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Wyświetlanie 1-15 z 44
Tytuł:
Fairway traffic intersection processes models
Autorzy:
Majzner, P.
Powiązania:
https://bibliotekanauki.pl/articles/360024.pdf
Data publikacji:
2014
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
intersection
fairway
delay
waiting vessel
Opis:
This author presents models of processes taking place at a waterway intersection. The measures of traffic processes under consideration are the number of vessels waiting to enter an intersection and delay time of these vessels. The applicability of specific models is discussed along with their usefulness as a function if input intensity of vessel stream flowing into a waterway intersection.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 38 (110); 62-68
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Time to treatment of prostate cancer patients
Autorzy:
Rucińska, Monika
Osowiecka, Karolina
Gałka, Szymon
Środa, Radosław
Wojciechowski, Piotr
Sugajska, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1035802.pdf
Data publikacji:
2018
Wydawca:
Medical Education
Tematy:
prostate cancer
waiting for treatment
Opis:
Prostate cancer is one of the most common cancers in men. The incidence of prostate cancer increases systematically. The correlation between waiting time for oncological treatment and survival prognosis in prostate cancer is not clearly determined. The aim of the study was to estimate the waiting time from suspicion until prostate cancer diagnosis and treatment in Warmia and Mazury Voivodeship. Ninety-six consecutive prostate cancer patients treated with radical radiotherapy between November 2016 and June 2017 in the Department of Radiation Oncology of the Hospital of the Ministry of Internal Affairs with Warmia and Mazury Oncology Center in Olsztyn were included in the analysis. A questionnaire prepared especially for this study, and individual interviews with patients were used in the study. The obtained data was supplemented with medical records and hospital databases. In the case of twenty-nine men, the PSA concentration was measured due to urinary disorders, and the median time from symptoms until the first PSA test in that group was 168 days. The median time from PSA concentration > 4 ng/ml to biopsy of prostate cancer and start of treatment for all patients was 62 and 156 days, respectively. Hormone therapy was administered the quickest. A positive correlation was observed between the waiting time from histopathological confirmation of prostate cancer until treatment, and the distance from one’s place of residence to the oncological center (p < 0.05).
Źródło:
OncoReview; 2018, 8, 3; 86-93
2450-6125
Pojawia się w:
OncoReview
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
WAITING TIMES HEALTH POLICY IN POLAND
Autorzy:
Wolan, Maja
Jacek, Anna
Gugała, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/915818.pdf
Data publikacji:
2017
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
waiting list
health care
law
Polska
Opis:
In Poland, a provisions of the Act of 27 August 2004 on health care services financed from public funds1 defines the principles of the waiting list . Waiting list is one of the way to ensure equal access to health care services . Running waiting lists for health care services is the statutory duty of all providers and considers only first-time patients . The Act of 27 August specifies the responsibilities of the provider in relation to the patient, and to managing the waiting lists . Provider is obliged to give the patient information on the scope of health care services, the waiting time for health services, and information regarding the confirmation of the right to health care benefits at the first visit of the patient . In addition, a patient at the point of registration should receive comprehensive information on clinics . Minister of Health in regulation of 26 September 2005 on medical criteria, described what criteria should be guided by the provider entering a beneficiary on waiting lists for health care services . In case of deterioration of patients’ health, which may indicate the need to provide earlier health care service, the patient is obliged to inform the provider . Then, for medical reasons, the time of providing the health care service should be adjusted . Health care provider has no right to refuse to register patient on the waiting list to obtain health care servic. National Health Fund web sites provide information on waiting lists main-tained by individual providers, the number of people, by urgent cases and cases of a stable, and the average waiting time for providing medical services and infor-mation about other healthcare providers who offer benefits in within a shorter period of time
Źródło:
Review of European and Comparative Law; 2017, 29, 2; 33-45
2545-384X
Pojawia się w:
Review of European and Comparative Law
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Econometric model for planning the industrial production
Autorzy:
Dima, I. C.
Grabara, J.
Kolcun, M.
Powiązania:
https://bibliotekanauki.pl/articles/122860.pdf
Data publikacji:
2013
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
discipline of waiting
average waiting time of the machines in the system
average number of machines
Opis:
In industrial practice, there are frequent cases when a performer randomly serves the machines at time intervals, which prevents the elements of carrying out the processing procedure from being predetermined. Situations of random interventions on the multiserved machines occur more often in textile industry on the spinning machines, looms, knitting machines, wire weaving and interlacing machines, etc.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2013, 12, 1; 11-20
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CP approach to design of steady-state flow of repetitive manufacturing processes in SME
Autorzy:
Wójcik, R.
Bocewicz, G.
