Wyniki wyszukiwania - BazTech

1

Investigation of the possibility of using artificial neural networks in the process of assessing the threat of lightning

Sobieska Emilia, Sobolewski Konrad

Przegląd Elektrotechniczny

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2023

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R. 99, nr 1

211--214

EN

The article presents issues related to the possibility of using an artificial neural network to classify factors describing the lightning hazard. It also analyzed the selection of the most optimal type of neural network for this type of task, as well asthe issue of input data, which both teach the neural network and form the basis for the final classification. Finally, the conclusions and assumptions necessary for the practical implementation of the task were drawn. The practical part of the task is planned as the following consideration stage.

PL

W artykule została przedstawiona problematyka związana z możliwością wykorzystania sztucznej sieci neuronowej do przeprowadzenia klasyfikacji współczynników opisujących zagrożenie piorunowe. Przeanalizowano wybór najbardziej optymalnego rodzaju sieci neuronowej dla tego rodzaju zadania, a także kwestię danych wejściowych, które posłużą zarówno do uczenia sieci neuronowej, jak również stanowią podstawę do końcowej klasyfikacji. Na koniec wyciągnięte zostały wnioski oraz założenia niezbędne do praktycznej realizacji zadania. Praktyczna część zadania będzie stanowić kolejny etap rozważań.

2

Assessing Environmental Factors on the Growth and Distribution of Mangrove Seedlings Along the Bintuni Riverbank Area, Bintuni Bay, West Papua, Indonesia

Sraun Markus, Bawole Roni, Marwa Jonni, Sinery Anton Silas, Cabuy Reinardus Liborius

Journal of Ecological Engineering

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2023

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Vol. 24, nr 8

1--11

EN

Bintuni Bay is considered one of the largest mangrove ecosystems in the world, and it has benefited a lot to local inhabitants and the surrounding ecosystem by underpinning and maintaining ecosystem balances. This study assesses various environmental factors that affect the flow of the Bintuni River and mangrove ecosystems as a result of potential degradation due to various anthropogenic activities and small-scale industries along the river. Several environmental parameters were collected, measured, and analyzed in the laboratory, while mangrove seedlings were measured and calculated at five different locations to obtain the importance value index (IVI). The results indicated slightly varied environmental parameters and concentrations at the five locations. However, there was no significant difference in the environmental parameters between the five different locations (p-value of 0.953 > 0.05, 95% of CI). Mangrove seedlings were distributed evenly along the five different locations which were indicated by the number of individuals (ind/ha). There was no significant correlation among these environmental parameters because of the low concentrations of chemical and biological compounds in the water. Moreover, mangroves can regenerate, grow, and exist even in extreme and unbalanced environmental niches.

3

Identification and prioritization of factors influencing the increase in construction costs of building investments using factor analysis

Seyedebrahimi Seyedkazem, Mirjalili Alireza, Sadeghian Abolfazl

Archives of Civil Engineering

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2021

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Vol. 67, nr 3

705--722

EN

A large portion of the credits and financial resources of countries is spent on the preparation and construction of building projects because their implementation would create housing, job opportunities, financial turnover, and economic prosperity. At present, many construction projects are under construction in developing countries, and most of these projects are facing rising costs. The local scope of this research is construction projects in Yazd city. This research is operational in terms of purpose and was carried out in a descriptive and survey manner with an analytical-mathematical method. Data collection was done by documentary and survey methods. The Statistical Society consisted of 150 managers and officials, contractors, and actors involved in construction projects. Data analysis by hierarchical analysis technique showed that the criterion of management factors with a weight of 0.582 has the highest priority in increasing building costs. The criterion of environmental factors with a weight of 0.309 is at the second priority. The criterion of legal and administrative factors with a weight of 0.109 is in the third priority. Therefore, a key element in increasing the cost of construction projects in the under-studied city is the management factor that can be reduced by establishing new management systems and improving the quality of construction projects.

