bluuebunny/crossref_metadata_2025 huggingface dataset:
Inovação no setor público: análise da produção científica em periódicos nacionais e internacionais da área de administração
Authors: Brandão Soraya Monteiro , Bruno-Faria Maria de Fátima
Published: February 2013

O artigo tem como objetivo apresentar um panorama da produção científica em periódicos nacionais e internacionais sobre inovação no setor público no período entre 2000 e 2010. Foram analisados os objetivos dos estudos, as opções metodológicas assumidas pelos autores e as principais contribuições para o avanço da compreensão do tema. No Brasil, a produção em tais periódicos encontra-se em estágio inicial, mas constata-se um número crescente de publicações nos últimos cinco anos. Já no contexto internacional, a produção científica encontra-se mais consolidada, em três principais focos de estudo: fatores ambientais, organizacionais e gerenciais que influenciam a inovação no setor público. Foram identificadas lacunas de pesquisa em cinco temas: (a) processo de inovação, (b) indutores e barreiras, (c) características das lideranças que facilitam a inovação, (d) efeitos da inovação e (e) fatores que contribuem para a disseminação de inovações no setor público.
A meditatio mortis montaigniana
Authors: Orione Eduino José
Published: February 2013

Este artigo investiga o ensaio "Que philosopher c'est apprendre a mourir", de Michel de Montaigne. Trata-se de um texto que é um bom exemplo da forma como o filósofo rejeita a tradição metafísica na qual o problema da morte sempre foi pensado. Mostramos que a originalidade deste ensaio reside no fato de Montaigne nos aconselhar a seguir a natureza, que, em seu pensamento, se confunde com o costume.
Fatores associados à intoxicação infantil
Authors: Tavares Érika Okuda , Buriola Aline Aparecida , Santos Jessica Adrielle Teixeira , Ballani Tanimária da Silva Lira , Oliveira Magda Lúcia Félix de
Published: February 2013

Objetivou-se analisar os fatores associados à intoxicação em crianças, a partir de casos registrados no Centro de Controle de Intoxicações do Hospital Universitário Regional de Maringá. Estudo exploratório descritivo, com busca retrospectiva em registros de intoxicação em crianças atendidas em 2008. Os resultados evidenciaram como fatores associados à intoxicação infantil o sexo masculino e a faixa etária entre zero e quatro anos; como fator predisponente, a residência, em que presença do adulto no momento do acidente não impediu a ocorrência da intoxicação; e entre os fatores desencadeantes o acesso facilitado a medicamentos e a via de exposição oral. Considerando a intoxicação infantil um agravo evitável, o foco está na prevenção, com orientações sobre acondicionamento de agentes tóxicos, vigilância das famílias com conscientização dos riscos do ambiente doméstico, bem como apoio estatal, com implantação de embalagem de proteção à criança, com tampa inviolável e disponibilização de doses fracionadas para extinguir as "farmácias caseiras".
Mudanças das rotinas familiares na transição inesperada por desastre natural
Authors: Fernandes Gisele Cristina Manfrini , Boehs Astrid Eggert
Published: February 2013

Desastres naturais são eventos disruptivos às rotinas e rituais familiares e promovem mudanças significativas na vida e na saúde. O objetivo deste artigo foi discutir as rotinas diárias ao longo das trajetórias na transição familiar pela ocorrência de um desastre natural ocorrido em uma área rural. Trata-se de um estudo qualitativo de múltiplos casos, realizado com seis famílias com crianças. Os dados foram coletados em 2010, com técnicas de observação participante, entrevista narrativa, genograma, ecomapa e o calendário de rotinas familiares. Foi feita a análise das narrativas, e os resultados revelaram a mudança nas rotinas e rituais nas trajetórias entre o pré, o pós-desastre e atualidade. A transição abrupta gerou reações estressantes, afetando a saúde dos membros. São necessários mais estudos sobre a saúde no pós-desastre que contribuam ao conhecimento, ao ensino e à prática do cuidado de enfermagem, especialmente na estratégia de saúde da família.
Participation Motivation Questionnaire: tradução e validação para uso em atletas-jovens brasileiros
Authors: Guedes Dartagnan Pinto , Silvério Netto José Evaristo
Published: February 2013

Os objetivos do estudo foram traduzir para o idioma português, realizar a adaptação transcultural e identificar as propriedades psicométricas para atletas-jovens brasileiros do Participation Motivation Questionnaire (PMQ). A versão original foi traduzida de acordo com recomendações internacionais. Um comitê de juízes foi formado para analisar as versões traduzidas do questionário. O comitê utilizou como critério de análise as equivalências semântica, idiomática, cultural e conceitual. A versão final do questionário traduzido foi administrada em uma amostra de 1517 atletas-jovens (714 moças e 803 rapazes) com idades entre 12 e 18 anos. Para identificar as propriedades psicométricas foi realizada análise fatorial confirmatória com rotação varimax e, na seqüência, para análise da consistência interna de cada fator associado à motivação para a prática de esporte, foi empregado coeficiente alfa de Cronbach. Após discretas modificações apontadas no processo de tradução, o comitê de juízes considerou que a versão para o idioma português do PMQ apresentou equivalências semântica, idiomática, cultural e conceitual. A análise fatorial confirmou a estrutura de oito fatores originalmente proposta, explicando 67% da variância total com satisfatórios valores de consistência interna. O alfa de Cronbach apresentou coeficientes entre 0,543 e 0,827. Concluindo, a tradução, a adaptação transcultural e as qualidades psicométricas do PMQ foram satisfatórias, o que viabiliza sua aplicação em futuros estudos no Brasil.
A multimetric index based on fish fauna for the evaluation of the biotic integrity of streams at a mesohabitat scale
Authors: Casatti Lilian , Teresa Fabrício Barreto
Published: February 2013

