bluuebunny/crossref_metadata_2025 huggingface dataset:
High Temperature Rheometric Measurements of Mould Powders
Authors: Ślęzak W. , Korolczuk-Hejnak M. , Migas P.
Published: April 2015

Issues of viscosity and rheological properties of powder moulds are important from the perspective of modelling, along with the control of continuous casting process. Conducted analysis within subject literature indicates that there are many theoretical considerations concerning the effects of viscosity of powder moulds. The objective of this study was to perform rheological measurements of powder moulds, the study contains the results of rheological tests of seven chemical compositions with a carbon content from 5.0 to 10.7% and which were tested with applied shear rates from 10 to 40 s-1, which are similar to those in a real process: the velocity of strand passes/drawing and mould movements.
Two-Criteria Analysis of Casting Technologies of Metal and Composite Foams
Authors: Gawdzińska K. , Gucma M.
Published: April 2015

The determination of potential areas of application for metal foams allows to precisely define properties these materials are expected to have. The characteristics of metal foams are strictly related to their cellular structure, which in turn depends on the manufacturing method and materials used. Obviously, metal foam producers should strive to make these materials using inexpensive, or cost-effective technologies, yielding possibly good quality and being environment-friendly. This paper briefly characterizes the manufacturing of metal and composite foams by casting methods. We determine an optimal manufacturing method based on a matrix diagram for metal and composite foams satisfying the two - criteria: “manufacturing costs” (depending on the price of production equipment and labour, cost of materials for foam manufacturing, environmental impact) and “foam quality” (depending on the manufacturing precision, homogeneity of the structure, pore size, shape, and volumetric fraction).
Methodology for the Construction of a Rule-Based Knowledge Base Enabling the Selection of Appropriate Bronze Heat Treatment Parameters Using Rough Sets
Authors: Górny Z. , Kluska-Nawarecka S. , Wilk-Kołodziejczyk D. , Regulski K.
Published: April 2015

Decisions regarding appropriate methods for the heat treatment of bronzes affect the final properties obtained in these materials. This study gives an example of the construction of a knowledge base with application of the rough set theory. Using relevant inference mechanisms, knowledge stored in the rule-based database allows the selection of appropriate heat treatment parameters to achieve the required properties of bronze. The paper presents the methodology and the results of exploratory research. It also discloses the methodology used in the creation of a knowledge base.
Investigations of Physicochemical Properties and Thermal Utilisation of Dusts Generated in the Mechanical Reclamation Process of Spent Moulding Sands
Authors: Dańko R. , Holtzer M. , Dańko J.
Published: April 2015

The after reclamation dusts originated from various foundry plants, applying moulding sands with organic binding agents, mostly resins, are characterised by different properties in dependence of the used binders, reclamation systems, spent sands overheating degree and the efficiency of the system dedusting the reclaimed material operating in individual foundry plants.

In the article the results of investigations of physicochemical properties and thermal utilisation possibility referring to six kinds of after reclamation dusts generated in the mechanical reclamation process of spent moulding sands with furfuryl resins and six other kinds of after reclamation dusts obtained from reclamation process of spent moulding sands with alkaline resins have been presented. All tested dusts originated from various Polish foundry plants of cast iron and cast steel applying the mechanical reclamation process of moulding sands with resins, obtained from different producers.
The Concept of Slag Decopperisation in the Flash Furnace Process by Use of Complex Reagents
Authors: Bydałek A.W. , Bydałek A. , Wołczyński W. , Biernat S.
Published: April 2015

The article presents an outline of the new technology of pyrometallurgical processing of slag in the direct-to-blister process. The analysis is based on the example of the production process of KGHM Polish Copper SA. A new way of implementing the technology of recovery of copper from the flash furnace slag by means of different feedstocks has been proposed. The method of controlling the processes is another innovation discussed in the paper. The presented concept intensify the reduction reactions, using the Carbo-N-Ox method, of copper compounds to forms of metallic phases in the slag. The processes of coagulation are accelerated and the processes crystallization of metallic phases are under control.
Harmfulness Assessment of Moulding Sands with a Geopolymer Binder and a New Hardener, in An Aspect of the Emission of Substances from the Btex Group
Authors: Bobrowski A. , Holtzer M. , Żymankowska-Kumon S. , Dańko R.
Published: April 2015

The harmfulness assessment of moulding sands with a geopolymer binder and a new hardener, in an aspect of the emission of substances from the BTEX group, was performed. Within the expedience project the new series of hardeners for the inorganic GEOPOL binder was developed. Before the introduction of the new system of moulding sands it was necessary to estimate their influence on the environment. To this aim the gasses emission from moulding sands subjected to the influence of liquid cast iron was tested with regard to the content of the gases from the BTEX group (benzene, toluene, ethylbenzene and xylenes). For the comparison the analogous investigations of the up to now applied moulding sands with the geopolymer binder, were performed. It was found that both systems of moulding sands binding emit similar amounts of gases, as well as similar amounts of substances from the BTEX group. Moulding sands with the GEOPOL binder are much more environmentally friendly than moulding sands with organic binders. The content of the BTEX group substances in gases emitted from moulding sands with the GEOPOL binder was approximately 10-times lower than in case of the moulding sands with organic binders.
Evaluation of Physical Properties of Wax Mixtures Obtained From Recycling of Patterns Used in Precision Casting
Authors: Biernacki R. , Haratym R. , Bałkowiec A. , Wawulska-Marek P. , Matysiak H. , Zdunek J. , Kurzydłowski K. J.
Published: April 2015