4

The impact of entrepreneurial and environmental factors on entrepreneurial intention of banking sector of Indonesia

Tanwir, Mahrinasari M. S., Bangsawan Satria

Polish Journal of Management Studies

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2020

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Vol. 21, No. 2

412--424

EN

The current study aims to investigate the impact of four exogenous variables, namely, entrepreneurial orientation, entrepreneurial education, environmental factors, college experience toward the entrepreneurial intention of banking sector of Indonesia. To achieve this objective, data has been collected from the 450 managers of the banking sectors, and PLS-SEM was used to test the hypotheses. The key findings of the study have shown that entrepreneurial orientation, college experience, and environmental factors have a positive and significant effect on the entrepreneurial intention of banking sector of Indonesia. Based on the findings of the study, there are several practical and theoretical implications. The findings of the study could provide help to the policymakers to know about the importance to increase the entrepreneurial intention by the following exogenous variables. The findings of the study could also provide help to the researchers to conduct future research to increase the importance of the following study.

PL

Obecne badanie ma na celu zbadanie wpływu czterech zmiennych egzogenicznych, a mianowicie: orientacji przedsiębiorczej, edukacji przedsiębiorczej, czynników środowiskowych, doświadczenia uczelni na intencję przedsiębiorczości sektora bankowego w Indonezji. Aby osiągnąć ten cel, zebrano dane od 450 menedżerów sektorów bankowych, a do przetestowania hipotez wykorzystano PLS-SEM. Kluczowe wyniki badania wykazały, że orientacja na przedsiębiorczość, doświadczenie w nauce i czynniki środowiskowe mają pozytywny i znaczący wpływ na intencję przedsiębiorczości sektora bankowego w Indonezji. W oparciu o wyniki badania istnieje kilka praktycznych i teoretycznych implikacji. Wyniki badania mogą pomóc decydentom w zrozumieniu znaczenia zwiększenia intencji przedsiębiorczości przez następujące zmienne egzogeniczne. Wyniki badania mogą również pomóc naukowcom w przeprowadzeniu przyszłych badań w celu zwiększenia znaczenia następnego badania.

5

Influence of Branch Death on Leaf Nutrient Status and Stoichiometry of Wild Apple Trees (Malus sieversii) in the Western Tianshan Mountains, China

Tao Ye, Nuerhailati Maziyirea, Zhang Yuan-Ming, Zhang Jing, Yin Ben-Feng, Zhou Xiao-Bing

Polish Journal of Ecology

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2020

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Vol. 68, nr 4

296--312

EN

The wild apple tree Malus sieversii is a tertiary relict species and a key ancestor of the commonly cultivated apple trees today. In recent years, many M. sieversii individuals have died or have severe dead branches. Whether branch death would lead to the change in nutrient stoichiometry of M. sieversii remains unclear. In this study, the nitrogen (N), phosphorous (P), and potassium (K) stoichiometric traits of M. sieversii individual trees with different proportion of dead branches divided into three classes (Class I [< 20%], Class II [40-60%], and Class III [> 80%]) during annual growth period, elemental scaling relations, and the possible influencing factors were systematically analysed. Leaf N, P, and K decreased during growing season, and N and P did not show significant differences among the three classes; however, the Class III wild apple trees had the lowest K contents in both photosynthetic and reproductive organs. Flowers had higher P and K contents than leaves, whereas fruits had low N content. The growth of M. sieversii was always limited by N due to low N:P ratio and N resorption efficiency. The scaling exponents of leaf N-P, N-K, or P-K among the three classes did not show any significant differences, revealing an inherent property of M. sieversii. Most soil variables showed weak correlations with leaf nutrient parameters (except for K). Precipitation and relative humidity, rather than temperature, showed significantly positive effects on leaf nutrients. These findings suggest that increasing water input and plant K content may be conducive to enhance the resistance and recovery ability of diseased wild apple trees.

6

Właściwości energetyczne i spektralne powłokowego szkła niskoemisyjnego poddanego działaniu czynników symulujących przyspieszone starzenie

Balon-Wróbel Anna, Marczewska Agnieszka

Materiały Budowlane

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2020

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nr 8

48--50

PL

W artykule omówiono odporność szkła niskoemisyjnego na działanie czynników symulujących przyspieszone starzenie. Zakres badań obejmował poddanie przygotowanych próbek szkła działaniu warunków symulujących oddziaływanie czynników środowiskowych. Uzyskane wyniki badań pozwoliły na ocenę ich wpływu na właściwości izolacyjne oraz świetlne i energetyczne szkła niskoemisyjnego. Wykazały, że np. oddziaływanie mgły solnej powoduje pogorszenie parametrów termicznych szyb.