AIM: In this study, we evaluated the ability of the Index of Biotic Integrity (IBI), based on fish fauna, to discriminate between reference streams and degraded streams at a mesohabitat scale. METHODS: We sampled the ichthyofauna of 96 mesohabitats (runs, riffles and pools) with electrofishing gear in six streams (three reference and three degraded) of comparable volume, width, and depth. Twelve attributes were tested separately for different mesohabitat types. RESULTS: Ten of the metrics tested were used to obtain the IBI for runs, six for riffles and ten for pools. The IBI indicated poor conditions for runs and riffles and very poor conditions for pools. CONCLUSIONS: These results indicate that the IBI may be useful for distinguishing among environments with contrasting conservation status at a mesohabitat scale. Differences were obtained not only in the sets of metrics valid for each mesohabitat but also in the final scores and rankings of the mesohabitat types assessed. These results emphasize the importance of considering the structural and biological variability of aquatic environments to capture the significance of losses of integrity due to human influence.
Bayesian History Matching and Uncertainty Quantification under Sparse Priors: A Randomized Maximum Likelihood Approach
Authors: Khaninezhad Momammadreza M. , Jafarpour Behnam
Published: February 2013

Despite their apparent high dimensionality, spatially distributed reservoir properties can often be compactly (sparsely) described in a properly designed basis. Hence estimation of high-dimensional reservoir flow properties from dynamic performance data, a.k.a. history matching, can be formulated and solved as a sparse reconstruction inverse problem. Recent advances in statistical signal processing, formalized under the compressed sensing paradigm, provide important guidelines on formulating and solving sparse inverse problems, primarily for linear models. Sparse inverse problems have been mainly formulated as a deterministic inverse problem. Given the uncertainty in describing the reservoir properties, even after integration of the dynamic data, it is important to develop a practical sparse Bayesian inversion framework to enable uncertainty quantification. We use sparse geologic dictionaries to compactly represent uncertain reservoir properties and develop a sparse Bayesian approach for effective data integration and uncertainty quantification. In formulating the Bayesian inversion, commonly used Gaussian distributions are not appropriate for representing sparse prior models. Following the results presented by the compressed sensing paradigm, Laplace (or double exponential) probability distributions are appropriate for representing sparse parameters. However, combining Laplace priors with frequently used Gaussian likelihood functions leads to neither Laplace nor Gaussian posterior distributions, thereby complicating the analytical characterization of the posterior distribution. Here, we first express the form of the Maximum A-Posteriori (MAP) estimate for Laplace priors, and then, as a practical approximation, use the Monte-Carlo-based Randomize Maximum Likelihood (RML) method to sample from the derived posterior distribution for uncertainty quantification. The Sparse RML (SpRML) realizations are approximate samples from the posterior distribution and provide a mechanism for assessing the uncertainty in the calibrated reservoir model with a relatively modest computational complexity. We demonstrate the suitability and effectiveness of the proposed SpRML formulation with a synthetic dataset and the model adapted from the PUNQ-S3 benchmark reservoir.
Investigation of forced and total degradation products of amlodipine besylate by liquid chromatography and liquid chromatography-mass spectrometry
Authors: Stoiljkovic Zora , Jadranin Milka , Djuric Svetlana , Petrovic Slobodan , Ivic Avramov , Mijin Dusan
Published: February 2013

An isocratic, reversed-phase liquid chromatographic method was applied for
the investigation of the degradation products of amlodipine besylate under
the stressed conditions in solution. Amlodipine besylate stock solutions were
subjected to acid and alkali hydrolysis, chemical oxidation and
photodegradation as well as to the electrochemical degradation by cyclic
voltammetry in 0.05 mol/L NaHCO3 on gold electrode. The total degradation of
amlodipine besylate was achieved in 5 mol/L NaOH at 80?C for 6 h and the
compound with molecular formula C15H16NOCl was identified as a main
degradation product. Under acidic (5 mol/L HCl at 80?C for 6 h) stress
conditions 75.2% of amlodipine besylate degradation was recorded. Oxidative
degradation in the solution of 3% H2O2-methanol 80:20 at 80?C for 6 h showed
that amlodipine besylate degraded to 80.1%. After 14 days of expose in
photostability chamber amlodipine besylate solution showed degradation of
32.2%. In electrochemical degradation after 9 hours of cyclization the
beginning of amlodipine oxidation was shifted for 200 mV to more negative
potentials, with the degradation of 66.5%. Mass spectrometry analysis
confirmed the presence of dehydro amlodipine derivate with molecular formula
C20H23N2O5Cl in oxidative and acidic conditions while in electrochemical
degradation was detected in traces.
Developmental Role for Endocannabinoid Signaling in Regulating Glucose Metabolism and Growth
Authors: Li Zhiying , Schmidt Sarah F. , Friedman Jeffrey M.
Published: February 2013