The study investigated the properties of selected certified mixtures used to make wax patterns for the production of precision castings for the aerospace industry. In addition, an assessment of the recycled mixtures consisting of certified wax materials recovered during autoclaving was carried out. Hardness was tested via a proposed method based on penetration, creep related deformation, bending strength and linear contraction. The hardness was studied on laboratory specimens and patterns made with the use of injection molding equipment. For these patterns, linear contraction was estimated at variable pressure and for different temperature injection parameters. Deformations connected with creep and resistance were evaluated on cylindrical specimens. Differences in creep resistance in relation to the hardness were observed depending on the type of pattern mixtures. Recycled mixture has a greater resistance and smaller linear contraction than certified mixtures used for making sprue, raisers and other parts of filler system.
The Internal Friction of Single Crystals, Bicrystals and Polycrystals of Pure Magnesium
Authors: Jiang W.B. , Kong Q.P. , Magalas L.B. , Fang Q.F.
Published: April 2015

The internal friction of magnesium single crystals, bicrystals and polycrystals has been studied between room temperature and 450°C. There is no internal friction peak in the single crystals, but a prominent relaxation peak appears at around 160°C in polycrystals. The activation energy of the peak is 1.0 eV, which is consistent with the grain boundary self-diffusion energy of Mg. Therefore, the peak in polycrystals can be attributed to grain boundary relaxation. For the three studied bicrystals, the grain boundary peak temperatures and activation energies are higher than that of polycrystals, while the peak heights are much lower. The difference between the internal friction peaks in bicrystals and polycrystals is possibly caused by the difference in the concentrations of segregated impurities in grain boundaries.
Grain Boundary Relaxation in Bi-Crystals: Mechanical Spectroscopy and Molecular Dynamics Simulations
Authors: Maier A.-K. , Mari D. , Tkalcec I. , Schaller R.
Published: April 2015

Different Au-Ag-Cu samples have been studied by mechanical spectroscopy. Both polycrystals and bi-crystals show a relaxation peak at 800 K, accompanied by an elastic modulus change. Since this peak is absent in single crystals it is related to the presence of grain boundaries. Molecular dynamics simulations reveal two microscopic mechanisms, when a shear stress is applied onto a Σ5 grain boundary: at 700 K, the boundary migrates perpendicularly to the boundary plane under an external stress. At 1000 K, only sliding at the boundary is observed. These two mechanisms acting in different temperature intervals are used to model the mechanic response of a polycrystal under an applied stress. The models yield expressions for the relaxation strength Δ and for the relaxation time τ as a function of the grain size. A comparison with the mechanical spectroscopy measurements of polycrystals and the bi-crystals show that the grain boundary sliding model reproduces correctly the characteristics of the grain boundary peak.
Low Frequency Mechanical Spectroscopy Study of Three Pyrrolidinium Based Ionic Liquids
Authors: Trequattrini F. , Paolone A. , Palumbo O. , Vitucci F.M. , Navarra M.A. , Panero S.
Published: April 2015

In this work we present our recent results on three ionic liquids (ILs), which share bis(trifluoromethanesulfonyl)imide (TFSI) as anion and have different pyrrolidinium based cations. By means of a combination of mechanical spectroscopy and thermal analysis, many of the physical processes occurring during cooling down from the liquid phase, can be studied. Depending both on the diverse cation and the different thermal history, crystallization from the melt or glass transition, cold-crystallization, solid-solid phase transitions and thermally activated processes are observed. In one of the ILs, which could be easily undercooled, a prominent thermally activated peak could be observed above the glass transition. The temperature dependence of the relaxation time is approximated by a Vogel-Fulcher-Tamman equation, as usual for fragile glass forming liquids, and the apparent activation energy of W = 0.36 eV with a pre-exponential factor of the relaxation time τ0 = 1.7 · 10−13s were derived supposing jumps between asymmetrical potential wells. The kinetics of the crystallization processes have been studied in the framework of the Johnson-Mehl-Avrami-Kolmogorov theory and the Avrami parameters have been derived for both the crystallization from the melt and for the cold crystallization observed on heating.
Braze Welding of Elements of Industrial Fittings
Authors: Słania J. , Golański G. , Gasz W.
Published: April 2015

Resistance to stretching, a quality of specimen made by braze welding method were examined as well as usefulness of this method in industry was described. Technology and materials, which are used during braze welding, are depicted on the base of an inspection of joints. The results of macroscopic examinations of sample joints (base material, heat-affected zone and braze weld) are given. Furthermore, the results of the resistance, plasticity and hardness tests of sample joints are presented.
Application of Numerical and Physical Simulation to Design of the Best Manufacturing Technology for Fasteners
Authors: Kusiak J. , Skóra M. , Rauch Ł. , Szeliga D. , Pietrzyk M.
Published: April 2015

The development of the best manufacturing technology for fasteners was the subject of this work. Physical and numerical simulations were used to evaluate various technological variants. Possibility of application of new generation bainitic steels was considered, as well. Improvement of exploitation properties was the objective of the optimization having in mind tool wear and manufacturing costs as constraints. Several fasteners were investigated but results for three parts, including Allen screw, screw anchors used to carry concrete plates are presented as a case study. Industrial trials were performed and confirmed correctness of the designed manufacturing technology.
The Influence of the Shape of Grooves on the Intensity of Closing Axial Material Discontinuities During Rolling
Authors: Sobczak K. , Dyja H. , Kawałek A.
Published: April 2015

