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Tytuł:
SEMIPARAMETRIC COX REGRESSION MODEL IN ESTIMATION OF SMALL AND MICRO ENTERPRISES’ SURVIVAL IN THE MALOPOLSKA VOIVODESHIP
Autorzy:
Ptak-Chmielewska, Aneta
Powiązania:
https://bibliotekanauki.pl/articles/453037.pdf
Data publikacji:
2013
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
survival analysis
Cox’s model
enterprises’ survival
Opis:
This paper aims at identifying factors (external and internal) affecting the ability of an enterprise to survive on the market. The analysis is based on the results of a retrospective study conducted in 2012 on a sample of enterprises from Malopolska voivodeship. Methods and models of event history analysis, including semiparametric Cox’s model were applied to analyse enterprises’ survival. The approach based on the event history analysis allows us to include dynamics of the process. The results provided extensive data on how factors such as size, activity sector, market range, legal form and internals conditions like: owner characteristics, investments, profits, reported barriers affect the survival of enterprises.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2013, 14, 2; 169-180
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Significance tests of differences between two crossing survival curves for small samples
Autorzy:
Jurkiewicz, Tomasz
Wycinka, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/657936.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
survival analysis
censoring
crossing survival curves
statistical power
effective sample size
Opis:
Analiza przeżycia to zespół metod służących do modelowania czasu trwania kohorty, której jednostki są obserwowane od zdefiniowanego momentu początkowego do zdefiniowanego zdarzenia końcowego. Czas trwania jest traktowany jako zmienna losowa ciągła. Specyfika metod analizy przeżycia związana jest z występowaniem obserwacji cenzurowanych (uciętych) oraz tym, iż funkcje gęstości obserwowanej zmiennej są często nieznane, a rozkłady silnie asymetryczne, co uniemożliwia stosowanie metod klasycznej statystyki. Podstawową funkcją stosowaną w analizie przeżycia jest funkcja dalszego trwania wyrażająca prawdopodobieństwo, że jednostka nie doświadczy zdarzenia końcowego przed czasem t. Metodą oceny, czy pewne zmienne mają wpływ na zróżnicowanie czasu trwania jednostek, jest przeprowadzanie testów porównujących krzywe przeżycia na podstawie dwóch (lub więcej prób). Znaczna liczba tych testów została zaproponowana w ostatnich latach, w tym testy: Log-rank, będący jednym z lub najpopularniejszym, test Gehana, Tarone-Ware, Peto-Peto, Harringtona-Fleminga, testy typu Renyi. W literaturze mało uwagi poświęca się jednakże porównaniu własności tych testów. W poniższym opracowaniu przeprowadzono, przy wykorzystaniu metody Monte Carlo, analizę porównawczą mocy predykcyjnej testów dla dwóch krzywych przeżycia w małych próbach z różnym udziałem jednostek cenzurowanych. Losowano próby z populacji o założonym rozkładzie Weibulla przy różnych proporcjach jednostek kompletnych i cenzurowanych (o losowej kolejności pojawiania się ustalanej w oparciu o rozkład jednostajny) w celu określenia efektywnej wielkości prób dla poszczególnych testów. Szczególną wagę poświęcono problemowi krzyżowania się krzywych przeżycia i zdolności testów do wykrywania różnic między krzywymi przeżycia w takiej sytuacji.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2011, 255
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Peroxiredoxin-1 as a prognostic factor in patients with ovarian cancer
Autorzy:
Sieńko, J.
Teliga-Czajkowska, J.
Przytula, E.
Czajkowski, K.
Smolarczyk, R.
Nowis, D.
Powiązania:
https://bibliotekanauki.pl/articles/2085041.pdf
Data publikacji:
2019
Wydawca:
Instytut Medycyny Wsi
Tematy:
Peroxiredoxin-1
PRDX-1
ovarian cancer
overall survival
disease free survival
Opis:
Introduction and objective. Peroxiredoxin-1 (PRDX-1) belongs to a family of antioxidant enzymes and has proved to be a versatile molecule regulating cell growth, differentiation and apoptosis. PRDX1-regulated signaling pathways play an important role in the progression and metastasis of human tumours, especially in breast, esophageal and lung cancers. The aim of the study was to evaluate the expression of PRDX-1 in ovarian cancer tissues, and to test the clinical value of PRDX-1 as a prognostic factor in this malignancy. Materials and method. PRDX-1 expression was assessed by automated immunohistochemistry in tumours taken from 55 patients with ovarian cancer during primary surgery. Specimen were formalin-fixed and preserved in paraffin-embedded blocks. The results were correlated with clinicopathological data. Results. A high expression of PRDX-1 was observed in 20% of cases, and was associated with worse compliance to chemotherapy protocol (P<0.002), worse response to chemotherapy (P<0.04), and higher levels of CA 125 after the 1st line treatment (P<0.004). PRDX-1 positive subjects had a significantly lower 5-year disease-free survival (9.1% vs. 42.6%, P<0.01) and a lower 5-year overall survival (9.1% vs. 56.7%; P<0.002). Multivariate analysis showed that a high expression of PRDX-1 is an independent prognostic factor of poor, overall survival (P<0.002) and a disease-free survival (P<0.01). Conclusion. Results of the study show that PRDX-1 expression in tumour tissues can be another biomarker of prognosis in patients with ovarian cancer.
Źródło:
Annals of Agricultural and Environmental Medicine; 2019, 26, 3; 415-419
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Partially Paramertic Estimation of Survival Function in the Right-censored Data
Częściowo parametryczny estymator funkcji przeżycia dla danych prawostronnie cenzurowanych
Autorzy:
Rossa, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/905270.pdf
Data publikacji:
2003
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
censored data
survival function
Opis:
Abstract. In many medical, biological or economic follow-up studies the subject of observation is survival, failure or duration time, that is the length of time elapsed from a specific starting point to an event of interest. In engineering applications it may be the time to failure of piece of equipment, in medical trials - time to occurrence of a particular disease or time to death of a patient due to some specific disease, in economic studies - time of being unemployed and so on. In the analysis of survival-type variables one is often faced with right-censored observations. Sometimes it is impossible to measure the true failure time of an individual due to previous occurrence of some other event called competing event, which result in interruption of observation before the event occurs. It may be withdrawal of the subject from the study or failure from some causes other the one of interest or simply limitation on the length of study. If we are only interested in failure time, then the competing events can be regarded as right-censoring the event of interest. It means that for each individual we observe either the time to failure or the time to censoring and for censored individuals we know only that the time to failure is greater then the censoring time. In reliability studies censoring is often planned in order to obtain information sooner than it is otherwise possible. Instead of testing m units until they fail, the Type I censoring design is employed in which more then m units are tested but observation is terminated earlier at the end of some specified period x*. Those units, which failed before this time yield complete observations and the rest of them is right-censored. Despite such incompleteness of the data it is often desired to estimate survival function that is the probability P(X > x) that the true failure time X in the population of individuals exceeds x. The paper deals with a problem of estimating survival function in the right-censored data. Some improvements of the well-known Kaplan - Meier estimator are discussed and their properties are studied.
W pracy omówione są dwa estymatory funkcji przeżycia, będące modyfikacją estymatora Kaplana-Meiera. Podstawowe własności statystyczne estymatorów zostały porównane za pomocą metod symulacyjnych.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2003, 164
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Survival of tunneled hemodialysis catheters after percutaneous placement
Autorzy:
Weber, Ewa
Liberek, Tomasz
Wołyniec, Wojciech
Gruszecki, Marcin
Rutkowski, Bolesław
Powiązania:
https://bibliotekanauki.pl/articles/1038854.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
hemodialysis
tunneled catheter
survival
Opis:
Background. Tunneled catheters are becoming increasingly used as a permanent dialysis access. Easy way of insertion and good long-term patency make them competitive to fistulas in some groups of patients. Methods. Late complications and survival of 180 tunneled catheters inserted from June 2010 to December 2013 in 171 unselected hemodialysis patients were analyzed. Results. The cumulative time of observation was 2103.5 patient-months and median observation was 9 months (range of 0.5-45 months). Only 19 out of 180 catheters were removed due to complications (12 for infections, 4 due to malfunction and 3 because of mechanical damage). Majority of catheters were removed electively: 27 after maturation of arterio-venous fistula (AVF), 4 after kidney transplant, 5 after transfer to peritoneal dialysis and 3 due to the recovery of renal function. At the end of the observation, 58 catheters were still in use and 64 patients had died with functioning catheter. When censored for elective catheter removal and patient death, 88.2% of catheters survived for 1 year. Catheter survival was significantly better in older patients (over 65 years, in comparison to patients < 65 years, p = 0.046). Conclusions. Nearly 90% of all inserted catheters gave reliable dialysis access as long as it was needed. Among them, over 30% of the inserted catheters were in use at the end of the observation period, and over 30% of patients had died with a functioning catheter. The results of tunneled catheters survival are encouraging and they should be taken into consideration during decision-making on vascular access, especially in the older patients.
