scholarly journals Separability-based selection of cost-effective control of multistep processes in limited time and money

2021 ◽  
Vol 2131 (3) ◽  
pp. 032110
Author(s):  
U Fayzullaev ◽  
Sh Tashmatova ◽  
K Kurbanova
Keyword(s):  
Optimal Control ◽  
Mathematical Models ◽  
Research Method ◽  
Analytical Description ◽  
Cost Effective ◽  
Effective Control ◽  
Limited Time ◽  
Multistage Processes ◽  
Technical Requirements ◽  
Selection Of

Abstract Modeling as a research method usually consists not in the preparation of proposals and the formation of technical requirements in the created sample, but at the stages of conceptual and technical design, in the development of product samples in systems using them, as well as in various tests. This article discusses optimal control of multi-step processes. Usually, in practice, the problem of constructing models of multistage processes, as a rule, is complicated by the universality, uncertainty and nonlinearity of the simulated objects, complete or partial lack of expert experience and analytical description of dependencies. Mathematical models describing chemical technology consider the partitioning of the state into discrete stages.

scholarly journals Prevention of Leptospirosis Infected Vector and Human Population by Multiple Control Variables

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Muhammad Altaf Khan ◽  
Saeed Islam ◽  
Sher Afzal Khan ◽  
Ilyas Khan ◽  
Sharidan Shafie ◽  
...  
Keyword(s):  
Optimal Control ◽  
Optimal Control Problem ◽  
Control Problem ◽  
Human Population ◽  
Cost Effective ◽  
Farm Animals ◽  
Effective Control ◽  
Multiple Control ◽  
Control Variables ◽  
Control Functions

Leptospirosis is an infectious disease that damages the liver and kidneys, found mainly in dogs and farm animals and caused by bacteria. In this paper, we present the optimal control problem applied to a dynamical leptospirosis infected vector and human population by using multiple control variables. First, we show the existence of the control problem and then use analytical and numerical techniques to investigate the existence cost effective control efforts for prevention of indirect and direct transmission of this disease. In order to do this, we consider three control functions two for human and one for vector population. We completely characterize the optimal control problem and compute the numerical solution of the optimality system using an iterative method.

scholarly journals Prevention of Influenza Pandemic by Multiple Control Strategies

2012 ◽  
Vol 2012 ◽  
pp. 1-14 ◽  
Author(s):  
Roman Ullah ◽  
Gul Zaman ◽  
Saeed Islam
Keyword(s):  
Optimal Control ◽  
Control Strategies ◽  
Influenza Pandemic ◽  
Antiviral Treatment ◽  
Cost Effective ◽  
Effective Control ◽  
Numerical Techniques ◽  
Multiple Control ◽  
Control Functions ◽  
Transmission Of Disease

We present the prevention of influenza pandemic by using multiple control functions. First, we adjust the control functions in the pandemic model, then we show the existence of the optimal control problem, and, by using both analytical and numerical techniques, we investigate cost-effective control effects for the prevention of transmission of disease. To do this, we use four control functions, the first one for increasing the effect of vaccination, the second one for the strategies to isolate infected individuals, and the last two for the antiviral treatment to control clinically infectious and hospitalization cases, respectively. We completely characterized the optimal control and compute the numerical solution of the optimality system by using an iterative method.

scholarly journals Multiple Control Strategies for Prevention of Avian Influenza Pandemic

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Roman Ullah ◽  
Gul Zaman ◽  
Saeed Islam
Keyword(s):  
Optimal Control ◽  
Avian Influenza ◽  
Control Strategies ◽  
Influenza Pandemic ◽  
Antiviral Treatment ◽  
Cost Effective ◽  
Effective Control ◽  
Multiple Control ◽  
Control Functions ◽  
The Cost

We present the prevention of avian influenza pandemic by adjusting multiple control functions in the human-to-human transmittable avian influenza model. First we show the existence of the optimal control problem; then by using both analytical and numerical techniques, we investigate the cost-effective control effects for the prevention of transmission of disease. To do this, we use three control functions, the effort to reduce the number of contacts with human infected with mutant avian influenza, the antiviral treatment of infected individuals, and the effort to reduce the number of infected birds. We completely characterized the optimal control and compute numerical solution of the optimality system by using an iterative method.

