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Добірка наукової літератури з теми "Oblivious sampling"

Автор: Grafiati
Опубліковано: 21 вересня 2024

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Статті в журналах з теми "Oblivious sampling"

1

Zuckerman, David. "Randomness-optimal oblivious sampling." Random Structures and Algorithms 11, no. 4 (December 1997): 345–67. http://dx.doi.org/10.1002/(sici)1098-2418(199712)11:4<345::aid-rsa4>3.0.co;2-z.

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2

Bunn, Paul, and Rafail Ostrovsky. "Oblivious Sampling with Applications to Two-Party k-Means Clustering." Journal of Cryptology 33, no. 3 (May 12, 2020): 1362–403. http://dx.doi.org/10.1007/s00145-020-09349-w.

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3

Agarwal, Mridul, Vaneet Aggarwal, Arnob Ghosh, and Nilay Tiwari. "Reinforcement Learning for Mean-Field Game." Algorithms 15, no. 3 (February 22, 2022): 73. http://dx.doi.org/10.3390/a15030073.

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Stochastic games provide a framework for interactions among multiple agents and enable a myriad of applications. In these games, agents decide on actions simultaneously. After taking an action, the state of every agent updates to the next state, and each agent receives a reward. However, finding an equilibrium (if exists) in this game is often difficult when the number of agents becomes large. This paper focuses on finding a mean-field equilibrium (MFE) in an action-coupled stochastic game setting in an episodic framework. It is assumed that an agent can approximate the impact of the other agents’ by the empirical distribution of the mean of the actions. All agents know the action distribution and employ lower-myopic best response dynamics to choose the optimal oblivious strategy. This paper proposes a posterior sampling-based approach for reinforcement learning in the mean-field game, where each agent samples a transition probability from the previous transitions. We show that the policy and action distributions converge to the optimal oblivious strategy and the limiting distribution, respectively, which constitute an MFE.
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4

Nwaobilor, Stephen Ogbonna, and Sola Aluko-Arowolo. "Concurrent Use of Traditional and Orthodox Modes of Healthcare Services among Out-Patient Nursing Mothers in Ikenne Local Government Area, Ogun State, Nigeria." International Journal of Current Research in the Humanities 26, no. 1 (February 25, 2023): 337–48. http://dx.doi.org/10.4314/ijcrh.v26i1.20.

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Every society makes provisions for the health care delivery system for its members, this is intending to provide medical and related services for the maintenance of good health, particularly through the prevention and treatment of diseases. This is in recognition of the pervasive importance of good health upon which life is contingent. Despite the development of more researched and formulated orthodox medicines, herbal medicines continue to be well patronized by persons across the world with some patrons concurrently using both forms, oblivious of the unwelcome effects that may occur. The study adopted a descriptive survey research design. For the study, a quantitative approach was used in analyzing the data collected, the population of the study were females between the ages 15-49 with a total of 1081 nursing mothers in Ikenne Local Government Area (LGA), Ogun Nigeria. Sample size determination calculation by Cochran was used to determine the sample size of 190. A multi-stage random sampling, purposive sampling and accidental sampling technique were used to select the respondents. The study revealed that all the social and demographic characteristics of respondents except community had a significant association with respondents’ concurrent usage of herbal and orthodox medicines. It was also observed that 2 in every 10 nursing mothers uses both orthodox and herbal drugs concurrently on their children. The study concluded that 11.05% of respondents concurrently used herbal and orthodox medicines for infant health problems.
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5

Faehrmann, Paul K., Mark Steudtner, Richard Kueng, Mária Kieferová, and Jens Eisert. "Randomizing multi-product formulas for Hamiltonian simulation." Quantum 6 (September 19, 2022): 806. http://dx.doi.org/10.22331/q-2022-09-19-806.

