Wyniki wyszukiwania - Biblioteka Nauki

1

Ważne zabiegi na plantacji ziemniaków

100%

Mroczek B.

|

nr 05

2

Sleep problems and related factors in rural and urban populations in Western Pomerania, Poland

72%

Wolinska W. , Mroczek B.

|

nr 3

3

Proposal for managing electric energy quality in the LV grid using on-load tap changer with a static synchronous compensator

72%

Mroczek B. , Fatyga K.

|

tom T. 8, nr 2

72--78

EN

The paper proposes the use of auxiliary equipment in the low voltage network: an on-load tap changer and a static synchronous compensator (STATCOM) to improve the quality of energy supply to end users. As part of the research, a section of medium and low voltage power grid was modelled using Matlab & Simulink software, which was tested in three scenarios. The first scenario presents the operation of the power grid with the on-load tap changer installed in the transformer block. The second scenario uses the STATCOM for local reactive power compensation. Additionally, the third scenario is the combined work of the on-load tap-changer along with the STATCOM. According to the authors, the method discussed does not bring the expected results in the area of voltage quality improvement, indicating that further research is required, including tests with energy storage.

PL

W artykule zaproponowano zastosowanie pomocniczych urządzeń w sieci niskiego napięcia: podobciążeniowego przełącznika zaczepów oraz kompensatora mocy biernej (STATCOM) w celu poprawy jakości energii dla odbiorców końcowych. Zamodelowano fragment sieci elektroenergetycznej średniego i niskiego napięcia za pomocą oprogramowania Matlab & Simulink, który został poddany badaniu w ramach trzech scenariuszy. Pierwszy scenariusz prezentuje pracę sieci elektroenergetycznej z podobciążeniowym przełącznikiem zaczepów zainstalowanym w kadzi transformatora. Drugi scenariusz wykorzystuje STATCOM do lokalnej kompensacji mocy biernej. Natomiast trzeci scenariusz jest to jednoczesna praca podobciążeniowego przełącznika zaczepów wraz ze STATCOM. Zaprezentowany sposób według autorów nie przyniósł oczekiwanych rezultatów w zakresie poprawy jakości napięcia i wskazuje na dalszą potrzebę badawczą z wykorzystaniem magazynów energii.

4

Sustainable Development and Wind Farms

58%

Mroczek B. , Kurpas D. , Klera M.

|

tom Vol. 8, nr 2

113--122

EN

According to assumptions adopted by the European Union, energy production from renewable energy sources (RES) on a community-wide scale will reach 20% by 2020. One way to achieve this ambitious target is to develop wind energy. However, its evaluation is inconclusive. Among the benefits, its positive impact on the environment is constantly emphasised, in particular the lack of polluting emissions during electricity production. At the same time, wind turbines, a new, unfamiliar element appearing on the landscape could constitute an additional source of human stress. In this article the authors attempt to assess the investments in wind power in Poland. The discussion takes into account environmental, social and economic aspects in accordance with the concept of sustainable development.

PL

Według przyjętych w Unii Europejskiej założeń, produkcja energii z odnawialnych źródeł energii (OZE) w skali całej Wspólnoty ma w 2020 r. osiągnąć poziom 20%. Jedną z dróg prowadzących do osiągnięcia tego ambitnego celu jest rozwój energetyki wiatrowej. Jej ocena nie jest jednak jednoznaczna. Wśród korzyści podkreśla się pozytywny wpływ na środowisko, w szczególności fakt braku emisji zanieczyszczeń podczas produkcji energii elektrycznej. Zarazem turbiny wiatrowe stanowią nowy, obcy element pojawiający się w krajobrazie, mogąc stanowić dla człowieka źródło dodatkowego stresu. W niniejszym artykule podjęto próbę oceny ocena inwestycji związanych z energetyką wiatrową na przykładzie Polski. Zgodnie z koncepcją rozwoju zrównoważonego dyskusja została przeprowadzona z uwzględnieniem aspektów: ekologicznych, społecznych i ekonomicznych.