Simulating optimal vaccination times during cholera outbreaks

2014 ◽  
Vol 07 (02) ◽  
pp. 1450014 ◽  
Author(s):  
Chairat Modnak ◽  
Jin Wang ◽  
Zindoga Mukandavire
Keyword(s):  
Optimal Control ◽  
Control Measure ◽  
Cost Effective ◽  
Control Model ◽  
Effective Control ◽  
Cholera Outbreak ◽  
Open Question ◽  
Cholera Vaccines

The use of cholera vaccines has been increasingly recognized as an effective control measure in cholera endemic countries. However, guidelines for using vaccination during cholera outbreaks are still to be established, and it remains an open question as to how and when the vaccines should be deployed to best control ongoing cholera outbreaks. Here we formulate a new optimal control model to assess the value of cholera vaccines in epidemic settings and cost-effective optimal times to deploy a vaccine. Our results suggest that as long as the vaccine prices are sufficiently low, vaccination should always start from or immediately after the onset of a cholera outbreak.

Medical Literature Searches -How Many Bibliographic Databases are Needed for Sufficient Retrieval in Medical Topics?

1985 ◽  
Vol 24 (03) ◽  
pp. 163-165 ◽  
Author(s):  
K. John
Keyword(s):  
Medical Literature ◽  
Cost Effective ◽  
Medical Faculty ◽  
Bibliographic Databases ◽  
Literature Searches ◽  
Selection Of

SummaryAs many bibliographic services in medicine are offered, literature searches in eight databases at DIMDI were performed to find out which database is most important in medicine. The distribution of publications from members of the medical faculty of Frankfurt University was examined. No save prediction is possible as to which database will yield most articles. Overlapping from different databases is often rather low. The selection of an appropriate database mix for sufficient recall and in a cost-effective manner.is a task for an experienced searcher.

Pola Bimbingan Orang Tua Asuh dalam Menumbuhkan Kecerdasan Emosional Remaja

2019 ◽  
Vol 7 (3) ◽  
pp. 311-330
Author(s):  
Iva Faridha Azahro ◽  
Nanih Machendrawaty ◽  
Hajir Tajiri
Keyword(s):  
Emotional Intelligence ◽  
Foster Care ◽  
Research Method ◽  
Foster Parents ◽  
Data Gathering ◽  
Qualitative Approach ◽  
Research Results ◽  
Descriptive Research ◽  
Selection Of

Tujuan dari peneliti ini yaitu untuk mengetahui (1) karakteristik kecerdasan emosional remaja di RPSAA Ciumbuleuit Bandung; (2) pola bimbingan orang tua asuh dalam menumbuhkan kecerdasan emosional remaja di RPSAA Ciumbuleuit Bandung; (3) hasil pola bimbingan orang tua asuh dalam menumbuhkan kecerdasan emosional remaja di RPSAA Ciumbuleuit Bandung. Penelitian ini menggunakan pendekatan kualitatif dengan metode penelitian deskriptif, pemilihan subjek dan informan dengan cara acak dan teknik pengumpulan datanya melalui observasi, dokumentasi dan wawancara terhadap enam orang anak asuh dan tiga orang tua asuh. Hasil penelitian yang diperoleh peneliti menyimpulkan bahwa anak sebelum memperoleh pengasuhan dari orang tua asuh di RPSAA memiliki karakteristik kecerdasan emosional rendah. Pola pengasuhan yang diterapkan di RPSAA kepada anak asuh adalah pola asuh demokratis. Sedangkan hasil pengasuhan dalam menumbuhkan kecerdasan emosional remaja di RPSAA Ciumbuleuit Bandung menyimpulkan bahwa anak asuh usia remaja telah memiliki kecerdasan emosional yang cukup baik, yaitu terlihat dari bagaimana cara mereka mampu mengendalikan segala perasaan yang pada dirinya, meskipun ada remaja yang belum sepenuhnya memenuhi aspek kecerdasan emosional.   The goal of these researchers is to figure out (1) characteristics of the emotional intelligence of teenagers in RPSAA Ciumbuleuit Bandung; (2) foster parents guidance pattern in fostering emotional intelligence RPSAA Ciumbuleuit Bandung in adolescents; (3) results foster parents guidance pattern in fostering emotional intelligence RPSAA Ciumbuleuit Bandung in teens. This research used the qualitative approach with descriptive research method, the selection of subjects and informants by means of random and data gathering techniques through observation, interview and documentation against six people and three foster care parents foster care. The research results obtained by researchers concluded that child before obtaining care of foster parents in RPSAA has the characteristic of low emotional intelligence. Parenting patterns are applied in the RPSAA to foster care parenting is democratic. While parenting results in fostering emotional intelligence RPSAA Ciumbuleuit Bandung teenager in concluding that foster care teens have had a pretty good emotional intelligence, that is visible from how they are able to control all the feelings on him, even though there are teenagers who do not yet fully meet aspects of emotional intelligence.

