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Tytuł:
Synteza sprzętowa i programowa symulatora sterowania ruchem pojazdów na określonym obszarze
Hardware and software synthesis of a traffic control simulator for a specific area
Autorzy:
Małecki, K.
Jaszczak, S.
Sokołowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/156699.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
symulacja ruchu drogowego
sterowniki PLC
traffic simulation
programmable logic controller (PLC)
Opis:
W niniejszym artykule przedstawiono wieloelementowe, sprzętowo-programowe środowisko symulacyjne do sterowania ruchu drogowego. Główną ideą było wytworzenie łatwo rozbudowywalnego, elastycznego symulatora ruchu drogowego umożliwiającego prowadzenie badań z zakresu sterowania ruchem drogowym. Wykorzystano do tego specjalnie opracowane makiety obszarowe (różne rodzaje skrzyżowań dróg), sterowniki PLC oraz opracowano program komputerowy interpretujący dane pochodzące z makiet.
The multi-component, hardware and software simulation environment for traffic control is presented in this paper. The main idea was to create easy extendable, flexible simulation facility for research in the field of traffic control. A specially designed model area (different types of road junctions: a T-type intersection, crossing four roads classical and a typical junction, which is a model of a real system of roads in Szczecin), PLCs and a proprietary computer program that interprets data from the model were used for this purpose. The paper presents the concept of a hardware-software simulator (Fig. 1) together with a description of individual elements (Figs. 2, 3 and 5). It is worth mentioning that the way to develop a program and the layout and type of PLC allows the connection of any mock-ups that will provide the appropriate signals. These signals are interpreted and on the basis of them the so-called scenario will be generated. Finally, the paper presents a real situation that could occur at the T-type intersection (vehicle enters the intersection and cannot leave it). Due to the fact that the models are equipped with the so-called inductive loops, the system offers an appropriate scenario to avoid blocking the intersection. The paper can be concluded with a statement that the developed hardware-software simulator allows conducting research in the field of traffic control in a safe and collision-free way.
Źródło:
Pomiary Automatyka Kontrola; 2012, R. 58, nr 7, 7; 608-610
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie OPC i Modbus w zarządzaniu siecią sterowników PLC
Management of the PLC controllers network using OPC and Modbus
Autorzy:
Jaszczak, S.
Małecki, K.
Sokołowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/156705.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
Open Process Control
Modbus
sterownik PLC
PLC
Opis:
W artykule omówiono metodykę syntezy sprzętowej i programowej sieci sterowników PLC, opierając się na standardach OPC i Modbus. Przedstawiono fizyczną warstwę komunikacji pomiędzy sterownikami z wykorzystaniem protokołu Modbus, a następnie wyjaśniono technologię OPC i jej znaczenie w pracy z urządzeniami w relacji klient-serwer.W części końcowej przedstawiono, w jaki sposób skorzystać z biblioteki OpenOPC, tak aby móc wymieniać dane pomiędzy komputerem klasy PC i sterownikiem przemysłowym.
In this paper a methodology of the hardware and software synthesis of the PLC controllers network, based on OPC and Modbus standards, is described. The main idea is an optimization process of logical algorithms implemented in the direct digital control level using micro PLC controllers. Generally, when micro PLCs are used to control devices, there are weak opportunities to implement difficult optimization algorithms, because of the limited syntactic of the programming language and hardware limits. In such cases some supervisory system at the upper level is needed to optimize low level controllers. The authors propose using OPC technology to realize this purpose i.e. to implement an optimization application (OPC client) using a personal computer connected with low level controllers with a help of a serial RS485 network. At the beginning a logical diagram of the system. (Fig. 1) with a procedure for preparing a physical level of the PLC controllers based on RS485 standard with some Modbus implementation details in micro PLCs are described. Additionally, the physical level of communication between PLCs using Modbus (Fig. 2) protocol and the OPC technology (Fig. 3) and its importance in the interaction between devices based on the client-server relation (Figs. 4, 5) are precisely explained. In the final part of this paper a detailed example of using the developed system i.e. the way of using an OpenOPC library to prepare a communication channel and successfully exchange data between a personal computer and a master PLC controller is given and de-cribed.
