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Academic literature on the topic 'OPAC systems'

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Published: 10 March 2023

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Journal articles on the topic "OPAC systems"

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Wells, David. "Online Public Access Catalogues and Library Discovery Systems." KNOWLEDGE ORGANIZATION 48, no. 6 (2021): 457–66. http://dx.doi.org/10.5771/0943-7444-2021-6-457.

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This article provides an overview of computer based catalogue systems designed for use by library clients, seeing present day ‘discovery systems’ on the same trajectory as the older ‘online public access catalogues’ (OPACs) which they are gradually replacing, both in technical development and their approach to client use scenarios. It traces the history of the OPAC/discovery system from its origins in the library automation of the 1960s through to the present and discusses the main technical standards which have formed its development. The article goes on to consider questions relating to the usability of electronic library catalogues and highlights semiotic and ethical issues inherent to their design. It concludes with reflections on the future of the OPAC/discovery system in an information universe apparently dominated by the internet search engine.
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Mi, Jia, and Cathy Weng. "Revitalizing the Library OPAC: Interface, Searching, and Display Challenges." Information Technology and Libraries 27, no. 1 (March 1, 2008): 5. http://dx.doi.org/10.6017/ital.v27i1.3259.

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The behavior of academic library users has drastically changed in recent years. Internet search engines have become the preferred tool over the library online public access catalog (OPAC) for finding information. Libraries are losing ground to online search engines. In this paper, two aspects of OPAC use are studied: (1) the current OPAC interface and searching capabilities, and (2) the OPAC bibliographic display. The purpose of the study is to find answers to the following questions: Why is the current OPAC ineffective? What can libraries and librarians do to deliver an OPAC that is as good as search engines to better serve our users? Revitalizing the library OPAC is one of the pressing issues that has to be accomplished.
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Chung, Ada Chi Wai, and Dickson K. W. Chiu. "OPAC Usability Problems of Archives." International Journal of Systems and Service-Oriented Engineering 6, no. 1 (January 2016): 54–70. http://dx.doi.org/10.4018/ijssoe.2016010104.

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This study aims to explore common pitfalls of design and functional issues of Open Public Access Catalogue (OPAC) systems for archives for the general public and suggest solutions to approach such problems. Other than general users, this study also suggests ways to enhance the OPAC system to make it more user-friendly to users with special needs, such as the elderly and children. This paper uses a case study approach to evaluate the usability of the OPAC system in the Hong Kong Film Archive (HKFA), which is a representative and important archive of its type. The paper provides practical insights on common pitfalls of design and functional issues of OPAC for archives under such context (such as searching user-friendliness) and suggests technical solutions (such as Web 2.0 and more user friendly input devices) to approach such problems. Although we carried out this usability study mainly based on observation without direct interaction with their target users, we already discover adequate and significant problems for the discussions and suggestions in this paper. The paper includes implications and suggestion for archives to improve the usability and functionality of their OPAC systems, which is a key to their public services. Recently, implementing public Web-based access to archives has become popular. However, there are just few usability studies on such OPAC systems, especially for archives facing the general public instead of just professionals.
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Kapoor, Kanta, and O. P. Goyal. "Web‐based OPACs in Indian academic libraries: a functional comparison." Program 41, no. 3 (July 31, 2007): 291–309. http://dx.doi.org/10.1108/00330330710774165.

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PurposeThe paper seeks to provide a comparative analysis of the functionality of five web‐based OPACs available in Indian academic libraries.Design/methodology/approachSame‐topic searches were carried out by three researchers on the web‐based OPACs of Libsys, VTLS's iPortal, NewGenLib, Troodon, and Alice for Windows, implemented in five academic libraries in India. Their functionality was compared using criteria selected from the literature on OPAC searching.FindingsThe web‐based OPACs investigated offered a range of facilities for searching by author, title, control number and by keywords. Federated searching across several e‐collections was limited.Originality/valueThis paper should be a useful source of information to librarians who are planning to introduce web‐based OPACs and also for software vendors who wish to improve the functionality of their products.
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Andrews, Christina M., S. Manzur Elahi, and James E. Clark. "Evaluation of New Jersey Route 18 OPAC/MIST Traffic-Control System." Transportation Research Record: Journal of the Transportation Research Board 1603, no. 1 (January 1997): 150–55. http://dx.doi.org/10.3141/1603-19.

