Network analysis models – the secret for success

2004 ◽  
Vol 4 (5-6) ◽  
pp. 383-388
Author(s):  
D.M. Rogers
Keyword(s):  
Mathematical Model ◽  
Field Data ◽  
Essential Element ◽  
Distribution Networks ◽  
Automatic Calibration ◽  
Supply And Distribution ◽  
The World ◽  
Optimum Approach ◽  
Analysis Models

Water is a fundamental necessity of life. Yet water supply and distribution networks the world over are old and lacking in adequate maintenance. Consequently they often leak as much water as they deliver and provide an unacceptable quality of service to the customer. In certain parts of the world, water is available only for a few hours of the day. The solution is to build a mathematical model to simulate the operation of the real network in all of its key elements and apply it to optimise its operation. To be of value, the results of the model must be compared with field data. This process is known as calibration and is an essential element in the construction of an accurate model. This paper outlines the optimum approach to building and calibrating a mathematical model and how it can be applied to automatic calibration systems.

Mathematical Representation of Quality of Service (QoS) Parameters for Internet of Things (IoT)

2020 ◽  
pp. 364-376
Author(s):  
Sandesh Mahamure ◽  
Poonam N. Railkar ◽  
Parikshit N. Mahalle
Keyword(s):  
Mathematical Model ◽  
Quality Of Service ◽  
Internet Of Things ◽  
Gap Analysis ◽  
Literature Survey ◽  
Mathematical Representation ◽  
The World ◽  
Qos Parameters ◽  
The Mathematical Model

Now we are in the era of ubiquitous computing. Internet of things (IoT) is getting matured in various parts of the world. In coming few years' billions and trillions of things will be connected to the internet. To deal with these huge number of devices in a network we need to consider Quality of Service (QoS)parameters so that system operations can be performed in a smoother way. Mathematical modelling of these QoS parameters gives an idea about which factors are needs to consider while designing any IoT-enabled system at the same time it will give the performance analysis of the system before implementation. In this paper comprehensive literature survey is done to discuss various issues related to QoS and gap analysis is also done for IoT Enabled systems. This paper proposes general steps to build a mathematical model for a system. It also proposes the mathematical model for QoS parameters like reliability, communication complexities, latency and aggregation of data for IoT. To support proposed mathematical model proof of concept also given.

scholarly journals A model predictive controller of the blowing mode during basic oxygen furnance process

2021 ◽  
pp. 61-66
Author(s):  
Oleksandr Stepanets ◽  
Yurii Mariiash
Keyword(s):  
Mathematical Model ◽  
Cast Iron ◽  
Model Predictive Control ◽  
Predictive Control ◽  
Basic Oxygen Furnace ◽  
Scrap Metal ◽  
Basic Oxygen ◽  
The World ◽  
The Cost

Today in Ukraine and the world, the problem of energy saving and reducing the cost of smelted steel is state of art. Metallurgical enterprises are developing in conditions of fierce competition, the main reason is that Ukrainian products are extremely energy-intensive due to the depreciation of fixed assets and outdated technological processes. The basic oxygen furnace process is a process of producing steel from liquid cast iron with the addition of steel scrap to the converter and blowing oxygen from above through a water-cooling lance. Nowadays, the production of steel by BOF process is the most popular in the world and is becoming increasingly common. The main disadvantage of the basic oxygen furnace is the need to provide the initial amount of heat (in the form of liquid cast iron) and as a consequence - restrictions on the processing of scrap metal. Reducing the cost of basic oxygen furnace steel is achieved by increasing the share of scrap metal by increasing the degree of afterburning of CO to CO2 in the cavity of the converter, by optimal control of the parameters of the blast mode using model-predictive control. The principle of model-predictive control is based on a mathematical model of the plant. This approach minimizes the functional that characterizes the quality of the process. The linear-quadratic functional was chosen. A forecasting model is proposed taking into account the constraint on changing the position of the lance and the pneumatic oxygen supply valve. It was found that the change in the rate of decarburization of the metal depends on the distance of the lance to the level of the quiet bath and affects the degree of afterburning of CO to CO2. The decarburization process is non-stationary, described by a first-order inertial model, the transfer coefficient and time constant of which depends on the melting period and the duration of the purge. The mathematical model of the blast mode of oxygen-converter melting has been improved, taking into account the influence of the blast intensity on the decarburization process of the bath, which allowed to increase the accuracy and quality of blast control in terms of changing oxygen flow during purging. The simulation results of the automatic control system show that the model-predictive regulator provides the required level of carbon dioxide in the converter gases when the flow rate of oxygen for purge changes.

scholarly journals The integrated network model of pipeline, sea and road distribution of petroleum product

