Temat: Community Structure - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The relationship between parasite community structure and level of bioaccumulation of pollutants within parasite environment
Autorzy:: Sebelova, S.
Dusek, L.
Machala, M.
Gelnar, M.
Jurajda, P.
Powiązania:: https://bibliotekanauki.pl/articles/839055.pdf
Data publikacji:: 1998
Wydawca:: Polskie Towarzystwo Parazytologiczne
Tematy:: parasite
environment
bioaccumulation
community structure
pollutant
Źródło:: Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:: Annals of Parasitology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Structure of Plankton Communities in Cijulang River Pangandaran District, West Java Province, Indonesia
Autorzy:: Sahidin, Asep
Nurruhwati, Isni
Riyantini, Indah
Triandi, Muhamad
Powiązania:: https://bibliotekanauki.pl/articles/1077072.pdf
Data publikacji:: 2019
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Cijulang River
cijulang
community structure
plankton
Opis:: A river is a water ecosystem that plays an important role in the hydrological cycle and functions as a catchment area for the surrounding area. One of the organisms inhabiting river waters is plankton. The purpose of this study was to determine and analyze the structure of the plankton community in the waters of the Cijulang River and to study the relationship between plankton abundance, as well as some physical-chemical parameters of the water. The study was conducted in January, February, and March 2018 on the Cijulang River, at 5 (five) stations with a purposive sampling method. Accordingly, 17 genera were found, from 7 phytoplankton classes consisting of 6 Bacillariophyceae genera, 1 Clorophyceae genera, 2 Cyanophyceae genera, 3 Zygnematophyceae genera, 2 Desmidiaceae genera, 1 Synurophyceae genera, and 2 Fragillariophyceae genera. Also found were 10 genera from 5 classes of zooplankton consisting of 4 genera Maxillopoda, 2 genera Branchiopoda, 1 genera Gastropoda on veliger fase, 1 genera Ostracoda, and 2 genera Copepoda. The abundance of phytoplankton obtained ranges from 11-57 cells / L, while the zooplankton ranges from 8 – 40 ind/L. The diversity index (H ') = 1.397 - 2.275 and dominance index (D) = 0.022 - 0.294. Physical-chemical parameters of the waters, respectively, were 22 °C - 31 °C, light intensity 47.5 cm - 254 cm, salinity 0 ppt - 20 ppt, and dissolved oxygen 6.2 mg / L - 13.4 mg / L. Ammonia concentration 0.03 - 0.08 mg / L. All stations had a phosphate value of less than 0.16 mg / L and a silicate concentration of 0.01 - 0.0581 mg / L.
Źródło:: World News of Natural Sciences; 2019, 23; 128-141
2543-5426
Pojawia się w:: World News of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Effects of climate change on microbial community structure and function in the Antarctic glacier lagoon
Autorzy:: Swiatecki, A.
Gorniak, D.
Jankowska, K.
Zdanowski, M.K.
Borsuk, P.
Zmuda-Baranowska, M.J.
Grzesiak, J.
Powiązania:: https://bibliotekanauki.pl/articles/11992.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: climate change
microbial community
community structure
community function
Antarctic
glacier lagoon
glacier recession
Opis:: One of the dramatic effects of global warming is the retreat of glaciers. This phenomenon has intensified in the last two decades. Postglacial areas are quickly colonised by various groups of organisms. Auto- and heterotrophic microorganisms play an especially vital role in these processes. They thrive in shallow glacial lagoons which often form in front of retreating glaciers. These reservoirs are characterised by high dynamics of physicochemical parameters, including: salinity, temperature and concentrations of organic compounds and nutrients. The conducted microbiological studies have revealed rich structural and functional diversity of bacteria occurring in the ecosystem of Ecology Lagoon situated on King George Island. Bacteria found on the surface of algae and stones in the shore zone of the lagoon showed particularly intense metabolic activity. A molecular analysis has indicated that unique taxonomic groups of bacteria occur in the ecosystem of Ecology Lagoon.