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Conventional traffic-control strategies have limitations in handling unanticipated traffic demands. An adaptive traffic-signal control is expected to mitigate this problem and improve overall system performance. Furthermore, with the increasing needs of evolving intelligent transportation systems, traffic signals are expected to provide significantly greater functionalities, which can be achieved only by adaptive control. A product of many years of development, Optimized Policies for Adaptive Control (OPAC) represents a significant step forward in adaptive signal-control research. The OPAC strategy was field-tested at a New Jersey site. The performance of OPAC was compared against a well-designed time-of-day signal control. The evaluation was performed under various traffic-demand conditions and included both isolated intersections and arterial sections. The analysis indicated a highly significant improvement with OPAC control. OPAC showed its best performance during oversaturated conditions. It reduced the travel time and number of stops by about 26 percent and 55 percent, respectively, for the entire arterial section. OPAC also improved traffic performance during changing demand conditions. It significantly improved the performance of an isolated intersection during undersaturated traffic conditions. OPAC reduced stopped delay on the major-street approach by 40 percent without affecting the minor-street performance.
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Lewis, Peter. "Cost Savings and Service Strategies in the British National Bibliographic Service." Alexandria: The Journal of National and International Library and Information Issues 1, no. 2 (August 1989): 17–26. http://dx.doi.org/10.1177/095574908900100203.

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The British Library launched in 1986 a Catalogue Action Plan to deal with the long-term prospect of declining financial and manpower resources, the absence of growth in the market for its services, an unacceptably large backlog of uncatalogued materials, and a steadily increasing annual output of British publications to be catalogued. The initial phase of the Plan was designed to contain staff costs by reduction and simplification in data content in BNBMARC and other British Library records, predicating their future use primarily in an online (OPAC) environment. It has had significant success for the British Library's aims in the first full year of implementation, but it has raised questions of the cost-benefit in centralized cataloguing services for the library community, in respect both of the costs and sizing of OPAC systems in local libraries and of the necessity of sustaining indefinitely the high cost of adherence to international standards established before OPACs, the CD-ROMs and OSI had changed the technology.
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Osborne, Hollie M., and Andrew Cox. "An investigation into the perceptions of academic librarians and students towards next-generation OPACs and their features." Program 49, no. 1 (February 2, 2015): 23–45. http://dx.doi.org/10.1108/prog-10-2013-0055.

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Purpose – The purpose of this paper is to determine whether features of next-generation Online Public Access Catalogue (OPAC) interfaces are useful and intuitive to users who have different levels of searching ability. In addition, it investigates whether there is a difference between librarians’ and students’ preferences for specific features. Design/methodology/approach – The research is based on 18 semi-structured interviews conducted in July 2012 with three groups of library users from The University of Sheffield: librarians; Master of Arts Librarianship students; and a group of other post-graduate students. Findings – Overall, this study suggests that while the next-generation catalogue interfaces and features are useful, they are not as “intuitive” as some previous studies have claimed. Interviewees appeared to prefer the searching and browsing options over the Web 2.0 features. Both librarians and students have similar opinions regarding the usefulness of next-generation OPAC features, but preferences are complex. Research limitations/implications – The study is based on one institution, and the disciplinary background of the post-graduate students was limited. Practical implications – Promoting next generation OPACs and explaining their features to users is essential. Originality/value – The paper adds to the understanding of users’ preferences in relation to next-generation OPACs, locating the findings of the current findings firmly in the context of previous literature.
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Papadakis, Ioannis, Michalis Stefanidakis, and Aikaterini Tzali. "Visualizing OPAC subject headings." Library Hi Tech 26, no. 1 (March 7, 2008): 19–23. http://dx.doi.org/10.1108/07378830810857762.

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Garza, Alejandro. "From OPAC to CMS." Library Hi Tech 27, no. 2 (June 12, 2009): 252–67. http://dx.doi.org/10.1108/07378830910968209.

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Y, Chandramohan Reddy, and Madhuri K. "Distributed OPAC System Using Z39.50 Protocol." INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY 10, no. 5 (August 20, 2013): 1675–81. http://dx.doi.org/10.24297/ijct.v10i5.4150.

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Online Public Access Catalogue is playing a vital role in Central Libraries and University/College Libraries. Most of the College libraries are using OPAC for easy search and retrieval of the books and it's Status in a Particular Library. The main limitation in the OPAC we are using in current system is; that we are able to search and retrieve the information about the books of that particular library, but not outside of it. When we have a scenario like if we have multiple libraries in a campus, if we need to search a book in all the libraries, we have only two possibilities to build OPAC, once to make the single database for all the Libraries or you need to ask the user to search in all OPAC Systems of respective Library manually. But both above solutions are not feasible in real time environment. So in order to have the above scenario a feasible solution we need to build a distributed environment for the OPAC, which will have all the individual databases connected remotely.
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Dissertations / Theses on the topic "OPAC systems"

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姍, 路., and Shan Lu. "Coding and decoding for multiuser communication systems." Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12863897/?lang=0, 2014. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12863897/?lang=0.