Powiązania:
https://bibliotekanauki.pl/articles/118159.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
production planning
waiting-free schedules design
constraint logic programming
Opis:
Concurrent execution of work orders in the small and medium size enterprises (SME) imposes a necessity to consider many control problems concerning systems of repetitive concurrent manufacturing processes using common resources in mutual exclusion. In many cases a production system with a given structure of the processes resource requests can be seen as composed of subsystems with n cyclic processes sharing one resource. For given sets of possible values of the processes operation execution times a problem of finding schedules guaranteeing that no process waits for access to the common resources is considered. In particular for the assigned times of the operations execution a subproblem of finding all possible starting times of work orders execution for which waiting-free schedules exist has been formulated as a constraint programming (CP) problem. The starting times derived can be used as an alternative starting times of work orders execution in case of their possible delays. A state space of the problem’s solutions has been reduced using constraints based on the necessary and sufficient conditions for existence of a waiting-free n-process steady-state schedule. An illustrative example of Mozart-based software application to the solution of constraint logic programming problem considered has been presented.
Źródło:
Applied Computer Science; 2005, 1, 1; 201-218
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical Analysis of Message Delay in SIP Proxy Server
Autorzy:
Abaev, P.
Razumchik, R.
Uglov, I.
Powiązania:
https://bibliotekanauki.pl/articles/958112.pdf
Data publikacji:
2014
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
single hop delay
SIP server
statistical analysis
waiting time
Opis:
Single hop delay of SIP message going through SIP proxy server operating in carriers backbone network is being analyzed. Results indicate that message sojourn times inside SIP server in most cases do not exceed order of tens of milliseconds (99% of all SIP-I messages experience less than 21 ms of sojourn delay) but there were observed very large delays which can hardly be attributed to message specic processing procedures. It is observed that delays are very variable. Delay components distribution that is to identied are not exponentially distributed or nearly constant even per message type or size. The authors show that measured waiting time and minimum transit time through SIP server can be approximated by acyclic phase-type distributions but accuracy of approximation at very high values of quantiles depends on the number outliers in the data. This nding suggests that modeling of SIP server with queueing system of GjPHjc type may server as an adequate solution.
Źródło:
Journal of Telecommunications and Information Technology; 2014, 4; 79-87
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zamierzenia prokreacyjne a możliwość ich realizacji w kontekście czynników biologicznych
Autorzy:
Tymicki, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1828242.pdf
Data publikacji:
2013-12-06
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
reproductive ageing
fecundity
waiting time to pregnancy
infertility
fertility
Opis:
The article presents both theoretical and empirical aspects of studies on fertility intentions in the context of factors shaping fecundity. In most contemporary societies couples declare their preference for two children. These declarations stand in opposition to registered total fertility rates, both period and cohort rates, which rarely reach value of 2 in Europe. The gap between fertility intentions and their realization might be partially explained by the impact of reproductive ageing (biological factors) which may play an increasingly significant role due to postponement of childbearing. A natural pattern of a decrease in fecundity over age might influence on reproductive outcome of women who postpone to conceive a child, and consequently results in an increased risk of involuntary childlessness or lower parity progression ratios. The data coming from the Generations and Gender Survey in Poland (GGS-PL) makes it possible to check the main hypothesis about an age-specific decrease in fecundity, which is manifested by a prolonged waiting time to pregnancy. The data were collected via the retrospective questions included into the GGS-PL questionnaire. Results show that there is a significant increase in waiting time to pregnancy among women older than 34 years. This finding supports theoretical predictions concerning the age-related decrease in fecundity. Its relevance is discussed by referring to explanations of the gap between fertility intentions and completed fertility in terms of voluntary and involuntary childlessness, as well as biological factors related to reproductive ageing.
Źródło:
Studia Demograficzne; 2013, 164, 2; 11-33
0039-3134
Pojawia się w:
Studia Demograficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Corona Discharge Based Meters for Manufacturing of Conducting Microwires
Autorzy:
Tergeussizova, Aliya S.
Bakhtaev, Shabden A.
Wojcik, Waldemar
Aitchanov, Bekmurza H.
Mussapirova, Gulzada D.
Toygozhinova, Aynur Zh.