The article discusses the influence of rolling in the newly designed slitting-bending grooves on closing internal material discontinuities in continuous ingots. The defects located in the axial area of a strand, i.e. axial porosity and contraction cavity, were analysed. Numerical and experimental studies of the rolling process of flat bars for feedstock with marked materials discontinuities simulating actual defects occurring in an ingot were conducted. For comparison purposes, rolling of feedstock with discontinuities in traditional grooves was conducted. The numerical simulations were carried out using the Forge 2008¯software programme. The experimental studies were conducted in a D150 laboratory rolling mill. In the research, the S355J2G3 structural steel and lead were used. Distributions of temperature, intensity of deformation and stress in a cross-section of strands after rolling were analysed. Changes in the surface areas of the discontinuities in feedstock after rolling in shape and traditional grooves were examined.

It was concluded that introduction of grooves with complex shapes may contribute to the improvement of internal quality of finished products. The complex shape of the tools has allowed for an almost 100% closure of the discontinuities located in the central part of a strand, already at the initial stages of the process, unlike in case of the traditional production method, where the discontinuities were transferred even until the final product. Applying the newly designed slitting-bending grooves enables utilisation of a smaller number of edge grooves at the initial stage of the rolling process, where reopening of freshly welded defects might occur.
Weldability of Thermomechanically Treated Steels Having a High Yield Point
Authors: Górka J.
Published: April 2015

The article concerns the issue of weldability of S700MC steel, treated thermo-mechanically, with high yield point. The weakest area of welded joints of this steel is a high - temperature coarse heat affected zone (HAZ) in which due to the nucleation effect of the dissolved phases, strengthening the matrix and their subsequent uncontrolled separation precipitation in the form of finely disperse and rapid decrease impact strength is observed. Performed arc welding tests here have shown that in order to ensure high quality of welded joints, it is necessary to limit the welding linear heat input. During the welding process of S700MC steel, it is not recommended to use pre heating before the welding process and heat treatment after welding, and the number of repairs should be kept to a minimum, because it leads to a reduction of strength and plastic properties in the HAZ area, as a result of aging processes, dissolution of strengthening phases in the matrix and their subsequent uncontrolled precipitation during cooling.
An Attempt to Develop the Methodology of Examining the Boron Content in Construction Materials with the Use of Eds Method
Authors: Popławski M. , Kwiatkowska A. , Piasecki A.
Published: April 2015

Borided layers are mainly produced during the process of heat-chemical treatment as a result of reactive diffusion of boron inside the material. The borided layers are particularly useful in difficult exploitation conditions. Generally, the borided layers are characterized by the increased hardness, heat resistance and good corrosion resistance. It is commonly known that the major disadvantage of X-ray microanalysis with EDS method is the difficulty in light elements analysis such as boron.

However, due to the appropriate formation of source region and taking measurements during a definite period of time, the microanalysis of boron is possible. The obtained results are characterized by relative accuracy and precision.

SEM Vega 5135 Tescan, detector of Si(Li) in Prism 2000 PGT spectrometer and the PGT software Spirit 1.06 were used. The model specimen was made from cubic boron nitride (c-BN). The estimated parameters of the analysis were verified on 42CrMo4 steel and borided Armco Iron, with satisfactory results having been obtained.
Effect of Phenomena Accompanying Wear in Dry Corundum Abrasive on the Properties and Microstructure of Austempered Ductile Iron with Different Chemical Composition
Authors: Myszka D. , Wieczorek A.
Published: April 2015

The research described in this article is a fragment in the series of published works trying to determine the applicability of new materials for parts of the mining machinery. Tests were performed on two groups of austempered ductile iron - one of which contained 1.5% Ni and 0.5% Mo, while the other contained 1.9% Ni and 0.9% Cu. Each group has been heat treated according to the three different heat treatment variants and then the material was subjected to detailed testing of mechanical properties and abrasion wear resistance, measuring also hardness and magnetic properties, and conducting microstructural examinations. The results indicated that each of the tested materials was senstive to the surface hardening effect, which resulted in high wear resistance. It has been found that high temperature of austempering, i.e. 370°C, favours high wear resistance of ductile iron containing nickel and molybdenum. Low temperature of austempering, i.e. 270°C, develops high wear resistance in ductile iron containing nickel and copper. Both these materials offer completely different mechanical properties and as such can be used for different and specific applications.
Nanocrystalline Steels’ Resistance to Hydrogen Embrittlement
Authors: Skołek E. , Marciniak S. , Skoczylas P. , Kamiński J. , świątnicki W.A.
Published: April 2015

The aim of this study is to determine the susceptibility to hydrogen embrittlement in X37CrMoV5-1 steel with two different microstructures: a nanocrystalline carbide-free bainite and tempered martensite. The nanobainitic structure was obtained by austempering at the bainitic transformation zone. It was found, that after hydrogen charging, both kinds of microstructure exhibit increased yield strength and strong decrease in ductility. It has been however shown that the resistance to hydrogen embrittlement of X37CrMoV5-1 steel with nanobainitic structure is higher as compared to the tempered martensite. After hydrogen charging the ductility of austempered steel is slightly higher than in case of quenched and tempered (Q&T) steel. This effect was interpreted as a result of phase composition formed after different heat treatments.
Cooperative Navigation in a Team of Marine Robots for a Specific Ocean Mapping Mission
Authors: Glotzbach Thomas , Eckstein Sebastian , Ament Christoph
Published: April 2015

