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Search results for: MIKRO CHP
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Micro and Macroelements in Honey and Atmospheric Pollution (NW and Central Poland)
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A Method and Device for 3D Recognition of Cutting Edge Micro Geometry
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Modeling of textural anisotropy in granular materials with micro-polar hypoplasticity
PublicationW artykule przedstawiono wyniki numerycznej wpływu anizotropii strukturalnej w materiałach granulowanych na powstawanie lokalizacji odkształceń. Obliczenia wykonano dla ściskania w płaskim stanie odkształcenia stosując metodę elementów skończonych na bazie mikropolarnego prawa hipoplastycznego. Wpływ anizotropii modelowano stosując skorelowane pola początkowego wskaźnika porowatości.
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Tesla Friction-Type Micro Turbine For Small-Scale Cogeneration
PublicationTesla turbine is rarely used in professional power installations due to its specific work characteristics and relatively low internal efficiency. However, it has some potential to be applied in micro-power plants operating in distributed co-generation systems, also working in an organic Rankine cycle. This paper presents results from numerical calculations of flow in three models of Tesla disk turbines assuming nitrogen as a working...
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On time-dependent nonlinear dynamic response of micro-elastic solids
PublicationA new approach to the mechanical response of micro-mechanic problems is presented using the modified couple stress theory. This model captured micro-turns due to micro-particles' rotations which could be essential for microstructural materials and/or at small scales. In a micro media based on the small rotations, sub-particles can also turn except the whole domain rotation. However, this framework is competent for a static medium....
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A study of a reduction of a micro- and nanometric bismuth oxide in hydrogen atmosphere
PublicationA reduction of bismuth oxide in hydrogen atmosphere was investigated. The reaction was performed with a material in various structural forms: powder: with micrometric grains, powder with nanometric grains and powder pressed into pellets. The process was performed in both isothermal and non-isothermal conditions. An activation energy of the reaction calculated with Friedman method was found to be about 85 kJ/mol for the reduction...
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Growth Orientation and the Profile of Micro-Entrepreneurs From the Pomorskie Province
PublicationThe article begins with the presentation of the concept of Entrepreneurial Orientation. Entrepreneurial Orientation assumes that some enterprises, regardless of size, behave in an entrepreneurial way and are proactive, innovative and willing to take risks. The relationships between Entrepreneurial Orientation and the results of enterprises are also subject to research, although its results are not clear – mainly due to the different...
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Very high altitude micro air vehicle deployment method
PublicationThe paper presents the original work and method for high altitude micro air vehicle deployment. The method is based on the scientific ballooning, and adapted for stratospheric flight of commercial off-the-shelf micro air vehicle in flying wing configuration. The High Altitude Micro Air Vehicle, built for this research, was deployed during a test experiment at the lower level of the stratosphere. The results of the experiment and...
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Discrete Modelling of Micro-structural Phenomena in Granular Shear Zones
PublicationThe micro-structure evolution in shear zones in cohesionless sand for quasi-static problems was analyzed with a discrete element method (DEM). The passive sand failure for a very rought retaining wall undergoing horizontal translation towards the sand backfill was discussed. To simulate the behaviour of sand, the spherical discrete element model was used with elements in the form of rigid spheres with contacts moments.
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Discrete analysis of micro-structural events in granular shear zones
PublicationW artykule pokazano rozwój różnych zjawisk mikrostrukturalnych na poziomie ziarna podczas parcia pasywnego piasku na sztywną ściankę przemieszczającą się poziomo. Obliczenia wykonano stosując metodę DEM. Wyniki na poziomie globalnym porównano z wynikami MES. Szczególna uwagę zwrócono na rozwój łańcuchów sił miedzy ziarnami.
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Study of some micro-structural phenomena in granular shear zones
PublicationW artykule pokazano wyniki dyskretne zachowania się ziaren materiałów granulowanych w strefie ścinania uzyskane metodą DEM. Wyniki porównano z wynikami MES na bazie mikropolarnego hipoplastycznego prawa konstytutywnego. Szczególną uwagę zwrócono w obliczeniach na zjawiska mikrostrukturalne w strefie ścinania takie jak: wiry, łańcuchy sił, lokalne zmiany porowatości.
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Mariusz Deja dr hab. inż.
PeopleAssistant Professor in the Department of Manufacturing Engineering and Automation. He graduated in 1993, obtaining Master degree at the Faculty of Mechanical Engineering, Gdańsk University of Technology in the field of study: Mechanical Engineering, specialization: Technological Process Design. After graduation he worked for the Department of Manufacturing Engineering and Automation and his main research area was associated with...