Źródło:: Papers on Global Change; 2010, 17
2300-8121
1730-802X
Pojawia się w:: Papers on Global Change
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Community structure of Common carp (Cyprinus carpio Linnaeus, 1758) gut bacteria in the Cirata Reservoir, West Java Province, Indonesia
Autorzy:: Nugrahi, Tri Nazar Ulfi
Mulyani, Yuniar
Agung, M. Untung Kurnia
Iskandar, Iskandar
Powiązania:: https://bibliotekanauki.pl/articles/1839403.pdf
Data publikacji:: 2021
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Next Generation Sequencing
Bacterial community structure
Common carp gut bacteria
Opis:: Fish are aquatic animals, where they share the same ecosystem with the bacterial community they are associated with. Community structure is a concept that studies the composition of species and their abundance in a community. Information related to bacterial communities associated with their hosts is very important to support fisheries resource management efforts, both through nature conservation and aquaculture. This study of the bacterial community in the digestive tract of fish can be used to support further utilization of potential bacteria that can be used to improve the fish's immune system. This research was conducted to analyze the structure of the bacterial community found in the intestines of Common carp through a metagenomic approach using the NGS (Next-Generation Sequencing) method. The method used is a metagenomic approach, including DNA isolation from Common carp intestines. Then molecular identification was carried out using Illumina's NGS (Next-Generation Sequencing) method using the 16S rRNA gene marker. The results of the analysis using the NGS method showed as many as 19 types of bacterial phyla identified with the top three phyla, namely Fusobacteria (80%), Bacteriodetes (15%), and Firmicutes (3%). The phylum Fusobacteria is dominated by the genera Fusobacterium, Propionigenium, Ilyobacter, Leptotrichia, and Sebaldella. The phylum Bacteriodetes is dominated by the genera Porphyromonas, Odoribacter, Bacteroides, Sphingobacterium, and Barnesiella. The phylum Firmicutes is dominated by the genera Clostridium, Lactococcus, and Sarcina, Bacillus, and Lactobacillus.
Źródło:: World Scientific News; 2021, 161; 130-142
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The Relationship between Benthic Macrofauna Community Structure and Density of Mangrove Vegetation in Mempawah Mangrove Park, West Kalimantan, Indonesia
Autorzy:: Noviatri, Syafira Eka
Zahidah, Zahidah
Herawati, Heti
Dewanti, Lantun Paradhita
Powiązania:: https://bibliotekanauki.pl/articles/1031497.pdf
Data publikacji:: 2021
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Community Structure
Density
Macro-faunal benthic
Mangrove
Mempawah Mangrove Park
Opis:: This research was conducted in Mempawah Mangrove Park, West Kalimantan on July – August 2018. The research aims to map the benthic macrofauna community structure and its relationship with the structure of mangrove vegetation. The research method was a survey and use purposive sampling data method in observation stations based on different stages of mangrove vegetation. The observation stations consists of Avicennia marina and Rhizophora stylosa as the species of mangroves. Station 1 consists of mangroves in seedling size, station 2 consists of mangroves in pole size, and station 3 consists of mangrove trees. The benthic macrofauna consist of 8 species from 3 different classes, merostomata, malacostraca, and gastropods. The highest abundance value (155 ind/m2), diversity index (1,875) and similarity index (0,668) is in station 2. The relationship between benthic macrofauna abundance and mangrove density has -0,356 as the correlation coefficient which indicates that an increase of benthic macrofauna abundance is in line with the decrease of mangrove density. High density value in research shows that the mangrove is in seedling size, and vice versa a low density value indicates the mangrove trees. The coefficient of determination (0,1272) indicating that the abundance of benthic macrofauna is affected by the mangrove density as 12,72% and 87,28% affected by other factors.
Źródło:: World News of Natural Sciences; 2020, 33; 38-47
2543-5426
Pojawia się w:: World News of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Substrate influence on the structure of methanogenic Archaea communities during anaerobic digestion
Autorzy:: Dąbrowska, D.
Bułkowska, K.
Ciesielski, S.
Powiązania:: https://bibliotekanauki.pl/articles/363216.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: anaerobic digestion
Archaea community structure
biogas
PCR-DGGE
fermentacja metanowa
biogaz
Opis:: This study compares the diversity of methanogenic Archaeal communities that developed during biogas production in reactors fed with different substrates. Reactor I was fed with silages of maize and of alfalfa and timothy; and Reactor II was fed with these silages plus pig slurry and glycerol as co substrates. The Archaeal community structure was studied using polymerase chain reaction––denaturing gradient gel electrophoresis based on the 16S rRNA gene. In both reactors, Methanosphaerula palustris was most abundant, and species belonging to Methanolinea, Methanoculleus, and Methanotorris were present. Only Reactor I, where the ammonia concentration was lower, had species belonging to Methanospirillum and Methanosarcina. Thus, it appears that addition of pig slurry increased the ammonia concentration, which inhibited the growth of Methanospirillum and Methanosarcina.