Źródło:
Acta Biochimica Polonica; 2016, 63, 1; 139-143
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Does the type of business activity and the enterprise location affect a firm’s survival? Results of an analysis for natural persons conducting economic activity in the Łódzkie Voivodship
Czy rodzaj prowadzonej działalności i lokalizacja przedsiębiorstwa wpływają na czas jego trwania? Wyniki analizy dla osób fizycznych prowadzących działalność gospodarczą w województwie łódzkim
Autorzy:
Mikulec, Artur
Misztal, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/425175.pdf
Data publikacji:
2018
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
enterprises
duration analysis
Kaplan-Meier survival curve
Cox proportional-hazards model
survival trees
Opis:
The article presents the results of the duration analysis for 21,163 enterprises (natural persons conducting economic activity) established in the Łódzkie Voivodship in 2010 and observed until December 31, 2015. The Kaplan-Meier estimation of the survival function, the Cox proportionalhazards model and the recursive partitioning method (the CTree algorithm) are applied to achieve the goal of the conducted research i.e. to answer the following question: does the type of business activity and location of the enterprise affect its duration? Prediction error curves based on the bootstrap crossvalidation estimates of the prediction error are used to assess and compare predictions obtained from all three models. On the basis of the analysis results it can be assumed that the type of business activity makes firms more varied due to their duration compared to their location.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2018, 22, 3; 23-40
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trwałość pierwszych związków w kohortach urodzeniowych 1951-1960 oraz 1961-1970
Ability of first relationships for women from birth cohorts 1951–1960 and 1961–1970
Autorzy:
Borucka, Jadwiga
Romaniuk, Joanna
Frątczak, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/418312.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
demography
relationships stability
survival analysis
Opis:
A family, as the basic social unit has been a subject to statisticians' and demographists' research for many years. Recently, the marriage institution has changed not only regarding the age at which people marry and the number of children they have but also as concerns its stability. At the same time, alternative forms of family appeared, mostly cohabitations. Such a variety complicates analysis of functioning and stability of a family. It becomes even more complicated regarding the fact that cohabitation often precedes marriage thus it needs to be decided whether it should be analyzed independently or rather in relation to the marriage that comes next. However, increasing divorce rate as well as cohabitations which are more common lead to the question on the stability of marriages and informal relationships as well as other changes observed recently in this area. The main objective of the study is to analyze and compare the stability of first relationships for women from birth cohorts 1951-1960 and 1961-1970.Cohort analysis makes it possible to present the changes in marital stability that have been observed for women from demographic decline cohort (1961-1970) as compared to women from demographic bulge cohort (1951-1960). Analyzed data comes from the questionnaire D (Fertility in Poland) of the National Population and Housing Census 2002.
Źródło:
Studia Demograficzne; 2012, 161, 1; 103-127
0039-3134
Pojawia się w:
Studia Demograficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tumor budding as a new histological parameter in the metastasis of colorectal cancer
Autorzy:
Ustymowicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/1918641.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
colon cancer
5-year survival
Opis:
Introduction:The presence of tumor budding, i.e.,single cancer cells or a nest of poorly differentiated cells at the front of tumor invasion appears to be a new histopathological indicator of increased aggressiveness of colorectal carcinoma. Purpose: The aim of this work was a retrospective evaluation of the invasion front (tumorbudding, vascular invasion,and lymphocytic infiltration) in postoperative biopsies of patients with colorectal carcinoma and analysis of the 5-year survival. Materialsand methods:The study was based on the material received after surgical treatment of 164 patients with colon cancer. Tissue was obtained directly following tumor resection, fixed in 10% formaldehyde and embedded in paraffin blocks using a routine method by melting with paraffin at a temperature of 56º C. These samples were then routinely stained with haematoxylin and eosin and underwent a histopathological evaluation, with particular attention being paid to the invasion front of the tumor. The immunohistochemical expression of cytokeratin 20 was also evaluated using anti-human CK20 monoclonal antibody (clone Ks.20.8, Dako, Poland). Results: Tumor budding was found in 124 out of 164 patients. Statistical analysis showed a correlation between the presence of tumor budding TB and depth of invasion (pT), lymph node metastasis, distant metastasis, lymphocytic infiltration,and vascular invasion. The cumulative five-year survival correlated with the lack of tumor budding and vascular invasion, as well as a decrease in lymphocyticinfiltration.
Źródło:
Progress in Health Sciences; 2018, 8(2); 118-123
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On robust inference for the Cox model - the coxrobust package
Odporny test istotności dla modelu Coxa - teoria i zastosowania
Autorzy:
Bednarski, Tadeusz
Borowicz, Filip
Powiązania:
https://bibliotekanauki.pl/articles/907044.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
robust estimation
survival data analysis
Opis:
A methodology supporting the COXROBUST package, designed for the robust inference in the Cox regression model, is presented. Basic functions of the package and its data analytic capabilities are described.
Pierwsza części wykładu będzie prezentacją programu statystycznego służącego odpornej estymacji w modelu Сох’a - aplikacja opracowana na podstawie metody T. Bednarskiego (1993). Program ten została dołączony do zestawu pakietów statystycznych języka R, budowanego w ramach otwartego projektu. Teoretyczna część wykładu poświęcona będzie zagadnieniu odpornej weryfikacji istotności modelu Cox’a. Przedstawione będą wyniki analityczne związane z granicznym rozkładem stosownie zmodyfikowanej statystyki Walda - bazującej na odpornej estymacji parametrów regresji w modelu Cox’a. Ponadto zaprezentowane będą wyniki Monte Carlo umożliwiające ocenę stopnia bliskości rozkładu asymptotycznego z wynikami empirycznymi dla skończonych prób. Zaproponowana statystyka testowa została dołączona do wspomnianego wcześniej pakietu statystycznego.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2008, 216
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Models of Cox’s Proportional Hazards
Autorzy:
Deszyńska, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/748546.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Cox model, hazard, survival analysis
Opis:
Celem pracy jest prezentacja modelu hazardów proporcjonalnych Coxa(ang. Cox proportional hazards model), charakteryzujących go własności oraz metod esty-macji jego parametrów. Znajduje on zastosowanie w analizie przeżycia przy przewidywaniuszans przetrwania pewnych obiektów (najczęściej pacjentów w badaniach medycznych).Istotną zaletą modelu jest możliwość uwzględnienia w nim danych niepełnych, które częstopojawiają się w przeprowadzanych badaniach — zarówno w sposób losowy, jak i celowy.Model Coxa sprawdza się szczególnie dobrze w sytuacji, gdy interesujące jest określenieskuteczności sposobu leczenia w sensie porównawczym, czyli w odniesieniu do innych te-rapii. Terminologia i przykłady zaczerpnięte są na ogół z medycyny, ale opisany modelstosuje się również np. w socjologii, kryminalistyce czy inżynierii.Słowa kluczowe: model Coxa, hazard, analiza przeżycia.
The paper presents Cox proportional hazards model, its properties and methods of its parameters estimation. It is widely applicable in survival analysis – in prediction of survival chances of some objects (usually patients in medical studies). The essential advantage of the model is allowing of incomplete data, which often appear in studies –both in random and fixed way. Cox model works especially well when determination of treatment effectiveness in comparative sense (with reference to other therapies) is needed. Terminology and examples are usually taken from medicine but the model can be used also in sociology, crime detection or engineering.
Źródło:
Mathematica Applicanda; 2011, 39, 2
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tree-based induction of decision list from survival data
Autorzy:
Wróbel, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/333013.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
analiza przeżywalności
lista decyzji
zasada indukcji
survival analysis
survival trees
decision list
rule induction
Opis:
The paper presents an algorithm for induction of decision list from survival data. The algorithm uses a survival tree as the inner learner which is repeatedly executed in order to select the best rule at each iteration. The effectiveness of the algorithm was empirical tested for two implementations of survival trees on 15 benchmark datasets. The results show that proposed algorithm for survival decision list construction is able to induce more compact models than corresponding survival tree without the loss of the accuracy of predictions.
Źródło:
Journal of Medical Informatics & Technologies; 2012, 20; 73-78
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza mocy wybranych testów jednorodności czasów trwania dla populacji o rozkładzie Weibulla
The Power Analysis of Tests for Comparing Survival of Weibull Distributed Populations
Autorzy:
Sokołowski, Andrzej
Denkowska, Sabina
Fijorek, Kamil
Salamaga, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/422721.pdf
Data publikacji:
2013
Wydawca:
Główny Urząd Statystyczny
Tematy:
funkcja przeżycia
porównywanie funkcji przeżycia
badania symulacyjne
survival function
comparing survival
Monte Carlo research
Opis:
W ostatnim latach testy porównywania czasu trwania zjawisk znajdują coraz więcej zastosowań w analizie zagadnień ekonomicznych. Przykładami może być analiza czasu pozostawania na bezrobociu, czasu poszukiwania pracy, czasu istnienia przedsiębiorstwa, itp. W literaturze można spotkać wiele testów do porównywania funkcji przeżycia. Autorzy niniejszego opracowania zdecydowali się przeprowadzić badania symulacyjne, których celem jest porównanie efektywności najczęściej stosowanych testów służących do porównywania czasu trwania zjawisk, w wersji zaimplementowanej w pakiecie STATISTICA. Za pomocą symulacji badano poziom błędu pierwszego rodzaju oraz moc następujących testów statystycznych służących testowaniu hipotezy zerowej głoszącej równość krzywych przeżycia w dwóch populacjach. Analizie poddano następujące testy: Wilcoxona wg. Gehana, F Coxa, Coxa-Mantela, Wilcoxona wg. Peto i Peto i log-rank. W ramach symulacji generowano próby losowe z rozkładu Weibulla.
Recently, tests for comparing survival distributions become more and more popular and used in applied economics. Unemployment duration, time needed to find a new job, enterprise survival or waiting for a commodity to be sold are good examples. There are a number of tests to compare survival distributions proposed in statistical literature. The aim of this research was to analyze, by the means of computer simulations, the effectiveness of survival tests as implemented in STATISTICA software. The following tests have been outlined and compared: Wilcoxon, Geehan, Cox-Mantel, Peto & Peto and log rank. Random samples were generated from Weibull distribution.
Źródło:
Przegląd Statystyczny; 2013, 60, 3; 305-323
0033-2372
Pojawia się w:
Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deceptive behaviour of Colletotrichum truncatum: strategic survival as an asymptomatic endophyte on non-host species
Autorzy:
Ranathunge, N.P.
Sandani, H.B.P.