Teknologi Esktrasi dan Cara Pemisahannya untuk Mendapatkan Kembali Karotenoid dari Minyak Sawit : Suatu Tinjauan

2016 ◽  
Vol 9 (1) ◽  
pp. 80-95
Author(s):  
Agus Sudibyo ◽  
Sardjono Sardjono
Keyword(s):  
Vitamin A ◽  
Palm Oil ◽  
Beta Carotene ◽  
Cost Effective ◽  
Raw Material ◽  
Extraction And Separation ◽  
Molecular Product ◽  
Industrial Use ◽  
Palm Oil Mill ◽  
Selection Of

Crude palm oil (CPO)is the richest natural plant source of carotenoids in terms of retinol (pro-vitamin A) equivalent, whereas palm oil mill effluent (POME) is generated from palm oil industry that contains oil and carotenes that used to be treated before discharge. Carotenoids are importance in animals and humans for the purpose of the enhancement of immune response, conversion of vitamin A and scavenging of oxygen radicals. This component has different nutritional  functions and benefits to humaan health. The growing interest in the other natural sources of beta-carotene and growing awareness to prevent pollution has stimulated the industrial use of CPO and POME as a raw material for carotenoids extraction. Various technologies of extraction and separation have been developed in order to recover of carotenoids.This article reports on various technologies that have been developed in order to recover of carotenoids from being destroyed in commercial refining of palm oil and effects of some various treatments on the extraction end separation for carotenoid from palm oil and carotenoids concentration. Principally, there are different technologies, and there is one some future which is the use of solvent. Solvent plays important role  in the most technologiest, however the problem of solvents which are used is that they posses potentiaal fire health and environmental hazards. Hence selection of the  most safe, environmentally friendly and cost effective solvent is important to design of alternative extraction methods.Chemical molecular product design is one of the methods that are becoming more popular nowadays for finding solvent with the desired properties prior to experimental testing.ABSTRAKMinyak sawit kasar merupakan sumber karotenoid terkaya yang berasal dari tanaman sawit sebagai senyawa yang sama dengan retinol atau pro-vitamin A; sedangkan limbah pengolahan minyak sawit dihasilkan dari industri pengolahan minyak sawit yang berisi minyak dan karotene yang perlu diberi perlakuan terlebih dahulu sebelum dibuang. Karotenoid merupakan bahan penting yang diperlukan pada hewan dan manusia guna memperkuat tanggapan terhadap kekebalan, konversi ke vitamin A dan penangkapan gugus oksigen radikal. Dengan berkembangnya ketertarikan dalam mencari beta-karotene yang bersumber dari alam lain dan meningkatnya kesadaran untuk mencegah adanya pencemaran lingkungan, maka mendorong suatu industri untuk menggunakan CPO dan POME sebagai bahan baku untuk diekstrak karotenoidnya. Berbagai macam teknologi guna mengekstrak dan memisahkan karotenoid telah dikembangkan untuk mendapatkan kembali karotenoidnya. Makalah ini melaporkan dan membahas berbagai jenis teknologi yang telah dikembangkan guna mendapatkan kembali senyawa karotenoid dari kerusakan di dalam proses pemurnian minyak sawit secara komersial dan pengaruh beberapa perlakuan terhadap ekstrasi dan pemisahan karotenoid dari minyak sawit dan konsentrasi karotenoidnya. Pada prinsipnya, berbagai teknologi yang digunakan untuk mengekstrak dan memisahkan karotenoid terdapat perbedaan, dan terdapat salah satu teknologi yang digunakan untuk esktrasi dan pemisahan karotenoid adalah menggunakan bahan pelarut. Pelarut yang digunakan mempunyai peranan yang penting dalam teknologi ekstrasi; namun pelarut yang digunakan untuk mengekstrak tersebut mempunyai persoalan karena berpotensi mengganggu kesehatan dan membahayakan cemaran lingkungan. Oleh karena itu, pemilihan jenis teknologi yang aman, ramah terhadap lingkungan dan biaya yang efektif untuk penggunaan pelarut merupakan hal penting sebelum dilakukan desain metode/teknologi alternatif untuk esktrasi karotenoid. Pola produk molekuler kimia merupakan salah satu metode yang saat ini menjadi lebih populer untuk mencari pelarut dengan sifat-sifat yang dikehendaki sebelum diujicobakan. Kata kunci :    karotenoid, ekstrasi, pemisahan, teknologi, minyak sawit kasar, limbah industri pengolahan sawit.