Źródło:
Pomiary Automatyka Kontrola; 2012, R. 58, nr 7, 7; 602-604
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Climate evolution during the Pleniglacial and Late Glacial as recorded in quartz grain morphoscopy of fluvial to aeolian successions of the European Sand Belt
Autorzy:
Woronko, B.
Zieliński, P.
Sokołowski, R. J.
Powiązania:
https://bibliotekanauki.pl/articles/94408.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
fluvial to aeolian succession
aeolization of quartz sand grains
periglacial conditions
extraglacial zone
eolizacja ziaren piasku
piasek kwarcowy
warunki peryglacjalne
Opis:
We present results of research into fluvial to aeolian successions at four sites in the foreland of the Last Glacial Maximum, i.e., the central part of the “European Sand Belt”. These sites include dune fields on higher-lying river terraces and alluvial fans. Sediments were subjected to detailed lithofacies analyses and sampling for morphoscopic assessment of quartz grains. Based on these results, three units were identified in the sedimentary succession: fluvial, fluvio-aeolian and aeolian. Material with traces of aeolian origin predominate in these sediments and this enabled conclusions on the activity of aeolian processes during the Pleniglacial and Late Glacial, and the source of sediment supply to be drawn. Aeolian processes played a major role in the deposition of the lower portions of the fluvial and fluvio-aeolian units. Aeolian material in the fluvial unit stems from aeolian accumulation of fluvial sediments within the valley as well as particles transported by wind from beyond the valley. The fluvio-aeolian unit is composed mainly of fluvial sediments that were subject to multiple redeposition, and long-term, intensive processing in an aeolian environment. In spite of the asynchronous onset of deposition of the fluvio-aeolian unit, it is characterised by the greatest homogeneity of structural and textural characteristics. Although the aeolian unit was laid down simultaneously, it is typified by the widest range of variation in quartz morphoscopic traits. It reflects local factors, mainly the origin of the source material, rather than climate. The duration of dune-formation processes was too short to be reflected in the morphoscopy of quartz grains.
Źródło:
Geologos; 2015, 21, 2; 89-103
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
River response to climate and sea level changes during the Late Saalian/Early Eemian in northern Poland – a case study of meandering river deposits in the Chłapowo cliff section
Autorzy:
Moskalewicz, D.
Sokołowski, R. J.
Fedorowicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/94416.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
point-bar succession
meandering fluvial system
Quaternary geology
fluvial sedimentology
Eemian Sea
następstwo odsypu meandrowego
meandrujący system rzeczny
geologia czwartorzędu
sedymentologia rzeczna
morze eemskie
Opis:
Fluvial sediments in the Chłapowo cliff section were studied in order to reconstruct their palaeoflow conditions and stratigraphical position. Lithofacies, textural and palaeohydraulic analyses as well as luminescence dating were performed so as to achieve the aim of study. Sedimentary successions were identified as a record of point bar cycles. The fluvial environment probably functioned during the latest Saalian, shortly after the retreat of the Scandinavian Ice Sheet. Discharge outflow was directed to the northwest. The river used the older fluvioglacial valley and probably was directly connected to the Eem Sea. Good preservation and strong aggradation of point-bar cycles were related to a rapid relative base level rise. The meandering river sediments recognised showed responses to climate and sea level changes as illustrated by stratigraphical, morphological and sedimentological features of the strata described. The present study also revealed several insights into proper interpretation of meandering fluvial successions, in which the most important were: specific lithofacies assemblage of GSt (St, Sp) → Sl → SFrc → Fm (SFr) and related architectural elements: channel/sandy bedforms CH/SB → lateral accretion deposits LA → floodplain fines with crevasse splays FF (CS); upward-fining grain size and decreasing content of denser heavy minerals; estimated low-energy flow regime with a mean depth of 1.6–3.3 m, a Froude number of 0.2–0.4 and a sinuosity of 1.5.
Źródło:
Geologos; 2016, 22, 1; 1-14
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przegląd rozwiązań zgrabiarek podbieraczowo-taśmowych o dużych szerokościach roboczych
Overview of solutions of belt pick-up swathers with large working widths
Autorzy:
Stolarski, A.
Panasiuk, A.
Sokolowski, R.
Szczepaniak, J.
Szulc, T.
