New meteor showers identified in the CAMS and SonotaCo meteoroid orbit surveys

A cluster analysis was applied to the combined meteoroid orbit database derived from low-light level video observations by the SonotaCo consortium in Japan (64,650 meteors observed between 2007 and 2009) and by the Cameras for All-sky Meteor Surveillance (CAMS) project in California, during its first year of operation (40,744 meteors from Oct. 21, 2010 to Dec. 31, 2011). The objective was to identify known and potentially new meteoroid streams and identify their parent bodies. The database was examined by a single-linking algorithm using the Southworth and Hawkins D-criterion to identify similar orbits, with a low criterion threshold of D < 0.05. A minimum member threshold of 6 produced a total of 88 meteoroid streams. 43 are established streams and 45 are newly identified streams. The newly identified streams were included as numbers 448-502 in the IAU Meteor Shower Working List. Potential parent bodies are proposed.Comment: Accepted in Proceedings of the Meteoroids 2013 Conference Aug. 26-30, 2013, A.M. University, Poznan, Polan

Adhesive Properties of Metals and Metal Alloys

The paper presents the effect of some surface treatment on the bonded joints strength of selected construction materials, adhesive properties of adherends after surface treatment and surface roughness. The aluminium alloys sheets, the titanium sheets and the stainless steel sheets were tested. In the experiments the following surface treatments were investigated: degreasing (chemical cleaning), mechanical treatment, mechanical treatment and degreasing, etching, anodising and chromate treatment. Adhesive joints were formed with a two component epoxy adhesive, Loctite 3430. Adhesive joint tensile-shear strength tests were performed in accordance with EN DIN 1465 standard on Zwick/Roell Z100 and Zwick/Roell Z150 testing machines. Adhesive properties were determined by surface free energy and surface free energy was determined by the Owens-Wendt method. The roughness of specimens was qualified by the method for measuring contact roughness, using an M2 profilometer manufactured by Mahr. The surface view was obtained by used NanoFocus uscan AF2. Results obtained from adhesive joint strength tests of materials evidence that surface treatment plays an important role in increasing strength of analysed joints. Tests indicate that in numerous instances this is mechanical treatment only or mechanical treatment followed by chemical cleaning which translate to the highest joint strength. The surface treatment method which introduces extensive changes in the analysed materials surface geometry is mechanical treatment. The results of surface roughness parameters measurement carried out on test samples subjected to anodising indicate that anodising has an impact on the height of surface irregularities. The application of various surface treatments in different structural materials allows modification of their adhesive properties, determined by the surface free energy. It was noted that different surface treatments contribute not only to the surface free energy changes but to the SFE components share in the total value. In the majority of variants of EN AW-2024PLT3 aluminium alloy sheet surface treatment the dispersive component amounted to the 93-99% of the total surface free energy. The assumption then should be that in order for the determination of a particular surface for adhesive processes to be comprehensive it should account for the adherends surface geometry as well as its adhesion properties. The geometry of surface can influence the mechanical adhesion and the surface free energy is connected with both mechanical adhesion and the other constituent of adhesion – proper adhesion

In search of mediators in the relationship between entrepreneurial orientation and performance: the mediating role of technology park support