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本論文は、多端子通信路に対するマルチユーザ符号化および復号の研究成果をまとめたものである。多重接続加算通信路による情報伝送において、複数ユーザの稼働状態を識別するための誤り訂正可能なシグネチャ符号の構成を論ず,全伝送率の高いシグネチャ符号の一般的な構成法を解明する.双方向中継通信路では、2ユーザターボ符号に対する復号の演算量を低減させる復号法を提案する。加法性白色ガウス雑音環境下では復号性能を劣化することなく、レイリーフェージング環境下では僅かな劣化にとどめながら、復号の演算量を約半分程度に低減することができる.
Coding and decoding for multiuser communication systems are investigated. For MAAC, we propose a coding scheme of (k + 1)-ary error-correcting signature codes. We give binary and non-binary signature codes. They are the best error-correcting signature codes for MAAC, in the sense that they have highest sum rates known. For TWRC, we propose a low-complexity two-user turbo decoding scheme when turbo codes are applied in two users. The approximate decoding algorithm preserves low decoding complexity over the Gaussian TWRC, without much performance degradation.
博士(工学)
Doctor of Philosophy in Engineering
同志社大学
Doshisha University
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Pentarchou, Konstantina. "Web 2.0 tools integration in Online Public AccessCatalogue (OPAC) : users desires and motivation." Thesis, Linnéuniversitetet, Institutionen för informatik (IK), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-36326.

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This research aimed to investigate the desires of the users of the Greek public Library on Gender and Equality (LGE) about a future Online Public Access Catalogue (OPAC) containing Web2.0 functionalities. The concepts of participation, information pluralism and community building in relation with Web 2.0 tools in libraries’ catalogues were introduced under the theoretical approach provided by Social Critical Theory of Jürgen Habermas. Aqualitative research based on semi-structured interviews with users of the LGE wasconducted and the collected data that were analysed with the thematic analysis method,revealed positive users’ impressions regarding the introduction of Web 2.0 tools in theLGE’s OPAC. The research also disclosed users’ desires and suggestions regarding specific Web 2.0 features and their common motivation to participate and contribute to be the opportunity of communicating with like-minded people.
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昌三, 藤原. "Studies on new molten salt systems for high temperature molten salt batteries." Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12222785/?lang=0, 2011. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12222785/?lang=0.

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優樹, 西田, and Yuki Nishida. "Studies on linear systems and the eigenvalue problem over the max-plus algebra." Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13158503/?lang=0, 2021. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13158503/?lang=0.

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Max-plus代数は，実数全体に無限小元を付加した集合に，加法として最大値をとる演算，乗法として通常の加法を考えた代数系である．本論文では，max-plus線形方程式に対するCramerの公式の類似物を用いて，線形方程式の解空間の基底が構成できることを示した．さらに固有値問題に関連して，max-plus行列の固有ベクトルの概念を2通りの観点から拡張した．
The max-plus algebra is the semiring with addition "max" and multiplication "+". In the present thesis, the author gives a combinatorial characterization of solutions of linear systems in terms of the max-plus Cramer's rule. Further, the author extends the concept of eigenvectors of max-plus matrices from two different perspectives.
博士(理学)
Doctor of Philosophy in Science
同志社大学
Doshisha University
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エドアード, ラマス ホルヘ, and Jorge Eduardo Lamas de Anda. "Conceptual study on the energy independence of fuel cell cogeneration systems using solar energy." Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12981850/?lang=0, 2016. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12981850/?lang=0.

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この論文では従来電力系統から自立的に利用出来る太陽エネルギー及び燃料電池コジェネレーションシステムの徹底的な解析が述べられている。開発した水素マイクログリッドの燃料依存を最小化にする数理モデルを利用し日本社会でのさまざまなシナリオのシミュレーションが行なわれた。こういうシステムの実現性が従来水素燃料供給方法の審査及び日本の中型離島の事例研究で評価された。経済的な分析によって石油の価格が高い遠隔な地域では水素マイクログリッドは競争力があると分かった。
This thesis presents a thorough analysis on energy supply systems using solar energy and fuel cell cogeneration systems that can operate reliably and independently from the main power grid. A mathematical model to maximize fuel independence for hydrogen micro-grids is developed and simulated for various scenarios in Japanese communities. The viability of implementing such systems is assessed with a review of available hydrogen supply channels, and a study case for a remote Japanese island of medium size. An economic analysis of this study suggests that hydrogen micro-grids are economically competitive for energy supply in remote areas where oil prices are high.
博士(工学)
Doctor of Philosophy in Engineering
同志社大学
Doshisha University
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Georgiev, Milen Svetoslavov. "Optimizations of morphology, behaviour and evolution in multi-agent systems for predator-prey pursuit problem." Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13155945/?lang=0, 2020. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13155945/?lang=0.