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Quantum simulation, the simulation of quantum processes on quantum computers, suggests a path forward for the efficient simulation of problems in condensed-matter physics, quantum chemistry, and materials science. While the majority of quantum simulation algorithms are deterministic, a recent surge of ideas has shown that randomization can greatly benefit algorithmic performance. In this work, we introduce a scheme for quantum simulation that unites the advantages of randomized compiling on the one hand and higher-order multiproduct formulas, as they are used for example in linear-combination-of-unitaries (LCU) algorithms or quantum error mitigation, on the other hand. In doing so, we propose a framework of randomized sampling that is expected to be useful for programmable quantum simulators and present two new multi-product formula algorithms tailored to it. Our framework reduces the circuit depth by circumventing the need for oblivious amplitude amplification required by the implementation of multi-product formulas using standard LCU methods, rendering it especially useful for early quantum computers used to estimate the dynamics of quantum systems instead of performing full-fledged quantum phase estimation. Our algorithms achieve a simulation error that shrinks exponentially with the circuit depth. To corroborate their functioning, we prove rigorous performance bounds as well as the concentration of the randomized sampling procedure. We demonstrate the functioning of the approach for several physically meaningful examples of Hamiltonians, including fermionic systems and the Sachdev–Ye–Kitaev model, for which the method provides a favorable scaling in the effort.
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Ameade, Evans Paul Kwame, Mohammed Ibrahim, Halimatu-Sadia Ibrahim, Rabiatu Hamisu Habib, and Stephen Yao Gbedema. "Concurrent Use of Herbal and Orthodox Medicines among Residents of Tamale, Northern Ghana, Who Patronize Hospitals and Herbal Clinics." Evidence-Based Complementary and Alternative Medicine 2018 (2018): 1–8. http://dx.doi.org/10.1155/2018/1289125.

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Анотація:
Despite the development of more researched and formulated orthodox medicines, herbal medicines continue to be well patronized for persons across the world with some patrons concurrently using both forms, oblivious of the unwanted effects that may occur. Using a multistage sampling procedure, a semistructured questionnaire was used to collect data in April 2016 from 240 informants from three selected hospitals and three herbal clinics in Tamale, a city in northern Ghana. Using Statistical Package for the Social Sciences, binary logistic regression was used to determine sociodemographic predictors of concurrent use of herbal and orthodox medicines. Orthodox medicines were the drug of choice for 54.2% and 49.2% of patrons of hospitals and herbal clinics, respectively. Also, 67.5% of herbal clinic patrons used orthodox medicines, while 25.0% of hospital attendees used herbal medications prior to their visit to the health facilities. Up to 17.9% of respondents concurrently used herbal and orthodox medicines for their prevailing ailment with age, less than 30 years being the only predictor of this habit (p=0.015; 95% CI, 1.183–4.793; cOR = 2.4). All health professionals including those in herbal clinics should therefore be interested in the drug history of their clients.
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7

Ajayi, Ayodeji Olusola, and Tola Adeleke. "SOUNDSCAPE MAPPING OF AGODI PARK AND GARDENS, IBADAN SOUTHWESTERN NIGERIA." Journal of Event, Tourism and Hospitality Studies 2 (December 23, 2022): 150–76. http://dx.doi.org/10.32890/jeth2022.2.6.

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This study provides contextual evidence on recreational noise exposure in a typical Nigerian urban park. It investigated perceived sonic characteristics as well as the spatial noise variations across Agodi Park and Gardens in the city of Ibadan, Oyo State, Nigeria. Integration of noise mapping and soundscape methods was used to understand the nature of noise being generated in this outdoor setting. Sound Pressure Level (SPL) was used to obtain data from nine major locations within the park. Using a non-probabilistic method of sampling, fifty respondents were selected incidentally to participate in this study. With the aid of an instrument consisting structured questionnaires and observation checklist, information on respondents’ demographic characteristics, their perceptions of the recreational noise, and desirability levels of soundscape in the park was obtained. Recreational noise data was analyzed using descriptive statistics and the Test of Difference (T-test) to investigate time-based variations in the level of noise (morning and evening periods). Although most respondents were oblivious of the noise exposure, findings show that the average sound level in the park was 77 dBA which exceeded the recommended noise limit of 60 dBA expected in recreational parks. The study recommends that soundscape characters should be considered in the design of future urban parks as they would go a long way in improving and enhancing the quality of perceived user’s comfort.
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Owusu, Edmund, Charles Kwoseh, Enoch Osekre, Emmanuel Duku, Barnabas Adongo, and Eric Gyasi. "Fusarium Wilt Disease of Eggplant: Farmers’ Socio-Demographic Characteristics, Farming History, Awareness and Perception in Major Eggplant Growing Areas of Ghana." University of Zambia Journal of Agricultural and Biomedical Sciences 7, no. 1 (March 30, 2023): 46–67. http://dx.doi.org/10.53974/unza.jabs.7.1.1102.