Powiązania:
https://bibliotekanauki.pl/articles/883799.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:
maszyny rolnicze
zgrabiarki podbieraczowo-przenosnikowe
szerokosc robocza
rozwiazania konstrukcyjne
pasze objetosciowe
jakosc paszy
Źródło:
Technika Rolnicza Ogrodnicza Leśna; 2017, 3
1732-1719
2719-4221
Pojawia się w:
Technika Rolnicza Ogrodnicza Leśna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Depositional conditions on an alluvial fan at the turn of the Weichselian to the Holocene – a case study in the Żmigród Basin, southwest Poland
Autorzy:
Zieliński, P.
Sokołowski, R. J.
Fedorowicz, S.
Woronko, B.
Hołub, B.
Jankowski, M.
Kuc, M.
Tracz, M.
Powiązania:
https://bibliotekanauki.pl/articles/94513.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
climate change
periglacial environment
fluvial processes
aeolian processes
luminescence dating
zmiana klimatu
środowisko peryglacjalne
procesy fluwialne
procesy eoliczne
datowanie luminescencyjne
Opis:
Presented are the results of research into the fluvio-aeolian sedimentary succession at the site of Postolin in the Żmigród Basin, southwest Poland. Based on lithofacies analysis, textural analysis, Thermoluminescence and Infrared-Optical Stimulated Luminescence dating and GIS analysis, three lithofacies units were recognised and their stratigraphic succession identified: 1) the lower unit was deposited during the Pleni-Weichselian within a sand-bed braided river functioning under permafrost conditions within the central part of the alluvial fan; 2) the middle unit is the result of aeolian deposition and fluvial redeposition on the surface of the fan during long-term permafrost and progressive decrease of humidity of the climate at the turn of the Pleni to the Late Weichselian; 3) the upper unit accumulated following the development of longitudinal dunes at the turn of the Late Weichselian to the Holocene; the development of dunes was interrupted twice by the form being stabilised by vegetation and soil development.
Źródło:
Geologos; 2016, 22, 2; 105-120
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Natural frequencies and modes shapes of two rigid bladed discs on the shaft
Autorzy:
Rządkowski, R.
Sokołowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1955709.pdf
Data publikacji:
2004
Wydawca:
Politechnika Gdańska
Tematy:
natural frequencies
bladed disc-shaft
Opis:
The dynamic behavior of a rotor consisting of two bladed discs on a solid shaft is considered. The effect of shaft flexibility on the dynamic characteristics of the bladed discs and the coupling effects between the shaft and bladed disc modes are investigated. Results presented for various cases with differing blade flexibility show clearly the coupling effects in a bladed disc-shaft system. Interference diagrams are developed, from which the dynamic behavior of a system can be predicted for differing flexibility relationships between the solid shafts and the bladed discs. In this study, the global rotating mode shapes of flexible bladed disc-shaft assemblies have been calculated. Rotational effects such as centrifugal stiffening have been accounted for, and all the possible couplings between the flexible parts have been allowed. Gyroscopic effects have been included in the shaft with two discs. Calculated natural frequencies obtained from the blade, shaft, bladed disc and shaft with two discs have been checked to determine resonance conditions and coupling effects. The calculations have shown the influence of the shaft on the natural frequencies of the bladed discs up to one nodal diameter frequencies. The torsional frequency of the shaft with two discs is coupled with the zero nodal diameter modes of the single bladed discs. The bending modes of the shaft are coupled with one nodal diameter modes of the bladed discs. It is shown that including the shaft in the bladed discs model is important from a designer's point of view and can change the spectrum of frequencies considerably.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2004, 8, 1; 51-69
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chronostratigraphy and changes of environment of Late Pleistocene and Holocene at Starunia palaeontological site and vicinity (Carpathian region, Ukraine)
Autorzy:
Sokołowski, T.
Stachowicz-Rybka, R.