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The objective of this research improving the overall performance of MAS by minimizing the time needed to solve the predator-prey problem by evolutionary optimizing (coevolving) both the morphology and behaviour of agents, and minimizing the runtime needed by evolutionary framework – genetic programming to successfully accomplish such a coevolution. The experimental results obtained suggest that an asymmetric morphology of the very simple predator agents coevolved with their intricate “driving” behaviour results in a most efficient behaviour of the agents.
博士(工学)
Doctor of Philosophy in Engineering
同志社大学
Doshisha University
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7

インダ, プラティヴィ アウリア, and Aulia Indah Pratiwi. "Study on succinic acid extraction by liquid membranes and aqueous two-phase systems containing ionic liquids." Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12902967/?lang=0, 2015. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12902967/?lang=0.

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近年発酵生産が注目されているコハク酸の抽出分離法についてイオン液体を含む液膜法及び水性２相抽出法を用いて研究した．イオン液体を含む含浸型液膜により，受容相に塩酸水溶液を用いることでコハク酸の上り坂輸送を達成できた．次にイオン液体を含む高分子溶媒膜によるコハク酸の透過を検討した．最適な条件は含浸液膜と異なり，透過にはコハク酸の各化学種が関与していた．最後に水溶性有機溶媒やイオン液体を用いた水性２相抽出法によるコハク酸の抽出を行った．塩および糖を相分離剤とすることで，発酵液で想定されるコハク酸の80％以上の抽出が達成できた．
Succinic acid is widely used in many industrial sectors; pharmacy, textile, food, etc. The bio-production of succinic acid from renewable resource was desired because the petrochemical production of succinic acid became costly. In this study, the extraction and separation techniques of succinic acid by liquid membranes (LMs) and aqueous two-phase system (ATPS) containing ionic liquids (ILs) were exploited. The permeation mechanisms and optical conditions were elucidated.
博士(工学)
Doctor of Philosophy in Engineering
同志社大学
Doshisha University
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芳葳, 黄., and Fang Wei Huang. "Evolving social behavior of caribou agents in wolf-caribou predator-prey pursuit problem." Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13106314/?lang=0, 2019. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13106314/?lang=0.

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We investigate an approach to apply Genetic Programming for the evolution of optimal escaping strategies of a team of caribou agents in the wolf-caribou predator prey problem (WCPPP) where the WCPPP is comprised of a team of caribou agents attempting to escape from a single yet superior (in terms of sensory abilities, raw speed, and maximum energy) wolf agent in a simulated twodimensional infinite toroidal world. We empirically verify our hypothesis that the incorporation of empathy in caribou agents significantly improves both the evolution efficiency of the escaping behavior and the effectiveness of such a behavior. This finding may be viewed as a verification of the survival value of empathy and the resulting compassionate behavior of the escaping caribou agents. Moreover, considering the fact that a single caribou cannot escape from the superior wolf, the ability of a team of empathic caribou agents to escape may also be viewed as an illustration of the emergent nature of a successful escaping behavior – in that the team-level properties are more than the mere sum of the properties of the individual entities. Within this context, we also present empirical results that verify the complex (nonlinear) nature of the relationship between the size of team of caribou agents and the efficiency of their escaping behavior.
博士(工学)
Doctor of Philosophy in Engineering
同志社大学
Doshisha University
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9

浩輝, 遠藤, and Hiroaki Endo. "蓄電池併設型太陽光発電用パワーコンディショナを活用したエネルギーマネジメントシステムに関する研究." Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13127435/?lang=0, 2020. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13127435/?lang=0.

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本論文では，電力利用率向上と需給バランス調整に寄与する蓄電池付太陽光PCSの新たな制御法について検討を行い，その有効性を確認している。受電点の潮流に応じてPCSの力率を制御することで，逆潮流時には系統電圧の上昇を抑制しつつ，順潮流時には負荷への電力利用率を向上する手法を提案し，フィールド試験により有効性を定量評価した。また，受電電力の制御目標値を可変とする制御を用い目標値を最適化することで，新たな機器を付加する必要なく上げ下げのDRに対応し需給バランスを調整する制御手法を提案し，その有効性をシミュレーションおよび実機により検証した。
博士(工学)
Doctor of Philosophy in Engineering
同志社大学
Doshisha University
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Chatzipanagiotou, Niki. "Advancing an Academic Library's services through application of Soft Systems Methodology." Thesis, Linnéuniversitetet, Institutionen för informatik (IK), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-36022.

