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Wyszukujesz frazę "core" wg kryterium: Temat


Tytuł:
Examinations of parameters influencing the outflow of two phase air-sand stream from machine chamber and core box filling in shooting process
Badania parametrów wpływających na wypływ dwufazowego strumienia piaskowo-powietrznego z komory nabojowej i wypełnienie rdzennicy w procesie dmuchowym
Autorzy:
Fedoryszyn, A.
Dańko, R.
Powiązania:
https://bibliotekanauki.pl/articles/356971.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
core production
core shooting
core blowing
rdzennice
strzelarka
nadmuchiwarka
Opis:
The study investigates the key aspects involved in the flow of the air-sand stream from the machine chamber and in the core box filling in the core shooting and core blowing processes. The prevailing tendency to manufacture thin-walled castings with intricate channel structures has become the major determinant of castings quality and production rates. An important parameter of most core sand used in the shooting processes is the ability to eject from the machine chamber and the core-box filling capability. These properties are the key factors determining the feasibility of manufacturing intricate cores and the process efficiency. The research work outlined in this study focuses on establishing the performance criteria of core sand ejection from the machine chamber and of core box filling and sand compaction. The results given below were obtained for several new-generation core sand types, containing organic and inorganic binders, and designed to be used in hot-box, warm box and warm air processes.
W publikacji przedstawiono zagadnienia związane z wypływem strumienia piaskowo-powietrznego z komory nabojowej i zapełnianiem rdzennicy metodami dmuchowymi z wykorzystaniem strzelarek i nadmuchiwarek. Tendencja do konstrukcji odlewów o coraz cieńszych ściankach i skomplikowanych kanałach, sprawia, że produkcja wysokiej jakości rdzeni jest nadal czynnikiem determinujacym jakość oraz wydajność produkcji odlewów. Ważnymi właściwościami ogółu mas rdzeniowych stosowanych w procesach dmuchowych jest ewakuacja masy z komory nabojowej maszyny dmuchowej oraz zdolność do zapełniania i zagęszczania masy w rdzennicy. Właściwości te, decydują często o możliwosci wykonania skomplikowanych rdzeni oraz o efektywności procesu technologicznego. Przedstawione badania dotyczą ustalenia kryteriów oceny ewakuacji masy z komory nabojowej oraz zdolność do wypełniania rdzennicy i zagęszczania kilku nowoczesnych mas formierskich, zarówno organicznych jak i nieorganicznych, pochodzących technologii hot box, warm box, warm air.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 3; 903-906
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies of the Influence of the Number and Distribution of Vents on the Production Process of Cores by the Blowing Method
Autorzy:
Dańko, R.
Powiązania:
https://bibliotekanauki.pl/articles/352765.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
core shooter
core sands
blowing method
Opis:
The results of studies of the cores production by blowing methods with utilising the modified experimental shooting machine SR-3D, are provided in the hereby paper. The core sands from the Cordis technology were applied in the presented investigations. The influence of the number and distribution of vents on the shaped core box filling, filmed by a digital camera, was determined. Investigations were performed for the shooting pressures of 0.4, 0.5 and 0.6 MPa and for three surfaces of the shooting hole, at various numbers and distribution ways of vents in the experimental core box. The selected results of the model investigations were compared with the results of simulations performed previously in the PROCAST programme. The intensity of the core sand outflow from the shooting chamber into the core box of the experimental shooting machine was measured. Technological effects were assessed on the basis of the core sand apparent density in individual parts of the core, in dependence on the character of the pressure increase in the shooting chamber and the pressure value obtained in the core box.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 1; 105-111
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Compaction of Cores Made by Blowing Methods – Model Investigations
Autorzy:
Dańko, R.
Powiązania:
https://bibliotekanauki.pl/articles/380080.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
core shooting
blowing process
core sand
core box
rdzeń wstrzeliwany
masa rdzeniowa
rdzeń odlewniczy
Opis:
The results of model investigations of the influence of the blowing process selected parameters on the distribution of the compaction of the core made by the blowing method, are presented in the hereby paper. These parameters were: shooting pressure, shooting hole diameter, amount and distribution of deaerating holes. Investigations were performed using the horizontal core box of the cuboidal cavity and the same core box into which inner inserts were introduced. These inserts were dividing the primary volume into three sectors differing in their direction, introduction conditions and the character of the core sand flow. As the compaction measure the apparent sand density was assumed. The density was determined in five measuring points in case of uniform cores, and in three measuring points in case of cores obtained in the core box with three separated sectors. The apparent density of the compacted core sand in the core box cavity was determined on the basis of the measurements of masses and volumes of samples cut-out from the determined core places by means of the measuring probe. Investigations were performed at three values of the working pressure equal 0.4, 0.5 and 0.6MPa for two diameters of the shooting hole: 10 and 20 mm. During tests the core box deaeration, controlled by an activisation of the determined number of deaerating vents placed in the core box, was also subjected to changes.