Źródło:: Environmental Biotechnology; 2015, 11, 2; 41-47
1734-4964
Pojawia się w:: Environmental Biotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Fish monogeneans from a shallow, eutrophic Oswin Lake in Poland
Autorzy:: Mierzejewska, K
Wlasow, T.
Dzika, E.
Powiązania:: https://bibliotekanauki.pl/articles/838935.pdf
Data publikacji:: 2006
Wydawca:: Polskie Towarzystwo Parazytologiczne
Tematy:: lake
parasite
community composition
fish
parasite community
Polska
community structure
eutrophic lake
Monogenea
eutrophication
Lake Oswin
Opis:: A study was carried out in a shallow, eutrophic Oświn Lake, within Seven Islands Reserve (north-eastern Poland), in order to determine the infection of fish with monogeneans as sensitive indicators of water quality. This paper presents comparative analysis of the occurrence of Monogenea in fishes from two, distinctly separated pools of the lake, differing in environmental conditions. The impact of fish size and sampling season on the infection parameters was also analyzed. Material and methods. In 1998 and 1999, a total of 1091 fish representing 8 dominant species were examined. Samples were collected four times a year (in May, July, August, and October) simultaneously from the eastern and western parts of the lake. Results. 16 species of Monogenea (and some unidentified specimeus) occurred in the fish examined, most of them from the Dactylogyridae family: Dactylogyrus sphyrna, D. auriculatus, D. intermedius, D. anchoratus, D. falcatus, D. tincae, D. wunderi, D. zandti, D. difformis, D. nanus, D. distinguendus, D. crucifer, D. caballeroi. Furthermore, Tetraonchus monenteron (Tetraonchidae), Gyrodactylus elegans (Gyrodactylidae), and Paradiplozoon megan (Diplozoidae) were detected. Monogenea occurred abundantly on the gills of pike, roach, rudd, white bream, carp bream and crucian carp, but rather sporadically in tench and perch. The highest species variety and diversity of monogenean guilds were detected in carp bream and roach. It was proved that D. crucifer and D. difformis were significantly more abundant in the western pool compared to the eastern one. Infection of fish with Dactylogyridae was season-dependent, contrary to the infection of pike with T. monenteron. Intensity of infection of white bream with D. sphyrna and roach with D. crucifer increased with fish body length; such a relationship did not appear for the other monogeneans and their hosts. Conclusion. Presence of common Monogenea in the fish examined, lack of rare species, poor diversity of monogenean guilds and relatively low infection rate could be connected with the low stability of the lake environment. Location-dependent occurrence of D. crucifer and D. difformis indicated that the exchange between fish groups from the eastern and western parts of the lake is limited.
Źródło:: Annals of Parasitology; 2006, 52, 1
0043-5163
Pojawia się w:: Annals of Parasitology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Fish monogeneans from a shallow, eutrophic Oswin Lake in Poland
Autorzy:: Mierzejewska, K.
Własow, T.
Dzika, E.