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The Master thesis focuses on the application of Information Systems in the field of Library and Information Science.  Within the context of organizational learning, a collaborative user-centered approach is used to produce desired system characteristics and future research suggestions. More specifically, this research study explores the library users’ and academic librarians’ perceptions of the current library discovery and access services as mediated through the Online Public Access Catalogue (OPAC) of the Academic Library of the School of Philosophy at Athens University in Greece. Additionally, it explores their desired characteristics for the ‘public facing’ Integrated Library System (ILS), of which the OPAC constitutes a module, in order to generate recommendations that guide the Academic Library staff members’ collaborative design of a more user-centered library information system. The study is built upon the systems thinking framework of Checkland’s Soft Systems Methodology (SSM). Applied theories and design processes guide research processes aimed at advancing both inclusive social learning and system improvements.
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Books on the topic "OPAC systems"

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Ayres, F. H. The Bradford OPAC 2: Managing and displaying retrievals from a distributed search in Z39.50. Boston Spa: British Library Research and Innovation Centre, 1998.

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Virtanen, Seppo. Finlex-opas. Helsinki: Lakimiesliiton Kustannus, 1987.

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Commission, Wyoming Water Development, and Sunrise Engineering Inc, eds. Opal regional system. Afton, WY: Sunrise Engineering, 2000.

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Commission, Wyoming Water Development. Opal regional system. Afton, WY: Sunrise Engineering, 2001.

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Biddle & Associates. Career passport: The OPAC system test preparation manual. Upper Saddle River, N.J: Prentice Hall, 1998.

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Damm, Matthias. OPC Unified Architecture. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2009.

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Mark, Pejtersen Annelise, and Nordic Council of Ministers, eds. Subject access to Scandinavian fiction literature: Index methods and OPAC development. Copenhagen: Nordic Council of Ministers, 1996.

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System, Alliance Library, Mid-Illinois Talking Book Center, Illinois State Library. Talking Book and Braille Service., Online Programming for All Libraries (Program), and TAP Information Services, eds. Online Programming for All Libraries: OPAL. Blue Springs, MO: TAP Information Services, 2004.

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A, Ventrice Carl, and United States. National Aeronautics and Space Administration., eds. Investigation of the collision line broadening problem as applicable to the NASA Optical Plume Anomaly Detection (OPAD) system, phase I: Final report. Cookeville, Tenn: Center for Electric Power, Tennessee Technological University, 1995.

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Thackray, Nicholas James. A measurement of mixing in the B0B0 system and extraction of the Z0 coupling to b quarks using prompt leptons at OPAL. Birmingham: University of Birmingham, 1993.

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Book chapters on the topic "OPAC systems"

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Zhigeng, Wang. "Rebuilding the Library OPAC." In Web Information Systems – WISE 2006 Workshops, 153–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11906070_15.

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Mahnke, Wolfgang, and Stefan-Helmut Leitner. "System Architecture." In OPC Unified Architecture, 265–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-68899-0_9.

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Maslova, Olga, Elena Efremenko, Tat'yana Mahlis, Ol'ga Sen'ko, Nikolay Stepanov, and Mariya Andriyanova. "Microbial biocatalysts in the biocatalytic processes of the degradation of organophosphorus compounds." In ORGANOPHOSPHORUS NEUROTOXINS, 288–318. ru: Publishing Center RIOR, 2020. http://dx.doi.org/10.29039/43_288-318.

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A number of single microorganisms and microbial consortia, carrying out the destruction of organophosphorus compounds (OPC) by using their own enzymatic systems, were identified and investigated. They can use OPC as a source of nutrients such as carbon and/or phosphorus. The rate of OPC decomposition varies and depends mainly on environmental conditions (pH, temperature, availability of oxigen, etc.) and composition of native microbial community. The development of genetically modified organisms capable of degrading OPC, the immobilization of cells and the creation of artificial consortia are approaches that increase the efficiency of biodegradation of OPC.
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Maslova, Olga, Elena Efremenko, Il'ya Lyagin, Ol'ga Sen'ko, and Aslanli Aslanli. "Immobilized enzymatic biocatalysts and their application for destruction of organophosphorus compounds in water, soil and air systems." In ORGANOPHOSPHORUS NEUROTOXINS, 340–60. ru: Publishing Center RIOR, 2020. http://dx.doi.org/10.29039/52_340-360.