Źródło:
Archives of Foundry Engineering; 2018, 18, 2; 191-197
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Density Distribution and Resin Migration Investigations in Samples of Sand Core Made by Blowing Method
Autorzy:
Dańko, R.
Jamrozowicz, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/106993.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
core shooting
core blowing
molding sand
resin migration
Opis:
Resin migration in a core can occur during the core production process performed by blowing methods in which the core sand is transported into the core box as a two-phase sand-air flux characterized by various working parameters (working pressure, shooting time, volumetric concentration). This migration is the result of the resin being blown off from the matrix grain surfaces by compressed air. The methodology of the investigation of this effect developed at AGH University of Science and Technology is presented in this paper. The results of the resin migration tests obtained for cores made with cold-box technology at various working parameters of the shooting process are also shown.
Źródło:
Journal of Casting & Materials Engineering; 2017, 1, 3; 70-73
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of the Mechanism of the Sand Shooting into the Core Box
Autorzy:
Dańko, R.
Powiązania:
https://bibliotekanauki.pl/articles/379842.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
core
core box
sand shooting
deaerating
rdzeń
rdzenie skrzynkowe
piaskowanie
odpowietrzanie
Opis:
The results of investigations of sand shooting into the core box are presented in the hereby paper. The investigations concern the formation of the diphase sand-air flux, its motion, flowing and compaction in the cavity during the core forming. Conditions deciding on the course of individual phases of the process are discussed with taking into consideration the influence of such factors as: the shot pressure, shooting hole diameter, number and distribution of deaerating vents in experimental core boxes (of a single cavity and of multi cavities) on the core sand compaction state. Investigations were performed by means of the modernised experimental shooting machine SR-3D, of the shooting chamber volume of 3.3 dm3, connected with the system of pneumatic supply ensuring the stable pressure supply of values: 0.4 MPa, 0.5 MPa and 0.6 MPa. Two diameters of the shooting hole, equal 10 mm and 20 mm, were applied for filling three experimental core boxes differing in dimensions of cavities and in number and distribution of deaerating vents. The filling process of core boxes was recorded by means of the digital camera PHANTOM V210 with the filming rate of 3000 pictures in second. Simultaneously, during the shot, other values allowing to determine the intensity of the core sand outflow from the shooting chamber to the core box, were tested. The presented in this publication results constitute the important element of the experimental verification of the blowing process simulation calculations which will be performed.
Źródło:
Archives of Foundry Engineering; 2018, 18, 3; 113-119
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Core Sands Properties in Blowing Process
Autorzy:
Dańko, R.
Powiązania:
https://bibliotekanauki.pl/articles/381670.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry
core
blowing process
core sand
odlewnictwo
rdzeń odlewniczy
masa rdzeniowa
Opis:
The effects of filling the core box cavity and sand compaction in processes of core production by blowing methods (blowing, shooting) depend on several main factors. The most important are: geometrical parameters of cavity and complexity of its shape, number, distribution and shape of blowing holes feeding sands as well as the venting of a technological cavity. Values of individual parameters are selected according to various criteria, but mostly they should be adjusted to properties of the applied core sand. Various methods developed by several researchers, including the authors own attempts, allow to assess core sands properties on the basis of special technological tests projecting the process into a laboratory scale. The developed criteria defining a degree or a filling ability factor provide a better possibility of assessing the core sand behaviour during flowing and core box filling, which indicate the value and structure of the obtained compacting decisive – after hardening – for strength and permeability. The mentioned above aspects are analysed – on the basis of authors’ own examinations - in the hereby paper.