Treatment of ob/ob (obese) mice with a cannabinoid receptor 1 (Cnr1) antagonist reduces food intake, suggesting a role for endocannabinoid signaling in leptin action. We further evaluated the role of endocannabinoid signaling by analyzing the phenotype of Cnr1 knockout ob/ob mice. Double mutant animals show a more severe growth retardation than ob/ob mice with similar levels of adiposity and reduced IGF-I levels without alterations of growth hormone (GH) levels. The double mutant mice are also significantly more glucose intolerant than ob/ob mice. This is in contrast to treatment of ob/ob mice with a Cnr1 antagonist that had no effect on glucose metabolism, suggesting a possible requirement for endocannabinoid signaling during development for normal glucose homeostasis. Double mutant animals also showed similar leptin sensitivity as ob/ob mice, suggesting that there are developmental changes that compensate for the loss of Cnr1 signaling. These data establish a role for Cnr1 during development and suggest that compensatory changes during development may mitigate the requirement for Cnr1 in mediating the effects of leptin. The data also suggest a developmental role for Cnr1 to promote growth, regulate the GH/IGF-I axis, and improve β-cell function and glucose homeostasis in the setting of leptin deficiency.
Immune Therapy and β-Cell Death in Type 1 Diabetes
Authors: Lebastchi Jasmin , Deng Songyan , Lebastchi Amir H. , Beshar Isabel , Gitelman Stephen , Willi Steven , Gottlieb Peter , Akirav Eitan M. , Bluestone Jeffrey A. , Herold Kevan C.
Published: February 2013

Type 1 diabetes (T1D) results from immune-mediated destruction of insulin-producing β-cells. The killing of β-cells is not currently measurable; β-cell functional studies routinely used are affected by environmental factors such as glucose and cannot distinguish death from dysfunction. Moreover, it is not known whether immune therapies affect killing. We developed an assay to identify β-cell death by measuring relative levels of unmethylated INS DNA in serum and used it to measure β-cell death in a clinical trial of teplizumab. We studied 43 patients with recent-onset T1D, 13 nondiabetic subjects, and 37 patients with T1D treated with FcR nonbinding anti-CD3 monoclonal antibody (teplizumab) or placebo. Patients with recent-onset T1D had higher rates of β-cell death versus nondiabetic control subjects, but patients with long-standing T1D had lower levels. When patients with recent-onset T1D were treated with teplizumab, β-cell function was preserved (P < 0.05) and the rates of β-cell were reduced significantly (P < 0.05). We conclude that there are higher rates of β-cell death in patients with recent-onset T1D compared with nondiabetic subjects. Improvement in C-peptide responses with immune intervention is associated with decreased β-cell death.
Topical Administration of Allogeneic Mesenchymal Stromal Cells Seeded in a Collagen Scaffold Augments Wound Healing and Increases Angiogenesis in the Diabetic Rabbit Ulcer
Authors: O’Loughlin Aonghus , Kulkarni Mangesh , Creane Michael , Vaughan Erin E. , Mooney Emma , Shaw Georgina , Murphy Mary , Dockery Peter , Pandit Abhay , O’Brien Timothy
Published: February 2013

There is a critical clinical need to develop therapies for nonhealing diabetic foot ulcers. Topically applied mesenchymal stromal cells (MSCs) provide a novel treatment to augment diabetic wound healing. A central pathological factor in nonhealing diabetic ulcers is an impaired blood supply. It was hypothesized that topically applied allogeneic MSCs would improve wound healing by augmenting angiogenesis. Allogeneic nondiabetic bone-marrow derived MSCs were seeded in a collagen scaffold. The cells were applied to a full-thickness cutaneous wound in the alloxan-induced diabetic rabbit ear ulcer model in a dose escalation fashion. Percentage wound closure and angiogenesis at 1 week was assessed using wound tracings and stereology, respectively. The topical application of 1,000,000 MSCs on a collagen scaffold demonstrated increased percentage wound closure when compared with lower doses. The collagen and collagen seeded with MSCs treatments result in increased angiogenesis when compared with untreated wounds. An improvement in wound healing as assessed by percentage wound closure was observed only at the highest cell dose. This cell-based therapy provides a novel therapeutic strategy for increasing wound closure and augmenting angiogenesis, which is a central pathophysiological deficit in the nonhealing diabetic foot ulcer.
Around rationality of cycles
Authors: Fino Raphaël
Published: February 2013

We prove certain results comparing rationality of algebraic cycles over the function field of a quadric and over the base field. These results have already been obtained by Alexander Vishik in the case of characteristic 0, which allowed him to work with algebraic cobordism theory. Our proofs use the modulo 2 Steenrod operations in the Chow theory and work in any characteristic ≠ 2.
Pleistocene glacial morphology and timing of last glacial cycle in cantabrian mountains (Northern Spain): new chronological data from the Asón area
Authors: Frochoso Manuel , González-Pellejero Raquel , Allende Fernando
Published: February 2013

The timing of the local last glacial maximum in the mountains of the Northern Iberian Peninsula is not synchronous with the global Last Glacial Maximum (LGM) probably due to the marginal position of the Northern Iberian Peninsula within the European continent. The study of a Cantabrian massif, the Asón platform and summits, provides new data on the extent and timing of the local last glaciation. Here we can place the last maximal extent of glaciers during Early Würm, according to OSL dating on till samples. The main glaciers developed at least between 78-65 ka BP, well centred on MIS 4 and even the transition to MIS 5. The erosive efficacy of these glaciers decreased later, ca. 45–40 ka BP, until they abruptly disappeared from the edges of the massif. A new ice advance left well-defined moraines at the edges of the massif’s internal depressions, indicating a tongue disjunction phase with two glacier sub-stages, probably one at the beginning of the cooling ca. 27–25 ka BP, followed by a retreat and another glacial advance ca. 21–18 ka BP. After these episodes the glaciers disappeared from the Asón Mountains and only some residual glaciers were formed that may be related to the LGM.
Assessment of bioclimatic comfort conditions based on Physiologically Equivalent Temperature (PET) using the RayMan Model in Iran
Authors: Daneshvar Mohammad , Bagherzadeh Ali , Tavousi Taghi
Published: February 2013