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Undecomposed residues of organophosphorus compounds (OPC) after treatment with pesticides of plants or animals often fall into natural objects (water, soil and air). Modern approaches to the immobilization of enzymes allowing obtaining of stable biological products are described, as well as the possible using of immobilized enzymes for the decomposition of different OPC: paraoxone, methyl and ethyl paraoxone, coumaphos, parathion, methyl and ethyl parathion, chlorpyrifos, soman, VX, methylphosphonic acid and its isobutyl and diisobutyl ethers, diisopropyl fluorophosphate.
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Jia, Zhiping, and Xin Li. "OPC-based Architecture of Embedded Web Server." In Embedded Software and Systems, 362–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11535409_51.

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Eremenko, Arkadiy, Il'ya Kurochkin, and Nataliya Nechaeva. "Bioanalytical systems based on cholinesterases for detection of organophosphates." In ORGANOPHOSPHORUS NEUROTOXINS, 205–18. ru: Publishing Center RIOR, 2020. http://dx.doi.org/10.29039/32_205-218.

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Various types of electrochemical sensors based on the inhibition of butyrylcholinesterase (BChE) have been presented for the analysis of organophosphates (OPC). A special design of thick film sensors and electrochemical detector for cholinesterases assay and their inhibitors in aqueous samples has been developed. For this assay, thiol sensitive sensors based on screen printed graphite electrode modified with nanoparticles of manganese dioxide were used. High sensitivity of manganese dioxide modified thick film sensors towards thiocholine and therefore low detection limit of BChE (1 pM) enabled their use for subnanomolar detection of an organophosphate pesticide diazinon, and other irreversible inhibitors of BChE. This work also presents modern innovative approach for the analysis of BChE by Raman spectroscopy. New SERS-substrates based on silver paste for sensitive quantification of BChE activity were obtained, characterized and applied to thiocholine detection, with LOD (TCh) being 260 nM. Real samples of human plasma were analyzed; a good correlation between spectrophotometric detection and Raman detection was shown. The developed technique is inexpensive and easy-to-use and has promising potential for analysis of OPC.
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Eremenko, Arkadiy, Il'ya Kurochkin, and Nataliya Nechaeva. "Bioanalytical systems based on cholinesterases for detection of organophosphates." In Organophosphorous Neurotoxins, 0. ru: Publishing Center RIOR, 2020. http://dx.doi.org/10.29039/chapter_5e4132b6096d14.18045940.

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Various types of electrochemical sensors based on the inhibition of butyrylcholinesterase (BChE) have been presented for the analysis of organophosphates (OPC). A special design of thick film sensors and electrochemical detector for cholinesterases assay and their inhibitors in aqueous samples has been developed. For this assay, thiol sensitive sensors based on screen printed graphite electrode modified with nanoparticles of manganese dioxide were used. High sensitivity of manganese dioxide modified thick film sensors towards thiocholine and therefore low detection limit of BChE (1 pM) enabled their use for subnanomolar detection of an organophosphate pesticide diazinon, and other irreversible inhibitors of BChE. This work also presents modern innovative approach for the analysis of BChE by Raman spectroscopy. New SERS-substrates based on silver paste for sensitive quantification of BChE activity were obtained, characterized and applied to thiocholine detection, with LOD (TCh) being 260 nM. Real samples of human plasma were analyzed; a good correlation between spectrophotometric detection and Raman detection was shown. The developed technique is inexpensive and easy-to-use and has promising potential for analysis of OPC.
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Gonçalves, Marcos André, Paul Mather, Jun Wang, Ye Zhou, Ming Luo, Ryan Richardson, Rao Shen, Liang Xu, and Edward A. Fox. "Java MARIAN: From an OPAC to a Modern Digital Library System." In String Processing and Information Retrieval, 194–209. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-45735-6_18.

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Green, Edward L., Lenwood S. Heath, and Benjamin J. Keller. "Opal: A system for computing noncommutative gröbner bases." In Rewriting Techniques and Applications, 331–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/3-540-62950-5_83.

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Davidson, Paul. "The Price System, Conglomerate Energy Companies and OPEC." In Inflation, Open Economies and Resources, 407–21. London: Palgrave Macmillan UK, 1991. http://dx.doi.org/10.1007/978-1-349-11516-7_27.

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Conference papers on the topic "OPAC systems"

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Zainal, Haliza Binti, Ab Razak Bin Che Hussin, and Nor Fadzleen Binti Sa'don. "Web OPAC end user satisfaction from Library Science and Information System Perspectives." In 2013 International Conference on Research and Innovation in Information Systems (ICRIIS). IEEE, 2013. http://dx.doi.org/10.1109/icriis.2013.6716758.