Źródło:
Archives of Foundry Engineering; 2015, 15, 2 spec.; 13-16
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficacy of Exercise Protocols on Balance in Badminton Players -A Systematic Review & Meta-Analysis
Autorzy:
Indora, Nitin Kumar
Manoj, Malik
Jaspreet, Kaur
Powiązania:
https://bibliotekanauki.pl/articles/2170348.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:
badminton
core stability training
Pilates
Plyometric
Swiss ball
core strengthening
balance
Opis:
Objective. the goal of this “systematic review” and meta-analysis is to find out the efficacy of exercise regimes on balance in badminton players. Study design. Systematic review and meta-analysis. data Source. Pub Med, “Cochrane database (Cochrane Central register of controlled Trials)”, google Scholar, Springer, and DoAJ. Eligibility criteria. limits were applied to database searches to identify papers published in English and only human studies were included. results. result of Meta – analysis was statistically significant in “anterior component of Y-balance test” (MD = 2.39, 95% ci = 1.90, 2.89; “p ≤ 0.00001”) with low heterogeneity (i² = 0%, p < 0.41). There was statistically significant improvement in postero-medial component of y- balance (MD = 2.87, 95% ci = 0.55, 5.19; p ≤ 0.02) with “moderate heterogeneity” (i² = 39%, p < 0.19). result showed statistically significant improvement in postero-lateral component of y- balance test (MD = 3.09, 95% ci = 0.64, 5.65; p ≤ 0.02) with “moderate heterogeneity (i² = 38%, p < 0.20)”. There was “statistically significant “improvement in overall balance of y-balance test in “experimental group as compared to control group (MD = 8.49, 95% ci = 4.62,12.36; p ≤ 0.0001) with low heterogeneity (i² = 0%, P < 0.47)”. Conclusion. this systematic and meta-analysis concluded that various exercise protocols may result in improvement in the balance of badminton players. PrOSPErO registration number: crD42020193620.
Źródło:
Central European Journal of Sport Sciences and Medicine; 2022, 40; 61-76
2300-9705
2353-2807
Pojawia się w:
Central European Journal of Sport Sciences and Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rola kluczowych kompetencji organizacji w realizacji strategii biznesu
The role of core competencies of the organization in business strategy implementation process
Autorzy:
Siwak, Kamila
Powiązania:
https://bibliotekanauki.pl/articles/425694.pdf
Data publikacji:
2015
Wydawca:
Szkoła Główna Handlowa w Warszawie
Tematy:
core competencies
business strategy
Opis:
In the age of globalization, it appears that a good strategy should include the perspective of the future situation of the industry and orientation on the existing capacity in the form of tangible and intangible assets. Modern concepts of strategic planning place an increasing value on the intangible resources, it concerns particularly people and their knowledge, intellectual values incorporated in the patents, documentation, databases. It exposes the role of intellectual capital as a key success factor. The core competencies of the organization that can be configured to create a real economic value play an important role in this process. Their biggest advantage is the fact that they are rare, unique and irreplaceable by other resources, hence they are difficult to copy by the competitors. The aim of this article is to present the characteristic of the core competencies of the organization and their assignment to the various functions of the strategies that can be identified in the process of its creation. The results of the literature research are a list of the key features of functional strategies and a presentation of the impact of competence on individual tasks strategy.
Źródło:
e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie; 2015, 5 (62); 34-39
1731-6758
1731-7428
Pojawia się w:
e-mentor. Czasopismo naukowe Szkoły Głównej Handlowej w Warszawie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Resource-wise determinants of formulating an organizations strategy
Autorzy:
Gierszewska, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/392572.pdf
Data publikacji:
2019
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
core competencies
core capabilities
resources
strategies
kompetencje kluczowe
kluczowe możliwości
zasoby
strategie
Opis:
The aim of this article is to show that the models of management created by authorities are a live issue. This particular case pertains to the principles of Professor Karol Adamiecki, which refer to a resourceful approach to strategic management. The starting point for the analysis involves challenges of strategic management. These arise, in particular, from a reassessment of strategic and competence-related potential resources in the organization. In this paper material and immaterial resources, core competencies, and capabilities of the organization in the context of classical models of strategy are discussed.
Źródło:
Organizacja i Zarządzanie : kwartalnik naukowy; 2019, 2; 47-61
1899-6116
Pojawia się w:
Organizacja i Zarządzanie : kwartalnik naukowy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The researchers of influence of thermal treatment to structure and properties of core of rolls with layer of high alloyed cast iron
Issledovanie vlijanija termicheskojj obrabotki na strukturu i svojjstva serdceviny valkov v rabochim cloem iz vysokolegirovannogo chuguna
Autorzy:
Zhizhkina, N.
Powiązania:
https://bibliotekanauki.pl/articles/792340.pdf
Data publikacji:
2012
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
thermal treatment
structure
property
core
stress level
roll core
cast iron
iron alloy
Opis:
The paper is dedicated to researches of influence of thermal treatment to quality of rolls’ core. It has been established that high temperature of heating promote to changes in metal base of such material. It has been showed that such structural changes do not reduce properties’ level of core of rolls.
Статья посвящена исследованиям влияния термической обработки на качество сердцевины валков. Установлено, что высокая температура нагрева способствует изменениям в металлической основе такого материала. Показано, что такие структурные изменения не снижают уровень свойств.
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 3
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural similarity of CheY-like proteins
Autorzy:
Banach, M.
Konieczny, L.
Roterman, I.