The estimation of position and orientation of underwater agents is the basis for control, guidance and mapping tasks. We present
a solution for a team of submerged marine agents for a specific scenario. The concept takes advantage of the distribution of the single
agents, with one of them at the surface to access GPS measurements. The submerged units use data from a USBL unit, local sensors, and
acoustic communication and employ a set of filters to perform relative navigation. We will describe the concept and show results of HIL
simulation as precondition for upcoming sea trials.
Precise Maneuver Planning for Berth-to-Berth Navigation of Modern Ships
Authors: Korte Holger , Koeckritz Oliver , Kurowski Martin
Published: April 2015

Modern steering devices for ships lead to an improved control capability and allow independent actions without tugs by mates in use
with modern electronics. Within the project AdaNav developed MIMO controller enables DP equivalent functions for ships being able to
traverse. The following contribution shows the inclusion of such modern maneuvering quality as computer based assistance system into
electronic ship guidance systems like ECDIS. To guarantee fully responsibility of mates the concept bases on introduced planning
practice implementing additional waypoints and attributes.
Limiting Profit Shifting in a Model with Heterogeneous Firm Productivity
Authors: Langenmayr Dominika
Published: April 2015

This paper analyzes measures that limit firms’ profit shifting activities in a model that incorporates heterogeneous firm productivity and monopolistic competition. Such measures, e.g. thin capitalization rules, have become increasingly widespread as governments have reacted to growing profit shifting activities of multinational companies. However, besides limiting profit shifting, such rules entail costs. As the regulations can only focus on the means to shift profits, not on profit shifting itself, they impose costs on all firms, no matter whether these firms shift profits abroad or not. In the model, these costs force some firms to exit the market. Thus, as the resulting lower competition makes the remaining firms more profitable, regulations to limit profit shifting may even increase the aggregate amount of profits shifted abroad. From a welfare point of view, it can be optimal not to limit profit shifting by such rules.
Remarks on commutators in finite groups
Authors: Deaconescu Marian , Walls Gary
Published: April 2015

The main result of this paper is a formula, in terms of characters, for the number of elements of a normal
subgroup H of a finite group G which are not commutators in G.
k-step nilpotent Lie algebras
Authors: Goze Michel , Remm Elisabeth
Published: April 2015

The classification of complex or real finite dimensional Lie algebras which are not semi simple is still in its early stages. For example, the nilpotent Lie algebras are classified only up to dimension 7. Moreover, to recognize a given Lie algebra in the classification list is not so easy. In this work, we propose a different approach to this problem. We determine families for some fixed invariants and the classification follows by a deformation process or a contraction process. We focus on the case of 2- and 3-step nilpotent Lie algebras. We describe in both cases a deformation cohomology for this type of algebras and the algebras which are rigid with respect to this cohomology. Other p-step nilpotent Lie algebras are obtained by contraction of the rigid ones.
Note on the differentiability of singular Lebesgue–Stieltjes measures
Authors: Chubinidze Kakha A. , Oniani Giorgi G.
Published: April 2015

For an arbitrary translation invariant basis B which does not differentiate an integral of some function, we construct a singular Lebesgue–Stieltjes measure having non-vanishing means with respect to B at almost every point.
Using polycarbonate dyed with dansyl chloride for dosimetry in radiation processing
Authors: Feizi Shazad , Ziaie Farhood , Ghandi Mehdi
Published: April 2015

Preparation and characteristics evaluation of the polycarbonate films 20 μm in thickness containing Dansyl chloride as
a routine dosimeter in radiation processing facilities were studied. The sensitivity of these films and the linearity of dose-response
curves were investigated under 60Co γ-rays in a dose range of 0–100 kGy, and the obtained results were
compared with the commercial CTA and FWT film dosimeters. The results show that the maximum absorbance appeared at 370 nm in
all the investigated dose range. The dyed films were found to be stable enough in mediums with high degrees of humidity and
temperature, to be reliably used in radio-applications. The effects of pre-irradiation (shelf-life) and post-irradiation storage in
dark and in indirect sunlight were also discussed. The films which were made displayed stable characteristics when stored in dark,
within 1% at 25 ℃, 3 months after irradiation.
Deriving individual-level and stage-level psych verbs in Spanish
Authors: Fábregas Antonio , Marín Rafael
Published: April 2015

Aspectual notions, although displayed most clearly in verbs, manifest across categories, with notions like (un)boundedness manifesting themselves in several instantiations which are sometimes specific of individual grammatical categories. This paper contributes to the ongoing debate on how aspectual notions emerge in different categorial domains by an analysis of subject-experiencer and object-experiencer psychological predicates (SEPVs and OEPVs, respectively). We review the evidence that SEPVs denote individual level (IL) states, and provide new facts – taken from the behaviour of participles – in favour of that diagnostic; we also argue that OEPVs should be classified as states of the stage level (SL) class. We argue that OEPVs denote states with an onset, which corresponds to the denotation of SLs. SEPVs simply denote states without boundaries, which we argue to correspond to IL predicates. Finally, we show how these two denotations follow without further assumptions from the structures proposed for SEPVs and OEPVs in previous work, specially Pesetsky (1995), making it unnecessary to postulate that the distinction is of lexical nature.
Linkers and agreement
Authors: Ludovico Franco , Manzini M. Rita , Savoia Leonardo M.
Published: April 2015