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Towrie, M., P. Matousek, A. W. Parker, F. P. Taday, and W. T. Toner. "Two 40 Khz Repetition Rate Independently Tunable, Synchronised Femtosecond Pulses Generated In The Visible Using Optical Parametric Amplifiers." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/cleo_europe.1996.ctuo6.

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Many time-resolved spectroscopy techniques require two broadly and independently tunable, synchronised light pulses. Recent advances in short pulse laser technology and non-linear crystal materials have lead to rapid development of optical parametric oscillators (OPOs) and travelling wave optical parametric amplifiers (OPAs) capable of meeting these requirements. Our aim was to develop a multi-kilohertz repetition rate OPA system for femtosecond/picosecond, pump and probe time-resolved absorption and resonance Raman spectroscopies. We believe this work reports, for the first time, on synchronously pumped travelling wave OPAs. The design similar to that described in [1] was adopted for the development of the OPAs.
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Kafka, J. D., and M. L. Watts. "A Potassium Niobate OPA Pumped by an Amplified Ti:sapphire Laser." In International Conference on Ultrafast Phenomena. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/up.1996.tue.6.

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Optical parametric amplifiers (OPAs) have been used to extend the wavelength range available from amplified Ti:sapphire lasers [1,2]. These systems typically produce 100 fsec pulses throughout the visible and near infrared. Recently, there has been much interest in generating wavelengths beyond 3 μm, often by means of difference frequency mixing [3]. Direct generation of pulses from an OPA however, offers the potential for higher energy. We report, for the first time, generation of 3 to 5 μm pulses directly from a potassium niobate (KNbO3) OPA pumped by an amplified Ti:sapphire laser [4].
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Matousek, P., A. W. Parker, P. F. Taday, W. T. Toner, and M. Towrie. "Doubly Tunable Femtosecond Pulses Generated in the Visible using Optical Parametric Amplifiers for Time-resolved Spectroscopy." In Laser Applications to Chemical and Environmental Analysis. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/lacea.1996.lwd.3.

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Many time-resolved spectroscopy techniques require two broadly and independently tunable, synchronised light pulses. This requirement can be met by optical parametric oscillators (OPOs) [1] and travelling wave optical parametric amplifiers (OPAs) [2, 3, 4, 5]. The latter capable of providing higher pulse energies. Our aim was to develop a multikilohertz repetition rate OPA system capable of providing femtosecond/picosecond, synchronised and independently tunable pump and probe pulses in the visible part of the spectrum for time-resolved absorption and resonance Raman spectroscopies.
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Zhou, Xia, Jiaqi Li, Wenlong Zhang, Yajin Zhou, Wenbo Shen, and Kui Ren. "OPEC." In EuroSys '22: Seventeenth European Conference on Computer Systems. New York, NY, USA: ACM, 2022. http://dx.doi.org/10.1145/3492321.3519573.

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Grudinkin, S. A., S. F. Kaplan, N. F. Kartenko, D. A. Kurdyukov, and V. G. Golubev. "Photonic crystal properties of opal-hematite and opal-magnetite films." In Photonics, Devices, and Systems IV, edited by Pavel Tománek, Dagmar Senderáková, and Miroslav Hrabovský. SPIE, 2008. http://dx.doi.org/10.1117/12.818010.

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Khmelik, Oleg, and Pavlo Galkin. "DEVELOPMENT OF A TELEGRAM BOT FOR RECEIVING DATA FROM OPC SERVERS." In 2021 III International Scientific and Practical Conference Theoretical and Applied Aspects of Device Development on Microcontrollers and FPGAs. MC-ampFPGA-2021, 2021. http://dx.doi.org/10.35598/mcfpga.2021.012.

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Abstract It is important to develop programming of the embedded control system which allows the real-time system to change and actually program the built-in control system based on the PLC. Chatbot is a computer program developed on the basis of neural networks and machine learning technologies, which can be used to communicate in audio or text format , but chatbot can also be used to program embedded systems without changing the PLC program itself. The purpose of the work is to develop a chatbot in the Telegram service, which can be used to obtain information from embedded systems based on the OPC server and send the necessary information at the request of the user. Keywords: OPC, PLC, Telegram bot, Chatbot, embedded control system, data, servers, IoT, IIoT, machine learning technologies.
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Kolobov, Oleg, Anna Knyazeva, and Igor Turchanovsky. "Prototyping program platform to generate modern library services." In The Book. Culture. Education. Innovations. Russian National Public Library for Science and Technology, 2020. http://dx.doi.org/10.33186/978-5-85638-223-4-2020-122-126.