Powiązania:
https://bibliotekanauki.pl/articles/1938624.pdf
Data publikacji:
2016
Wydawca:
Politechnika Gdańska
Tematy:
hydrophobicity
tertiary structure
hydrophobic core
Opis:
The problem of structural similarity of polypeptide chains of low sequence similarity representing a similar 3D structural form has been the object of analysis of researchers engaged in the protein folding problem. Three homologous proteins of similar biological function with low sequence similarity are the objects of analysis presented in this paper. The structure of a hydrophobic core is used as the criterion for structural similarity assessment of these three proteins. The applied method allows recognition of differentiati on in topologically similar structures.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2016, 20, 4; 383-392
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anomalous drill-core parting in the sediments of the Upper Silesian basin
Autorzy:
Kožušníková, A.
Fialová, V.
Hoch, I.
Powiązania:
https://bibliotekanauki.pl/articles/191518.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
core
anomalous parting
stress state
Opis:
Anomalous jointing of drillcores is sometimes observed in prospect boreholes in the Upper Silesian basin. The drillcore is jointed into discs, slices or porringers that are not resemblant to natural jointing. This occurs in various types of sediments, but especially in brittle rocks. Orientation of jointing planes is perpendicular to the borehole axis and does not depend on the distance from the front of the core run. Anomalous jointing reflects locally increased stress in the layer.
Źródło:
Annales Societatis Geologorum Poloniae; 2003, 73, No 2; 139-143
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Buckling of I-core sandwich panels
Wyboczenie paneli typu I-core
Autorzy:
Taczała, M.
Banasiak, W.
Powiązania:
https://bibliotekanauki.pl/articles/282043.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
I-core sandwich panels
buckling
Opis:
Necessity of optimisation of ship hull structural mass calls for application of innovative materials and structural components. One option is based on using structural components with internal structure. The considered sandwich panels are composed of two plates stifenned by vertical ribs (I-core) or ribs of different shape (V-core). Such panels are applied as the ship hull structural components, replacing the conventional stiffened panels. They are subject to typical loadings acting in the ship hull; tension, compression and lateral loading. Analysis of stability of sandwich panels subject to compressive loading is presented in the paper. Stabilities of conventional and innovative ship panels were compared. Influence of the filling foam was also investigated.
Optymalizacja masy kadłuba okrętowego wymaga zastosowania innowacyjnych materiałów i elementów konstrukcyjnych. Możliwe jest wykorzystanie elementów konstrukcyjnych ze strukturą wewnętrzną. Analizowane w pracy panele składają się z dwóch płyt usztywnionych żebrami pionowymi (I-core) lub żebrami innego kształtu (V-core). Panele takie stosowane są jako elementy konstrukcyjne kadłuba okrętowego zastępując konwencjonalne usztywnione panele. Poddane są one obciążeniu występującemu w kadłubie statku: rozciąganiu, ściskaniu i obciążeniu poprzecznemu. W pracy przedstawiono analizę stateczności sandwiczowych paneli typu I-core i V-core poddanych ściskaniu. Porównano stateczność konwencjonalnych i innowacyjnych paneli okrętowych. Zbadano także wpływ piany wypełniającej panele typu I-core.
Źródło:
Journal of Theoretical and Applied Mechanics; 2004, 42, 2; 335-348
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Harmony and Disharmony of General Education in Natural and Technical Sciences
Autorzy:
KACZOR, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/455734.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Rzeszowski
Tematy:
core curriculum
inter-subject correlation
Opis:
The article presents the advantages of the correlation of education curricula in the field of natural and technical sciences, and the consequences of lack of such a program coherence. Based on a detailed analysis of the latest core curricula regarding the fourth stage of education (secondary school), the areas of an evident disharmony are shown in teaching mathematics and physics as the most representative natural science subjects.
Źródło:
Edukacja-Technika-Informatyka; 2015, 6, 1; 244-248
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Regional Structure of Wages in Poland Over the Period 1995-2009
Autorzy:
Cieślik, Andrzej
Rokicki, Bartłomiej
Powiązania:
https://bibliotekanauki.pl/articles/517226.pdf
Data publikacji:
2013
Wydawca:
Instytut Badań Gospodarczych
Tematy:
core-periphery
regional wages
Polska
Opis:
In this paper, we test empirically for the increasing returns-based agglomeration and investigate the impact of the economic integration with the European Union on regional wage inequalities in Poland. In our study, we use the wage data for 16 Polish regions over the period of 1995-2009. Our results are consistent with the predictions of the core-periphery models of the New Economic Geography. In particular, we find that wages decrease as one moves away from the Mazowiecki capital region, as well as from the border with Germany.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2013, 8, 3; 65-78
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł

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