Powiązania:
https://bibliotekanauki.pl/articles/65702.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
deceptive behaviour
Colletotrichum truncatum
strategic survival
asymptomatic endophyte
asymptomatic survival
non-host species
pathogenicity
Opis:
Colletotrichum truncatum (syn. C. capsici), like many other members of the genus Colletotrichum, displays a highly developed infection mechanism against a number of agriculturally important crops. Among many survival strategies, C. truncatum is well known for its wide host range and high pathogenicity on several major crop species. Meticulous understanding of a pathogen’s infection mechanisms is the best way to achieve successful management of a disease. This study was carried out to evaluate the pathogenicity of C. truncatum on selected crop plants and weed species and to detect the possibility of non-host species to facilitate survival of the pathogen. Inoculation of an isolate of C. truncatum to four crops: curry chilli – Capsicum annuum (var. CA8), eggplant – Solanum melongena (var. Lena Iri), tomato – Solanum lycopersicum (var. Thilina) and green chilli – C. annuum (var. KA2) and three weed species: little ironweed (Vernonia cinerea), billygoat-weed (Ageratum conyzoides) and Bengal dayflower (Commelina benghalensis) resulted in approximately 3.5 disease severity (DS) (100% disease incidence-DI) on S. lycopersicum and C. annuum (var. KA2), followed by 2.8 and 1.8 DS (100%, 75% DI) on C. annuum (var. CA8) and S. melongena (var. Lena Iri), respectively. The three weed species were completely symptomless up to 8 weeks after the inoculation (WAI). However, microscopic studies and serial culturing of the inoculated tissues revealed the presence of the fungus in all the tested plants. Appressoria were present in all treated leaves and eventually broke their dormancy upon leaf senescence nearly 6 WAI. This study reveals the potential of C. truncatum infecting all tested crops and the capability of the three weed species in harboring the pathogen asymptomatically for several weeks. Thus, early management of inoculum in the field is suggested for C. truncatum diseases.
Źródło:
Journal of Plant Protection Research; 2016, 56, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental factors affecting the survival of soil dwelling Legionella longbeachae in water
Autorzy:
Potočnjak, Mia
Magdalenić, Zlatko
Dijan, Marija
Rebić, Danica
Gobin, Ivana
Powiązania:
https://bibliotekanauki.pl/articles/990884.pdf
Data publikacji:
2016
Wydawca:
Instytut Medycyny Wsi
Tematy:
legionella
survival
stagnant tap water
temperature
Opis:
Introduction. Legionella longbeachae, a causative agent of Legionnaire’s disease, has often been associated with potting soil and gardening, a feature quite distinct from other Legionella species. The precise transmission mechanism is still unknown, although due to the ecological coherence of the soil and water there is a potential risk of infection by contaminated stagnant water in the garden. Objective. The aim of the study was to explore the ability of L. longbeachae to survive in stagnant tap water usually used for watering in gardens. The influence of different factors (temperature, pH and NaCl concentration) on L. longbeachae survival in stagnant tap water was also tested. Results. The result showed that L. longbeachae is viable in stagnant tap water over 100 days at 4 °C and 25 °C. The survival of L. longbeachae exposed to different pH and NaCl concentration suggests resistance to low pH values (pH2 and pH5) and all tested NaCl concentrations at temperatures lower than 25 °C. The ability of L. longbeachae to persist in stagnant tap water should be taken seriously in the risk assessments as a possible hidden reservoir of infection.
Źródło:
Annals of Agricultural and Environmental Medicine; 2016, 23, 3
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cancer of the gallbladder – own experience
Autorzy:
Gryko, M.
Dawidziuk, T.
Sawicka, E.
Cepowicz, D.
Kamocki, Zb.
Masiulaniec, P.
Kędra, B.
Powiązania:
https://bibliotekanauki.pl/articles/1916507.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
gallbladder cancer
survival
surgery
gallstones
cholecystectomy
Opis:
Gallbladder cancer is a relatively rare cancer of the gastrointestinal tract, most commonly detected (approximately 95% of cases) in the most advanced clinical stage IV and burdened with high mortality rate. This is mainly due to the nonspecific symptoms in the early stages of the disease. The remaining cases of gallbladder cancer are usually detected after surgery due to gallstone disease. Gallstones, their size and pancreatic juice reflux into the gallbladder are risk factors in the development of gallbladder cancer. In this paper the authors carried out a retrospective research based on an evaluation of a group of 38 patients treated surgically due to the gallbladder cancer in the years 2005-2012 in the Second Department of General and Gastroenterological Surgery in Białystok Medical University Hospital. In this group there were 29 women and 9 men, in age between 48-86 years. Although women suffered from gallbladder cancer more often than men, their survival rate was significantly better after the surgery. The research showed some benefits of extended surgical procedures even in patients with advanced stages of the disease, while the effectiveness of surgical treatment depends mainly on the possibility of radical resection of the primary lesion and, eventually, the resection of lymph nodes and other infiltrated tissues.
Źródło:
Progress in Health Sciences; 2014, 4, 1; 153-157
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In vitro regeneration of Vitellaria paradoxa from shoot tip explants
Autorzy:
Afful, N.T.
Abdulai, I.
Azu, E.
Elegba, W.
Annor, W.
Akama, C.
Asare, K.
Dentey, J.
Amoatey, H.M.
Powiązania:
https://bibliotekanauki.pl/articles/2096257.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Vitellaria paradoxa
shea
shoot
root
survival
Opis:
Shea tree (Vitellaria paradoxa) is an essential tree crop with great potential economic value mainly because of its seed oil (shea butter) which is of high demand for manufacturing assorted products in food, cosmetic, and rubber industries. Propagation of this species is, however, hindered by relative unavailability of seed (nuts), erratic seed germination, a long vegetative phase, and latex exudation from cuttings. Thus, another method of propagation through in vitro culture is recommended for rapid multiplication of shea genotypes for large-scale cultivation. In the present study, the effects of two cytokinins, namely, 6-benzylaminopurine (BAP) and kinetin (KIN), and one auxin, namely 1-naphthaleneacetic acid (NAA), on shoot and/or root induction in vitro were assessed at various combinations/concentrations. The inclusion of these growth regulators in the culture medium significantly improved (P < 0.05) shoot/root regeneration over the controls. The highest shoot regeneration percentage (100%) was obtained on Murashige and Skoog (MS) basal medium supplemented with 2 mg * dm^-3 KIN + 0.5 mg * dm^-3 NAA or 1.5 mg * dm^-3 KIN within 7/8 days of inoculation. This medium (2 mg * dm^-3 KIN + 0.5 mg * dm^-3 NAA) showed the highest mean shoot length of 3.24 cm. Compared to KIN, BAP was more effective in inducing vigorous shoot growth. However, rooting was induced only on MS medium modified with 1 mg * dm^-3 BAP + 0.5 mg * dm^-3 NAA. These findings can serve as baseline information for in vitro, commercial scale propagation of shea tree.
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2022, 103, 1; 71-79
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Motyw „yūrei” w japońskich survival horrorach — analiza wybranych przykładów
The motif of “yūrei” in Japanese survival horrors – the analysis of selected case studies
Autorzy:
Staszenko, Dominika
Powiązania:
https://bibliotekanauki.pl/articles/973185.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
survival horror
Japanese mythology
remediation
interface
Opis:
This paper examines the phenomenon of survival horror games. It focuses on “yūrei”, a Japanese mythological supernatural being. “Yūrei” returns to the world of the living to take revenge on the people who harmed them in the past. The paper also concentrates on the remediation of “yūrei” iconography from literature and Japanese ghost movies into games. It analyses the characteristics of the survival horror genre, dividing them into the ludic and semantic systems. It also describes the relationships between traditional Japanese legends and modern texts, and presents an important issue of the main character (usually schematic and doomed to failure). Observations are based mainly on two games: “Calling” for Nintendo Wii and “Kuon” for PlayStation 2.
Źródło:
Replay. The Polish Journal of Game Studies; 2014, 01
2391-8551
2449-8394
Pojawia się w:
Replay. The Polish Journal of Game Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal Control in a Model of Chemotherapy-induced Radiosensilisation
Optymalne sterowanie w modelu radiochemioterapii uwzględniającym uwrażliwienie
Autorzy:
Bajger, Piotr
Fujarewicz, Krzysztof
Świerniak, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/953411.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
radiochemotherapy
optimal control
survival curves
radiosensilisation
Opis:
  In this work, we consider a simple mathematical model of radiochemotherapy which includes a term responsible for radiosensitization. We focus on finding theoretically optimal controls which maximise tumour cure probability for a finite, fixed therapeutic horizon. We prove that the optimal controls for both therapies are of 0-bang type, a result which is not altered by the inclusion of the radiosensilization term. By means of numerical simulations, we show that optimal control offers a moderate increase in survival time over a sequential treatment. We then revisit in more detail a question of measuring the synergy between the therapies by means of isobolograms, a common experimental technique for measuring the additivity of two treatments.
Źródło:
Mathematica Applicanda; 2019, 47, 1
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical complications of acute myocardial infarction considering risk factors, treatment and survival of patients in 10-year clinical observation
Mechaniczne powikłania ostrego zawału serca z uwzględnieniem czynników ryzyka, leczenia i przeżywalności chorych w 10-letniej obserwacji klinicznej
Autorzy:
Dąbek, Józefa
Skorus, Paweł R.
Potyka, Katarzyna
Potyka, Marek
Stachoń, Krystian
Gąsior, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/1035255.pdf
Data publikacji:
2019
Wydawca:
Śląski Uniwersytet Medyczny w Katowicach
Tematy:
mechanical complications
myocardial infarction
survival
treatment
Opis:
INTRODUCTION: Cardiovascular diseases, including coronary disease and its complications, are the most common cause of death. Myocardial infarction is usually caused by a blood clot cosing the lumen of a coronary artery at the site of an unstable atherosclerotic plaque. MATERIAL AND METHODS: All the analyzed patients with mechanical complications of acute myocardial infarction (AMI) were hospitalized at the 2nd Department of Cardiology and Department of Anaesthesiology and Intensive Care of the Upper-Silesian Medical Centre in Katowice in 2006–2016 and the database was based on the medical records of the patients. The study group comprised 52 (100%) patients. There were 23 (44.2%) women and 29 (55.8%) men, aged 54 to 84 years with a mean age of 69.8 years. RESULTS: Ventricular septal rupture (n = 36; 69.2%) was the most frequently observed complication but papillary muscle rupture (n = 4; 7.7%) and tendinous chord rupture (n = 4; 7.7%) were the least frequent. Hypertension and hypercholesterolemia were the most common risk factors for coronary heart disease in the study group. An increased mortality rate was observed in patients who received pharmacological treatment compared to surgically treated patients (87.5% vs. 61.4%). The majority of patients had one risk factor for coronary heart disease (28; 53.8%). CONCLUSIONS: 1. In the study group, ventricular septal rupture and the cardiac free wall rupture were the most frequently observed mechanical complications of AMI. 2. Patients with AMI had numerous risk factors for coronary heart disease, of which hypertension and hypercholesterolemia were the most common. 3. Patients with mechanical complications of AMI had both higher mortality rates than survival and they were higher in the pharmacologically treated group.