2016 ◽  
Vol 6 (2) ◽  
pp. 151-165 ◽  
Author(s):  
Ömer Öztürkoğlu ◽  
Oyewale Lawal
Keyword(s):  
Mathematical Model ◽  
Petroleum Product ◽  
Distribution Systems ◽  
Petroleum Industry ◽  
End User ◽  
Single Product ◽  
Integrated Network ◽  
Supply And Distribution ◽  
The World ◽  
Effective Channel

Nigeria ranks high among the community of oil producers both in the world. It is, therefore, paradoxical that Nigeria, with such profile in Organization of Petroleum Exporting Countries (OPEC) statistics finds it difficult to optimize its supply distribution while spending so much money on transportation and distribution. This paper thus reviews the petroleum product supply and distribution systems in the country. Thus, we develop a single period, single product deterministic mathematical model to effectively distribute the product to the end user through the most effective channel to the interest of the economy of the country. In our model, we first consider a perfect condition in the petroleum industry irrespective of the production crises and conflicts like pipeline vandalism, communal instability. We then consider different scnearios that presumes several breakdown cases in pipeline connection to anaylze the survivability of the network of petroleum distribution.

scholarly journals UCalib: Cameras Autocalibration on Coastal Video Monitoring Systems

2021 ◽  
Vol 13 (14) ◽  
pp. 2795
Author(s):  
Gonzalo Simarro ◽  
Daniel Calvete ◽  
Paola Souto
Keyword(s):  
Feature Detection ◽  
Low Cost ◽  
Video Monitoring ◽  
Monitoring Systems ◽  
Automatic Calibration ◽  
The World ◽  
Quantitative Results ◽  
Calibrated Images ◽  
Favorable Conditions

Following the path set out by the “Argus” project, video monitoring stations have become a very popular low cost tool to continuously monitor beaches around the world. For these stations to be able to offer quantitative results, the cameras must be calibrated. Cameras are typically calibrated when installed, and, at best, extrinsic calibrations are performed from time to time. However, intra-day variations of camera calibration parameters due to thermal factors, or other kinds of uncontrolled movements, have been shown to introduce significant errors when transforming the pixels to real world coordinates. Departing from well-known feature detection and matching algorithms from computer vision, this paper presents a methodology to automatically calibrate cameras, in the intra-day time scale, from a small number of manually calibrated images. For the three cameras analyzed here, the proposed methodology allows for automatic calibration of >90% of the images in favorable conditions (images with many fixed features) and ∼40% in the worst conditioned camera (almost featureless images). The results can be improved by increasing the number of manually calibrated images. Further, the procedure provides the user with two values that allow for the assessment of the expected quality of each automatic calibration. The proposed methodology, here applied to Argus-like stations, is applicable e.g., in CoastSnap sites, where each image corresponds to a different camera.

Correction of functional constipation in patients with limited mobility after stroke

2019 ◽  
Vol 1 (6) ◽  
pp. 53-55
Author(s):  
M. S. Turchina ◽  
M. V. Bukreeva ◽  
L. Yu. Korolyova ◽  
Zh. E. Annenkova ◽  
L. G. Polyakov
Keyword(s):  
Quality Of Life ◽  
Chronic Constipation ◽  
Functional Constipation ◽  
Cerebrovascular Diseases ◽  
Medical Rehabilitation ◽  
Stroke Patients ◽  
Limited Mobility ◽  
Complete Restoration ◽  
The World

Currently, the problem of early rehabilitation of stroke patients is important, since in terms of the prevalence of cerebrovascular diseases and disability after suffering a stroke, Russia is one of the first places in the world. The complex of medical rehabilitation of such patients should provide for the early and most complete restoration of all body functions, patient education for lost skills, re-socialization of the patient and improvement of the quality of life. One of the factors contributing to a significant reduction in the quality of life after a stroke is the development of chronic constipation. The article reflects the modern methods of correction of chronic constipation in patients with limited mobility.

HASTANELERİN HİZMET KALİTESİNİN HASTA TATMİN ÖLÇEĞİ İLE ÖLÇÜLMESİ: KARABÜK DEVLET HASTANESİNDE YATAN HASTALAR ÜZERİNDE BİR ARAŞTIRMA THE MEASUREMENT SERVICE QUALITY OF THE HOSPITALS BY THE PATIENT SCALE: A RESEARCH ON THE PATIENTS IN KARABUK STATE HOSP

2013 ◽  
Vol 1 (1) ◽  
pp. 100
Author(s):  
Selçuk Yurtsever
Keyword(s):  
Patient Satisfaction ◽  
Health Services ◽  
Literature Review ◽  
Private Sector ◽  
State Hospital ◽  
Continuous Change ◽  
Satisfaction Scale ◽  
The World ◽  
Main Factors