EN

In paper resistance of low-emission glass to the effects of factors simulating accelerated ageing were discussed. The scope of research included subjecting the prepared glass samples to conditions simulating the impact of environmental factors. Obtained research results allowed to assess the impact of factors on the insulating, light and energy properties of low-emission glass. It was found that for example the effect of salt fog causes deterioration of the thermal parameters of this glass.

7

Impacts of Environmental Heterogeneity on Distribution Pattern of Moss Crust Patches in Temperate Desert in Central Asia

Ji X.-H., Pang S.-Q., Zheng Q.

Polish Journal of Ecology

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2018

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Vol. 66, nr 2

83--101

EN

Moss crusts are the highest developmental stage of biological crusts in arid and semiarid ecosystems worldwide. Under natural conditions, elementary functional units of moss crusts are patches. However, to date, the quantitative features, distribution pattern, ecological effect and relationship with environmental factors of moss patches in desert ecosystems remain unclear. In this study, 3303 moss patches in 22 plots and relevant environmental variables were investigated and quantified in the Gurbantunggut Desert, China. Thirty-six patch classes were defined. Moss crusts accounted on average for 11.7% of the plot area, and the mean moss patch area was 23.4 cm2. Small patches dominated, indicating a serious fragmentation of moss crusts. Significant density-dependent effects between patch density and size, humped relationships between patch size and moss plant density, and soil water content under moss patches were observed. The overall distribution of moss crusts showed a tendency of moss patch size and moss plant density decreasing from the southeastern part of the desert to the northwestern part, while moss patch density showed the opposite trend. Pearson's correlation analysis and nonmetric multidimensional scaling analysis consistently demonstrated that the distributions of moss patches were dominantly influenced by non-moss crust coverage, sand particle size, latitude, mean annual precipitation (MAP) and mean annual temperature. Of these parameters, fine sand, high MAP and low latitude were beneficial to the development of moss crusts. Consequently, the factors influencing the distribution pattern of moss crusts are complex and contain the soil factor, current climatic conditions and natural and human disturbances.

8

Czynniki atmosferyczne i środowiskowe wpływające na zagrożenia, awarie i katastrofy obiektów budowlanych

Runkiewicz L., Sieczkowski J.

Przegląd Budowlany

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2017

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R. 88, nr 10

103--107

PL

Artykuł omawia następujące zagadnienia: ocenę bezpieczeństwa i solidność konstrukcji budynku, wpływ czynników atmosferycznych na spadek bezpieczeństwa konstrukcji, przyczyny awarii. Opisuje przykłady prezentujące możliwe uszkodzenia ze strony czynników atmosferycznych.

9

The influence of environmental factors on employee comfort based on an example of location temperature

Szer I., Błazik-Borowa E., Szer J.

Archives of Civil Engineering

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2017

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Vol. 63, nr 3

163--174

EN

Work in unfavorable, changing environmental conditions negatively affects people working on scaffoldings used on construction sites, which may increase the risk of occurrence of dangerous situations. The purpose of this article is to show the scale of temperature changes which workers are exposed to. The paper compares examples of temperature measurements obtained from a metrological station and during tests on scaffoldings located in the Lodz and Warsaw regions. This article also presents the methodology of examining environmental parameters of the surroundings where employees work on scaffoldings. Analysis results show that high temperatures and significant temperature variations frequently occur on the scaffoldings, which leads to a lack of adaptability and consequently to tiredness or decreased alertness. Unfavorable environmental conditions can lead to behaviors which, in turn, can cause accidents.

PL

Praca w niekorzystnych, zmieniających się warunkach środowiskowych, oddziałuje niekorzystnie na osoby pracujące na rusztowaniach, wykorzystywanych na budowach, mogąc zwiększać ryzyko wystąpienia sytuacji niebezpiecznych. Celem artykułu jest prezentacja wpływu temperatury na komfort pracy osób, pracujących na rusztowaniach. Wprowadzono założenie uproszczające, tzn. przyjęto, że temperatura jest głównym czynnikiem, wpływającym na komfort pracy oraz niezależnym od innych. Do dalszej analizy wybrano przede wszystkim dane wykonane przez IMGW (Instytut Meteorologii i Gospodarki Wodnej) oraz własne pomiary temperatury na rusztowaniach. W tym celu uzyskano z IMIGW (strona internetowa ogimet.com) wyniki pomiarów temperatury dla tych samych przedziałów czasowych, w których badane były rusztowania, ze stacji badawczych zlokalizowanych odpowiednio w Łodzi i Warszawie z lat 2012-2016. Główna grupa danych to wyniki pomiarów temperatury na rusztowaniu. Na dziesięciu rusztowaniach wykonano pomiary temperatury, w tym pięć w Łodzi i pięć w Warszawie lub miastach sąsiadujących z Warszawą. Pomiary wykonywano od kwietnia do sierpnia 2016 roku. Seria pomiarów na jednym rusztowaniu obejmowała pomiary przez pięć dni od poniedziałku do piątku w godz. 8.00, 11.0 i 14.00, nazywanych porami dnia, na różnych poziomach rusztowania. Pomiar w pierwszym punkcie rozpoczynał się o danej godzinie. Pomiary parametrów środowiskowych wykonywane były w czterech, sześciu, dziewięciu lub dwunastu miejscach na rusztowaniu w zależności od szerokości i wysokości rusztowania oraz od dostępności.