WSTĘP: Choroby układu krążenia, w tym choroba wieńcowa i jej powikłania, stanowią najczęstszą przyczynę zgonów. Zawał mięśnia sercowego spowodowany jest zwykle pęknięciem blaszki miażdżycowej i zamknięciem tętnicy wieńcowej skrzepliną. MATERIAŁ I METODY: Badaniem objęto 52 chorych (100%) z mechanicznymi powikłaniami ostrego zawału serca, hospitalizowanych w II Oddziale Kardiologii oraz Oddziale Anestezjologii i Intensywnej Terapii Górnośląskiego Centrum Medycznego w Katowicach w latach 2006–2016, wtym 23 kobiety (44,2%) i 29 mężczyzn (55,8%) w wieku 54‒84 lat (średnia wieku 69,8 roku). WYNIKI: Najczęstszym powikłaniem było pęknięcie przegrody międzykomorowej (n = 36; 69,2%), natomiast do najrzadszych należały pęknięcie mięśnia brodawkowatego (n = 4; 7,7%) i pęknięcie ścięgien (n = 4; 7,7%). Nadciśnienie i hipercholesterolemia były najczęstszymi czynnikami ryzyka wystąpienia choroby niedokrwiennej serca w badanej grupie. Zwiększoną śmiertelność zaobserwowano u pacjentów leczonych farmakologicznie (87,5%), podczas gdy śmiertelność pacjentów leczonych operacyjnie wynosiła 61,4%. U większości pacjentów występował jeden czynnik ryzyka choroby wieńcowej (n = 28; 53,8%). WNIOSKI: 1. Najczęstszymi powikłaniami były pęknięcie przegrody międzykomorowej i pęknięcie ściany serca. 2. U pacjentów występowało wiele czynników ryzyka dla choroby niedokrwiennej serca, spośród których najczęstszymi były nadciśnienie i hipercholesterolemia. 3. Śmiertelność w badanej grupie chorych z mechanicznymi powikłaniami ostrego zawału serca znacznie przewyższała przeżywalność i była większa w grupie leczonych zachowawczo.
Źródło:
Annales Academiae Medicae Silesiensis; 2019, 73; 119-129
1734-025X
Pojawia się w:
Annales Academiae Medicae Silesiensis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extensions of cox model for non-proportional hazards purpose
Autorzy:
Borucka, Jadwiga
Powiązania:
https://bibliotekanauki.pl/articles/425219.pdf
Data publikacji:
2014
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
Cox model
survival analysis
non-proportional hazards
Opis:
Cox proportional hazard model is one of the most common methods used in time to event analysis. The idea of the model is to define a hazard level as a dependent variable which is explained by the time-related component (so-called baseline hazard) and the covariates- related component. The model is based on several restrictive assumptions one of which is the assumption of proportional hazard. However, if this assumption is violated, this does not necessarily prevent an analyst from using Cox model. The current paper presents two ways of model modification in the case of non-proportional hazards: introducing interactions of selected covariates with function of time and stratification model. Calculations performed give the evidence that both methods result in better model fit as compared with the original model. Additionally, they allow interpreting the parameters estimates more precisely, taking into account the effect of the covariate at the hazard level that is changing over time. The choice of the appropriate method of tied events handling however is not straightforward and should be adjusted to the particular analysis purpose.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2014, 3(45); 85-101
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mistrzowie drugiego planu. Motyw zombie w perspektywie literackiego sztafażu – od survival horroru przez dystopię do romansu paranormalnego
Autorzy:
Ksenia, Olkusz,
Powiązania:
https://bibliotekanauki.pl/articles/897588.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
zombie
horror
survival horror
fantastyka
literatura popularna
Opis:
Contemporary pop culture dynamics encourages artists to reconfigure, for instance, a plethora of character patterns. A fine example of such tendency is the trope of zombie associated by the mass imagination with a spiritless horde chasing after living survivors – and the genre meant to support such a narrative is, par excellence, a horror. The presence of zombies in horror does not, however, limit the creativity of authors who, while reinterpreting this trope, are wont to assign zombies a pivotal or tangential role in dystopian, pastiche, or paranormal narratives. The article gathers and sums up all similar tendencies in literature, placing a special emphasis on narrative experiments and recalling a multitude of examples.
Źródło:
Przegląd Humanistyczny; 2015, 59(3 (450)); 77-87
0033-2194
Pojawia się w:
Przegląd Humanistyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
“My Monster Self”: Violence and Survival in Margaret Atwood’s Moral Disorder
Autorzy:
Fakhrshafaie, Nahid
Bahremand, Alireza
Powiązania:
https://bibliotekanauki.pl/articles/2032712.pdf
Data publikacji:
2021-11-22
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
caregiving
outsider
insider
garrison mentality
gaze
survival
Opis:
Margaret Atwood’s novels are usually celebrated for their blunt feminism. However, in Moral Disorder—a series of interconnected stories that forms a novel—feminist concerns are replaced with worries about territory and survival. The protagonist is an insider whose sole concern is to survive and to protect her territory. The confrontation between the narrator as the insider and the outsiders does not occur directly but could be inferred by her cruelty toward other characters and her violence against the animals under her care. The present study argues that this cruelty, which abounds in the novel, could be viewed as a substitute for violence against the outsiders. The narrator’s gaze at the Indian boy who entered the protagonist’s territory manifests a garrison mentality. The frequent references to axes in the novel are compared to the use of axes in “Wilderness Tips,” a short story by Atwood in which axes also have a metaphoric significance. The beheading and dismemberment of domestic animals could be the punishment awaiting the intruder. The novel establishes a division between the insider/outsider, here/there, self/other and civilized/barbaric to call for action and awareness about the importance of protecting one’s territory.
Źródło:
Text Matters: A Journal of Literature, Theory and Culture; 2021, 11; 263-278
2083-2931
2084-574X
Pojawia się w:
Text Matters: A Journal of Literature, Theory and Culture
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scots pine Pinus sylvestris mortality after surface fire in oligotrophic pine forest Peucedano-Pinetum in Kampinos National Park
Autorzy:
Tyburski, Łukasz
Zaniewski, Piotr T.
Bolibok, Leszek
Piątkowski, Mateusz
Szczepkowski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2044173.pdf
Data publikacji:
2019
Wydawca:
Instytut Badawczy Leśnictwa
Tematy:
burn
Kampinos National Park
Scots pine
survival
Opis:
Pines are generally fire-resistant trees. There is a shortage of research on the behaviour of Scots pine after surface fire in older stands. The aim of the work was to describe the effect of the surface fire intensity on the mortality of pines of various diameter at breast height (DBH), including older trees. The research was conducted in Peucedano-Pinetum oligotrophic Scots-pine forest in Kampinos National Park (KPN, central Poland) on the area of two adjacent surface fire sites originated in spring 2015 in 60- to 200-year-old stands (site area: 10,92 ha). There were 45 (28 burned and 17 control) permanent plots established after the fire. The share of not burned, superficially burned and completely burnout organic horizon of the soil was determined within all of them. DBH and location of pine trees were measured within all of the plots on the area of 200 m2. For all of the trees for which full information about soil organic horizon damage was mapped, the prevailing type of disturbance in their close neighbourhoods with radii of 1 and 2 m was assessed. The mortality of trees was assessed after each vegetation period up to 2017, basing on the presence of green needles on the trees. The influence of fire intensity on the survival of trees was examined on whole permanent plot level as well as on individual tree level. Strong linear correlation was observed between Scots pine mortality and the share of plots area with damaged organic layer, especially at the end of the third vegetation period after fire. Logistic regression models constructed for individual trees suggest that bigger tree diameter (hence, thicker bark) diminished the odds of mortality only after two vegetation periods from the fire. After the third vegetation period, only the intensity of surface fire in the close neighbourhood of trees influenced (negatively) the chance on survival. The size of trees did no matter in this case. Nearly all of the trees that were located within burnout organic matter areas died. The results did not support the commonly known mechanism of enhancement of bigger Scots pine tree survival after surface fire because of thicker bark responsible for heat protection. Probably, the main cause of observed mortality was not overheating of cambium but it was rather connected to massive fine root loses. Scots pines growing on oligotrophic arid sites modify their root system to explore topsoil layers with higher proportion of shallow roots, growing even in organic litter layer. This corresponds with massive (regardless of size) pine mortality within sites characterised by complete burnout of organic matter layer and very high survival in those ones with only surfacely burned litter layer. The results can improve the assessment of surface fires consequences in managed Scots pine stands growing in oligotrophic conditions.
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2019, 61, 1; 51-57
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Incidence, morbidity and 5-year survival of colorectal cancer patients in the Kujawsko-Pomorskie voivodship in 2005-2011, based on data from the National Health Fund
Autorzy:
Nowicki, Andrzej
Dahms, Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/1392418.pdf
Data publikacji:
2018
Wydawca:
Index Copernicus International
Tematy:
colorectal cancer
incidence
morbidity
5-year survival
Opis:
Introduction: Incidence, morbidity and 5-year survival rates illustrate the epidemiological situation of colorectal cancer and assess effectiveness of the treatment. In Poland, the National Health Fund is the payer of services. The data related to morbidity, incidence, and 5-year survival may be supplementary to the epidemiological data of the National Cancer Registry. Objective: Analysis of services granted by NHF in Bydgoszcz to persons with diagnosed colorectal cancer in 2006–2011 including the assessment of incidence, morbidity and 5-year survival of the population in the Kujawsko-Pomorskie province. Material and methods: The study analyzed the services recorded in the database of the National Health Fund in Bydgoszcz in 2006-2011 given to patients with colorectal cancer. The Kaplan-Meier method and the gambling rate were used to determine the probability of survival. Results: In 2006–2011, men were offered 10.1% more services than women. The most frequent services regarded colorectal cancer (48.9%), rectal cancer (43.8%) and esophageal cancer (7.2%). In total, 50410 services were provided. Despite increase in the number of women in the population, 388 more men died than women. The probability of survival was 46.8 % and 42.6% for men and women, respectively, furthermore 41.8%, 44.2% and 48.9% for colon cancer and esophageal and rectal folds cancer, respectively. Conclusions: In the Kujawsko-Pomorskie province during the period of 2006–2011, the number of diagnosed colorectal cancers increased as did the overall number of services provided. There was also a downward trend for the total number of services granted in relation to the increase in the number of new diagnosed cases. Incidence and morbidity rates were variable, gradually increasing in subsequent years and amounted to 59/100000 and 67/100000, 355/100000 and 408/100000 in 2010 and 2011, respectively. The probability of 5-year survival was 45.2%. Diagnosis of a disease in patients above 69 years of age increased the likelihood of death.