Powiązania:
https://bibliotekanauki.pl/articles/191571.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Late Pleistocene
Holocene
fluvial deposits
environment
Starunia
Carpathian region
Ukraine
Opis:
This paper presents the results of absolute dating and biostratigraphical analysis carried out for alluvial sediments of an abandoned Starunia ozokerite mine located in the Velyky Lukavets River valley, in which large mammal remains were discovered in the first half of the 20th century. The sediments build up three terrace levels. The highest one, up to 8 m high (terrace II), is likely to be associated with a stage of aggradation, as well as with a short episode of valley broadening, which occurred in the Weichselian Late Pleniglacial. The lower one, 4 m high (terrace I), is most likely to be linked with the Holocene, despite a considerable transformation of its top due to mining activity. The lower part of this terrace cover bears coarse-grained channel sediments dated to 120.6-58.9 ka BP (Eemian Interglacial?-Early Pleniglacial - OIS 5e, 4 and 3), and overbank (distal floodplain) mud with intercalations of biogenic deposits (peat, peat mud and biogenic mud). The overbank deposits are dated to 48.2-11.11 ka BP (Glinde Interstadial?-Younger Dryas, OIS 3-2) and are overlain by Holocene (OIS 1) mud and biogenic deposits. In boreholes drilled in the vicinity of the present-day river channel, younger sediments occur more frequently. These include sediments originating from the Late Weichselian overlain by Holocene sediments. However, sediments originating exclusively from the Holocene are infrequent. The deposition of sediments took place in specific conditions of a permanent saturation of the environment with brine, petroleum and thickened bitumen. In the longest period of deposition (48.2-1.27 ka BP), ephemeral swamps, ponds and lakes were developed in different parts of the floodplain. They were marked by the presence of: Juncus glaucus/effusus, J. articulatus, Typha sp., Batrachium sp., Potamogeton filliformis, Bidens tripartita, Ranunculus sceleratus and Phragmites communis, as well as by halophytic species, like: Zannichellia palustris, Triglochin maritimum, Schoenoplectus tabernemontani, Puccinelia distans and Eleocharis palustris. Rhythmic oscillations between cold and warm climatic conditions, typical of the Weichselian age and well identified in Western Europe, are here marked by the changes of plant communities (woody assemblages passing into steppe and tundra), but are not noticeably recorded in the sediments of the Velyky Lukavets River. This shows that the greatest part of the discussed period involved the formation of poorly differentiated silty overbank sediments with intercalations of biogenic sediments. However, the variability of sediments provides evidence for extreme events which occurred in the Holocene.
Źródło:
Annales Societatis Geologorum Poloniae; 2009, 79, No 3; 315-331
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ zrębu zupełnego i sztucznego odnowienia sosną na skład roślinności boru świeżego w Puszczy Białowieskiej
The effect of clear cutting and artificial regeneration with pine on species composition of fresh coniferous stands in the Bialowieza Primeval Forest
Autorzy:
Sokołowski, A.W.
Paluch, R.
Powiązania:
https://bibliotekanauki.pl/articles/1018579.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
odnowienia sztuczne
roslinnosc
sklad gatunkowy
odnowienia lasu
bor swiezy
lesnictwo
zrab zupelny
Puszcza Bialowieska
bor brusznicowy
fresh coniferous vaccinio vitis−idaeae – pinetum association
clear cutting
ecological indicator value
Opis:
The paper discusses the impact of clear−cutting and artificial regeneration on species composition of the fresh coniferous Vaccinio vitis−idaeae – Pinetum association Sokoł. 1981. The studies were conducted in the maturing artificially established stands (of 55−77 years) and 150−180 year−old natural old−growth stands in the Polish and Belarusian part of the Białowieża Primeval Forest. No quantitative and qualitative differences were found in species composition and structure between the two groups of stands. The lack of significant differences between the two development stages was ascertained using ecological indicator values. In the maturing stands the non−forest species were not found, and all species (so−called euphytes??), characteristic of the Vaccinio vitis−idaeae – Pinetum association, were already present there. This means that the use of a clear cutting system emulating the catastrophic natural disturbance pattern of forest dynamics in this association did not entail permanent changes in the ground vegetation.
Źródło:
Sylwan; 2006, 150, 10; 12-19
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ sztucznego odnawiania drzewostanów w borze mieszanym na skład zbiorowisk leśnych w Wigierskim Parku Narodowym
The effect of artificial stand regeneration in the mixed coniferous forest on the composition of forest communities in Wigry National Park
Autorzy:
Sokołowski, A.W.
Paluch, R.