10

Spatial and seasonal variations of large tintinnid ciliates in Shenhu Bay of China

Wang Y., Zhang W., Lin Y., Zheng L., Cao W., Yang J.

Oceanological and Hydrobiological Studies

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2014

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Vol. 43, No. 3

292--302

EN

In this study, the spatial distribution and seasonal variation of large tintinnids (>76 μm) were investigated in Shenhu Bay during three seasons of 2012. Of the 36 species identified, 9 were dominant (i.e. Tintinnopsis radix, Leprotintinnus simplex, Tintinnopsis japonica, Tintinnopsis tubulosoides, Leprotintinnus nordqvisti, Tintinnopsis beroidea, Stenosemella parvicollis, Tintinnidium primitivum, Tintinnopsis nana). A clear seasonal shift of the taxonomic composition as well as the lorica size of the dominant species was observed. The highest numbers of tintinnid species occurred in spring, while the highest abundance and biomass occurred in summer. Clustering indicated that the seasonal variations of the community structure were more obvious than spatial variations. Spearman correlation analysis revealed that density of phytoplankton prey had a significant impact on the tintinnid abundance. Redundancy analysis (RDA) illustrated that temperature, salinity and the nutrient level were the most important abiotic factors affecting the spatial and seasonal pattern of tintinnid communities in Shenhu Bay.

11

Santiago Calatrava – kreatywność i innowacyjność w architekturze mostów

Boniecka J.

Inżynieria i Budownictwo

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2013

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R. 69, nr 9

484--488

PL

Podjęto próbę analizy twórczości Santiago Calatravy w aspekcie wrażeń estetycznych i potrzeb psychicznych człowieka, funkcji społecznej i czynnika środowiskowego oraz kształtowania konstrukcji obiektu mostowego z uwzględnieniem aspektu ekonomicznego. Przedstawiono przykłady zrealizowanych obiektów mostowych.

EN

The aim of this article is to analyze the works of Santiago Calatrava in respect of aesthetic values and psychological needs of man, the social function and environmental factors as well as the shaping of a bridge structure considering the economic aspect. The examples of the realized bridge structures were presented.

12

Research on effects of environmental factors on photovoltaic panels and modeling with Matlab/Simulink

Rustemli S., Dincer F., Almali M. N.

Przegląd Elektrotechniczny

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2012

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R. 88, nr 7a

63-66

EN

In the early days of photovoltaic panels, some 50 years ago, the energy required to generate a photovoltaic panel was more than the energy the panel could generate during its lifetime. As a result of many years of research and experimental studies with today this time can drop up to 3-4 years according to the incentive policies of the some countries. Only obstacle to widespread adoption of photovoltaic panels is cost of their. Therefore, even small studies on photovoltaic panel have great importance to reduce the cost of photovoltaic panel. One of the most important ones is the panel temperature and environmental effects because these factors are affected the panel temperature. In this study, environmental factors that affect to electricity generation capacity of photovoltaic panels have obtained as detailed style with modeling and simulation is designed by Matlab/Simulink programme. Also, environmental factors is added to the model and is entered the system. In addition to this situation were applied on loaded. With this modeling the effects of environmental factors for photovoltaic panels are designed and discussed as detailed by Matlab/Simulink programme.

PL

W artkule zaprezentowano warunki poprawy pracy paneli fotowoltaicznych. Jednym z istotniejszych parametrów jest temperatura panelu i warunki środowiskowe. Zaproponowano model matematyczny panelu uwzględniający warunki środowiskowe.