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Анотація:
Fusarium wilt disease cause losses to eggplants in many parts of Ghana. However, information about farmers’ appreciation and management of the disease is limited. In this study, farmers’ socio-demographic characteristics, farming history, awareness and perception of Fusarium Wilt disease of eggplants in some major eggplant growing areas in the Ashanti, Eastern and Volta Regions of Ghana were determined. Purposive sampling method was used to select major eggplant producing communities and snowball technique was employed to identify eggplant farmers. A structured questionnaire aided with pictures of Fusarium infected eggplant was used to inquire for information from750 farmers in the three regions; 250 from each region and 50 from each of the 5 communities selected in each region. The farmers on the three regions had similar socio-demographic characters and knowledge of Fusarium wilt disease of eggplants. Farmers were mostly within the age group of 30 year to 50 years and 63% of them had formal education. Land preparation was mainly manual, except for some part of the Volta region that used tractors. Mixed cropping with other vegetables and crop rotation with cereals was most practiced. Farmer selected seeds were the major planting materials. Wilt symptoms was a common observation of farmers in all the regions. However, majority were oblivious of the cause and source of the disease and therefore were unable to apply appropriate management methods. Farmers could not estimate losses caused by Fusarium wilt disease and therefore were not keen on management methods.
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9

Hashim, Hazlaili Binti, Andy Lim Yee Chee, Yeo Sook Fern, Anushia Chelvarayan, and Khairol Nizat Bin Lajis. "Financial Literacy: The Influencing Factors Among Youth." International Journal of Creative Business and Management 1, no. 2 (August 31, 2021): 1. http://dx.doi.org/10.31098/ijcbm.v1i2.5415.

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Анотація:
Malaysia, like all other countries throughout the world, became a victim of the COVID 19 epidemic. Based on the Malaysia's Insolvency Department 2021 statistical data, the alarming increase of individual bankruptcy cases were caused by failure to pay personal loans, instalment purchases, and credit card debt especially amongst youth. This is concerning because it implies that young Malaysians are still oblivious to their financial circumstances. Hence, the goal of this research is to investigate the level of financial literacy among youth, as well as the relationship between financial knowledge, financial behaviour, financial attitude, and familial influences on financial literacy. A non-probability convenience sampling method was used to gather information from 181 respondents. The findings of the study show that financial knowledge (p=0.000), financial behaviour (p=0.000), and family influence (p=0.000), are significantly associated to financial literacy, the dependent variable in this study, with the exception of financial attitude (p=0.418). Time constraints, insufficient independent variables covered, questionnaire development, respondents' honesty, and respondents' inequity were some of the challenges encountered while conducting this study. The most significant limitation is the sample size, which does not represent the population of Malaysian youth. The findings of this study have broad implications for a wide range of stakeholders, including university students, curriculum developer, parents of students, and future researchers. In this study, the factors that influence financial literacy among youth were examined, and it was concluded that the youth literacy level was moderate. The findings of the study will also help to support the National Strategy for Financial Literacy, which runs from 2019 to 2023.
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10

Oyeleye. "Use of Herbal Medicine by Rural Residents in Lagos, Nigeria." West Africa Journal of Medicine 39, no. 5 (June 26, 2022): 508–15. http://dx.doi.org/10.55891/wajm.v39i5.124.

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Background: Medicinal plants have been used for years in daily life all over the world. Herbal medicines (HM) may be beneficial but are not completely harmless especially with unregulated use. Aim: To assess the knowledge, preference and use of HM in a rural setting, western Nigeria. Methodology: This was a cross-sectional study among 417 residents of Epe Local Government Area, Lagos State Nigeria conducted in mid 2016. Respondents were selected using a multi-stage sampling technique. Data were collected using a structured pretested interviewer-administered questionnaire and analyzed using Epi- info version 7.1.5.2. Descriptive and inferential statistics were done. P-value of <0.05 was considered statistically significant. RESULTS: Nearly half (48.7%) of the respondents were between the ages of 18-33 years, over three fourths (78.4%) were married and majority (89.2%) were Yoruba. About half 207(49.6%) of respondents had good knowledge of HM. Over two thirds (67.6%) would use HM as first line treatment and 69.3% perceive it more effective than conventional medicine. Almost all (95.7%) respondents have used HM, majority (87.4%) in the last six months prior to study. Factors significantly associated with knowledge of HM are age (p=0.001) and sex of respondents (p=0.014). Significant factors influencing HM use include level of education (Fisher's exact p=0.017), religion (Fisher's exact p=0.001), and ethnicity (Fisher's exact p<0.001). Conclusion: Participants were fairly knowledgeable about herbal medicine but most were oblivious of its potential side effects. Majority were HM users mainly because of its perceived effectiveness. There is need for health education in rural areas on the side effects and safe use of herbal medicines. Author T M Oyeleye 1, I P Okafor 1
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Дисертації з теми "Oblivious sampling"

1

Fallahpour, Pouria. "Lattice-based cryptography in a quantum setting : security proofs and attacks." Electronic Thesis or Diss., Lyon, École normale supérieure, 2024. http://www.theses.fr/2024ENSL0023.