In many languages a linker element is inserted between a noun N and a modifier or a complement of N. We focus on Albanian articles and on Iranian ezafes, and we introduce comparison data from Aromanian. In section 2, we provide arguments as to why currently available formal theories of linkers (as copulas, as case assigners, as means for identity avoidance) face problems when applied to Albanian or Kurdish. In section 3 we argue, on the basis of morphological, syntactic and interpretive evidence, that linkers (at least in the languages considered) form a constituent with the A(P) that follows them and that their category is D. Section 4 contains the theoretical core of the discussion. A linker D and a determiner D have in common the fact that they are both able to satisfy argument slots of a predicative head (e.g. A). However a D closing off a DP is an operator, establishing a relation between a restrictor (the NP) and a domain of quantification (a VP). A linker D is a bound variable – it provides a satisfaction for a theta-role ultimately bound by the higher D. A cross-linguistic typology of determiners, linkers and pronominal clitics based on this analysis is provided. In section 5 we extend the analysis to pre-genitival linkers, treating genitive case as an elementary part-whole relation, of which the linker saturates the external argument (the possessum).
Emerging NPIs: The acquisition of Dutch hoeven ‘need’
Authors: Lin Jing , Weerman Fred , Zeijlstra Hedde
Published: April 2015

Dutch modal verb
Chrismukkah: Millennial Multiculturalism
Authors: Mehta Samira K.
Published: April 2015

Chrismukkah and its increased public presence marked a shift in the public discourse around Christian–Jewish interfaith families in the United States in the years surrounding the turn of the millennium. In children's literature, greeting cards, humor books, on television and in blogs, interfaith families who practiced elements of both Christianity and Judaism constructed a multicultural identity by the strategic reframing of practices from both backgrounds. Rather than understanding this identity as based in a failure to choose one religious practice over another, multicultural interfaith families argued that their blended practices both reflected an unavoidable reality and offered distinct advantages and moral formation to their families. “Religion,” as used by these multicultural families, becomes the domain of religious institutions, with membership lists and competing truth claims. “Culture,” their preferred term, denotes practices that are equivalent and can exist simultaneously in the lives of families and individuals. The article argues that interfaith families who practice both traditions use language of multiculturalism to create a space for such choices to be framed as morally cohesive. This multicultural framing then re-casts these practices, re-inscribing them with values of tolerance and minimization of difference rather than the theological and historical content ascribed by many of the religious institutions that these families avoid.
Go protein subunit Goα and the secretory process of the natriuretic peptide hormones ANF and BNP
Authors: Roeske Cassandra , Martinuk Amy , Choudhry Asna , Hendy Geoffrey N , Gollob Michael , Li Qiuji , Georgalis Tina , de Bold Adolfo J
Published: April 2015

Expression of the G protein subunit Goα has been shown to be prominent in the atria of the rat heart and to be significantly associated with atrial natriuretic factor (ANF)-containing atrial-specific secretory granules by immunocytochemistry. In addition, differential expression profile analysis using oligonucleotide arrays has shown that the Goα isoform 1 (Goα1) is 2.3-fold more abundant in the atria than it is in the ventricles. In the present report, we show protein–protein interaction between Goα and ANF by yeast two-hybrid and by immunoprecipitation. A cardiac conditional Goα knockout model developed for the present study showed a 90% decrease in Goα expression and decreased atrial expression and ANF and brain natriuretic peptides (BNP) content. Expression of chromogranin A, a specific atrial granule core constituent, was not affected. Morphometric assessment of atrial tissue showed a very significant decrease in atrial-specific granule density as well as granule core electron density. Atrial electrical activity was not affected. The results obtained are compatible with the suggestion that Goα plays a role in ANF sorting during intracellular vectorial transport and with the presence of a mechanism that preserves the molar relationship between cellular ANF and BNP stores in the face of the decreased production of these hormones.
Pratarmė
Authors: Van Mensch Peter
Published: April 2015

Turėdama apie 110 muziejų, besirūpinančių maždaug 6,5 milijono muziejinių objektų, Lietuva gali didžiuotis įvairiu ir adekvačiu muziejų tinklu. Tačiau tai dar nereiškia, kad situacija yra visiškai normali. 1990 metų perėjimo laikotarpis paliko neišspręstų klausimų, vienas iš jų–atsakingų institucijų požiūris į muziejų socialinį vaidmenį ir atitinkamas jų veiklos finansavimas. Remiantis visapuse Lietuvos muziejų analize, šia studija išreiškiama tvirta pozicija dėl muziejų kaip atminties institucijų potencialo informacinėje visuomenėje. [...]
Skaitmeninių technologijų taikymas Lietuvos muziejuose 1990–2011 metais
Authors: Kapleris Ignas
Published: April 2015

XX a. vid. Vakarų šalyse prasidėjusi sparti skaitmeniniu dvinariu kodavimu pagrįstų technologijų raida lėmė daug didelių pokyčių visose žmonių veiklos sferose. Dalis mokslininkų tokias permainas lygina su informacijos revoliucija ir naujos, žinių gamyba paremtos tinklaveikos visuomenės formavimosi pradžia (Castells, 2005). Skaitmeninių technologijų poveikio neišvengė ir su kultūra glaudžiai susijusi atminties institucija – muziejus. [...]
Muziejaus komunikacija su suinteresuotaisiais: kokie muziejaus veiklos aspektai svarbūs muziejaus prisistatymui ir įvaizdžio formavimui?
Authors: Matkevičienė Renata , Aleksandravičius Arnas
Published: April 2015