Powiązania:
https://bibliotekanauki.pl/articles/1024065.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
zmiany skladu gatunkowego
zrab zupelny
bor mieszany swiezy
odnowienia sztuczne
Wigierski Park Narodowy
oddzialywanie na srodowisko
odnowienia lasu
zbiorowiska lesne
parki narodowe
lesnictwo
artificial regeneration of stands with pine
clear−cut
reed−bed – spruce mixed coniferous association
deterioration
Opis:
The paper presents the effect of artificial regeneration of stands with pine on a clear−cut area on the species composition of Calamagrostio−Piceetum association of reed−bed – spruce mixed coniferous stands frequently occurring in the Wigry National Park. The studies were carried out in two groups of pine stands: the old−growth stand at the age of 130−150 years, possibly established by way of natural regeneration and young−growth stands established by planting pine on clear−cut areas. Using traditional methods of phytosociological analysis no significant qualitative differences were found between the herbaceous vegetation of the both stands.
Źródło:
Sylwan; 2004, 148, 12; 48-57
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical and Experimental Research on Stab Resistance of a Body Armour Package
Numeryczne i doświadczalne badania nożo-odporności ochronnego pakietu balistycznego
Autorzy:
Barnat, W
Sokołowski, D
Gieleta, R
Powiązania:
https://bibliotekanauki.pl/articles/233620.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
numerical model
dry fabric
aramid fabric
stab resistance
body armour
kamizelka ochronna
model numeryczny
odporność na przekłucie
ochronny pakiet balistyczny
Opis:
In this paper the issue of the stab resistance of a ballistic package is addressed. Emphasis was placed on this issue because most modern vests are designed to meet the threat posed by firearms only. Neglect of protection against melee attacks was also observed. Thus there is a need to develop research methodology for this area, also because it is a valid and necessary problem to be addressed in a modern, developed society. The aim of this study was to create a numerical model which simulated the phenomenon of ballistic package penetration by a test blade. The specification of the test blade was taken from NIJ Standard-0115.00. During the research, stab resistance tests on dry Twaron T750 fabric was carried out on a drop test machine. The test was filmed with a Phantom V12 high-speed camera. A numerical model of the fabric architecture was prepared using commercial LSDYNA software. The numerical model represents the whole research area according to NIJ Standard-0115.00. As backing material, ROMA 1° ballistic clay was used.
Artykuł porusza zagadnienie nożo-odporności pakietów balistycznych stosowanych w kamizelkach ochronnych. Nacisk został położony na to zagadnienie, ponieważ większość nowoczesnych kamizelek zostało zaprojektowane do ochronny przed bronią palną. Zaniedbując ochronę przed atakiem przy użyciu broni białej. Istnieje więc potrzeba wypracowania metodologii w tym zakresie, ponieważ jest to problem ważny w nowoczesnym i rozwiniętym społeczeństwie. Celem badań było wypracowanie modelu numerycznego, który wiernie symuluje zjawisko przebicia pakietu balistycznego przez nóż testowy. Specyfikacja noża testowego została zapożyczona z normy NIJ Standard-0115.00. W trakcie badań zostały przeprowadzone testy nożo-odporności nieprzesyconej tkaniny Twaron T750 przy użyciu kolumny zrzutowej. Testy zostały sfilmowane przy użyciu super szybkiej kamery Phantom V12. Do stworzenia modelu numerycznego tkaniny i późniejszych obliczeń zostały wykorzystane komercyjne oprogramowania LS-DYNA. Model numeryczny odzwierciedlał całą przestrzeń pomiarową zgodnie z normą NIJ Standard-0115.00. Jako podłoża użyto plasteliny balistycznej ROMA 1°.
Źródło:
Fibres & Textiles in Eastern Europe; 2014, 6 (108); 90-96
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Frequencies and modes of rotating flexible shrouded bladed discs-shaft assemblies
Autorzy:
Sokołowski, J.
Rządkowski, R.
Kwapisz, L.