Powiązania:: https://bibliotekanauki.pl/articles/2144087.pdf
Data publikacji:: 2006
Wydawca:: Polskie Towarzystwo Parazytologiczne
Tematy:: lake
parasite
community composition
fish
parasite community
Polska
community structure
eutrophic lake
Monogenea
eutrophication
Lake Oswin
Opis:: A study was carried out in a shallow, eutrophic Oświn Lake, within Seven Islands Reserve (north-eastern Poland), in order to determine the infection of fish with monogeneans as sensitive indicators of water quality. This paper presents comparative analysis of the occurrence of Monogenea in fishes from two, distinctly separated pools of the lake, differing in environmental conditions. The impact of fish size and sampling season on the infection parameters was also analyzed. Material and methods. In 1998 and 1999, a total of 1091 fish representing 8 dominant species were examined. Samples were collected four times a year (in May, July, August, and October) simultaneously from the eastern and western parts of the lake. Results. 16 species of Monogenea (and some unidentified specimeus) occurred in the fish examined, most of them from the Dactylogyridae family: Dactylogyrus sphyrna, D. auriculatus, D. intermedius, D. anchoratus, D. falcatus, D. tincae, D. wunderi, D. zandti, D. difformis, D. nanus, D. distinguendus, D. crucifer, D. caballeroi. Furthermore, Tetraonchus monenteron (Tetraonchidae), Gyrodactylus elegans (Gyrodactylidae), and Paradiplozoon megan (Diplozoidae) were detected. Monogenea occurred abundantly on the gills of pike, roach, rudd, white bream, carp bream and crucian carp, but rather sporadically in tench and perch. The highest species variety and diversity of monogenean guilds were detected in carp bream and roach. It was proved that D. crucifer and D. difformis were significantly more abundant in the western pool compared to the eastern one. Infection of fish with Dactylogyridae was season-dependent, contrary to the infection of pike with T. monenteron. Intensity of infection of white bream with D. sphyrna and roach with D. crucifer increased with fish body length; such a relationship did not appear for the other monogeneans and their hosts. Conclusion. Presence of common Monogenea in the fish examined, lack of rare species, poor diversity of monogenean guilds and relatively low infection rate could be connected with the low stability of the lake environment. Location-dependent occurrence of D. crucifer and D. difformis indicated that the exchange between fish groups from the eastern and western parts of the lake is limited.
Źródło:: Wiadomości Parazytologiczne; 2006, 52, 1; 37-47
0043-5163
Pojawia się w:: Wiadomości Parazytologiczne
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Macrozoobenthos Community Structure in Cijulang River Pangandaran District, West Java Province, Indonesia
Autorzy:: Indra, Indra
Sahidin, Asep
Andriani, Zahidah dan Yuli
Powiązania:: https://bibliotekanauki.pl/articles/1059440.pdf
Data publikacji:: 2019
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Bivalvia
Cijulang River
Community Structure
Gastropoda
Macrozoobenthos
Neritidae
Pangandaran District
Thiaridae
bioindicator
Opis:: Cijulang River, Pangandaran is a river that is used for agriculture, fisheries, industry, household activities and even as a tourist attraction. Macrozoobenthos is a bioindicator that can show changes in the quality of river waters due to these activities. The purpose of this study was to determine the macrozoobenthos community structure found on the Cijulang River, Pangandaran. The research method used is Purposive Sampling. The study was conducted at 4 stations along the Cijulang River from upstream to downstream in September - November 2018. The results of the research on the Cijulang River found 27 species of 5 classes included in 3 fillum namely Mollusca (23 species), Arthropoda (3 species) and Annelida (1 species). The value of macrozoobenthos density in the Cijulang River ranges from 29.7 - 416.3 ind/m2. Diversity index ranges from 1.48 - 2.24. The uniformity index ranges from 0.49 - 0.80. The range of water quality and substrate showed variations and dynamics that were still within the tolerance limits of macrozoobenthos life and water salinity is the main causes of variations in the macrozoobenthos community structure on the Cijulang River.
Źródło:: World Scientific News; 2019, 128, 2; 182-196
2392-2192
Pojawia się w:: World Scientific News
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Community structure of macrozoobentos on artificial reef made from reef rubble and split rock in Tunda Island, province of Banten, Indonesia
Autorzy:: Setiadeswan, Ridlo
Riyantini, Indah
Mulyani, Yeni
Pamungkas, Wahyuniar
Powiązania:: https://bibliotekanauki.pl/articles/1076630.pdf
Data publikacji:: 2019
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: Artificial Coral Reef Community Structure
Macrozoobenthos
Reefs Rubble
Split rock
Tunda Island
Opis:: Tunda Island has underwater beauty that has the potential to be developed into a marine tourism object. One important part of this is the fringing reef around the island. Unfortunately, this has been severely degraded. This study aims to determine if reef rubble and split rock artificial reefs have the ability to be a living space for macrozoobenthos and to measure the potential community structure. The research was conducted in August 2018 - November 2018 in the eastern part of Tunda Island, and included monitoring the initial conditions, artificial reef creating and positioning, gathering and analyzing macrozoobenthos data. The macrozoobenthos data collection was carried out from September to November 2018 as 4 observations, and was obtained using the Belt Transect method. In the analysis, the community structure data retrieved was divided into 3 categories: diversity, abundance and dominance. The diversity index obtained ranged from 0.43 – 7.65, meaning that it is of low to moderate diversity. The abundance of macrozoobenthos ranged from 1 - 18 individuals /m2 on the rubble type artificial reef and 2.13 – 4.26 individuals /m2 on the split type artificial reefs, with the most common class being gastropods. On rubble type artificial reefs, 14 macrozoobenthos genera were found to be common, while 13 genera were observed in the split type. The genus found was Culcita sp., Chicoreus sp., Diadema sp., Chelidonura sp., Thrombus sp., Chromodoris sp., Cymatium sp., Trochus sp., Terebra sp., Dardanus sp., Malea sp., Oliva sp., Opheodosoma sp., Actinopyga sp., Conus sp., Enoplometopus sp., Cypracea sp., Lambis sp., and Phylidia sp. The dominance index value was in the range of 0.18-1.00 or low to high on both rubble and split types.