Šiandienėje visuomenėje muziejai yra ta institucija, kuri, būdama kultūrinė (užtikrina kultūros ir istorijos tęstinumą, paveldo išsaugojimą ir jo komunikaciją, skatina kultūrinio kolektyvinio identiteto ir vertybių išsaugojimą ir pan.) ir kartu kūrybinė (skatina kūrybiškumo raišką, užsiima kūrybine veikla, t. y. rengia edukacinius projektus, parodas ir ekspozicijas įvairia veikla, pavyzdžiui, parodų katalogais, edukacinės veiklos rezultatais ir kt.,) industrija, turi iš naujo atrasti savo vietą moderniųjų technologijų (arba, remiantis M. Castellsu, tinklaveikos) ir vartotojiškoje visuomenėje. [...]
Socialinių medijų taikymas muziejų komunikacijoje: naujosios muziejininkystės aspektas
Authors: Šuminas Andrius , Armonaitė Veta
Published: April 2015

Muziejumi vadinama institucija, kuri mokslo, edukacijos ir laisvalaikio organizavimo tikslais įgyja, kaupia, tyrinėja, populiarina ir eksponuoja žmonijos ir aplinkos materialųjį ir nematerialųjį paveldą (Keršytė, 2009).LR muziejų įstatyme teigiama, kad „svarbiausia muziejų veikla yra kaupti, saugoti, restauruoti, tirti, eksponuoti bei populiarinti materialines ir dvasines kultūros vertybes bei gamtos objektus“ (LR muziejų įstatymas, 2010). Nors ilgai muziejai buvo suvokiami tik kaip kolekcionavimo, konservavimo ir tyrimų institucijos, XX a. pab. pradėta kalbėti, kad muziejai turi rūpintis savo socialine funkcija visuomenėje ir edukaciniais bei kultūriniais veiksniais. 1974 m. Kopenhagoje įvykusioje Tarptautinės muziejų tarybos Generalinėje asamblėjoje buvo priimta rezoliucija, kurioje skelbiama, kad muziejai turi transformuotis ir keistis, atsižvelgdami į savo bendruomenės poreikius. Rezoliucijoje teigiama, kad tyrimai, eksponatų konservavimas ir išsaugojimas turi ir toliau būti tradicinės ir svarbios muziejaus funkcijos, tačiau sparčiai kintančio pasaulio aplinkybės verčia prisiimti naujų įsipareigojimų ir formų (Van Mensch, 1992). [...]
Maternal Prepregnancy Body Mass Index and Child Psychosocial Development at 6 Years of Age
Authors: Jo Heejoo , Schieve Laura A. , Sharma Andrea J. , Hinkle Stefanie N. , Li Ruowei , Lind Jennifer N.
Published: April 2015

BACKGROUND:

Both obesity and developmental disabilities have increased in recent decades. Limited studies suggest associations between maternal prepregnancy obesity and child neurodevelopment.

METHODS:

The Infant Feeding Practices Study II, a US nationally distributed longitudinal study of maternal health and infant health and feeding practices, was conducted from 2005 to 2007. In 2012, mothers were recontacted for information on their children’s health and development. We examined associations between maternal prepregnancy BMI and child psychosocial development in 1311 mother–child pairs included in this follow-up study. Children’s development was assessed by maternal report of child psychosocial difficulties from the Strengths and Difficulties Questionnaire, past developmental diagnoses, and receipt of special needs services.

RESULTS:

Adjusting for sociodemographic factors, children of obese class II/III mothers (BMI >35.0) had increased odds of emotional symptoms (adjusted odds ratio [aOR] 2.24; 95% confidence interval [CI], 1.27–3.98), peer problems (aOR 2.07; 95% CI, 1.26–3.40), total psychosocial difficulties (aOR 2.17; 95% CI, 1.24–3.77), attention-deficit/hyperactivity disorder diagnosis (aOR 4.55; 95% CI, 1.80–11.46), autism or developmental delay diagnosis (aOR 3.13; 95% CI, 1.10–8.94), receipt of speech language therapy (aOR 1.93; 95% CI, 1.18–3.15), receipt of psychological services (aOR 2.27; 95% CI, 1.09–4.73), and receipt of any special needs service (aOR 1.99; 95% CI, 1.33–2.97) compared with children of normal weight mothers (BMI 18.5–24.9). Adjustment for potential causal pathway factors including pregnancy weight gain, gestational diabetes, breastfeeding duration, postpartum depression, and child’s birth weight did not substantially affect most estimates.