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L'émergence des machines quantiques crée des défis et des opportunités pour la cryptographie. En particulier, les preuves de sécurité doivent être révisées en raison des capacités quantiques des adversaires. Cette thèse propose deux contributions à cet égard : un résultat positif et un résultat négatif. La transformation de Fiat-Shamir avec des rejets est l’un des principaux paradigmes pour concevoir des schémas de signature post-quantiques. Une partie de cette thèse consiste en une analyse détaillée de cette transformation dans le modèle de l’oracle aléatoire quantique. Tous les travaux précédents proposant une analyse de sécurité de cette transformation ont négligé des détails subtils, compromettant la correction des preuves. Par conséquent, notre preuve de sécurité est la première de son genre à être correcte. De plus, nous analysons le temps d'exécution et la correction des signatures obtenues à partir de cette transformation. Le problème learning with errors (LWE) a été largement utilisé pour construire des schémas cryptographiques sécurisés contre les adversaires quantiques. Une hypothèse liée à LWE stipule que la génération d'une instance LWE sans connaître son secret est difficile pour tous les algorithmes polynomiaux. On peut utiliser cette hypothèse pour prouver la sécurité de certains arguments de connaissance succints. Bien que cela semble être une tâche difficile pour les algorithmes classiques, nous présentons un algorithme quantique polynomial qui génère des instances LWE sans connaître le secret. Notre algorithme invalide ainsi les analyses de sécurité de ces arguments de connaissance succints dans le contexte quantique
The rise of quantum machines poses both challenges and opportunities for cryptography. In particular, security proofs may require revisions due to adversaries' quantum capabilities. This thesis presents two contributions in this respect: a positive result and a negative one. The Fiat-Shamir transform with aborts is one of the major paradigms for designing post-quantum secure signature schemes. Part of this thesis consists of a detailed security analysis of this transform in the quantum random oracle model. It is worth noting that all previous works have neglected subtle details, jeopardizing the correctness of their proofs. Consequently, our security proof stands as the first of its kind that is correct. Moreover, we analyze the runtime and correctness of the signatures obtained from this transform. The learning with errors (LWE) problem has been extensively utilized to construct cryptographic schemes that are secure against quantum adversaries. A knowledge assumption of the LWE problem states that obliviously sampling an LWE instance, namely without knowing its underlying secret, is hard for all polynomial-time algorithms. One can use this assumption to prove the security of some succinct non-interactive arguments of knowledge (SNARKs). While it seems a hard task for classical algorithms, we demonstrate a quantum polynomial-time oblivious LWE sampler. Consequently, our sampler breaks the security analysis of the mentioned SNARKs in the quantum setting
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Частини книг з теми "Oblivious sampling"

1

Lipmaa, Helger, Roberto Parisella, and Janno Siim. "Algebraic Group Model with Oblivious Sampling." In Theory of Cryptography, 363–92. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-48624-1_14.

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2

Wee, Hoeteck, and Daniel Wichs. "Candidate Obfuscation via Oblivious LWE Sampling." In Lecture Notes in Computer Science, 127–56. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77883-5_5.

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Тези доповідей конференцій з теми "Oblivious sampling"

1

Fattal, David, Marco Fiorentino, and Raymond G. Beausoleil. "A practical scheme for quantum oblivious transfer and private database sampling." In Optical Engineering + Applications, edited by Ronald E. Meyers, Yanhua Shih, and Keith S. Deacon. SPIE, 2008. http://dx.doi.org/10.1117/12.793715.

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Debris-Alazard, Thomas, Pouria Fallahpour, and Damien Stehlé. "Quantum Oblivious LWE Sampling and Insecurity of Standard Model Lattice-Based SNARKs." In STOC '24: 56th Annual ACM Symposium on Theory of Computing. New York, NY, USA: ACM, 2024. http://dx.doi.org/10.1145/3618260.3649766.

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3

Li, Enhan, Wenhao Wu, Wang Zhaohua, Zhenyu Li, and Jianwei Niu. "SAROS: A Self-Adaptive Routing Oblivious Sampling Method for Network-wide Heavy Hitter Detection." In APNet 2024: The 8th Asia-Pacific Workshop on Networking. New York, NY, USA: ACM, 2024. http://dx.doi.org/10.1145/3663408.3663429.

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