It has been known that both in the world and in Turkey a continuous change has been experienced in the provision of health services in recent years. In this sense by adopting the customer(client) focused approach of either public or private sector hospitals; it has been seen that they are in the struggle for presenting a right, fast, trustuble, comfy service. The purpose of this research is to measure the satisfaction degree, expectations and perceptions of the patients in Karabük State Hospital through comparison. In this context, the patient satisfaction scale which has been developed as a result of literature review has been used and by this scale it has been tried to measure the satisfaction levels of the patients in terms of material and human factors which are the two main factors of the service that was presented. In the study, with the scales of Servqual and 0-100 Points together, in the part of the analysis MANOVA have been used. The expectations and the perceptions of the patient has been compared first by generally and then by separating to different groups according to the various criterias and in thisway it has been tried to be measured their satisfaction levels. According to the results that were obtained, although, the satisfaction levels of the patients who have taken service from Karabük State Hospital are high in terms of thedoctors and the nurses; it has been reached to the result that their satisfaction levels are low in terms of the materials that have been used at the presenting of the service and the management.

IN SEARCH OF EDUCATIONAL STRATEGY FOR UKRAINE

2016 ◽  
Author(s):  
Viсtor Ognevyuk
Keyword(s):  
Secondary Education ◽  
Primary Education ◽  
School Management ◽  
Education Quality ◽  
Quality Of Education ◽  
Global Competitiveness ◽  
The World ◽  
Management School ◽  
Global Competitiveness Report

The article deals with the world rating of Ukrainian educational sphere according to The Global Competitiveness Report and UNESCO Science Report. It shows comparative indices of Ukraine in contrast to the other countries of these world ratings according to the “Quality of primary education”, “Penetration of primary education”, “Penetration of secondary education”, “Quality of secondary education”, “Quality of education in Sciences”, “Quality of school management”, “School access to the internet” and others. The article also defines strategic directions of reforming Ukrainian education system to improve its position in the world international ratings.

konsep dasar, prinsip dan peranan supervisi

2020 ◽  
Author(s):  
Isra Revenia
Keyword(s):  
Education Quality ◽  
School Staff ◽  
The World

When we compare with the quality of the best education in the world, Indonesia can catagorized as far behind. This can be seen from the achievments of students who become rejected measuring education quality in improving the qualitu of education, education supervision has very important role in developing education quality. Supervision can be interpreted as a coaching activity that has been planned to assist teachers and staff and other school staff in carrying out work effectively so that it gets good results. Supervision is a process that is applied to a job that has been carried out and even evaluates and corrects the work I to match what was determined from the start.

Peningkatan Teknologi Informasi Melalui Supervisi Pendidikan

2019 ◽  
Author(s):  
Rika ramadani ◽  
Hade Afriansyah
Keyword(s):  
Information Technology ◽  
Learning Process ◽  
Quality Of Education ◽  
Information Technology Education ◽  
Use Of Technology ◽  
Ongoing Training ◽  
The World ◽  
Teacher Supervisors

Progress in information technology that is so fast is expected to improve the quality of education in Indonesia. In the world of information technology education can help and support the learning process. Especially now all the learning process activities can be done online. Progress in information technology must also be supported by quality human resources. In this case the teacher is very instrumental in the utilization of information technology in the world of education. Because the teacher is one of the education supervisors who will encourage the advancement of the quality of education in Indonesia. But in reality the quality of teachers in Indonesia is inadequate. There are still many teachers who cannot use information technology in learning especially for teachers who are senior or old. As teacher supervisors, they must improve the quality of their performance in using technology. To improve the ability of teachers to use technology, ongoing training is needed to use technology. The role of the head of the school as a supervisor is also needed, namely the principal is obliged to supervise, control, and approach the teacher in terms of the use of technology in the learning process.

STUDI ANALISIS DAMPAK PADEMI COVID-19 TERHADAP EKSISTENSI PEMBELAJARAN PENDIDIKAN AGAMA ISLAM DI INDONESIA

Edupedia ◽  
2020 ◽  
Vol 5 (1) ◽  
pp. 45-53
Author(s):  
Ilzam Dhaifi
Keyword(s):  
Online Education ◽  
Religious Education ◽  
Virtual Classroom ◽  
Education Services ◽  
Religious Consciousness ◽  
The Core ◽  
Equal Education ◽  
The World ◽  
The Government

The world has been surprised by the emergence of a COVID 19 pandemic, was born in China, and widespread to various countries in the world. In Indonesia, the government issued several policies to break the COVID 19 pandemic chain, which also triggered some pro-cons in the midst of society. One of the policies government takes is the closure of learning access directly at school and moving the learning process from physical class to a virtual classroom or known as online learning. In the economic sector also affects the parents’ financial ability to provide sufficient funds to support the implementation of distance learning applied by the government. The implications of the distance education policy are of course the quality of learning, including the subjects of Islamic religious education, which is essentially aimed at planting knowledge, skills, and religious consciousness to form the character of the students. Online education must certainly be precise, in order to provide equal education services to all students, prepare teachers to master the technology, and seek the core learning of Islamic religious education can still be done well.

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