In this study thermal comfort conditions are analyzed to determine possible thermal perceptions during different months in Iran through the Physiologically Equivalent Temperature (PET). The monthly PET values produced using the RayMan Model ranged from −7.6°C to 46.8°C. Over the winter months the thermal comfort condition (18–23°C) were concentrated in southern coastal areas along the Persian Gulf and Oman Sea. Most of the country experienced comfort conditions during the spring months, in particular in April, while during the summer months of July and August no thermal comfort conditions were observed. In November coastal areas of the Caspian Sea had the same physiological stress level of thermal comfort as April. The map produced showing mean annual PET conditions demonstrated the greatest spatial distribution of comfortable levels in the elevation range from 1000 to 2000 meter a.s.l., with annual temperatures of 12–20°C and annual precipitation of under 200 mm. The statistical relationship between PET conditions and each controlling parameter revealed a significant correlation in areas above 2000 meter, annual temperature over 20°C and annual precipitation of 200–400 mm with a correlation coefficient (R 2) of 0.91, 0.97 and 0.96, respectively.
ACTN-3 and ACE genotypes in elite male Italian athletes
Authors: Massidda Myosotis , Corrias Laura , Scorcu Marco , Vona Giuseppe , Calò Maria Carla
Published: February 2013

The ACE I/D and the ACTN-3 R577X polymorphisms are the most studied genes associated with elite athlete status, even if this association has been often conflicting. The aim of the present study was to investigate the association between the ACE and the ACTN3 genotypes and elite performance in Italian male athletes. The ACTN-3 R577X and the ACE I/D genotype distributions of 59 elite male Italian athletes practicing gymnastics (G; n = 17), 100 m–400 m running (R; n = 12), and playing soccer (S; n= 30) were compared with controls from Italian (C; n = 31) populations. For ACE distribution, athletes did not differ from controls (G, χ2 = 0.37, df = 2, p = 0.82; R, χ2 = 1.90, df = 2, p = 0.45; S, χ2 = 1.48, df = 2, p = 0.47) and the DD genotype was at very high frequency in all groups (G = 53%, R= 50%, S = 60%, C = 45%). For ACTN-3 distribution, elite gymnasts showed a significant difference from controls (χ2 = 6.57, df = 2, p = 0.03), showing an absence of XX genotype. Soccer players and runners did not differ from controls in ACTN-3 genotype distribution (R, χ2 =0.43, df = 2, p = 0.80; S, χ2 = 1.25, df = 2, p = 0.53). Even if the ACE DD genotype is often positively associated with elite sprint/power athlete status, its high frequency in Italian populations eliminates the possibility of its exclusive association in Italian athletes. The results of ACTN3 genotypes suggest that RR genotype of ACTN-3 gene is a determinant of elite gymnasts status but it is not the key factor for achieving a top-level performance in soccer or track events.
Perceived health status among middle-aged Polish people in relation to selected demographic and social factors
Authors: Kaczmarek Maria , Skrzypczak Magdalena
Published: February 2013

Self-rated health is an important measure of health status and outcomes and plays a significant role in the quality of life. The main purpose of the study was to estimate selected demographic and socio-economic factors associated with perceived health status among middle-aged Polish people.

The sample being studied consisted of 5,776 women and 2,191 men aged 35–65 years, participants of two nation-wide cross-sectional surveys: the survey on middle-aged women’s health and quality of life (WOMID) and the survey on men’s health and quality of life, both conducted in 2000–2004. Participants were administered a gender-specific questionnaire on demographic, socio-economic status, lifestyle behaviours and self-rated health. The subjectively evaluated health status was then correlated with sex, age, marital status, place of residence, education level, financial situation, types of leisure time and the tobacco use. Data were processed using uni- and multivariate statistical procedures including the logistic regression models LOGITs and multiple correspondence analysis (MCA). It was found that the perceived health status was associated with women’s and men’s age, and in women with their menopausal status. Women were likely to evaluate their health significantly worse than men. It was found that marital status, educational attainment and financial well-off were the factors significantly associated with perceived health status in both women and men. In concluding remarks it should be stated that the health perception of women and men in mid-life is significantly related to their socio-economic status.
Early Aptian bay deposits at the southern margin of the Lower Saxony Basin: Integrated Stratigraphy, palaeoenvironment and Oae 1a
Authors: Lehmann Jens , Friedrich Oliver , Von Bargen Dieter , Hemker Thomas
Published: February 2013

Lehmann, J., Friedrich, O., von Bargen, D. and Hemker, T. 2012. Early Aptian bay deposits at the southern margin of the lower Saxony Basin: Integrated stratigraphy, palaeoenvironment and OAE 1a. Acta Geologica Polonica, 62 (1), 35-62. Warszawa.