CONCLUSIONS:

Children whose mothers were severely obese before pregnancy had increased risk for adverse developmental outcomes.
A 2-Year-Old With 4 Weeks of Daily Fever
Authors: Darby John B. , Liddell Lucette , DeGuzman Marietta , McClain Kenneth L. , Rubenstein Jared , Chase Lindsay , Marquez Lucila
Published: April 2015

A 2-year-old female presents for evaluation of 4 weeks of daily fevers. When the fevers began, she had mild upper respiratory tract symptoms, which quickly resolved. The fevers persisted, however, with a maximum of 40°C. The child’s review of symptoms was significant for a 1-kg weight loss over the past month. Ten months before presentation, she had moved from Saudi Arabia with her family. One week before the onset of symptoms, she had visited a petting zoo. During episodes of fever, the patient was ill-appearing and had an elevated heart rate and respiratory rate. On examination, she was found to be thin, febrile, tachycardic, and with scattered lymphadenopathy. Results of laboratory tests were remarkable for an elevated white blood cell count of 16 100 cells per uL with a neutrophilic predominance. Erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) were elevated at 99 mm/h and 27 mg/dL, respectively. A chest radiograph indicated a small amount of fluid in the interlobar fissures. Our expert panel examines her case, offers a definition of fever of unknown origin, and makes diagnostic considerations.
Anurans of the Agudos and Jaú municipalities, state of São Paulo, Southeastern Brazil
Authors: Maffei Fábio , Nascimento Bruno Tayar Marinho do , Moya Guilherme Marson , Donatelli Reginaldo José
Published: April 2015

We present a list of amphibian species from the Agudos and Jaú municipalities, a Midwest region of São Paulo state, Brazil. The 26 species recorded exhibited a strong seasonality, with their reproductive periods concentrated in the rainiest months (October and December).  Most of the species (88%) are generalists and typically associated with open areas. Although none of the species to be associated exclusively forest environments, the occurrence of some species (12%) depends on the proximity of water bodies for environments with forest formation. Thus, the presence of riparian forest fragments near water bodies is essential for some populations, as these sites are refuge for some species.
Self-protective Oxide Nano-Coatings for Enhanced Surface Biocompatibility of Titanium
Authors: Ozdemir Zeynep , Craciun Valentin , Basim Bahar
Published: April 2015

The biocompatibility of an implant material depends on the bulk physical properties in addition to the surface properties. In biomedical engineering and industry Ti and Ti-alloys are very popular biological implant material for their bulk physical properties and strength to weight ratio resembling those of nature bone. It is possible to modify the surface properties of titanium for enhanced surface biocompatibility. The main objective of the this study is to engineer a smart Ti-based prosthesis surface by self induced chemically modified titanium oxide nano-film by the chemical mechanical polishing process (CMP). This new process applied on bio-implants aims at significantly reducing the out-diffusion of Ti and other metallic impurities from prosthesis in contact with body fluids and tissue and simultaneously enhancing the surface mechanical, chemical and biological properties. CMP technique enables the growth of a thicker and denser self-protective native oxide on Ti and Ti alloy samples, while simultaneously inducing a controlled surface roughness. It is demonstrated that the Ti based dental implants with self-protective oxide induced surfaces help minimize chemical and bacterial reactivity in addition to Ti ion dissolution while promoting their biocompatibility through surface patterning. The studied self-protective oxide films can also be utilized for many additional applications including bio-sensors.
Colapso induzido pelo exercício em um Labrador Retriever
Authors: Basso Roberta Martins , Oliveira-Filho José Paes de , Palumbo Mariana Isa Poci , Zakia Luiza Stachewski , Araújo Júnior João Pessoa , Borges Alexandre Secorun
Published: April 2015

O colapso induzido pelo exercício (EIC) é uma enfermidade hereditária caracterizada por fraqueza muscular, dificuldade de locomoção e colapso após atividade física intensa. Esta enfermidade autossômica recessiva afeta principalmente cães jovens da raça Labrador Retriever e decorre da mutação c.767G>T no gene codificador da proteína dinamina 1 (DNM1). O objetivo deste trabalho é relatar o primeiro caso de EIC em Labrador Retriever no Brasil. O teste molecular para detectar a mutação responsável pela EIC confirmou o diagnóstico clínico em um Labrador Retriever com histórico de fraqueza muscular e colapso após exercício. Uma vez diagnosticada no Brasil, ressalta-se a importância de inserir a EIC entre os diagnósticos diferenciais das enfermidades neuromusculares em cães da raça Labrador Retriever e utilizar o diagnóstico molecular para orientar os acasalamentos.
Composting Reduces Seed Viability of Garlic Mustard (Alliaria petiolata) and Common Buckthorn (Rhamnus cathartica)
Authors: Van Rossum Joseph , Renz Mark J.
Published: April 2015

Composting is a common practice for management of herbaceous yard materials and other decomposable materials. Although composting is promoted by state agencies for many materials, a notable exception is invasive plants due to concerns about spreading propagules with the finished product. To address this issue, we measured the viability of garlic mustard and common buckthorn seeds exposed to turned or static composting methods. Piles were built in 2012 and 2013, and seeds from both species were inserted and monitored for viability. Seed viability was reduced rapidly regardless of year, composting method, or species. Viability of seeds was zero within 7 and 15 d of composting for garlic mustard and common buckthorn, respectively, in both years. Results indicate that composting facilities are able to render the seeds of these invasive plants nonviable using either composting method because inactivation is within the composting timeframes typically practiced by the industry. This includes the process to further reduce pathogens (PFRP) with thresholds of 55 C for 15 d for the compost management process used for this trial.
Session report: similitude, scaling and education
Authors: Lee Fook-Hou
Published: April 2015

The session on ‘Similitude, scaling and education’ at the 8th International Conference on Physical Modelling in Geotechnics 2014 contained papers covering history of centrifuge modelling, scaling and modelling issues as well as the use of centrifuge modelling in education. A recurrent issue in this session was how realistic should one be, or can one afford to be, in physical modelling.
New Quito airport, Ecuador: high-flying success via collaboration
Authors: Chalk Chris , Beare David
Published: April 2015