Źródło:
Polish Journal of Surgery; 2018, 90, 4; 1-8
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of models of survival analysis in the assessment of the situation of macrosectors of listed companies
Autorzy:
Bieszk-Stolorz, Beata
Markowicz, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/2127981.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet w Białymstoku. Wydawnictwo Uniwersytetu w Białymstoku
Tematy:
survival analysis
listed companies
bear market
macrosectors
Opis:
Goal – The goal of the article is the assessment of the possibilities of recovery after decrease of prices of shares of companies listed on the Warsaw Stock Exchange in the years 2008-2009 and 2011-2013 in particular macrosectors: industrials, financials and services. The probability and intensity of increase and decrease of prices were analysed. Research methodology – Selected methods of survival analysis were applied. The Kaplan-Meier estimator was used in the analysis of the probability of increase and decrease of prices of shares in the macrosectors. The intensity of decrease and increase of prices was assessed by means of the empirical hazard model and the proportional Cox model. Threshold values of the increase and decrease of prices were calculated on the basis of changes of the WIG index in analysed periods. Comparative analysis of these two periods was also conducted. Score – The hypothesis about a similar situation of macrosectors during the financial crisis and in the bear market was confirmed. In case of the financials macrosector, its reaction to the market situation was the strongest in both the decrease and increase of share prices. The companies of the industrials macrosector were in better situation than the financial companies. The service companies reacted weakly on the market changes. Originality /value – The application of the survival analysis methods in the study of the capital market.
Źródło:
Optimum. Economic Studies; 2018, 1(91); 3-15
1506-7637
Pojawia się w:
Optimum. Economic Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Survival and Safety Requirements in European Union for Recreational Craft Inspections. A Spanish Case Study
Autorzy:
Torralbo, J.
Castells, M.
Powiązania:
https://bibliotekanauki.pl/articles/116415.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Spanish Case Study
Recreational Craft, European Legislation
Survival and Safety Requirements
Surveillance Safety Requirements
Survival Requirements
Craft Inspections
Opis:
Statistical data shows that a large number of maritime accidents are related to recreational craft. For instance, in Spain, more than fifty percent of the emergencies are related to pleasure boats at sea. Recreational craft marketed in the EU must comply with harmonized technical safety and environmental requirements defined by Directive 94/25/EC, as amended in 2003. On 28 December 2013, the new recreational craft directive 2013/53/EU was published in the Official Journal of the European Union. EU Member States have until 18 January 2016 to amend their national legislation and transpose the new directive. The current directive 94/25/EC as amended by directive 2003/44/EC will be repealed on 18 January 2016, after the full application of the new text. Although this directive, there is not a clear coordination and equivalence among the EU countries according to the survival and safety equipment compulsory for recreational crafts. The main purpose of this paper is to analyze and compare the types of survey / inspections to be carried in pleasure craft (non-commercial use), periodicity and required safety equipment in some member states of the European Union. A case study of Spain is presented. From the results obtained, we can make clear that in the European Union there is a lack of coordination in this area and indicate the need to unify a common pattern in inspections and survival and safety requirements of recreational boats in the EU.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 1; 103-111
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in survival of colorectal cancer patients in Swietokrzyskie Province (Southern Poland) from the second half of the 1990s to the early 21st century - a population-based study
Autorzy:
Macek, P.
Biskup, M.
Ciepiela, P.
Terek-Derszniak, M.
Sosnowska-Pasiarska, B.
Król, H.
Smok-Kalwat, J.
Góźdź, S.
Powiązania:
https://bibliotekanauki.pl/articles/2085547.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Tematy:
colorectal cancer
relative survival
population-based registries
Opis:
Introduction and objectives. For years, the increase in cancer incidence and deaths has constituted a significant health and social problem. Variation in the burden in cancers in different regions of the world requires constant monitoring of the epidemiological situation in this regard. Assessing survival in cancer patients is a valuable source of information for patients and physicians alike, as well as for politicians who have a direct impact on the shaping of health policy and health systems. The aim of the present study was to assess the changes in the 5-year relative survival of colorectal cancer patients during 1995–2014. Materials and method. The data of 8,970 patients with colorectal cancer in the years 1995–2014, 5,033 males and 3,937 females aged 67.5 ± 11.7 from Świętokrzyskie Cancer Registry were used. Cases were classified according to the topographical codes ICD-O-3: C18.0-C18.9, C19.9, C20.9, C21.0-C21.2, C21.8. The end of follow-up was fixed at 31 December 2014. Four five-year calendar periods were defined. In each calendar period, relative survival rates using the Ederer II method were estimated separately for males and females. Results. In 2010–2014 (against 1995–1999), the absolute increase in the 5-year relative survival in males and females with colon cancer was the highest and reached 9.8 percentage point (p.p.) and 9.6 p.p., respectively. Patterns of survival for both colon and rectal cancer patients according to gender and age were very similar. Conclusions. In 1995–2014, an increase in the value of relative survival rates of males and females with colorectal cancer was observed. Systematic increase in funding in health care was a chance for reducing the burden of colorectal cancer by more widespread and equal access of effective early detection and cancer treatment.
Źródło:
Annals of Agricultural and Environmental Medicine; 2020, 27, 2; 301-305
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Knowledge, perception and child care practices among adolescent mothers in Ibadan Metropolis, Nigeria
Autorzy:
Oyewole, Oyediran Emmanuel
Todowede, Christiana Mautin
Dipeolu, Isaac Oluwafemi
Powiązania:
https://bibliotekanauki.pl/articles/2038270.pdf
Data publikacji:
2020-09-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
adolescent mothers
child survival strategies
childcare practices
Opis:
Introduction. There is little information regarding childcare practices among adolescent mothers in the study areas. Aim. This study was aimed at investigating knowledge, perception and childcare practices among adolescent mothers. Material and methods. A descriptive cross-sectional survey was conducted on randomly select 382 adolescent mothers. A validated semi-structured questionnaire was used to collect data, which were analysed using, descriptive and multivariate analyses with p-value set at 0.05. Age of respondents was 18.5±0.7 years. Results. Majority (80.6%) had poor knowledge of when to start ante-natal care. Also, 70.0% of the respondents could not perceive growth monitoring as a necessary strategy for child survival and 86.4% perceived diarrhoea as normal for children during the teething period. Many (58.4%) did not practise exclusive breastfeeding. Respondents with secondary education were less likely to have poor knowledge than those with primary education (OR: 0.2, CI: 0.6-0.9, 95%). Respondents, who received supervision from older women during childcare, were less likely to have poor childcare practice than those who did not (OR: 0.2, CI: 0.4-0.7, 95%). Conclusion. Respondents had poor knowledge of childcare practices when childcare survival strategies were used as the yardstick for evaluation. Involvement of older women is suggested to assist adolescent mothers improve their knowledge and practices of childcare.
Źródło:
European Journal of Clinical and Experimental Medicine; 2020, 3; 176-184
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The growth of seven Abies grandis provenances in the climatic conditions of the Polish Carpathian Mountains
Autorzy:
Wilczynski, S.
Kulej, M.
Powiązania:
https://bibliotekanauki.pl/articles/2077766.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
grand fir
dendrochronology
dendroclimatology
survival
growth parameters
Opis:
The introduction of foreign tree species to new areas facilitates an increase in species biodiversity and possibilities for growth of tree stands. Many years of research related to survival rate, basic growth features and evaluation of a sensitivity to climatic conditions of a new habitat is necessary to achieve a successful introduction. The paper presents the results of the research on the adaptation of grand fir to the climatic conditions in the provenance trial located in the lower montane forest belt. The dendroclimatic research has concerned the offsprings of 7 grand fir provenances originated from North America. A total of 24 trees from each provenance were selected and two cores from each tree were taken. Principal component analysis of tree-ring widths was used to classify the provenances. The climate elements described by PC1 and PC2 were identified on the basis of bootstrap correlation function. Survival rate, height and diameter at breast height of trees were also analysed. The features of the studied provenances showed significant differences. The variation of the inter-provenance survival rate and the increase in tree height of particular provenances were determined principally by the genotype. Grand firs trees from Region I exhibited superior survival rates and better dynamic increases in tree height. The variability of these two features had the character of clinal variation because they primarily depended on the elevation and the latitude of the maternal tree stands. Two groups of provenances which were connected with the regions of their natural distribution were characterized on the basis of the features of the short-term rhythm of the radial increments. The provenances of two specific groups revealed different sensitivity to temperature, rainfall, humidity and sunshine. The greatest effect on the variation of radial increments had been produced by the moisture and pluvial factors whilst the solar factor had produced the least effect on it. The air temperature made also a relatively high contribution to their radial increments. Grand fir trees from the Salmon River provenance in British Columbia provided the best trees from the cultivation point of view. The provenances from Vancouver Island and the western slope of the Cascadian Mountains in Washington State have been regarded as the best for introducing and acclimatising to the conditions of the Carpathian Mts.