The present study establishes a lithostratigraphic subdivision, a bio- and chemostratigraphy and describes the sedimentology of the Alstatte Bay at the southern margin of the Lower Saxony Basin in northern Germany. The socalled Fischschiefer is developed in the lower part of the section, a 2.1 m thick laminated interval that shows TOC values of up to 2 % and is interpreted as local expression of the global Oceanic Anoxic Event 1a (OAE 1a). The basal part of the Fischschiefer is fairly continuously laminated, whereas its upper part is characterized by an alternation of laminated and non-laminated beds. Stable carbon isotopes (δ13 C carb ) show a characteristic pattern for the Fischschiefer interval that can be correlated with sections from the Tethyan Realm. Immediately above the Fischschiefer, however, the studied section might reveal a diagenetic overprint as indicated by very negative carbon stable isotope values. The remaining part of the section is characterized by a rather monotonous claystone succession, terminated by a greenish layer rich in glauconite overlain by glacial till of Pleistocene age. The fauna is typically Boreal in the lower part of the section, but changes around 2 m above the Fischschiefer towards an assemblage indicating a distinct Tethyan influx. The faunal shift is considered to be due to the maximum flooding of the continuous, long-term sea level rise of the Early Aptian which led also to a supposed shift from a restricted to open bay environment.
Stability relationships of REE-bearing phosphates in an alkali-rich system (nepheline syenite from the Mariupol Massif, SE Ukraine)
Authors: Dumańska-Słowik Magdalena , Budzyń Bartosz , Heflik Wiesław , Sikorska Magdalena
Published: February 2013

Dumańska-Słowik, M., Budzyń, B., Heflik, W. and Sikorska, M. 2012. Stability relationships of REE-bearing phosphates in an alkali-rich system (nepheline syenite from the Mariupol Massif, SE Ukraine). Acta Geologica Polonica, 62 (2), 247-265. Primary REE-enriched fluorapatite and fluorbritholite-(Ce) in nepheline syenite from the Mariupol Massif (SE Ukraine), contain textural and chemical evidence of late- to post-magmatic metasomatic alteration. REE mobilization and replacement of the primary phases by fluid-mediated coupled dissolution-reprecipitation strongly depended on the distance between the altered minerals in the host rock. Fluorapatite and fluorbritholite-(Ce) forming individual pristine grains were partially replaced by the same phase with a new composition, resulting in the presence of patchy zoning in altered grains. The increased REE contents in altered fluorapatite rim domains are related to REE mobilization from the altered REE-depleted rim domains of the fluorbritholite-(Ce). The REEs were transported by a fluid with high F activity. The alteration of fluorapatite and fluorbritholite-(Ce) grains in contact resulted in the partial replacement of the primary phases by the same phase with a new composition, but also in the partial replacement of the fluorapatite by secondary monazite and fluorite. The REE mobilized from the fluorbritholite-(Ce) in the presence of a F-rich fluid in an alkali-rich system promoted formation of monazite as the new phosphate REE-host. The presence of secondary parisite in the altered domains of the fluorapatite and fluorbritholite-(Ce) indicates a CO 2 component in the fluid during metasomatic alteration.
Sedimentology and ichnology of Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków- Silesia Homocline, Poland
Authors: Leonowicz Paulina
Published: February 2013

Leonowicz, P. 2012. Sedimentology and ichnology of Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Krakow-Silesia Homocline, Poland. Acta Geologica Polonica, 62 (3), 281-296. Warszawa.

The lithology, sedimentary structures and trace fossil association from the Bathonian organic-rich mudstones from Krakow-Silesia Homocline (SW Poland) are described and a preliminary interpretation of the palaeoenvironment is presented. The ore-bearing clays exposed in the Gnaszyn clay-pit are developed as dark grey claysilt deposits with a few horizons of sideritic concretions. Sedimentological analysis has revealed that these deposits originated in the offshore part of a marine basin, below the fair weather wave base. Relict parallel lamination suggests that the predominant mechanism of deposition was quiet settling from suspension. However, locally preserved storm deposits indicate that the sea bottom was affected by offshore flows, deriving coarser material from the nearshore area. The degree of bioturbation is high but the diversity of the trace-fossil association is low. It consists mainly of Chondrites, Trichichnus, pyritized burrows and less common Palaeophycus. Other traces, including Thalassinoides, Planolites, Taenidium and some undetermined burrows, occur mainly in the lower part of the succession. This ichnoassociation combines features of distal Cruziana and Zoophycos ichnofacies, suggesting poor oxygenation of the bottom sediment. Temporary improvements in bottom oxygenation, linked with more intense mixing of water during major storms, resulted in the more diverse trace fossil suite that is found in some intervals of the succession.
Faunal dynamics of bivalves and scaphopods in the Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland
Authors: Kaim Andrzej , Sztajner Przemysław
Published: February 2013

Kaim, A. and Sztajner, P. 2012. Faunal dynamics of bivalves and scaphopods in the Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland. Acta Geologica Polonica, 62(3), 381- 395. Warszawa.

The environment at the Gnaszyn section - as deduced from bivalve and scaphopod dynamics - was controlled by the substrate consistency and possibly oxygen deficiency near the sediment-water interface and/or oxygen content fluctuations. The middle part of the section dominated by nuculoid and corbulid bivalves and Laevidentalium -type scaphopods probably reflects a soupy substrate and possibly oxygen deficiency in the sediment. Slightly coarser and better-oxygenated silts in the upper and lower parts of the section offered a less soupy substrate consistency, allowing the development of communities dominated by astartids, byssate bivalves, and Dentalium - and Plagioglypta-type scaphopods.
Palaeoenvironmental reconstruction of Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Kraków-Silesia Homocline, Poland
Authors: Gedl Przemysław , Kaim Andrzej , Leonowicz Paulina , Boczarowski Andrzej , Dudek Teresa , Kędzierski Mariusz , Rees Jan , Smoleń Jolanta , Szczepanik Patrycja , Sztajner Przemysław , Witkowska Magda , Ziaja Jadwiga
Published: February 2013

Gedl, P., Kaim, A., Leonowicz, P., Boczarowski, A., Dudek, T., Kędzierski, M., Rees, J., Smoleń, J., Szczepanik, P., Sztajner, P., Witkowska, M. and Ziaja, J. 2012. Palaeoenvironmental reconstruction of Bathonian (Middle Jurassic) ore-bearing clays at Gnaszyn, Krakow-Silesia Homocline, Poland. Acta Geologica Polonica, 62(3), 463-484. Warszawa.

