS 70 ton dry cask with 2750 watts total heat source with a maximum bundle heat of 670 watts and 9 bundles of MURR bounding fuel, the highest fuel assembly temperatures are below about 263°C. Maximum top surface temperature of the plastic cover is about 112°C, much lower than its melting temperature 260°C. For 12 bundles of MURR bounding fuel with 2750 watts total heat and a maximum fuel bundle of 482 watts, the highest fuel assembly temperatures are bounded by the 9 bundle case. The component temperatures of the cask were calculated by a three-dimensional computational fluid dynamics approach. The modeling calculations were performed by considering daily-averaged solar heat flux.
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Lu, Yan, Paul Witherell, and Alkan Donmez. "A Collaborative Data Management System for Additive Manufacturing." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-68457.

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As additive manufacturing (AM) continues to mature as a production technology, the limiting factors that have hindered its adoption in the past still exist, for example, process repeatability and material availability issues. Overcoming many of these production hurdles requires a further understanding of geometry-process-structure-property relationships for additively manufactured parts. In smaller sample sizes, empirical approaches that seek to harness data have proven to be effective in identifying material process-structure-property relationships. This paper presents a collaborative AM data management system developed at the National Institute of Standards and Technology (NIST). This data management system is built with NoSQL (Not Only Structured Query Language) database technology and provides a Representational State Transfer (REST) interface for application integration. In addition, a web interface is provided for data curating, exploring, and downloading. An AM data schema is provided by NIST for an alpha release, as well as a set of data generated from an interlaboratory study of additively manufactured nickel alloy (IN625) parts. For data exploration, the data management system provides a mechanism for customized web graphic user interfaces configurable through a visualization ontology. As a collaboration platform, the data management system is set to evolve through sharing of both the AM schema and AM development data among the stakeholders in the AM community. As data sets continue to accumulate, it becomes possible to establish new correlations between processes, materials, and parts. The functionality of the data management system is demonstrated through the curation and querying of the curated AM datasets.
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Zhang, Wen, Yang Feng, and Qun Liu. "Bridging the Gap between Training and Inference for Neural Machine Translation (Extended Abstract)." In Twenty-Ninth International Joint Conference on Artificial Intelligence and Seventeenth Pacific Rim International Conference on Artificial Intelligence {IJCAI-PRICAI-20}. California: International Joint Conferences on Artificial Intelligence Organization, 2020. http://dx.doi.org/10.24963/ijcai.2020/667.

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Neural Machine Translation (NMT) generates target words sequentially in the way of predicting the next word conditioned on the context words. At training time, it predicts with the ground truth words as context while at inference it has to generate the entire sequence from scratch. This discrepancy of the fed context leads to error accumulation among the translation. Furthermore, word-level training requires strict matching between the generated sequence and the ground truth sequence which leads to overcorrection over different but reasonable translations. In this paper, we address these issues by sampling context words not only from the ground truth sequence but also from the predicted sequence during training. Experimental results on NIST Chinese->English and WMT2014 English->German translation tasks demonstrate that our method can achieve significant improvements on multiple data sets compared to strong baselines.
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Klinger, Alexander, and Brian A. Weiss. "Robotic Work Cell Test Bed to Support Measurement Science for Monitoring, Diagnostics, and Prognostics." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6617.

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Industrial robotics users, integrators, and manufacturers are implementing advanced monitoring, diagnostics, and prognostics (collectively known as Prognostics and Health Management (PHM)) techniques and technologies. PHM can take many different forms when implemented, and measures of effectiveness are highly dependent on the techniques implemented. A test bed has been built, and a use case designed, to represent common manufacturing tasks performed in robot work cells where PHM can provide greater equipment and process health intelligence. The physical and functional relationships within the work cell are mapped using a hierarchical deconstruction method to gain a better understanding of the propagation of effects of both equipment and process degradation. The test bed has been built so PHM techniques and technologies can be integrated and tested in a realistic scenario. Data is recorded for post processing and analysis for the verification and validation (V&V) of the implemented PHM techniques. The test bed will serve as a platform to develop, test, verify, and validate PHM techniques at the National Institute of Standards and Technology (NIST), and provide industry participants a standard platform for testing their PHM technologies. Having a common testing platform will provide industry a foundation for sets of tests to evaluate PHM. This paper presents the test bed and use case, the relationships therein, and the data management and collection approaches used to enable future research.
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Weiss, Brian A. "Developing Measurement Science to Verify and Validate the Identification of Robot Workcell Degradation." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2902.