Źródło:: World News of Natural Sciences; 2019, 27; 128-140
2543-5426
Pojawia się w:: World News of Natural Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Influence of horse age, breed and type of horse management on the community structure of strongylids (Nematoda: Strongylida) in domestic horses
Autorzy:: Kharchenko, V.A.
Kuzmina, T.A.
Dzeverin, I.
Powiązania:: https://bibliotekanauki.pl/articles/6248.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Parazytologiczne
Tematy:: horse
animal age
animal breed
management
community structure
parasite
strongylid
Nematoda
Strongylidae
domestic horse
Źródło:: Annals of Parasitology; 2016, 62, Suppl.
0043-5163
Pojawia się w:: Annals of Parasitology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Preliminary investigations of the chironomid larvae fauna (Chironomidae, Diptera) from the Mavrovo reservoir – Republic of Macedonia
Autorzy:: Ilieska, Radmila
Smiljkov, Stoe
Powiązania:: https://bibliotekanauki.pl/articles/1386379.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:: reservoir
chironomids
community structure
dominance
seasonal density
zbiornik
ochotkowate
struktura zgrupowań
dominacja
zagęszczenie sezonowe
Opis:: Larval stages of the Chironomidae (Diptera) can be found in almost any aquatic habitat, including artificial lakes. They form an important fraction of the macrozoobenthos of most freshwater ecosystems. The Mavrovo reservoir as an artificial lake in the Republic of Macedonia, to date, has never been an object of hydrobiological research of this type. For that reason, the purpose of this study was to conduct research on the composition and structure of the chironomid larvae fauna that inhabits the Mavrovo reservoir. The quantitative samples for this research were collected during one year (2017/18), seasonally from five different localities (T1–T5) – T1-Ulazna, T2-Hotel Radika, T3-Middle of the reservoir, T4-Bunec, and T5-Old church (village Mavrovo). According to the results, Chironomidae was represented with five subfamilies, two tribes, and 25 taxa. The subfamilies are Chironominae with the two tribes Chironomini and Tanytarsini, Tanypodinae, Orthocladiinae, Diamesinae, and Prodiamesinae. The dominant taxon is Tanytarsus sp., and besides it, the following taxa: Procladius sp., Chironomus plumosus, Harnischia sp., Polypedilum nubeculosum, and Orthocladius saxicola are characterized by greater community participation. The highest density of chironomid larvae fauna was recorded during the summer, a total of 1013.69 ind/m2, compared to the lowest registered in the spring season which is only 9.78 ind/m2.
Stadia larwalne Chironomidae (Diptera) są znajdowane w niemal wszystkich środowiskach wodnych, łącznie z jeziorami zaporowymi. Stanowią one bardzo ważną frakcję makro-zoobentosu w większości słodkowodnych ekosystemów. Zbiornik Marvoro jest jeziorem zaporowym w Republice Macedonii i do tej pory nie było obiektem tego typu badań hydrobiologicznych. Z tego powodu celem było przeprowadzenie badań składu i struktury fauny larw ochotkowatych zamieszkujących zbiornik Mavrovo. Badania prowadzono za pomocą prób ilościowych, pobieranych w ciągu jednego roku (2017/2018), w poszczególnych sezonach wegetacyjnych w następujących lokalizacjach (T1–T5) – T1 –Ulazna, T2 – Hotel Radika, T3 – środek zbiornika, T4 – Bunec i T5 – stary kościół (wieś Mavrovo). Fauna Chironomidae była reprezentowana przez pięć podrodzin, dwa plemiona i 25 taksonów. Podrodziny to Chironominae z dwoma plemionami Chironomini i Tanytarsini, Tanypodinae, Orthocladiinae, Diamesinae i Prodiamesinae. Dominującym taksonem był Tanytarsus sp., wysokimi udziałami w zbiorowisku charakteryzowały się również taksony: Procladius sp., Chironomus plumosus, Harnischia sp., Polypedilum nubeculosum i Orthocladius saxicola. Najwyższe zagęszczenie larw ochotkowatych odnotowano latem, łącznie 1013,69 ind/m2, w porównaniu do najniższego zarejestrowanego w sezonie wiosennym, który wynosi zaledwie 9,78 ind/m2.