Multidisciplinary studies of the Middle-Upper Bathonian ore-bearing clays at Gnaszyn revealed variable palaeoenvironmental conditions during the deposition of this seemingly monotonous sequence. We interpret the conditions in the bottom environment and the photic zone, and also evaluate the influence of the adjacent land areas, based on sedimentology, geochemistry, sporomorphs and palynofacies composition, benthic (foraminifera, gastropods, bivalves, scaphopods, echinoderms), planktonic (calcareous nannoplankton, dinoflagellate cysts), and nektonic (sharks) fossils. The Gnaszyn succession originated relatively close to the shore, within reach of an intense supply of terrestrial fine clastic and organic particles. The latter are mainly of terrestrial origin and range from 1.5 to 2.5 wt.%. The precise water depth is difficult to estimate but most likely ranges from several tens of metres to a few hundred metres. All fossil groups show minor changes throughout the succession. As the climate seems to have been quite stable during this period we consider sea-level fluctuations to have been the main factor responsible for the changes. The terrestrial input, including freshwater and land-derived clastic and organic particles (sporomorphs and cuticles), increased during periods of sea-level lowstand. As a consequence, stress conditions (lower salinity, higher nutrient availability, lower water transparency) in the photic zone caused blooms of opportunistic planktonic taxa. Furthermore, a faster sedimentation rate led to oxygen depletion and deterioration of the living conditions in the bottom environment due to an increased accumulation of organic matter. As a result, the benthic biota became taxonomically impoverished and commonly dominated by juvenile forms. During periods of high sea level, the source areas were shifted away from the basin, resulting in a decrease in the terrestrial influx, increase in the salinity of surface waters, the appearance of more diverse phytoplankton assemblages, a lower sedimentation rate, and an improvement of living conditions at the bottom.
Integrated stratigraphy of the Campanian–Maastrichtian boundary succession of the Middle Vistula River (central Poland) section; introduction
Authors: Walaszczyk Ireneusz
Published: February 2013

Walaszczyk, I. 2012. Integrated stratigraphy of the Campanian-Maastrichtian boundary succession of the Middle Vistula River (central Poland) section; introduction. Acta Geologica Polonica, 62 (4), 463-471. Warszawa.

The Campanian-Maastrichtian boundary interval of the Middle Vistula River valley section (central Poland) represents a continuous, lithologically monotonous, fossiliferous succession, with a good stable isotope and palaeomagnetic signal. It yields all the biostratigraphically critical macro- and microfossil groups: ammonites, belemnites, inoceramid bivalves, foraminifera, nannofossils and dinoflagellates. Additionally, it is located in the transitional zone between the Boreal and Tethyan biogeographic provinces, as well as between the western and eastern biogeographic areas of Europe. The section supplements the data on the interval acquired recently from the basal Maastrichtian stratotypic section in Tercis, south-west France, and from the interval reference section in Kronsmoor, northern Germany
The Belemnella stratigraphy of the Campanian– Maastrichtian boundary; a new methodological and taxonomic approach
Authors: Remin Zbigniew
Published: February 2013

Remin, Z. 2012. The Belemnella stratigraphy of the Campanian-Maastrichtian boundary; a new methodological and taxonomic approach. Acta Geologica Polonica, 62 (4), 495-533. Warszawa.

The taxonomy and stratigraphy of the Upper Campanian and Lower Maastrichtian belemnites from the Vistula (central Poland) and Kronsmoor (northern Germany) sections are revised on the basis of new collections from the Vistula section as well as a reinvestigation of the classic collection of Schulz from the Kronsmoor section. For the taxonomic description a new biometric procedure is proposed, which can be applied to both the genera Belemnella and Belemnitella. For the species-level taxa recognition the Artificial Neural Networks method, the self-organizing Kohonen algorithm, was implemented. This new taxonomic and methodological approach enabled the recognition of nine species of the genus Belemnella. Five of them can be assigned to the existing species B. lanceolata, B. longissima , B. inflata, B. obtusa and B. vistulensis. However, the species concept differs from that applied by Schulz (1979). As a consequence, the stratigraphic ranges of these species are modified. Four species are left in open nomenclature and represent possibly new species. Future studies may reveal that they might be assigned to East European forms from Ukraine or Russia.

The species of Belemnella recognized are placed into the stratigraphic framework based on the standard ammonite and inoceramid bivalve zonations, especially those recognized in the Vistula section. The newly proposed belemnite zonation for the Vistula and Kronsmoor sections is correlated via inoceramids with the standard GSSP at Tercis, France, in order to identify the base of the Maastrichtian Stage. The Campanian-Maastrichtian boundary as defined in Tercis is placed here at the base of the newly defined B. obtusa and B. vistulensis Zones [“obtusa/vistulensis”] - thus it is markedly higher than the traditional boundary based on the FAD of representatives of the genus Belemnella . This new boundary coincides well with a distinct turnover of belemnite guard morphology and represents one of the most important points in the early evolutionary history of Belemnella.