Źródło:
Dendrobiology; 2019, 81; 1-13
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modele predykcji upadłości MŚP w Polsce – analiza z wykorzystaniem modelu przeżycia Coxa i modelu regresji logistycznej
Prediction models of SME bankruptcy in Poland – analysis using Cox survival model and logistic regression model
Autorzy:
Ptak-Chmielewska, Aneta
Powiązania:
https://bibliotekanauki.pl/articles/424998.pdf
Data publikacji:
2014
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
survival analysis
macrovariables
Cox model
bankruptcy risk
Opis:
Modele predykcji upadłości MŚP w Polsce – analiza z wykorzystaniem modelu przeżycia Coxa i modelu regresji logistycznej
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2014, 4(46); 9-21
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the risk of liquidation depending on the age of the company: a study of entities established in Szczecin in period 1990--2010
Autorzy:
Markowicz, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/425000.pdf
Data publikacji:
2019
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
survival analysis
firms’ duration
risk of liquidation
Opis:
The aim of the research was an assessment of the relative risk of liquidation of a company depending on its age. The research covered economic entities established in Szczecin in the period 1990-2010. The analysis was carried out with the use of a logit model. The risk of company liquidation was examined depending on the entity’s age expressed both in months (continuous variable) and in grouped intervals (year, half-year). In this way, attention was drawn to the benefits of continuous variable coding (rank and 0-1 coding). The research covered companies established during 1990-2010 in total (over 120 thousand) and in time periods resulting from the cyclical character of liquidation of companies (in accordance with the earlier research findings). The research showed that the risk of company liquidation decreases as the company grows older (the use of a continuous variable and a rank variable). On the other hand, the risk of subsequent age groups (using the 0-1 variable) prevents the risk from being monotonous.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2019, 23, 2; 49-62
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dioscin improves survival in murine endotoxemia induced by Lipopolysaccharide
Autorzy:
Bing, Han
Jing, Lu
Meitong, Liu
Zhe, Feng
shuang, Guan
Powiązania:
https://bibliotekanauki.pl/articles/895519.pdf
Data publikacji:
2018-12-31
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
cytokines
survival
Endotoxemia
Dioscin
NF- қB
Opis:
Dioscin is a natural steroidal saponin mainly exacted from Dioscoreae Rhizoma, which usually used as traditional medicine in east asia area. Dioscin has various pharmacological actions. However, little is known concerning the role on Lipopolysaccharide (LPS)-induced endotoxemia. The aim of the present study was to investigate the effects and possible mechanisms of dioscin against LPS-induced endotoxemia in mice. The data showed dioscin significantly increased mouse survival when mice were treated with dioscin prior to or after LPS challenge and significantly attenuated TNF-α, IL-1β and IL-6 production in serum. Further studies revealed that dioscin could downregulate LPS-induced nuclear transcription factor - қB (NF-қB) signal transduction pathways. These observations indicated that dioscin modulated early cytokine responses by blocking NF-қB activation, and thus, increased mouse survival in murine endotoxemia induced by LPS.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 6; 1347-1352
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alternative approach to moments of order statistics from one-parameter Weibull distribution
Autorzy:
Rai, Piyush Kant
Sirohi, Anu
Powiązania:
https://bibliotekanauki.pl/articles/1358308.pdf
Data publikacji:
2020-03-23
Wydawca:
Główny Urząd Statystyczny
Tematy:
order statistics
survival function
moments
characteristic function
Opis:
The Weibull distribution is used to describe various observed failures of phenomena and widely used in survival analysis and reliability theory. Sometimes it is very difficult to compute moments of such distributions due to various reasons for e.g. analytical issues, multi parameter cases etc. This study presents the computation of the moments and the expected value of the product of order statistics in the sample from the one-parameter Weibull distribution. An alternative approach in connection to survival function is used to obtain these moments and expected values. In addition the characteristic function of the above distribution is also obtained in the form of gamma functions. Further an illustration is shown to find the first two moments and expected value of the product of order statistics by using this approach.
Źródło:
Statistics in Transition new series; 2020, 21, 1; 169-176
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Survival analysis: a case study of micro and small enterprises in Dolnośląskie and Opolskie Voivodship (Poland)
Autorzy:
ŁOBOS, Krzysztof
SZEWCZYK, Mirosława
Powiązania:
https://bibliotekanauki.pl/articles/529831.pdf
Data publikacji:
2013
Wydawca:
Wyższa Szkoła Bankowa we Wrocławiu
Tematy:
micro and small enterprises
Polska
survival analysis
Opis:
The aim of the study is to achieve initial recognition of the factors that determine the survival rate of Polish micro and small enterprises. The research, conducted in June 2011 and covering a sample of 147 entities, constitutes a pilot study. We explore the determinants of companies’ survival and test whether firms with different characteristics exhibit different performances in terms of the duration of survival. The results indicate substantial differences in the survival rates. The factors taken into account in this study, which to the greatest extent possible differentiates the whole sample in view of survival, are: running the business with employees or alone and specialist vs. popular activity as regards the required competences. Larger firms (with employees) are significantly less likely to close than smaller firms. Firms in highly competitive markets are more prone to closure.
Źródło:
Central and Eastern European Journal of Management and Economics (CEEJME); 2013, 1, 2; 123-140
2353-9119
Pojawia się w:
Central and Eastern European Journal of Management and Economics (CEEJME)
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Psucie mechanizmów homeostazy w systemach przyrody I społeczeństwa
Spoiling of homeostasis mechanisms in natural and social systems
Autorzy:
Sztumski, Wiesław
Powiązania:
https://bibliotekanauki.pl/articles/530938.pdf
Data publikacji:
2020-02-10
Wydawca:
Państwowa Wyższa Szkoła Zawodowa w Raciborzu
Tematy:
homeostasis
sustainable development
stabilization
technical progress
survival
Opis:
The author draws attention to the low-profile phenomenon of disassembly of equilibrium mechanisms. Although it has accompanied the progress of civilization since the beginning of humanity and intensified in the Anthropocene era, it has become particularly visible and dangerous since the mid-twentieth century. More and more people tinker with homeostasis of nature and social systems with the help of increasingly better tools and technologies and spoil it in proportion to its possibilities and rapidly growing consumer needs. They do it unnecessarily on such a large scale, foolishly and irresponsibly. They do not care that future generations are increasingly reducing their chances of survival. In individual parts of the article, homeostasis is discussed and its importance for the existence and development of natural and social systems, and the dismantling of homeostasis mechanisms in the geobiosphere, sociosphere and economy. In conclusion, the author shows the dilemma faced today by humanity: whether to follow the path delineated by the calculating reason controlled by the ideology of consumerism and uncontrollable economic growth, and further weaken homeostasis, which threatens with extermination, or try to stop it for the benefit of future generations and for prolonging life humanity. The decision must be made by the present and next generation, because in a dozen or so years it may be too late.
Źródło:
Eunomia – Rozwój Zrównoważony – Sustainable Development; 2019, 2(97); 125-134
1897-2349
2657-5760
Pojawia się w:
Eunomia – Rozwój Zrównoważony – Sustainable Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intercultural Dialogue as a way out of the present crisis.
Autorzy:
Ferrarotti, Franco
Powiązania:
https://bibliotekanauki.pl/articles/2232450.pdf
Data publikacji:
2023-07-17
Wydawca:
Academicus. International Scientific Journal publishing house
Tematy:
technique
mass anxiety
intercultural dialogue
tradition
survival
Opis:
We live in a technical age. That is to say, modern societies have adopted technological innovation as a guide-principle. But technique is a perfection without an aim. It can only control its internal operations. It is the eternal return of the identical. Hence, a general feeling of social disorientation and anxiety. Moreover, in a nuclear age such as ours, there is no guarantee of survival for mankind. From a diachronic historical process, we are in a synchronic one. All cultures are to be considered at the same level. The only way out is dialogue, intercultural relations, based on a concept of «cultural co-tradition».
Źródło:
Academicus International Scientific Journal; 2023, 14, 28; 9-28
2079-3715
2309-1088
Pojawia się w:
Academicus International Scientific Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CORPORATE BANKRUPTCY AND SURVIVAL ON THE MARKET: LESSONS FROM EVOLUTIONARY ECONOMICS
Autorzy:
Boratyńska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/488966.pdf
Data publikacji:
2016
Wydawca:
Instytut Badań Gospodarczych
Tematy:
corporate bankruptcy and survival
creative destruction
evolutionary economics
Opis:
The following paper is a theoretical and empirical study. The terminological differences between bankruptcy and insolvency have been indicated and compared in the article. Most frequently considered aspects of bankruptcy appear in definitions. The first of them emphasizes the economic character of bankruptcy. Insolvency is a culmination of a lack of financial means and the loss of solvency, which does not have a fading tendency, but develops into a permanent phenomenon. In legal terms, insolvency is an institution, whose purpose is to stop the accumulation of debts and most frequently it consists on the liquidation of the debtor's estate. The main purpose of the study is a critical review of the scientific achievements of the representatives of evolutionary economics within the scope and mechanism of bankruptcy and the survival of enterprises. The analyzed case of the Beta company, which went bankrupt, indicates that the companies which are not able to undertake proper adjustments to competitive conditions of the market at the right moment are eliminated from it. The theoretical law “the survival of the fittest” finds then its reflection in practice. The following research methods were used in the article: a descriptive analysis and the trajectories of J. Argenti in terms of models. Detailed examinations of files of insolvency proceedings of the Beta company have been carried out.
Źródło:
Oeconomia Copernicana; 2016, 7, 1; 107-129
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Past and Present in Jorge Semprun’s "L’écriture ou la vie"
Autorzy:
Ferri, Giulia
Powiązania:
https://bibliotekanauki.pl/articles/606275.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
concentration camp
autobiography
memoir
metatextuality
trauma, deportation
survival
Opis:
Der Band enthält die Abstracts ausschließlich in englischer Sprache.
Том не содержит аннотаций на английском языке.
Being a survivor to the Buchenwald concentration camp may implythe inability to tell this tragic experience. Semprun tries to go beyond this difficulty by writing L'écriture ou la vie. His trauma and the camp’s omnipresence determine a noncoincidence between interior and exterior time and the fragmentation of the text. Chronological linearity makes way for a labyrinthic time caractherized by a continuous change of present into past tense and by several flashbacks and metatextual digressions. The latter are also the indication that the elaboration process is underway and this suggests that art in itself makes the evolution possible.
Le numéro contient uniquement les résumés en anglais.