Powiązania:
https://bibliotekanauki.pl/articles/1844645.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
corona discharge
measuring method
pulse signal
measuring accuracy
waiting mode
Opis:
The wide variety of electrode shapes and their arrangement relative to each other, as well as the possibility of corona discharge in the ambient air, have created prerequisites for the development of a number of new methods and corona discharge transducers designed to measure microwire parameters and linear dimensions of various objects. The principally new non-contact control method is based on the dependence of the corona discharge current value on the diameter of the corona wire placed inside the discharge chamber. This paper provides an overview of this method.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 2; 283-288
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
„Zanim adopcja zapuka do drzwi” – narracje pracowników wspierających dziecko w okresie oczekiwania
„Before Adoption Knocks at the Door” − the Narration of the People Supporting a Child in Expectancy
Autorzy:
Ładyżyński, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1811173.pdf
Data publikacji:
2017
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
adopcja
dziecko
oczekiwanie na adopcję
adoption
child
waiting for adoption
Opis:
Artykuł omawia etap bezpośrednio poprzedzający adopcję. W świetle wywiadów z pracownikami wspomagającymi ten proces ukazano trzy aspekty: postrzeganie dziecka, przygotowanie go do przysposobienia oraz fazę rozstania się dziecka z rodziną zastępczą jako moment szczególny. Okres poprzedzający adopcję może być czasem pomocy dziecku w przygotowaniach do spotkania z nowymi rodzicami, a także radenia sobie z ogromem towarzyszących temu przemieszczeniu uczuć. Bardzo wiele zależy od osób zajmujących się dzieckiem w instytucjach pośredniczących, sporo od osób pracujących z kandydatami na rodziców adopcyjnych, a także od samych potencjalnych nowych opiekunów. Z narracji wynika, że to jest czas trudny nie tylko dla dziecka, ale również dla podmiotów z nim obcujących.
The paper discusses the phase immediately preceding adoption. In the light of the interviews with the people supporting this process, 3 of its aspects have been presented: perception of a child, preparation of the child to adoption and a phase of separation of the child with a foster family as a special moment in its life. The time preceding adoption can sometimes be helpful for a child to prepare for meeting its new parents and dealing with the vastness of feelings' alternation accompanying it. A great resposibility lays on the people taking care of the child in the intermediate institutions, the people working with the future parents and as well on the potential new caretakers. The narration provides a proof that this is a very diffucult time not only for the child, but also for all the people taking care of it.
Źródło:
Roczniki Pedagogiczne; 2017, 9(45), 4; 57-69
2080-850X
Pojawia się w:
Roczniki Pedagogiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the system with vacations under poissonian input stream and constant service times
Autorzy:
Sosnowski, M.
Burakowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/309584.pdf
Data publikacji:
2013
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
approximation analysis
buffer dimensioning
mean waiting times
system with vacations
Opis:
In the paper approximate formulas for the mean waiting times and the buffer dimensioning in the system with vacations fed by the stream of Poissonian type with constant service times is shown. Furthermore, in the considered system the time intervals of the availability/notavailability of the service are constant and are run alternately according to the assumed cycle. More precisely, presented approach begin with derivation of the mean waiting times and, on the basis of this, the required buffer size for guaranteeing the losses less than predefined value is estimated. The accuracy of the presented analytical formulas is on a satisfactory level. The formulas were used for the System IIP dimensioning.
Źródło:
Journal of Telecommunications and Information Technology; 2013, 3; 3-8
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Suboptymalizacja krytycznych parametrów kolejki w systemach masowej obsługi
Suboptimalization of critical railway parametrs in massage systems
Autorzy:
Ficoń, Krzysztof
Krasnodębski, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/1385470.pdf
Data publikacji:
2019
Wydawca:
Polskie Wydawnictwo Ekonomiczne
Tematy:
kolejka
czas oczekiwania
zgłoszenie
obsługa
queue
waiting time
application
service
Opis:
W pracy wskazano na możliwość wykorzystania teorii masowej do optymalizacji krytycznych parametrów kolejek, będących zmorą współczesnej cywilizacji, nie tylko społecznej. Przeanalizowano mechanizm powstawania kolejek, za pomocą metod rachunku prawdopodobieństwa zidentyfikowano jego przyczyny i skutki. Rozważania teoretyczne zilustrowano na drodze analitycznej analizując dwa przykładowe warianty badawcze. Przedmiotem badań były krytyczne parametry kolejki, obejmujące średnią długość kolejki i średni czas oczekiwania. W wariancie pierwszym skupiono się na sterowaniu intensywnością strumienia zgłoszeń, natomiast w wariancie drugim przyjęto bardziej praktyczne sterowanie intensywnością strumienia obsługi.
The paper indicates the possibility of using mass theory to optimize the critical parameters of queues, which are the bane of modern civilization, not only social. The mechanism of queuing was analyzed, its causes and effects were identified using probability calculus methods. Theoretical considerations are illustrated by analytical analysis of two example research variants. The subject of the research were the critical parameters of the queue, including the average queue length and average waiting time. The first variant focused on controlling the intensity of the notification stream, while the second variant adopted a more practical control of the intensity of the service stream.