Three belemnite zones defined by their lower boundaries are recognized in the Campanian-Maastrichtian interval, in addition to three subzones recognized within the B. obtusa Superzone. The B. lanceolata and B. inflata zones as understood here are referred to the Upper Campanian [Tercis definition]. The B. obtusa Zone is subdivided into three subzones, viz.: Belemenlla vistulensis, Belemnella sp. G and Belemnella sp. F, which are referred to the Lower Maastrichtian [Tercis definition].

The fast evolving species of Belemnella enable the proposal of a biostratigraphic scheme with a resolution that is higher than those based on inoceramid bivalves and ammonites - the longevity of a belemnite zone could be as low as 200Ky.
Early representatives of the belemnite genus Belemnella (Cephalopoda) from the uppermost Campanian–Lower Maastrichtian of the Middle Vistula River section, central Poland
Authors: Keutgen Norbert , Remin Zbigniew , Walaszczyk Ireneusz
Published: February 2013

Keutgen, N., Remin, Z. and Walaszczyk, I. 2012. Early representatives of the belemnite genus Belemnella (Cephalopoda) from the uppermost Campanian-Lower Maastrichtian of the Middle Vistula River section, central Poland. Acta Geologica Polonica, 62 (4), 535-559. Warszawa.

Representatives of the belemnite genus Belemnella from the uppermost Campanian and lowermost Maastrichtian of the Middle Vistula River Valley section (central Poland) have been studied, using the species concept proposed by Schulz in 1979. Results have been compared to a recently proposed new interpretation of the genus Belemnella based on artificial neural networks, as put forward by Remin in 2007 and 2012. In the interval studied, four taxa have been recognised: Bln. longissima, Bln. inflata, Bln. obtusa and Bln. vistulensis, the last-named being a senior synonym of Bln. pseudobtusa. Three additional forms have been left in open nomenclature: Bln. cf. lanceolata , Bln. ex gr. lanceolata/inflata and Belemnella sp. Based on their documented vertical ranges, three Belemnella standard zones, as originally distinguished in the Kronsmoor section by Schulz (1979), northern Germany, have been defined, in ascending order: the Bln. lanceolata, Bln. vistulensis and Bln. obtusa zones. The bases of the lanceolata and obtusa zones in the Middle Vistula River Valley section can be directly correlated with the same zones at Kronsmoor, and appear to be isochronous within limits of stratigraphic resolution. The base of the vistulensis Zone (Bln. vistulensis according to the species concept of Schulz in 1979), however, is probably diachronous, being older in the Middle Vistula section. Although Schulz’s and Remin’s species concepts differ quite considerably, they do result in similar stratigraphic subdivisions of the Kronsmoor and Middle Vistula River sections.
Hexactinellid sponge assemblages across the Campanian– Maastrichtian boundary in the Middle Vistula River section, central Poland
Authors: Świerczewska-Gładysz Ewa
Published: February 2013

Świerczewska-Gładysz, E. 2012. Hexactinellid sponge assemblages across the Campanian-Maastrichtian boundary in the Middle Vistula River section, central Poland. Acta Geologica Polonica, 62 (4), 561-580. Warszawa.

The sponge fauna from the Upper Campanian-lowermost Maastrichtian succession of the Middle Vistula River valley (central Poland) is represented mainly by dictyid hexactinellid sponges (Hexactinosida and Lychniscosida). Their greatest abundance and taxonomic variability is noted in the “Inoceramus” inkermanensis Zone (Upper Campanian), and they are less diverse in the overlying (Upper Campanian) Trochoceramus costaecus Zone and lower “Inoceramus” redbirdensis Zone. In the upper “Inoceramus” redbirdensis Zone (basal Maastrichtian in the sense of the Tercis rather than the Boreal definition) they are extremely rare. With the beginning of the Maastrichtian the number of dictyid sponges gradually increases.

The observed changes in the abundance and taxonomic variability of the dictyid sponges indicate environmental changes in the latest Campanian-earliest Maastrichtian sea in the area. It seems that changes in basin bathymetry, confined to eustatic sea-level changes in the latest Campanian and early Maastrichtian, were the most important factor. Progressive shallowing of the basin in the latest Campanian drastically restricted the development of dictyids. In the peak regression, the sea level could have fallen to only several tens of metres. The gradual recovery of the sponge assemblages correlates with subsequent deepening of the basin with the start of the Maastrichtian
Using Cored Wires Injection 2PE-9 Method in the Production of Ferritic Si-Mo Ductile Iron Castings
Authors: Guzik E. , Wierzchowski D.
Published: February 2013

The results of studies on the use of modern two cored wires injection method for production of ferritic nodular cast iron (ductile iron) with use of unique implementation of drum ladle as a treatment / transport and casting ladle instead vertical treatment ladle was described. The injection of length of Ø 9mm wires, cored: in FeSi + Mg nodulariser mixture and inoculant master alloy is a treatment method which can be used to produce iron melted in coreless induction furnace. This paper describes the results and analysis of using this method for optimal production of ductile iron under specific industrial conditions. It means, that length of nodulariser wire plus treatment and pouring temperatures were optimized. In this case, was taken ductile iron with material designation: EN-GJS-SiMo40-6 Grade according EN 16124:2010 E. Microstructure of great number of trials was controlled on internally used sample which has been correlated with standard sample before. The paper presents typical ferritic metallic matrix and nodular graphite. Additionally, mechanical properties were checked in some experiments. Mean values of magnesium recovery and cost of this new method from optimized process parameters were calculated as well.
Mechanical Properties of Al-Si-Mg Alloy Castings as a Function of Structure Refinement and Porosity Fraction
Authors: Hajkowski M. , Bernat Ł. , Hajkowski J.
Published: February 2013