5

Health impact of wind farms

51%

Kurpas D. , Mroczek B. , Karakiewicz B. , Kassolik K. , Andrzejewski W.

|

nr 3

EN

Introduction and objective: Wind power is employed worldwide as an alternative source of energy. At the same time, however, the health effects of wind turbines have become a matter of discussion. The purpose of this study is a critical review of available reports providing arguments both for and against the construction of wind farms. The authors also attempt to propose recommendations in accordance with the Evidence-Based Medicine (EBM) guidelines. In the case of exposure to wind farms, a randomized controlled trial (RCT) is impossible. To obtain the highest-level recommendations, analysis of case-control studies or cohort studies with control groups should be performed. Preferably, it should include geostatistical analysis conducted with the use of variograms and the kriging technique. Combinations of key words were entered into the Thomson Reuters Web of KnowledgeSM and the Internet search engine Google. Short description of state of the art: The nuisance caused by wind turbines is stereotypically linked with the noise that they produce. Nevertheless, the visual aspect of wind farms, opinions about them, and sensitivity to sound seem to be of the greater importance. To date, the direct correlations between the vicinity of modern wind farms, the noise that wind turbines make, and possible consequences to health have not been described in peer reviewed articles. Health effects are more probably associated with some environmental factors leading to annoyance or frustration. All types of studies share the same conclusion: wind turbines can provoke annoyance. As with any project involving changes in the local environment, a certain level of irritation among the population can be expected. There are elected officials and government representatives who should decide what level of social annoyance is acceptable, and whether wind power advantages outweigh its potential drawbacks. The influence of wind turbines on human emotional and physical health is a relatively new field of research. Further analyses of these issues are justified, especially because none of the studies published in peer-reviewed journals so far meet the criteria for cohort or case-control studies. Summary: Due to methodology, currently available research results do not allow for higher than C-level recommendations. In the case of wind farms, the ideal types of research would be: a retrospective observation of a particular group of residents before and after the wind farm construction, case-control studies or cohort studies with control groups matched in respect of socioeconomic factors, predisposition for chronic diseases, exposure to environmental risk factors, and only one variable which would differentiate cases from controls – the distance between place of residence and a wind farm.

6

Patient aggression towards health care professionals

51%

Mroczek B. , Mormul J. , Kotwas A. , Szkup M. , Kurpas D.

|

nr 2

67-74

EN

Purpose: To estimate the frequency of aggressive behaviors in health care institutions, and determine their influence on emotional reactions of medical workers. Materials and methods: The study involved 201 health care professionals from the regions of Lower Silesia and Opole in Poland. The authors employed the exposure to patient aggression inventory, based on the questionnaires of Merecz and Nowicka & Kolasa; this inventory divides patient aggression towards medical workers into seven different forms. Results: In over 90% of cases, health care professionals fell victim to patient aggression in a workplace. It mostly took forms of verbal aggression, a raised voice and shouting. A physical attack was reported by 45.6% of the surveyed; it resulted in physical injuries in 27.9% of psychiatric hospital workers and 24.7% of general hospital workers. As a reaction to patients’ verbal aggression, medical workers usually calmly explained that such behavior was improper. Violence and aggressive behaviors of patients evoked workers’ anger, fear, a feeling of resignation and the loss of their sense of safety. In most case's victims of patient aggression either coped with the problem themselves or asked their co-workers and superiors for help. Conclusions: Aggressive behaviors of patients arouse in medical staff, mostly anger. Medical workers usually cope with patient aggression themselves; nurses more often than other health care professionals ask their superiors and co-workers for help. It is necessary to conduct further research into the problem of patient aggression towards medical staff so that actions ensuring safety for workers can be taken.

7

Significant association of DRD2 and ANKK1 genes with rural heroin dependence and relapse in men

37%

Lachowicz M. , Chmielowiec J. , Chmielowiec K. , Suchanecka A. , Masiak J. , Michalowska-Sawczyn M. , Mroczek B. , Mierzecki A. , Ciechanowicz I. , Gezywacz A.

|

tom 27

|

nr 2