Is it worth doing fieldwork with this organisation? A method for considering context before conducting fieldwork research in Sport for development and peace.

2020 ◽  
Author(s):  
Tegwen Gadais ◽  
Laurie Décarpentrie ◽  
Andrew Webb ◽  
Marie Belle Ayoub ◽  
Mariann Bardocz-Bencsik ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Research Method ◽  
Sustainable Development Goals ◽  
Field Work ◽  
Limited Resources ◽  
Limited Time ◽  
Sport For Development ◽  
Development Goals ◽  
The Cost ◽  
Existing Data

Much has been written about sport as a tool for development and peace. But more research on Sport for Development and Peace (SDP) organizations, is needed to better understand their actual contributions to the UNs sustainable development goals. Yet, the unstable, risky, and restricted contexts in which many NGOs and SDP agencies operate often leaves researchers struggling to find effective yet feasible methods through which to examine agencies in these fields. Indeed, conducting field work on and with SDP agency often implies allocating significant quantities of researcher’s limited time, funding, and other vital resources. And as limited resources need to be invested wisely, SDP researchers will clearly need to prepare their fieldwork. Nevertheless, there are but a handful of methodological papers that address the question of how to prepare for SDP field work. In other words, the question of how we know if it is worthwhile, and safe enough, to proceed with SDP field work remains. Building on previous research, the purpose of this study is to raise important ontological and epistemological questions about what can be known about a given context, before setting off on fieldwork. We further explore the use of the Actantial Model as a research method for analyzing existing data before deciding whether to conduct fieldwork in complex and frequently insecure situations. In other words, will the cost (material, temporal, financial, and physical) of conducting fieldwork be worth it? By applying the Actantial Model, with the specific aim of informing decisions regarding subsequent fieldwork, to one specific case, contributions regarding the pertinence of conducting fieldwork are provided.

Two-stage chemical-biological treatment at Thessaloniki greater area WWTP - experiences and potentials

1995 ◽  
Vol 32 (9-10) ◽  
pp. 75-84 ◽  
Author(s):  
A. D. Andreadakis ◽  
G. H. Kristensen ◽  
A. Papadopoulos ◽  
C. Oikonomopoulos
Keyword(s):  
Biological Treatment ◽  
Treatment Plant ◽  
Cost Effective ◽  
Primary Treatment ◽  
Effective Control ◽  
Two Stage ◽  
Effluent Quality ◽  
Filamentous Microorganisms ◽  
Sludge Settling ◽  
The City

The wastewater from the city of Thessaloniki is discharged without treatment to the nearby inner part of the Thessaloniki Gulf. The existing, since 1989, treatment plant offers only primary treatment and did not operate since the expected effluent quality is not suitable for safe disposal to the available recipients. Upgrading of the plant for advanced biological treatment, including seasonal nitrogen removal, is due from 1995. In the mean time, after minor modifications completed in February 1992, the existing plant was put into operation as a two-stage chemical-biological treatment plant for 40 000 m3 d−1, which corresponds to about 35% of the total sewage flow. The operational results obtained during the two years operation period are presented and evaluated. All sewage and sludge treatment units of the plant perform better than expected, with the exception of the poor sludge settling characteristics, due to severe and persistent bulking caused by excessive growth of filamentous microorganisms, particularly M. Parvicella. Effective control of the bulking problem could lead to more cost-effective operation and increased influent flows.

Analisa Pengujian Repeatability Timbangan Elektronik dengan Metode Syarat Teknis Timbangan Non Otomatis dan Metode NMI Australia

2019 ◽  
Vol 4 (2) ◽  
pp. 176-183
Author(s):  
Ponco Wali
Keyword(s):  
Research Method ◽  
Test Methods ◽  
Test Results ◽  
Repeat Testing ◽  
Testing Method ◽  
Technical Requirements

Testing repeat electronic scales with non-automatic scales technical requirements so far is fairly long if not using a calculator or computer. The aim of this research is to compare the repeatability testing method of electronic scales using methods according to the technical requirements of non-automatic scales and the Australian NMI method, both of which refer to OIML R76 in determining the validity or cancellation of electronic scales repeatability testing. This research method is done through repeat testing on 3 samples of electronic scales, then on each electronic scale 2 test methods are performed. The conclusion is that the electronic scales repeatability testing uses the non-automatic scales technical requirements method and the Australian NMI method has some differences although both refer to OIML R76. These differences include several points, namely the charge used, the method of adding additions, the formula for determining electronic scales, and different test results. The Australian NMI method is deemed to make it easier and more time efficient compared to the non-automatic weighing technical requirements method.

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