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CYP3A4 overexpression enhances the cytotoxicity of the antitumor triazoloacridinone derivative C-1305 in CHO cells
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Affymetrix Chip Definition Files Construction Based on Custom Probe Set Annotation Database
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CYP3A4 overexpressin enhances the cytotoxicity of the antitumor triazoloacridinone derivative C-1305 in CHO cells
PublicationW pracy badano wpływ nadekspresji izoenzymu CYP3A4 na cytotoksyczność i odpowiedź komórkową indukowaną przez przeciwnowotworową pochodną triazoloakrydonu w modelowym układzie komórek CHO: dzikego typu, z nadekspresją reduktazy cytochromu P450 (CHO-HR) oraz z koekspresją reduktazy i izoenzymu CYP3A4 (CHO-HR-3A4). Wykazano, że komórki CHO wykazywały różną wrażliwość na badany związek, a linia CHO-HR okazała się najbardziej wrażliwa,...
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Zastosowanie metody AHP do porównania kryteriów wyboru lokalizacji budowy farmy wiatrowej
PublicationArtykuł przedstawia opis oraz porównanie kryteriów wyboru lokalizacji farmy wiatrowej. Kryteria te uwzględniają pomiary wietrzności na rozpatrywanym terenie, lokalizację turbin wiatrowych, lokalizację linii elektroenergetycznej służącej do przesyłu wyprodukowanej energii elektrycznej od farmy wiatrowej do stacji elektroenergetycznej (GPZ), infrastrukturę towarzyszącą, warunki techniczne przyłączenia do sieci elektroenergetycznej...
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Subjective Preferences Towards Various Conditions of Self-Administered Questionnaires: AHP and Conjoint Analyses
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Zastosowanie metody AHP do porównania kryteriów wyboru lokalizacji budowy farmy wiatrowej
PublicationW artykule przedstawiono opis oraz porównanie kryteriów wyboru lokalizacji farmy wiatrowej. Kryteria te uwzględniają pomiary wietrzności na rozpatrywanym terenie, lokalizację turbin wiatrowych, lokalizację linii elektroenergetycznej służącej do przesyłu wyprodukowanej energii elektrycznej od farmy wiatrowej do stacji elektroenergetycznej (GPZ), infrastrukturę towarzyszącą, warunki techniczne przyłączenia do sieci elektroenergetycznej...
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Sample processing for DNA chip array-based analysis of enterohemorrhagic Escherichia coli (EHEC)
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Anode supported single chamber solid oxide fuel cell in CH4-Air Mixture.
PublicationW tej pracy przedstawiono wyniki prac ogniw paliwowych na bazie elektrolitu z tlenku cyrkonu stabilizowanego itrem o grubości 1-2um wytworzonego na podłożu cermetu z tlenku niklu i tlenku cyrkonu stabilizowanego itrem. LSCF był wykorzystany jako katoda. Ogniwo paliwowe było testowane w konfiguracji jednokomorowej w mieszaninie powietrza i metanu. Uzyskano napięcie o wartości 0.8V, zaś moc wynosiła 0.12W/cm2. Zbdadano wpływ przepływu...
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Uogólniona metoda agregacji w sensie AHP w analizie ryzyka systemów technicznych.
PublicationPrzedstawiono problematykę badawczą związaną z uwzględnieniem czynników wpływu w ocenie bezpieczeństwa oraz jakościowej i ilościowej analizie ryzyka systemów technicznych. Podkreśla się znaczenie oceny czynników środowiskowych, ludzkich i organizacyjnych w procesie analizy ryzyka i podejmowania decyzji. Proponowana metoda stosowania HID (hierarchical influence diagrams)wspomagająca analizę i szeregowanie opcji sterowania...
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Application in circular sawing machines of the experimental results of investigations of the chip removing system operation
PublicationThe experimental results of the chip removing system operation are presented. The main aim of them was to optimize suction system of the panel saw Fx3 and its follower Fx550. The attention was focused on the upper casing, which was the part of removing system. Within the framework of the work a systematic experimental study of pressure distribution in the casing during operation of the selected rotational speed of saw blade with...
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Cross sections calculations for electron scattering from dimethylamine, NH(CH3)2, molecule
PublicationThe total cross section for single electron-impact ionization and the integral elastic cross section for electron scattering from dimethylamine have been calculated using the binary-encounter-Bethe model and the independent atom method, respectively.