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A prototype for program platform for library services is examined. It is based on the microservice architecture and can be used as an individual service for various programs and apps, based on open protocol. The platform prototype is characterized in brief, along with different strategies for generating modern library services, i. e. OPAC, Distributed E-catalog, Awareness System and SEO. Platform prototype implementation does not depend on proprietary software.
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Peng, Peng-Chun, Feng-Kai Wu, Chin-Wang Huang, and Tzu-Lin Chang. "Microwave Bandpass Filter based on Multiwavelength Laser for Fiber-Wireless Systems." In Annual International Conference on Optoelectronics, Photonics & Applied Physics (OPAP 2014). GSTF, 2014. http://dx.doi.org/10.5176/2301-3516_opap14.12.

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Wang Yue and Yang Zhimin. "The study on priority-based location display in OPAC system." In 2010 IEEE 11th International Conference on Computer-Aided Industrial Design & Conceptual Design 1. IEEE, 2010. http://dx.doi.org/10.1109/caidcd.2010.5681980.

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Reports on the topic "OPAC systems"

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Armas, Elvira, and Magaly Lavadenz. The Observation Protocol for Academic Literacies (OPAL); A Tool for Supporting Teachers of English Language Learners. CEEL, 2011. http://dx.doi.org/10.15365/ceel.article.2011.1.

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Schools and school systems are experiencing an instructional support gap that results in limited opportunities for educators to analyze, reflect on and improve research-based practices for ELLs so that outcomes for culturally and linguistically diverse students can change. To address this need, an inter-disciplinary research team from the Center for Equity for English Learners, comprised of educational leaders, teachers, researchers, and content experts developed a classroom observational instrument—the Observation Protocol for Academic Literacies (OPAL). The OPAL is intended for teachers, educational leaders, coaches, and others to conduct focused classroom observations for three potential purposes: research/evaluation, professional development, and coaching. In this article the authors introduce the OPAL’s research base, describe how to use the OPAL tool, and provide examples of the applied use of the OPAL to support professional learning and evaluate a three-year school reform effort.
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Kommareddy, Vamsee, Clayton Hughes, Simon David Hammond, and Amro Awad. Opal: A Centralized Memory Manager for Investigating Disaggregated Memory Systems. Office of Scientific and Technical Information (OSTI), August 2018. http://dx.doi.org/10.2172/1467164.

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Khalil, James, MaryAnne Iwara, and Martine Zeuthen. Journeys through Extremism: The Experiences of Forced Recruits in Boko Haram. RESOLVE Network, September 2022. http://dx.doi.org/10.37805/cbags2022.2.

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This case study provides exploratory research into the personal journeys of forced recruits into Boko Haram, to examine how they entered the organization, the conditions they experienced in camps and settlements, their exits from the group, their subsequent experiences in state hands, and their perspectives about future reintegration. These themes are particularly pertinent given the mass disengagements from Boko Haram in spring 2022, and the extent to which federal and state systems lack the capacity to absorb and handle the large numbers involved. Research was undertaken at Operation Safe Corridor (OPSC), a program established in 2016 by the Nigerian state to provide an off-ramp for members of Boko Haram and Islamic State West Africa Province (ISWAP) deemed to be ‘low risk’ by military intelligence. Located at Mallam Sidi on the outskirts of Gombe, the OPSC program houses cohorts of around six hundred clients at any point in time. This report features the findings from thirteen in-depth interviews with participants in the OPSC program to provide important insights into the state-sponsored off-ramp from this group.
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Trowbridge, Christian A. The PL/OPA Multichannel Transmissometer Control and Data Acquisition System. Fort Belvoir, VA: Defense Technical Information Center, December 1990. http://dx.doi.org/10.21236/ada237842.

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EER SYSTEMS CORP VIENNA VA. C4RDP Support System (S2) Version 2.0 Needline Primary/Secondary Means of Transmission and Automation Equipment Supported by OPFAC Rules Module. Fort Belvoir, VA: Defense Technical Information Center, June 1993. http://dx.doi.org/10.21236/ada268441.

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Frank, Matthias, David N. Fittinghoff, Dan E. Bower, Owen B. Drury, John M. Dzenitis, Robert A. Buckles, Carter Munson, and Carl H. Wilde. Line-of-sight measurements for the NIF Neutron Imaging System and determination of line-of-sight offsets in OPAS 90-135 images. Office of Scientific and Technical Information (OSTI), May 2011. http://dx.doi.org/10.2172/1113514.

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Security Implications of OPC, OLE, DCOM, and RPC in Control Systems. Office of Scientific and Technical Information (OSTI), January 2006. http://dx.doi.org/10.2172/911825.

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