Set at 8500 ft (2590 m) high in the Ecuadorian Andes the New Quito International Airport, opened in February 2013, is a landmark both in airport development in Latin America as well as in project finance. The location of this airport, which replaced the old airport that had become absorbed within the City of Quito surrounded by active volcanoes, added a number of unique challenges. As well as handling over 5 million passengers annually, the airport also exports some 20 million roses per day during peak times to destinations around the world. This paper summarises the project scope and benefits, key responsibilities, technical challenges and collaborative working that enabled the US$700 million airport development to meet contractual deadlines. Set up as a government-to-government Canadian–Ecuadorian prime contract, drawing in investors from Canada, USA and Brazil, with international financial institutions from the USA and Canada, the airport was built to international standards with suppliers from across the Americas and Europe, within the exacting obligations of the International Financial Organisation's Equator principles. The paper also examines the total concession structure including impact of a political event and the use of multiple sub-concessions needed for a fully operational airport. The authors' involvement throughout the planning, design and development of the new airport brings together important reference material for the particular benefit of those involved in transport concession projects.
IMPACTOS AOS ATRIBUTOS FÍSICOS DO SOLO EM TRILHAS OCASIONADOS PELO ECOTURISMO EM UBATUBA-SP
Authors: Saraiva Adriana Cristina Rosa
Published: April 2015

Em reservas florestais, a utilização de trilhas pelo trânsito de pessoas pode provocar destruição da camada de detritos vegetais sobre a superfície do solo, alterando seu estado estrutural e, dessa forma, causar a compactação do solo. O objetivo deste trabalho foi analisar os níveis de compactação em diferentes posições da Trilha dos Escravos, especificamente, centro e bordas, comparando-os com pontos existentes em condições ideais no interior da mata na Agência Paulista de Tecnologia de Agronegócios – APTA, em Ubatuba-SP. Foram amostrados 10 pontos, num percurso de 500 metros da trilha nas posições: centro, borda direita, borda esquerda e interior da mata. Em cada ponto amostral, foram coletadas amostras de solo para avaliação das propriedades físicas da umidade gravimétrica, densidade do solo, porosidade total e resistência à penetração. O estudo demonstrou que existe uma diferença significativa entre as posições locadas, os níveis de compactação do centro da trilha, ocasionados pelo pisoteio, são superiores aos dos pontos locados nas bordas e no interior da mata. Os resultados também demonstram o efeito nocivo da ação do pisoteio no aumento da resistência à penetração do solo devido à utilização da trilha pela visitação pública, sendo necessárias, como medidas para a conservação da Trilha dos Escravos, um bom planejamento e educação ambiental aos visitantes.
Palavra do Reitor
Authors: Gargione Filho Baptista
Published: April 2015

Palavra do Reitor
ANÁLISE MICROBIOLÓGICA DE MÃOS DE MANIPULADORES DE ALIMENTOS DO MUNICÍPIO DE SANTO ANDRÉ
Authors: Abreu Edeli Simioni de , Medeiros Flavia da Silva , Santos Deborah Adolfo
Published: April 2015

Os coliformes termotolerantes são definidos como “capazes de fermentar a lactose em meio EC, com produção de gás, no meio de 48 horas, a 45,5 °C”. O presente estudo teve por objetivo verificar a presença ou ausência de coliformes termotolerantes em amostras das mãos de manipuladores de alimentos de vias públicas do município de Santo André. A população de estudo foi composta por 12 manipuladores de cachorro-quente. Os métodos utilizados foram: um questionário observacional e um aplicado ao manipulador, além de coleta de amostras das mãos dos manipuladores, submetidas a meios de cultura. Todas as amostras inoculadas no meio de cultura nutriente apresentaram contaminação. Dos 108 tubos de Durhan com caldo VBB inoculados 100 (92,59%) apresentaram turvação do meio e 50 (46,30%) apresentaram formação de gás no interior do tubo de Durhan caracterizando a presença de coliformes totais. Foram inoculados 36 caldos EC, os quais 91,66% e 50% das amostras coletadas das unhas, 83,33% e 58,33% dos dedos e 75% e 66,67% das palmas das mãos apresentaram turvação e formação de gás respectivamente evidenciando a presença de coliformes termotolerantes. Vinte e quatro amostras foram utilizadas para confirmação da presença de E. coli, quinze (62,5 %), apresentaram colônias verde-brilhantes em meio EMB. Concluiu-se que o principal motivo pelo qual, várias amostras se apresentaram contaminadas por coliformes foi a higiene das mãos insuficiente, já que 100% dos manipuladores não lavavam as mãos durante o trabalho mostrando a necessidade de atitudes dos órgãos competentes para eliminar ou minimizar os riscos de contaminação.
REFLEXÕES E ORIENTAÇÕES SOBRE A PRODUÇÃO DE TEXTOS CIENTÍFICOS
Authors: Soares Maria do Carmo Silva
Published: April 2015

RESUMO: Tendo em vista as dificuldades apresentadas pela maioria dos pesquisadores iniciantes quanto à redação de textos científicos, este artigo tem como objetivo apresentar algumas reflexões sobre o tema e um resumo das principais competências necessárias para o planejamento e a redação desses textos. Neste sentido, após a apresentação de algumas conceituações teóricas e reflexões sobre o assunto, este artigo aborda algumas das dificuldades da área de produção de textos científicos, bem como apresenta orientações para facilitar essa tarefa, de acordo com as exigências formais da comunidade científica.