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Towards Knowledge Formalization and Sharing in a Cognitive Vision Platform for Hazard Control (CVP-HC)
PublicationHazards are present in all workplaces and can result in serious injuries, short and long-term illnesses, or death. In this context, management of safety is essential to ensure the occupational health of workers. Aiming to assist the safety manage-ment process, especially in industrial environments, a Cognitive Vision Platform for Hazard Control (CVP-HC) has been proposed. The CVP-HC is a scalable yet adaptable system capable of...
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Determinants of the primary stability of cementless acetabular cup implants: A 3D finite element study
PublicationPrimary stability of cementless implants is crucial for the surgical success and long–term stability. However, primary stability is difficult to quantify in vivo and the biomechanical phenomena occurring during the press–fit insertion of an acetabular cup (AC) implant are still poorly understood. The aim of this study is to investigate the influence of the cortical and trabecular bone Young's moduli Ec and Et, the interference...
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Design and thermodynamic analysis of an H2O–LiBr AHP system for naval surface ship application
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LAB ON A CHIP
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Gradient theories of ductile and brittle damage: a thermodynamical consistent framework and computational issues
PublicationPrzedstawiono termodynamicznie zgodny opis gradientowych teorii plastycznego i kruchego zniszczenia. Przyjęto, że propagujące mikro-zniszczenia posiadają bezwładność i ich ruch jest wywołany przez mikro-siły, które spełniają ich własne dynamiczne równania równowagi. Poza równaniami równowagi makro- i mikro-sił sformułowano pierwsze i drugie prawo termodynamiki na poziomie mikro i mezo. Zakładając ogólną formę równań konstytutywnych...
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Low-power device simulator for micro-energy measurement methods testing
PublicationThe paper presents low-power device simulator designed for testing of micro-energy measurement methods. Such kind methods can be used for evaluation of power systems based on Energy Harvesting. The device allows to set the current consumption characteristic over the time, thus making possible playing the role of different types of low-power devices e.g. simulating sensor network node.
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Analysing selection of low-temperature medium for cogeneration micro power plant
PublicationThe article analyses the ORC system working with dry and wet low-boiling media which are most frequently used in installations of this type. Two types of cycles were examined, which were the cycle with heat regeneration for dry media: fc72, hfe7100, R227ea, R245fa, R423a and R600a, and the cycle without heat regeneration for wet media: R11, R12, R134a, R718 and 507a. The calculations were performed for the assumed required thermal...
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Analysing selection of low-temperature medium for cogeneration micro power plant
PublicationThe article analyses the ORC system working with dry and wet low-boiling media which are most frequently used in installations of this type. Two types of cycles were examined, which were the cycle with heat regeneration for dry media: fc72, hfe7100, R227ea, R245fa, R423a and R600a, and the cycle without heat regeneration for wet media: R11, R12, R134a, R718 and 507a. The calculations were performed for the assumed required thermal...
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An Approach for Journal Summarization Using Clustering Based Micro-Summary Generation
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Design analysis of Tesla micro-turbine operating on a low-boiling medium
PublicationThis paper presents results of the design analysis of a Tesla bladeless turbine intended for a co-generating micro-power plantof heat capacity 20 kW, which operates in an organic Rankine cycle on a low-boiling medium. Numerical calculations of flowin several Tesla turbine models were performed for a range of design parameters. Results of investigations exhibit interestingfeatures in the distribution of flow parameters within the...
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Cogenerative micro power plants - a new direction for development of power engineering?
PublicationW pracy przedstawiono rozważania dotyczące perspektywy mikrosiłowni domowych w gospodarce rozproszonej. Przedstawiono oryginalne kryterium doboru czynnika roboczego w mikrosiłowni oraz przedstawiono sprawności cieplne i egzergetyczne obiegów Clausiusa-Rankina realizujących pracę mikrosiłowni.
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GVC involvement and the gender wage gap: Micro -evidence on European countries
PublicationWe examine linkages between involvement in global value chains (GVCs) and gender wage inequalities. We use merged data from Structure of Earnings Survey and the World Input Output Database covering 18 European countries. We employ information on employees’ personal and company characteristics and a sectoral involvement in GVCs. In general, the wages of workers from sectors more involved in GVCs are lower. However, the relationship...
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Evaluation of the Macro- and Micro-Economic Factors Affecting the Financial Energy of Households
PublicationThis paper is an evaluation of the common macro-economic, micro-economic, and social factors affecting households’ financial situations. Moreover, the author’s objective was to develop a fuzzy logic model for forecasting fluctuations in the number of nonperforming consumer loans in a country using the example of Poland. This study represents one of the first attempts in the global literature to develop such a forecasting model...