Purpose – The aim of this paper is to determine the role of the technology park support in the relationship between entrepreneurial orientation (EO) and enterprise performance. Research method – A multi-stage statistical analysis with elements of econometrics was utilised. The reliability of individual scales by Cronbach’s alpha test was performed. Variables were treated as reflective and latent and exploratory and confirmatory factor analysis was performed. The relationship between the variables studied (analysis of Pearson correlation and Tau-B Kendall) was assessed. The Structural Equation Modelling (SEM) technique was used, including mediation analysis. Results – Technology park support is not a significant mediator of the relationship between EO and performance. Originality /value / implications /recommendations – The study results are a good starting point for further research to identify the variables which mediate the EO-performance relationship. They are also an inspiration to examine why companies in technology parks do not use the offer of support from these [email protected] of Law and Social Sciences, Jan Kochanowski University in KielceAnderson B.S, Kreisere P.M, Kuratko D.F, Hornsby J.S., Eshima Y., 2015, Reconceptualizing entrepreneurial orientation, “Strategic Management Journal”, vol. 36, iss. 10, pp. 1582-1583, DOI: 10.1002/smj.2298.Bedyńska S., Brzezicka A., Cypryańska M., 2012, Od teorii do analizy statystycznej. Jak badać zjawiska psychologiczne?, [w:] Statystyczny drogowskaz. Wprowadzenie do wnioskowania statystycznego, Bedyńska S., Cypryańska M. (red.), Wyższa Szkoła Psychologii Społecznej, Warszawa.Bratnicki M., Gabryś B.J., 2011, Orientacja przedsiębiorcza a sukces organizacji, „Prace i Materiały Wydziału Zarządzania Uniwersytetu Gdańskiego”, nr 4/2, s. 63-72.Covin J. G., Wales W. J., 2012, The Measurement of Entrepreneurial Orientation, “Entrepreneurship. Theory & Practice”, vol. 36(4), pp. 677-702, DOI: 10.1111/j.1540- 6520.2010.00432.x.Covin J.G., Slevin D.P., 1989, Strategic management of small firms in hostile and begin environments, “Strategic Management Journal”, vol. 10(11), pp. 75-87, DOI: 10. 1002/smj.4250100107.Diamantopoulos A., Riefler P., Roth K.P., 2008, Advancing formative measurement models, “Journal of Business Research”, vol. 61(12), pp. 1203-1218, DOI: 10.1016/ j.jbusres.2008.01.009.Dyduch W., 2008, Pomiar przedsiębiorczości organizacyjnej jako przesłanka podwyższania efektywności, „Organizacja i Zarzadzanie”, nr 4, s. 37-53.Dyduch W., Bratnicki M., 2018, Strategizing corporate entrepreneurship for value creation and value capture, “Journal of Contemporary Management”, vol. 17, iss. 1, pp. 7-26, DOI: 10.4467/24498939IJCM.18.001.8380.Ejdys J., 2014, Strategic orientation of small and medium size enterprises, „Economics and Management”, vol. 19, iss. 4, pp. 346-358, DOI: 10.5755/j01.em.19.4.8098.Fis A.M., Cetindamar D., 2009, Unlocking the Relationship between Corporate Entrepreneurship and Performance, “PICMET 2009 Proceedings”, Portland, Oregon USA, pp. 1819-1830.Gupta V., Gupta A., 2015, The Concept of Entrepreneurial Orientation, “Foundations and Trends in Entrepreneurship”, vol. 11, iss. 2, pp. 55-137, DOI: 10.1561/0300000054.Harms R., 2013, From entrepreneurial orientation to performance: Inside the black box of corporate entrepreneurship, “M@n@gemen”, vol. 16, iss. 4, pp. 357-432.Karpacz J., 2016, Implikacje konceptualizacji dla modelowania konstruktu i wskaźników orientacji przedsiębiorczej: ustalenia literaturowe „Management Forum”, nr 4(4), s. 9-15, DOI: 10.15611/mf.2016.4.02.Keh H.T., Tuyet Mai Nguyen T., PingNg H., 2007, The effects of entrepreneurial orientation and marketing information on the performance of SMEs, “Journal of Business Venturing”, vol. 22, iss. 4, pp. 592-611, DOI: 10.1016/j.jbusvent.2006.05.003.Lumpkin G.T., Dess G.G., 1996, Clarifying the entrepreneurial orientation construct and linking it to performance, “Academy of Management Review”, vol. 21(1), pp. 135-172, DOI: 10.2307/258632.Mażewska M., 2014, Raport o firmach działających w parkach i inkubatorach technologicznych w Polsce w 2013 r., SOOiPP, Poznań/Warszawa.Miller D., 1983, The Correlates of Entrepreneurship in Three Types of Firms, “Management Science”, vol. 29(7), pp. 770-791, DOI: 10.1287/mnsc.29.7.770.Mintzberg H., 1973, Strategy-making in three modes, “California Management Review”, vol. 16(2), pp. 44-53, DOI: 10.2307/41164491.Pichlak M., 2012, Uwarunkowania innowacyjności organizacji. Studium teoretyczne i wyniki badań empirycznych, „Difin”, Warszawa.Pukkinen T., 2018, The role of entrepreneurial orientation and dynamic capabilities in firm performance, Turun Yliopiston Julkaisuja – Annales Universitatis Turkuensis, Sarja – ser. E, osa – t. 26, Oeconomica, Turku.Rauch A., Wiklund J., Lumpkin G., Frese M., 2009, Entrepreneurial orientation and business performance: An assessment of past research and suggestions for the future, „Entrepreneurship: Theory & Practice”, vol. 33(3), pp.761-787, DOI: 10.1111/j.1540-6520.2009.00308.x.Rudawska J., 2016, Parki technologiczne na rzecz współdziałania i innowacji społecznych, „Innowacje społeczne. Jak mierzyć efekty innowacji społecznych?”, Instytut Badań Rynku, Konsumpcji i Koniunktur, Warszawa.Rudawska J., 2017, Innowacyjność organizacji – istota i pomiar, „Europa Regionum”, t. XXXI., s. 9-21, DOI: 10.18276/er.2017.31-01.Wales W.J., 2016, Entrepreneurial orientation: A review and synthesis of promising research directions, “International Small Business Journal”, vol. 34, pp. 3-15, DOI: 10.1177/0266242615613840.Wales W.J., Patel P.C., Parida V., Kreiser P.M., 2013, Nonlinear Effects of Entrepreneurial Orientation on Small Firm Performance: The Moderating Role of Resource Orchestration Capabilities, “Strategic Entrepreneurship Journal”, vol. 7(2), pp. 93-121, DOI: 10.1002/sej.1153.Wiklund J., Shepherd D., 2003, Knowledge-based resources, entrepreneurial orientation, and the performance of small and medium-sized businesses, “Strategic Management Journal”, vol. 24, pp. 1307-1314, DOI: 10.1002/smj.360.Wójcik-Karpacz A., 2017, Orientacja przedsiębiorcza a wynik firmy. Problem pomiaru wyniku, „Studia i Prace Kolegium Zarządzania i Finansów”, z. 153, s. 143-160.Wójcik-Karpacz A., 2019, Zdolności organizacyjne w kontekście wyników przedsiębiorstwa. Aspekty teoretyczne i wyniki badań empirycznych, PWN, Warszawa.Wójcik-Karpacz A., Karpacz J., Pavlov D., Rudawska J., 2019, Wpływ orientacji przedsiębiorczej na wynik przedsiębiorstwa, „Przegląd Organizacji”, nr 1, s. 11-19, DOI: 10.33141/po.2019.01.02.Wójcik-Karpacz A., Rudawska J., 2016, Instytucjonalne formy wspierania przedsiębiorczości w Polsce, „Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu”, nr 419, s. 248-264, DOI: 10.15611/pn.2016.419.22.Zbierowski P., 2012, Orientacja pozytywna organizacji wysokiej efektywności, Wolters Kluwer Polska, Warszawa.1(99)12814