During design of the casting products technology, an important issue is a possibility of prediction of mechanical properties resulting from the course of the casting solidification process. Frequently there is a need for relations describing mechanical properties of silumin alloys as a function of phase refinement in a structure and a porosity fraction, and relations describing phase refinement in the structure and the porosity fraction as a function of solidification conditions. The study was conducted on castings of a 22 mm thick plate, made of EN AC-AlSi7Mg0,3 alloy in moulds: of quartz sand, of quartz sand with chill and in permanent moulds. On the basis of cooling curves, values of cooling rate in various casting parts were calculated. The paper also presents results of examination of distance between arms in dendrites of a solid solution α (DASL), precipitations length of silicon in an eutectic (DlSi) and gas-shrinkage porosity (Por) as a function of cooling rate. Statistical relations of DASL, DlSi, Por as a function of cooling rate and statistical multiparameter dependencies describing mechanical properties (tensile strength, yield strength, elongation) of alloy as a function of DASL, DlSi and Por are also presented in the paper.
The Strengthening of Weight Heavy Alloys During Heat Treatment
Authors: Kaczorowski M. , Skoczylas P. , Krzyńska A. , Kaniewski J.
Published: February 2013

The results of studies of W-Ni-Co-Fe experimental alloy, with chemical composition assuring a possibility of producing Ni-based supersaturated solid solution are presented. The alloy was prepared from tungsten, nickel, cobalt and iron powders which were first mixed then melted in a ceramic crucible where they slowly solidified in hydrogen atmosphere. Next specimens were cut from the casting and heated at a temperature 950°C. After solution treatment the specimens were water quenched and then aged for 20 h at a temperature 300°C. The specimens were subjected to microhardness measurements and structure investigations. The latter included both conventional metallography and SEM observations. Moreover, for some specimens X-ray diffractometry studies and TEM investigations were conducted. It was concluded that quenching lead to an increase of tungsten concentration in nickel matrix which was confirmed by Ni lattice parameter increase. Aging of supersaturated solid solution caused strengthening of the Ni-based matrix, which was proved by hardness measurements. The TEM observation did not yield explicit proofs that the precipitation process could be responsible for strengthening of the alloy
Alloyed White Cast Iron with Precipitates of Spheroidal Vanadium Carbides VC
Authors: Kawalec M. , Górny M.
Published: February 2013

The paper presents the results of tests on the spheroidising treatment of vanadium carbides VC done with magnesium master alloy and mischmetal. It has been proved that the introduction of magnesium master alloy to an Fe-C-V system of eutectic composition made 34% of carbides crystallise in the form of spheroids. Adding mischmetal to the base alloy melt caused 28% of the vanadium carbides crystallise as dendrites. In base alloy without the microstructure-modifying additives, vanadium carbides crystallised in the form of a branched fibrous eutectic skeleton.

Testing of mechanical properties has proved that the spheroidising treatment of VC carbides in high-vanadium cast iron increases the tensile strength by about 60% and elongation 14 - 21 times, depending on the type of the spheroidising agent used. Tribological studies have shown that high-vanadium cast iron with eutectic, dendritic and spheroidal carbides has the abrasive wear resistance more than twice as high as the abrasion-resistant cast steel.
New structure of the drive of small-diameter knitting machines
Authors: Skrivanek Josef , Bilek Martin
Published: February 2013

This paper is concerned with the drive of small-diameter knitting machines and its optimal structure in reference to the knitting process. Based on an analysis of existing machines, a new structure is proposed employing controlled drives. In this proposal, emphasis has been laid on minimising the consumption of electric power and on simplifying the mechanical section of the structure. An analysis of the dynamic characteristics of the newly proposed concept, and a comparison with existing machines has been carried out.
Colorizing Educational Research
Authors: Monroe Carla R.
Published: February 2013

Although previous authors have offered persuasive arguments about the salience of race in the scholastic enterprise, colorism remains a relatively underexplored concept. This article augments considerations of social forces by exploring how color classifications within racial arrangements frame pathways for communities of color and, therefore, must inform educational inquiries. Consistent with the rich tradition of ethnic studies, I draw on sources in the humanities, legal profession, and social sciences to demonstrate how colorism surfaces in lived experiences. The African American community is used as an exemplar for illustrating historical foundations of color bias, discussing implications of complexion difference, and offering suggestions for scholarship that advances educational research agendas.
Friendships between Men across Sexual Orientation: The Importance of (Others) Being Intolerant
Authors: Barrett Timothy
Published: February 2013

Drawing upon qualitative interview data examining friendships between men across sexual orientation, this article contributes to the emergent literature surrounding the performance and articulation of “inclusive masculinities” (Anderson, 2009). Research participants demonstrated a substantial departure from many of the anxieties or conflicts historically associated with relationships between gay and straight men, such as attitudes toward “coming out,” bodily touch, and the gay interviewees' partners. This article offers a more critical approach to empirical accounts of “inclusive masculinities.” In particular, it examines how participants reproduced historically denigrating understandings of working-class life in their performances of tolerance. This abjection of an imagined working-class “intolerant other” played a substantial role in the production of middle-class interviewee selves, and facilitated the accumulation of particular forms of cultural capital.