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Анотація:
Abstract Robot systems have become more prevalent in manufacturing operations as the technology has become more accessible to a wider range of manufacturers, especially small to medium-sized organizations. Although these robot technologies have become more affordable, easier to integrate, and greater in functional capability, these advanced systems increase workcell complexity leading to the presence of more fault and failure modes. Given increasing manufacturing competitiveness, maximizing asset availability and maintaining desired quality and productivity targets have become essential. The National Institute of Standards and Technology (NIST) is developing measurement science (e.g., test methods, performance metrics, reference data sets) to monitor the degradation within a manufacturing workcell that includes a six-degree-of-freedom robot arm. Numerous components of the workcell influence the accuracy of the robot’s tool center position. Identifying the component(s) responsible for process degradation prior to the process performing out of specification will provide manufacturers with advanced intelligence to maintain or maximize their performance targets and asset availability. NIST’s research in robot workcell health promotes workcell component health characterization and develops methods and tools to verify and validate this approach. This paper presents the overall research plan and the efforts to date in developing appropriate test methods, identifying key sources of workcell degradation, and presenting baseline performance data that is leveraged for health assessment.
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Balcilar, Muhammet, Ahmet Selim Dalkiliç, Şevket Özgür Atayılmaz, Hakan Demir, and Somchai Wongwises. "Prediction of Pressure Drop of Various Refrigerants During Condensation in Horizontal Smooth and Micro-Fin Tubes by Means of Artificial Neural Networks." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-85039.

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The predictions of condensation pressure drops of R12, R22, R32, R125, R410A, R134a, R22, R502 and R507a flowing inside various horizontal smooth and micro-fin tubes are made using the numerical techniques of Artificial Neural Networks (ANNs) and non-linear least squares (NLS). The National Institute of Standards and Technology’s (NIST) experimental data and, Eckels’ and Pate’s experimental data, as presented in Choi et al.’s study provided by NIST, are used in our analyses. In their experimental setups, the horizontal test sections have 1.587 m, 3.78 m, 3.81 m and 3.97 m long countercurrent flow double tube heat exchangers with refrigerant flowing in the inner smooth (8 mm, 8.01 mm and 11.1 mm i.d.) and micro-fin (5.45 mm and 7.43 mm i.d.) copper tubes as cooling water flows in the annulus. Their test runs cover a wide range of saturation pressures from 0.9 MPa to 2.9 MPa, inlet vapor qualities range from 0.19 to 1.0 and mass fluxes are from 8 kg m−2s−1 to 791 kg m−2s−1. The condensation pressure drops are predicted using 673 measured data points, together with numerical analyses of artificial neural networks and non-linear least squares. The input of the ANNs for the best correlation are the measured and the values of the test sections are calculated, such as mass flux, tube length, inlet and outlet vapor qualities, critical pressure, latent heat of condensation, mass fraction of liquid and vapor phases, dynamic viscosities of liquid and vapor phases, hydraulic diameter, two-phase density, and the outputs of the ANNs as the experimental total pressure drops in the condensation data from independent laboratories. The total pressure drops of in-tube condensation tests are modeled using the artificial neural networks (ANNs) method of multi-layer perceptron (MLP) with a 12-40-1 architecture. The average error rate is 7.085%, considering the cross validation tests of the 867 condensation data points. A detailed model of f(MLP) is given for direct use in MATLAB. This explanation will enable users to predict the two-phase pressure drop with high accuracy. As a result of the dependency analyses, dependency of the output of the ANNs from 12 sets of input values is shown in detail, and the pressure drops of condensation in smooth and micro-fin tubes are found to be highly dependent on mass flux, all liquid Reynolds numbers, the latent heat of condensation, outlet vapor quality, critical pressure of the refrigerant, liquid dynamic viscosity, and tube length. New ANNs based empirical pressure drop correlations are developed separately for the conditions of condensation in smooth and micro-fin tubes as a result of the analyses.
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Farah, Amjad, Glenn Harvel, and Igor Pioro. "Assessment of FLUENT Code as a Tool for SCW Heat Transfer Analysis." In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-16446.