WARTOŚĆ RELACJI WŁADZE SAMORZĄDOWE – KLASA KREATYWNA. EMPIRYCZNA WERYFIKACJA MODELU

Research into the creative class and its importance for regional development are the focus of interest of a number of researchers including R. Florida, A. Zolli, or C. Landry. In Polish literature this issue is discussed relatively rarely. And yet, those who perform creative professions are, by creating new forms in terms of innovative solutions, products and services, the ‘driving force’ that stimulates the economic growth. The purpose of this paper is an empirical verification of the model that presents the value of the relationship between local authorities and the creative class. The main research technique used in the study was a telephone interview using a standardised questionnaire. The research was carried out between 2010 and 2012 under a grant by the Ministry of Science and Higher Education.Badania nad klasą kreatywną i jej znaczeniem dla rozwoju regionalnego są w centrum zainteresowania takich badaczy, jak R. Florida, A. Zolli i C. Landry. W polskiej literaturze zagadnienie to poruszane jest relatywnie rzadko. Grupa osób wykonujących zawody twórcze jest „motorem” stymulującym wzrost gospodarczy poprzez tworzenie nowych form w postaci innowacyjnych rozwiązań, kreowanie produktów i usług. Celem niniejszego artykułu jest empiryczna weryfikacja modelu wartości relacji władze samorządowe – klasa kreatywna. Główną techniką badawczą był wywiad telefoniczny ze standaryzowanym kwestionariuszem. Badania przeprowadzono w ramach grantu finansowanego przez Ministerstwo Nauki i Szkolnictwa Wyższego w latach 2010-2012

Mechanical properties of hand-making polyester composites

The aim of this paper is to determine the effect of arrangement of fibreglass fabric plies in a polymer composite on a strength. Based on the experimental results, the real effect of plies arrangement and their most favourable configuration with respect to strength is determined. The experiments were performed on 4 types of handmade composites which had different fibre orientations and thicknesses. The first three of the composites had three plies of fabric. The plies arrangement in Composite I was unchanged, in Composite II the central ply had the 45 degrees orientation, while in Composite III the outside ply (tangential to the adhesive layer) was oriented at 45 degrees. In contrast. Composite IV consisted of five plies with unchanged arrangement. Composite plates were first cut into smaller specimens and then after stabilizing, the composite specimens were subjected to strength tests. The highest tensile strength and elongation are obtained for Composite IV, which was the higher the thickness from the tested composite samples, but for this composite the tensile modulus was lowest value. Composite II has the lowest values of strength parameters among the tested composites, which contain three plies and central ply has the 45 degrees orientation.Web of Science12212011

A choice of the optimum cutting ranges for cutting nozzles a-sd for selection of metallurgical material.