Powiązania:
https://bibliotekanauki.pl/articles/1954654.pdf
Data publikacji:
2003
Wydawca:
Politechnika Gdańska
Tematy:
blades
discs
shaft
free vibration
Opis:
It is now increasingly necessary to predict accurately, at the design stage and without excessive computing costs, the dynamic behaviour of rotating parts of turbomachines, so that resonant conditions at operating speeds are avoided. In this study, global rotating mode shapes of flexible shrouded bladed disc-shaft assemblies are calculated. The rotating modes have been calculated by using a finite element cyclic symmetry approach. Rotational effects, such as centrifugal stiffening have been accounted for, and all the possible couplings between the flexible parts have been allowed. Gyroscopic effects have been neglected. The numerical results have been compared with the experimental. The calculations show the influence of shaft flexibility on the natural frequencies of shrouded bladed discs up to four nodal diameters for the two first frequencies series.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2003, 7, 2; 215-231
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Czynniki kształtujące zasoby i chemizm wód podziemnych w rejonie aglomeracji gdańskiej
Factors affecting resources and chemistry of groundwater in the Gdańsk agglomeration area
Autorzy:
Lidzbarski, M.
Sokołowski, K.
Warumzer, R.
Powiązania:
https://bibliotekanauki.pl/articles/2075480.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
chemizm wód podziemnych
wody podziemne aglomeracji Gdańskiej
podatność wód podziemnych
chemistry and groundwater resources
groundwater in the Gdańsk agglomeration
groundwater vulnerability
Opis:
The purpose of this article is to identify the main factors influencing groundwater resources and chemistry in the area of the Gdańsk agglomeration. Two groups of factors were identified: natural – including physico-geographical location, geological structure and hydrogeological conditions and also anthropogenic impact. The studied area is located within a few morphological units: Kashubian Lakeland, Coastal Terrace and Żuławy Gdańskie (Gdańsk Delta Plain). Each of the above unit is characterized by diverse geological structure and lithology of sediments, which in turn affects the diversity of hydrogeological conditions of multiaquifer formations from Pleistocene to the Upper Cretaceous. Groundwater circulation system includes so-called Gdańsk aquifer system. The main recharge area of covers the Kashubian Lakeland. The discharge zone ncludes Coastal Terrace and Żuławy Gdańskie. The aquifers are confined to varying degree which has a direct impact on the rate of contaminants migration. Anthropogenic pollutions are induced by: industry, transport, development and intensive exploitation of groundwater resources. The geogenic risks that affect aquifers in of the Gdańsk agglomeration are: salt water intrusion, brines ascent and fluoride hydrogeochemical anomaly in water from the Upper Cretaceous aquifer in Żulawy Gdańskie.
Źródło:
Przegląd Geologiczny; 2016, 64, 6; 389--398
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The model of managerial decisions’ support in the process of choosing an Internet shop application
Model wspomagania decyzji menedżerskich w procesie wyboru aplikacji sklepu internetowego
Autorzy:
Wrzalik, A.
Niedbał, R.
Sokołowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/406134.pdf
Data publikacji:
2015
Wydawca:
Politechnika Częstochowska
Tematy:
Internet shop application
hierarchical model
AHP method
aplikacja sklepu internetowego
model hierarchiczny
metoda AHP
Opis:
The paper presents the problem field regarding the choice of an Internet shop application. In this context it presents the methodology of defining the decision problem on the basis of the hierarchical structure. In the course of the analyzed issue a multi-criteria Analytic Hierarchy Process (AHP) method was applied. The decision alternatives of Internet shop application’s choice were: free application, dedicated application, commercial application and application in the SaaS model. For such defined solutions, the Authors created a decision model described by criteria and sub-criteria groups. The pair comparisons of individual elements allowed choosing the most optimal variant – the commercial application.
W opracowaniu przedstawiono obszar problemowy związany w wyborem aplikacji sklepu internetowego. W tym kontekście zaprezentowano metodologię definiowania problemu decyzyjnego w oparciu o strukturę hierarchiczną. W toku analizowanego zagadnienia zastosowano wielokryterialną metodę hierarchicznej analizy problemów decyzyjnych – AHP. Wariantami decyzyjnymi wyboru aplikacji sklepu internetowego były: aplikacja bezpłatna, aplikacja dedykowana, aplikacja komercyjna, aplikacja w modelu SaaS. Dla tak określonych rozwiązań stworzono model decyzyjny opisany grupami kryteriów i subkryteriów. Przeprowadzone porównania parami poszczególnych elementów pozwoliły na wybór optymalnego wariantu – aplikacji komercyjnej.
Źródło:
Polish Journal of Management Studies; 2015, 12, 2; 202-211
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 28

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