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Generation-IV SuperCritical Water-cooled Reactors (SCWRs) are expected to have high thermal efficiencies within the range of 45–50% owing to the reactor’s high pressures and outlet temperatures. The behavior of supercritical water however, is not well understood and most of the methods available to predict the effects of the heat transfer phenomena within the pseudocritical region are based on empirical one-directional correlations which do not capture the multi-dimensional effects and do not provide accurate results in regions such as the deteriorated heat transfer regime. Computational Fluid Dynamics (CFD) is a numerical approach to model fluids in multidimensional space using the Navier-Stokes equations and databases of fluid properties to arrive at a full simulation of a fluid dynamics and heat transfer system. In this work, the CFD code, FLUENT-12, is used with associated software such as Gambit and NIST REFPROP to predict the Heat Transfer Coefficients at the wall and corresponding wall temperature profiles inside vertical bare tubes with SuperCritical Water (SCW) as the cooling medium. The numerical results are compared with experimental data and 1-D models represented by existing empirical correlations. Analysis of the individual heat-transfer regimes is conducted using an axisymmetric 2-D model of tubes of various lengths and composed of different nodalizations along the heated length. Wall temperatures and heat transfer coefficients were analyzed to select the best model for each region (below, at and above the pseudocritical region). Two turbulent models were used in the process: k-ε and k-ω, with variations in the sub-model parameters such as viscous heating, thermal effects, and low-Reynolds number correction. Results of the analysis show a fit of ±10% for the wall temperatures using the SST k-ω model in the deteriorated heat transfer regime and less than ±5% for the normal heat transfer regime. The accuracy of the model is higher than any empirical correlation tested in the mentioned regimes, and provides additional information about the multidimensional effects between the bulk-fluid and wall temperatures.
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Звіти організацій з теми "NIST STS"

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Shtuni, Adrian. Nužnost Reintegracije: Djeca Povratnici u Zapadnom Balkanu. RESOLVE Network, February 2021. http://dx.doi.org/10.37805/pn2021.3.wb.

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Анотація:
Od 2012. godine 1070 državljana zemalja zapadnog Balkana o šlo je živje i bori se na teritorijima pod kontrolom teroris čkih organizacija u Siriji i Iraku. Od h državljana, otprilike 200 njih bili su maloljetnici u trenutku odlaska. Tijekom godina na području sukoba u Siriji i Iraku državljanima zapadnog Balkana rodilo se još mnogo više djece. Do kraja 2019. godine oko 485 osoba vra lo se domovima, zbog čega regija zapadnog Balkana ima najveću koncentraciju povratnika iz Sirije i Iraka u Europi. Još su sto ne ljudi, uglavnom maloljetnika, ostale zarobljene u nesigurnim uvje ma u Siriji s neizvjesnim izgledima za povratak. Mnoge zemlje nisu sigurne što učini s državljanima koji su otputovali da bi živjeli i borili se u „kalifatu” Islamske države. Među m, iskustvo i razumijevanje u pogledu onoga što olakšava učinkovitu uključenost povratnika iz Sirije, osobito djece povratnika, još je uvijek u početcima. Ovom se studijom o poli ci pružaju preporuke o načinima pristupa rehabilitaciji i reintegraciji djece povratnika na zapadnom Balkanu kombiniranjem novih dobrih praksi s vodećim načelima konvencija, ugovora i protokola usredotočenih na prava djece.
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ANSI/NISO Z39.102-2017, STS: Standards Tag Suite (Version 1.0). National Information Standards Organization (NISO), October 2017. http://dx.doi.org/10.3789/ansi.niso.z39.102-2017.

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