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Enhanced energy conversion as a result of fluid-solid interaction in micro- and nanoscale
PublicationIt is known that nano- and micromechanics require new approaches to right describing of surface-like phenomena which lead to an enhanced energy conversion. In this work, a general form of surface forces that consist of a contribution from both the friction and mobility components has been extended to collect the effects of bulk and surface motion of a fluid. Quite similar impact can be observed for a solid-fluid mixture, where...
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Performance of the domestic micro ORC equipped with the shell-and-tube condenser with minichannels
PublicationIn this paper, the original compact shell-and-tube heat exchanger with circular minichannels of in-house design and manufacturing is presented as the condenser for the domestic micro heat and power plant investigations as well as other future technical applications. The heat exchanger is equipped with turbulizing baffles inside the shell. The shell itself is made of a tubular sleeve having an inner diameter of 0.067 m and the length...
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Special techniques and future perspectives: Simultaneous macro- and micro-electrode recordings
PublicationThere are many approaches to studying the inner workings of the brain and its highly interconnected circuits. One can look at the global activity in different brain structures using non-invasive technologies like positron emission tomography (PET) or functional magnetic resonance imaging (fMRI), which measure physiological changes, e.g. in the glucose uptake or blood flow. These can be very effectively used to localize active patches...
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Growth Orientation of Women and Men Owners of Micro Firms in the Pomerianian Region
PublicationDespite the fact that research on women’s entrepreneurship has been conducted for many years, still many clear answers to questions about the differences between entrepreneurs of both genders are missing. One of the unresolved issues is the performance of women in entrepreneurship. The aim of the study is to investigate the growth orientation of microenterprises operating in the Pomeranian region in Poland and to compare its level...
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MicroGal Gravity Measurements with MGS-6 Micro-g LaCoste Gravimeter
PublicationKnowing the exact number of fruit and trees helps growers to make better decisions about how to manage their production in the orchard and prevent plant diseases. The current practice of yield estimation is to manually count fruit or flowers (before harvesting), which is a very time-consuming and costly process. Moreover it’s not practical for large orchards. It also doesn’t allow to make predictions of plant development in a more...
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High-efficiency mini and micro heat exchangers for dispersed power generation
PublicationTaking into account the dispersed systems technologies and their development, the ORC systems seem to be promising technology amongst various micro-CHP domestic units (electrical power production below 10 kWe), however practical realization of the ORC cycle in a micro-scale is technically challenging. The system consists in devices such as the vapour generation unit (boiler), expansion device and heat exchangers. Each of them should...
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Investigations of micro-structure evolution in granular shear zones using DEM.
PublicationW artykule pokazano rozwój różnych zjawisk mikrostrukturalnych na poziomie ziarna podczas parcia piasku na sztywną ściankę przemieszczającą się poziomo. Obliczenia wykonano stosując metodę DEM. Wyniki na poziomie globalnym porównano z wynikami doświadczalnymi i wynikami MES. Szczególna uwagę zwrócono na rozwój wirów w strefach ścinania.
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Size effects in problems of footings on sand within micro-polar hypoplasticity.
PublicationW artykule przedstawiono obliczenia efektów skali na nośność fundamentu na piasku. Obliczenia wykonano przy pomocy mikropolarnego prawa hipoplastycznego. W obliczeniach wykorzystano stochastyczne rozkłady początkowego wskaźnika porowatości według rozkładu Gaussa oraz różne wymiary fundamentu.
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Modeling of textural anisotropy in granular materials with stochastic micro-polar hypoplasticity.
PublicationW artykule przedstawiono wyniki numerycznej wpływu anizotropii strukturalnej w materiałach granulowanych na powstawanie lokalizacji odkształceń. Obliczenia wykonano dla ściskania w płaskim stanie odkształcenia stosując metodę elementów skończonych na bazie mikropolarnego prawa hipoplastycznego. Wpływ anizotropii modelowano stosując skorelowane pola początkowego wskaźnika porowatości.
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The Korean journal of gastroenterology = Taehan Sohwagi Hakhoe chi
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Non-coaxiality and stress-dilatancy rule in granular materials: FE-investigation within micro-polar hypoplasticity
PublicationW artykule przedstawiono wyniki numerycznej analizy nieosiowości i zasady naprężenie-dylatancja w materiałach granulowanych podczas ściskania dwuosiowego. Obliczenia wykonano przy zastosowaniu metody elementów skończonych i mikropolarnego modelu hipoplastycznego.
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Premature cardiovascular mortality in lymphoma patients treated with (R)-CHOP regimen — A national multicenter study
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BHP w bibliotekach – analiza zasobów bibliograficznych baz WoS CC, Scopus i LISTA
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Serum levels of IL-6, IL-8 and CRP as prognostic factors in epithelial ovarian cancer
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