Źródło:: Acta Biologica; 2020, 27; 117-130
2450-8330
2353-3013
Pojawia się w:: Acta Biologica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Struktura społeczności sieci powiązań rad dyrektorów przedsiębiorstw na polskim rynku kapitałowym
Community Structure in the Boards Network of Enterprises on Polish Capital Market
Autorzy:: Siudak, Dariusz
Powiązania:: https://bibliotekanauki.pl/articles/1365412.pdf
Data publikacji:: 2015-06-30
Wydawca:: Główny Urząd Statystyczny
Tematy:: struktura społeczności
funkcja jakości podziału
wspólna dyrekcja
sieć
community structure
modularity
interlocking directorate
network
Opis:: W artykule podjęto problematykę struktury społeczności sieci przedsiębiorstw powiązanych wspólną dyrekcją. Badaniem objęto 518 przedsiębiorstw w ramach największego komponentu spośród łącznie 902 przedsiębiorstw notowanych na głównym rynku Giełdy Papierów Wartościowych w Warszawie oraz na rynku NewConnect pod koniec 2014 r. Oceny siły struktury społeczności dokonano za pomocą funkcji jakości podziału Q, obliczoną dla siedmiu podziałów przedsiębiorstw stosując odpowiednio odmienne algorytmy. Przeprowadzona analiza pozwoliła stwierdzić występowanie silnej struktury społeczności w sieci powiązań przedsiębiorstw na polskim rynku kapitałowym.
The article looks at the community structure in the network of interlocking directorates. The study covered 518 enterprises within the largest component of the total of 902 companies listed on the main market at the Warsaw Stock Exchange and on the NewConnect at the end of 2014. The strength of the community structure was assessed using the distribution function for quality (modularity), calculated for seven divisions of enterprises with different algorithms, respectively. The analysis led to the conclusion that the community structure existing in the board network between enterprises on Polish capital market is strong.
Źródło:: Przegląd Statystyczny; 2015, 62, 2; 183-197
0033-2372
Pojawia się w:: Przegląd Statystyczny
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Kształtowanie się wydatków inwestycyjnych w gminach powiatu strzeleckiego
The shaping of expenditure investments in communities of Strzelecki district
Autorzy:: Zygmunt, Justyna
Powiązania:: https://bibliotekanauki.pl/articles/540968.pdf
Data publikacji:: 2013
Wydawca:: Wyższa Szkoła Bankowa we Wrocławiu
Tematy:: wydatki inwestycyjne
gmina
struktura wydatków gminy
investment expenditures
community, community expenditures structure
Opis:: W pracy podjęta została problematyka wydatków inwestycyjnych ponoszonych przez gminy. Głównym celem było przeprowadzenie badań nad istotą wydatków inwestycyjnych w strukturze wydatków gmin, na podstawie gmin powiatu strzeleckiego. Konstrukcję pracy tworzą dwie części. Pierwsza z nich obejmuje rozważania dotyczące znaczenia wydatków inwestycyjnych w gminie. Natomiast w drugiej części zaprezentowane zostały wyniki badań empirycznych dotyczących kształtowania się wydatków inwestycyjnych w badanych gminach.
The paper focuses on the issue of community investment expenditures. The main point of this paper is to study the essence of investment expenditures in community expenditures structure as based on the communities of Strzelecki district. The structure of the paper is as follows: the first part contains the considerations over the significance of investment expenditures in community whereas the second part includes the results of empirical research in the expenditures in communities in question.
Źródło:: Zeszyty Naukowe Wyższej Szkoły Bankowej we Wrocławiu; 2013, 6(38); 145-153
1643-7772
Pojawia się w:: Zeszyty Naukowe Wyższej Szkoły Bankowej we Wrocławiu
Dostawca treści:: Biblioteka Nauki