Źródło:
Lublin Studies in Modern Languages and Literature; 2016, 40, 2
0137-4699
Pojawia się w:
Lublin Studies in Modern Languages and Literature
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth performance and survival rate of giant gourami fingerlings (Osphronemus goramy Lacepede, 1801) with potassium diformate addition
Autorzy:
Nugraha, Algi Azmi
Yustiati, Ayi
Bangkit, Ibnu
Andriani, Yuli
Powiązania:
https://bibliotekanauki.pl/articles/1030092.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Osphronemus goramy
giant gourami
growth
potassium diformate
survival
Opis:
This research aims to determine the method of adding potassium diformate to commercial feed to increase survival and growth in gourami juvenile. The method used in this research is an experimental method using a Completely Randomized Design (CRD), consists of four treatments and four replications. The treatments used are (A) Without giving Potassium diformate (control), (B) giving potassium diformate by 0.3%, (C) giving potassium diformate by 0.5% and (D) giving potassium diformate by 0.8%. The test fish used was 300 giant gourami with a length of 4-6 cm. The containers used in this research were aquariums with a size of 40 × 30 × 40 cm3 that reared in 16 aquariums. The density of giant gourami fingerlings during the research was 10 fish per aquarium. The rearing period was 40 days. The feed given was 3% of body mass. Water quality parameters (temperature, pH and dissolved oxygen) were observed every 10 days. Other parameters are the daily growth rate, feed efficiency, the survival rate and the acidity of intestinal and stomach which were observed every 10 days. The results showed that the addition of potassium diformate by 0.3% gives the best results of daily growth rate of 1.31%, feeding efficiency of 37.18%, survival rate of 100% and decreased acidity in the intestine and stomach which helps in the process of protein absorption.
Źródło:
World Scientific News; 2020, 143; 103-114
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bayesian Exponential Survival Model in the Analysis of Unemployment Duration Determinants
Bayesowski wykładniczy model przeżycia w analizie determinant długości czasu pozostawania bez pracy
Autorzy:
Grzenda, Wioletta
Powiązania:
https://bibliotekanauki.pl/articles/906856.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
unemployment
survival exponential model
Bayesian inference
MCMC method
Opis:
The primary objective of the work is to identify demographic and socio-economic factors influencing the unemployment duration in the recent period in Poland. Different approaches to the problem have been applied. In this paper we have used a survival parametric model in Bayesian approach. The following determinants have been concerned in the model: sex, marital status, education level, information about continuing an education, region of Poland, and age of respondent. The empirical analysis is based on “Household budgets in 2008” survey of Central Statistical Office and indicates the main factors influencing unemployment duration.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2012, 269
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie analizy kohortowej do badania procesów retencji zatrudnienia
Use of Cohort Analysis in Study of Retention Processes
Autorzy:
Spyrka, Sandra
Powiązania:
https://bibliotekanauki.pl/articles/1195944.pdf
Data publikacji:
2012
Wydawca:
Szkoła Główna Handlowa w Warszawie
Tematy:
cohort
cohort analysis
retention
employee liquidity
survival curve
Opis:
This article presents a cohort analysis as a great tool to examine and to form the employees’ retention processes. The presented study confirmed that the company should pay particular attention to the processes associated with the selection of staff, i.e. to the recruitment and to the selection, but also it should examine the reasons why employees leave the organization, so that they can prevent it, especially in cases where human capital is crucial for the company.
Źródło:
Edukacja Ekonomistów i Menedżerów; 2012, 23, 1; 128-137
1734-087X
Pojawia się w:
Edukacja Ekonomistów i Menedżerów
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza przeżycia. Zagrożenie tlenową toksycznością ośrodkową. Cz. 3
Survival analysis. The risk of central oxygen toxicity. Part 3
Autorzy:
Kłos, R.
Powiązania:
https://bibliotekanauki.pl/articles/1360555.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Medycyny i Techniki Hiperbarycznej
Tematy:
survival analysis
risk assessment
analiza przeżycia
szacowanie zagrożenia
Opis:
Analiza przeżycia zajmuje się modelowaniem statystycznym przebiegów czasowych, dla których interesujące są czasy trwania pomiędzy wybraną chwilą a oczekiwanym zdarzeniem. Zdarzenie to nazywane jest rezultatem lub punktem końcowym. Dane do analizy przeżycia mogą być także traktowane, jako czas do zaistnienia zdarzenia, czas przeżycia, czas do awarii, czas niezawodności, czas trwania itp. Analiza takich danych jest ważna zarówno w medycynie 1, naukach społecznych 2 jak i w inżynierii 3. Analiza przeżycia znalazła tez zastosowanie w technice nurkowej [1]. W artykule zostały przedstawione podstawy analizy przeżycia, które posłużą do szacowania możliwości wystąpienia symptomów tlenowej toksyczności ośrodkowej przedstawione w części czwartej cyklu artykułów.
Survival analysis deals with statistical modelling of time elapsed between a particular moment and an expected event. The event is referred to as a result or an end point. The data used in survival analysis may also be treated as the time until an event occurs, time of survival, time until a failure, time of reliability, duration, etc. An analysis of such data is equally important for medicine 1, social sciences2 and engineering3. Survival analysis can also be applied to diving [1]. The article presents the basics of survival analysis which will serve in estimating the probability of an occurrence of central oxygen toxicity symptoms, which will be listed in the fourth part of the cycle of articles.
Źródło:
Polish Hyperbaric Research; 2014, 3(48); 33-48
1734-7009
2084-0535
Pojawia się w:
Polish Hyperbaric Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Psychomotor performance of Polish Air Force cadets after 36 hours of survival training
Autorzy:
Tomczak, Andrzej
Dąbrowski, Jan
Mikulski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/990831.pdf
Data publikacji:
2017
Wydawca:
Instytut Medycyny Wsi
Tematy:
military training
survival
sleep deprivation
coordination motor skills
Opis:
Introduction. The preparation of Polish Air Force cadets for survival in isolation is a necessary element of their training, to demonstrate just how difficult can be the conditions they could encounter in a combat situation. Objective. The aim of the research was to assess the effect of long-term survival training on selected coordination motor skills in Air Force cadets. Materials and method. Fifteen air force cadets aged 19.6±0.3 years exercised for 36 hours during survival training without the possibility to sleep. They were examined 4 times: Day 1 – before effort (training), Day 2 – after 24 hours training, Day 3 – directly after 36 hours training, Day 4 – next day, after an all night rest. They were examined for shooting and reaction time, the ability to maintain body balance, running motor adjustment, handgrip force differentiation, and on Days 1 and 3, exercise capacity was evaluated with a 1 mile walking test. Results. The survival training resulted in significant decreases in maximum handgrip strength, corrected 50% max handgrip, maintenance of body balance and heart rate. No changes occurred in reaction time, running motor adjustment and shooting performance. Overnight rest did not result in recovery of any of the examined factors to the values observed on Day 1. Conclusion. Survival training combined with sleep deprivation mostly affected peripheral factors depending on strong action from both muscles and nervous system, whereas complex tasks involving short-term central alertness and moderate exertion were maintained. In order to improve performance, more endurance strength training, if possible combined with sleep deprivation, should be introduced in military training.
Źródło:
Annals of Agricultural and Environmental Medicine; 2017, 24, 3
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of two valuation functions in financial and actuarial transactions
Autorzy:
Rambaud, S. C.
Valls, M. C.
Powiązania:
https://bibliotekanauki.pl/articles/971049.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
financial transaction
balance
periodic amounts
survival
target capital
Opis:
Usually a financial transaction is being considered with a single valuation function, but sometimes, and depending on the economic context, it is necessary to use one function to value the set of incoming payments and another to assess the set of outgoing payments. This paper, therefore, sets out to demonstrate that those financial transactions which use two valuation (capitalization or discount) functions can be treated in the same way as those valued with a single valuation function in which some incoming or outgoing payments are random. Our methodology is applied to determine the periodic amounts necessary to reach a target capital at a certain point in the future time in two situations, namely when the withdrawal of the capital depends on the investor’s survival, and when the receipt of the capital (by the investor or his/her beneficiaries) is assured.
Źródło:
Control and Cybernetics; 2016, 45, 1; 111-124
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elimination of Bacteria Listeria monocytogenes in Sewage from Meat Industry in Varied Temperature Conditions
Eliminacja bakterii Listeria monocytogenes w ściekach z przemysłu mięsnego w zróżnicowanych warunkach temperaturowych
Autorzy:
Szejniuk, B.
Budzińska, K.
Jurek, A.
Traczykowski, A.
Michalska, M.
Berleć, K.
Powiązania:
https://bibliotekanauki.pl/articles/1813958.pdf
Data publikacji:
2016
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
sewage
Listeria monocytogenes
survival
temperature
ścieki
przeżywalność
temperatura
Opis:
Sewage from the meat processing industry present a potential risk to the water environment, due to the presence of many pathogenic microorganisms, including Listeria monocytogenes. Contamination of untreated sewage with those bacteria is high, which is expressed by the percentage of positive samples reaching up to 93%. The aim of the study was to determine the elimination rate of three chosen strains of Listeria monocytogenes ATCC 19111; ATCC 19114 and ATCC 19115 in meat processing post-production sewage at temperatures 4 and 20°C. Experiments were conducted according to the standard of EN ISO 11290-2:1998/A1:2004. At the beginning of the experiment, in sewage samples stored at 4°C the number of cells of L. monocytogenes ATCC 19111was amounted to 1.5·108 cfu/ml, the number of ATCC 19114 was 2.5·108 cfu/ml, however the number of ATCC 19115 was 7.5·107 cfu/ml. In the initial period of the study, i.e. for the first 4 weeks, a slight decrease by one logarithmic unit of the L. monocytogenes cells number was observed in the first two strains, whereas of the strain ATCC 19115 by two units. In the 11th week of the study there was a marked decrease in the number of indicator bacteria to a level of 101 cfu in 1 ml of sewage. In the next week of the experiment, no cells of L. monocytogenes. ATCC 19111 or ATCC 19115 were noticed in the sewage, whereas bacteria of the strain ATCC 19114 were inactivated first in the 14th week of the study. In the temperature of 4°C it was shown, that the weekly elimination rate of bacteria L. monocytogenes derived from sewage ranged from 0.66 (ATCC 19114) to 0.81 (ATCC 19111) log cfu/ml. Cells of the strain ATCC 19115 expired at a rate of 0.74 log cfu/week. In sewage stored at 20°C the initial number of cells of individual L.monocytogenes strains was at the same level as in sewage stored at 4°C. After the first week of the experiment no rapid decrease was recorded in the number of the studied bacteria, and it ranged from 7.5·107 to 2.5·108 cfu/ml. In the strain ATCC 9111, after 4 weeks of the experiment there was a decrease in the number of bacteria by 4 logarithmic units, whereas in ATCC 19115 by 5 logarithmic units. Cells of the strain ATCC 19114 were isolated from sewage at 20°C for the longest time, since in the 5th week of the study they still had a level of 1.5·101 cfu/ml, whereas the other two strains underwent inactivation earlier. Statistical calculations showed that weekly elimination rate of the tested bacteria at 20°C was different for individual strains and amounted respectively to 2.03 log cfu (ATCC 19111), 1.86 log cfu (ATCC 19114) and 1.75 log cfu (ATCC 19115). Obtained results of the present study proved that during the experiment all the tested strains of L. monocytogenes survived shorter at 20°C than at 4°C. In the presented study the theoretical maximal survival time of L. monocytogenes at 4°C calculated from regression equations was the longest for the strain ATCC 19114 and amounted to 14.50 weeks (102 days), whereas cells of the two other strains, ATCC 19111 and ATCC 19115, survived definitely shorter, from 11.90 weeks (84 days) and 11.60 weeks (82 days). At 20°C, the survival time of the tested strains was similar and ranged from 5.3 weeks (37 days) to 5.7 weeks (40 days).