Źródło:
Gospodarka Materiałowa i Logistyka; 2019, 5; 31-39
1231-2037
Pojawia się w:
Gospodarka Materiałowa i Logistyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Discussion on the transient behavior of single server Markovian multiple variant vacation queues
Autorzy:
Vadivukarasi, Manickam
Kalidass, Kaliappan
Powiązania:
https://bibliotekanauki.pl/articles/2099427.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Markovian queue
multiple variant vacations
transient solution
waiting-time distribution
Opis:
We consider an M/M/1 queue where beneficiary visits occur singly. Once the beneficiary level in the system becomes zero, the server takes a vacation at once. If the server finds no beneficiaries in the system, then the server can take another vacation after the return from the vacation. This process continues until the server has exhaustively taken all the J vacations. The closed form transient solution of the considered model and some important time-dependent performance measures are obtained. Further, the steady state system size distribution is obtained from the time-dependent solution. A stochastic decomposition structure of waiting time distribution and expression for the additional waiting time due to the presence of server vacations are studied. Numerical assessments are presented.
Źródło:
Operations Research and Decisions; 2021, 31, 1; 123--146
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Level crossing activation time prediction in dependence on the train real speed
Autorzy:
Havryliuk, V.
Powiązania:
https://bibliotekanauki.pl/articles/393709.pdf
Data publikacji:
2018
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
telematics
transport
level crossings
waiting time
telematyka
przejazdy kolejowe
czas oczekiwania
Opis:
The analysis of accidents at level crossings showed that a significant number of them have been occurred at the automatic crossings with signalling lights and automatic half barrier crossings. One of the main causes of accidents is that road users do not obey the warning signals at crossings due to excessive waiting time because real speeds of different trains can vary greatly, while approach distance to crossings is determined for the fastest trains with maximum permissible speed. The purpose of this work is the mathematical justifi cation of the method for the level crossing activation time prediction in dependence on the real speed of an approaching train, based on measurements of input track circuits’ impedance at approach section. The investigations have been carried out by mathematical modeling of track circuits’ operation modes during train movement. The relative error of the method has been determined.
Źródło:
Archives of Transport System Telematics; 2018, 11, 2; 3-5
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alfred Schütz Revisited: Social Exclusion of Refugees in Brandenburg
Autorzy:
Zalewski, Ingmar
Powiązania:
https://bibliotekanauki.pl/articles/2106830.pdf
Data publikacji:
2022-04-30
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Refugees
Integration Processes
Imposed Waiting
Social Exclusion
Subjective Meaning
Alfred Schütz
Opis:
For refugees, the transition from their home to the host society is especially challenging. In particular, their situation shortly after arrival entails the risk of social exclusion. Based on two case studies, this article reconstructs experiences of exclusion within the integration processes of Cameroonian refugee men and unaccompanied minors in the region of Brandenburg, Germany. What connects the studies are the existential threats of being forced to wait due to having an unclear future and a pattern of being unable to refer to (positive) lived experiences in the local environment. The article approaches these dynamics by applying Alfred Schütz as a helpful analytical heuristic to the findings. The possibilities and pitfalls of the deployed Schützean framework are highlighted considering current methodological developments in the field.
Źródło:
Qualitative Sociology Review; 2022, 18, 2; 72-88
1733-8077
Pojawia się w:
Qualitative Sociology Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparative analysis of (s, Q) and (s, S) ordering policies in a queuing-inventory system with stock-dependent arrival and queue-dependent service process
Autorzy:
Sugapriya, Chandrasekaran
Nithya, Murugesan
Jeganathan, Kathirvel
Selvakumar, Subramanian
Harikrishnan, Thanushkodi
Powiązania:
https://bibliotekanauki.pl/articles/27315339.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
stock-dependent arrival
queue-dependent service
infinite waiting hall
ordering principles
Opis:
This article deals with a Markovian queuing-inventory system (MQIS) under the stochastic modeling technique. The arrival stream of this system is dependent on the present stock level at an instant. Meanwhile, the system focuses on reducing the waiting time of a unit by assuming a queue-dependent service policy (QDSP). The system consists of an infinite waiting hall to receive an arriving unit. The MQIS assumes that no unit of arrival is allowed when the stock level of the system is empty. The discussion of this MQIS runs over the two types of ordering principles named 1) (s, Q) 2) (s, S). According to both ordering principles, the assumed arrival and service patterns have been considered separately and classified as Model-I (M-I) and Model-II (M-II) respectively. The steady state of the system for both M-I and M-II is analysed and resolved under the Neuts matrix-geometric technique. The system performance measures of the system are also computed. The expected cost function of both M-I and M-II are constructed as well. Further, the necessary numerical illustrations are provided and distinguished for M-I and M-II to explore the proposed model. This paper finds the optimum ordering policy to execute the stock-dependent arrival and queue-dependent service strategies.
Źródło:
Operations Research and Decisions; 2023, 33, 2; 121--153
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
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