On the market there are plenty of machines for cutting of steel via a mixture of oxygen and flammable gases. Various manufacturers provide several types of torches, cutting nozzles and other equipment in their product range. Cutting nozzles are a component that significantly affects quality of cutting based in set parameters. However, data from catalogues and manuals by manufacturers on cutting parameters of nozzles are rarely in use in real conditions. That is why optimum cutting conditions for cutting via nozzles A-SD made by RHONA were tested and the final results were compared with those in the catalogue for a proper use in practice.Web of Science12311310

Aging effects of aqueous environment on mechanical properties of calcium carbonate-modified epoxy resin

The purpose of this study was to assess the effects of different aqueous environments (i.e., demineralised, distilled and spring water) on the mechanical properties of a cold-cured bisphenolic epoxy resin modified with the addition of calcium carbonate filler, typically employed as structural adhesive. The parameters selected for the analysis have been; the kind of curing agent employed to cure the epoxy resin at ambient temperature (i.e., Mannich base and triethylenetetramine); the load of calcium carbonate added to liquid epoxy (i.e., from 1 to 3 g per 100 g of resin) and; the duration of the exposure to the different aging conditions (i.e., from 1 to 10 months). Cylindrical specimens of calcium carbonate-modified epoxy systems were tested in compression mode, before and after each of the aging regimes. The effect of the selected curing agents is very small, and they are both suitable for a cure at ambient temperature, on the unfilled epoxy on compressive maximum strength and strain at break; the choice of the hardener affects instead the compressive modulus. The CaCO3 amount was demonstrated to have a significant effect on the mechanical characteristics of un-aged epoxy systems, leading to growth in compressive modulus and maximum strength with reductions in strain at break. Generally speaking, the aging time noticeably affects the compressive properties of calcium carbonate-modified epoxies while almost negligible is the kind of water employed in each exposure regime. Notwithstanding the adverse effects of an aqueous environment on compressive mechanical properties of CaCO3-filled epoxies, these systems keep compressive modulus and maximum strength greater than, and close to, respectively, the same characteristics measured on unaged unfilled control epoxies, demonstrating the positive effect of the addition of this kind of filler to epoxy-based structural adhesives, especially with the addition of 2 and 3 g of CaCO3 per 100 g resin. The results obtained in this study demonstrated that it is possible to contrast the detrimental effects observed in cold-cured epoxy-based structural adhesives due to their aging in water upon the addition of limited amounts (particularly at 2 and 3 g per 100 g resin) of a cheap CaCO3 filler

Cold-Cured Bisphenolic Epoxy Adhesive Filled with Low Amounts of {CaCO}3: Effect of the Filler on the Durability to Aqueous Environments

The effects of aging exposures to three non-saline aqueous environments on the compressive mechanical properties of a calcium carbonate-filled bisphenolic epoxy adhesive, cold-cured with the addition of two curing agents suitable for the cure at ambient temperature (i.e., Mannich base and triethylenetetramine), were assessed. The amount of the added filler (CaCO3) varied from 1 to 3 g per 100 g of resin; the immersion times in each of the selected medium varied from 1 to 10 months. It was found that the mechanical properties measured in compression mode on cylindrical specimens of unfilled and CaCO3 -loaded epoxy were scarcely influenced by the kind of curing agent employed; only the compressive modulus was limitedly affected by this parameter. Referring to the behavior when aged in water, the CaCO3 -filled epoxies displayed noticeable growths in modulus, small reductions in strength, and limited variations in strain, with a certain influence of the exposure time, especially when comparing the properties at the lowest time with those at medium–long times. On the basis of the results of statistical MANOVA analysis, it can be concluded that among the compositional factors (i.e., the type of curing agent employed to cure the epoxy compounds and the micro-filler content), only the amount of CaCO3 filler significantly affects the compressive modulus