Ścieki z zakładów przetwórstwa mięsnego stanowią potencjalne zagrożenie dla środowiska wodnego z powodu obecności w nich wielu drobnoustrojów patogennych, w tym pałeczek Listeria monocytogenes. Kontaminacja tymi bakteriami ścieków nieoczyszczonych jest wysoka o czym świadczy odsetek pozytywnych próbek osiągający poziom do 93%. Celem przeprowadzonych badań było ustalenie tempa eliminacji trzech wybranych szczepów Listeria monocytogenes ATCC 19111; ATCC 19114 oraz ATCC 19115 w ściekach poprodukcyjnych z przetwórstwa mięsnego w temperaturze 4 i 20°C. Badania przeprowadzono zgodnie z normą EN ISO 11290-2:1998/A1:2004. Na początku eksperymentu w próbkach ścieków przechowywanych w temperaturze 4°C liczba komórek L. monocytogenes ATCC 19111 wynosiła 1,5 108 jtk/ml, ATCC 19114 przyjmowała wartość 2,5 108 cfu/ml, natomiast ATCC 19115 – 7,5 107 jtk/ml. W początkowym okresie badań przez pierwsze 4 tygodnie odnotowano nieznaczny spadek liczby komórek L. monocytogenes w przypadku dwóch pierwszych szczepów o jedną jednostkę logarytmiczną, natomiast w przypadku szczepu ATCC 19115 o dwie jednostki. W 11 tygodniu badań nastąpiło zdecydowane obniżenie liczby bakterii wskaźnikowych do poziomu 101jtk w 1 ml ścieków. W kolejnym tygodniu eksperymentu nie odnotowano w ściekach obecności komórek L. monocytogenes ATCC 19111 i ATCC 19115, natomiast bakterie szczepu ATCC 19114 uległy inaktywacji dopiero w 14 tygodniu badań. W temperaturze 4°C wykazano tygodniowe tempo eliminacji bakterii L. monocytogenes ze ścieków od 0,66 (ATCC 19115) do 0,81 (ATCC 19111) log jtk/ml. Z kolei komórki szczepu ATCC 19114 obumierały w tempie 0,74 log jtk/tydzień. W ściekach przechowywanych w temperaturze 20°C początkowa liczba komórek poszczególnych szczepów L.monocytogenes kształtowała się na takim samym poziomie, jak w ściekach w temperaturze 4°C. W przypadku szczepu ATCC 9111 po 4 tygodniach doświadczenia nastąpiło obniżenie liczby bakterii o 4 jednostki logarytmiczne, natomiast w przypadku ATCC 19115 aż o 5 jednostek logarytmicznych. Najdłużej izolowano ze ścieków w temperaturze 20°C komórki szczepu ATCC 19114, ponieważ w 5 tygodniu badań występowały one jeszcze na poziomie 1,5∙101 jtk/ml, gdy tymczasem dwa pozostałe szczepy uległy wcześniej inaktywacji. Obliczenia statystyczne wykazały, że tygodniowe tempo eliminacji badanych bakterii w temperaturze 20°C było zróżnicowane dla poszczególnych szczepów i wynosiło odpowiednio 2,03 log jtk (ATCC 19111), 1,86 log jtk (ATCC 19114) i 1,75 log jtk (ATCC 19115). Uzyskane wyniki badań dowiodły, że w trakcie doświadczenia wszystkie testowane szczepy L. monocytogenes przeżywały krócej w temperaturze 20°C niż w temperaturze 4°C. Teoretyczny maksymalny czas przeżycia pałeczek L. monocytogenes w temperaturze 4°C był najdłuższy dla szczepu ATCC 19114 i wynosił 14,5 tygodni (102 dni), natomiast komórki dwóch pozostałych szczepów ATCC 19111 i ATCC 19115 przeżywały zdecydowanie krócej od 11,9 tygodnia (84 dni) i 11,6 tygodnia (82 dni). Z kolei w temperaturze 20°C czas przeżycia testowanych szczepów był podobny i wynosił od 5,3 tygodni (37 dni) do 5,7 tygodni (40 dni).
Źródło:
Rocznik Ochrona Środowiska; 2016, Tom 18, cz. 1; 231-245
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Shock models under policy N
Autorzy:
Pérez-Ocón, R.
Montoro-Cazorla, D.
Segovia, M. C.
Powiązania:
https://bibliotekanauki.pl/articles/2069713.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
phase type distribution
shock model
reliability
survival function
Opis:
We present the life distribution of a device subject to shocks governed by phase-type distributions. The probability of failures after shock follows discrete phase-type distribution. Lifetimes between shocks are affected by the number of cumulated shocks and they follow continuous phase-type distributions. The device can support a maximum of N shocks. We calculate the distribution of the lifetime of the device and illustrate the calculations by means of a numerical application. Computational aspects are introduced. This model extends other previously considered in the literature.
Źródło:
Journal of Polish Safety and Reliability Association; 2008, 2; 295--298
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Survival of Corynebacterium pseudotuberculosis within macrophages and induction of phagocytes death
Autorzy:
Stefanska, I
Gierynska, M.
Rzewuska, M.
Binek, M.
Powiązania:
https://bibliotekanauki.pl/articles/31827.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Corynebacterium pseudotuberculosis
pathogenicity
macrophage
apoptosis
autophagy
survival
pathogen
Opis:
Since C. pseudotuberculosis is a facultative intracellular pathogen the aim of this study was focused on evaluating mechanisms that allowed these bacteria to survive in macrophages and determining their influence on induction of cell death. The influence of Corynebacteria on the programmed cell death of macrophages was determined on the basis of induction the autophagy and apoptosis in the cultures of murine macrophage cell lines J774 infected with bacteria. Corynebacterium pseudotuberculosis strains could survive within macrophages more than 48 hours. During that time bacteria were released as a result of the process that lead to death of phagocytes. This property varied among studied strains. There was no increase of micro- tubule-associated protein I light chain 3 (MAP I LC3) activity in macrophages infected with examined strains comparing with uninfected cultures and cultures treated with autophagy inducer (rapamycin) that served as negative and positive controls, respectively. The study with confocal microscopy did not show the increasing of caspase-3 activity in the infected macrophages and their nucleus did not reveal the fragmentation.
Źródło:
Polish Journal of Veterinary Sciences; 2010, 13, 1; 143-149
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cardiovascular testing of seasickness in healthy volunteers on life rafts
Autorzy:
Molisz, Andrzej
Ryk, Małgorzata
Rataj, Michał
Kołaczyńska, Barbara
Nowicka-Sauer, Katarzyna
Przewoźny, Tomasz
Sauer, Marta
Gutknecht, Piotr
Trzeciak, Bartosz
Siebert, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/2116572.pdf
Data publikacji:
2020-06-16
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
survival
impedance cardiography
seasickness
life rafts
MSAQ
MSSQ
Opis:
ObjectivesThe role of the cardiovascular system in the development of seasickness remains uncertain.Material and MethodsOverall, 18 healthy students (10 males and 8 females) aged 18–24 years volunteered in the project, spending 2–7 h on life rafts. The cardiovascular system was examined with impedance cardiography. Susceptibility and symptoms of seasickness were evaluated by the Motion Sickness Susceptibility Questionnaire Shortform (MSSQ-Short) and the Motion Sickness Assessment Questionnaire (MSAQ). The Visual Analogue Scale (VAS), ranging 0–10, was used to assess nausea, dizziness and mood. The parameters were assessed at 2 time points.ResultsDifferences in the heart rate (HR), the thoracic fluid content index (TFCI), the stroke index (SI) and the Heather index (HI) before launching the life rafts and after leaving them were observed (78.6, 20.8, 55.6 and 15.9 vs. 70.1, 19.7, 60.5 and 17.9, with p-values of 0.002, <0.001, 0.003 and 0.004, respectively). Females reacted with changes in SI and HR more vividly, whereas males regulated more HI and TFCI. In addition, HR correlated significantly with the central and peripheral symptoms in MSAQ, stroke volume (SV) with peripheral and sopite-related ones, SI with overall ones, and pulse pressure with overall, gastrointestinal and central ones (Spearman’s rank correlation coefficient [ρ] was –0.478, –0.711, 0.476, 0.472, 0.525, –0.476, –0.579 and –0.584, respectively). As regards MSSQ-Short, it correlated negatively with sopite-related symptoms in MSAQ (ρ= –0.486). Mood in VAS correlated significantly with gastrointestinal symptoms, SI and the cardiac index (CI) (ρ = –0.752, –0.492 and –0.489, respectively).ConclusionsIt was found that HR correlated negatively, and SV/SI correlated positively, with the severity of seasickness symptoms measured with MSAQ. Gender is probably an independent factor influencing reactions to motion. Women react with SI increase whereas men react with increased heart contractility (HI rise). Negative mood in seasickness evaluated with VAS seems to be mostly determined by gastrointestinal symptoms assessed with MSAQ and diminished cardiovascular indices (both CI and SI).
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2020, 33, 4; 467-477
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 282

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