bluuebunny/crossref_metadata_2025 huggingface dataset:
EXPERIMENTAL DETERMINATION OF ACOUSTIC BEHAVIOR OF BUILDING MATERIALS BY MEANS OF ACCELEROMETERIC MEASUREMENTS
Authors: Fiala Lukáš , Konrád Petr , Černý Robert
Published: June 2020

In Central Europe, brick blocks with incorporated system of voids ensuring good thermal properties are widely used in the building industry. In the present, increasingly higher acoustic load gains on importance especially in the surroundings of places with high traffic load, places close to the airports or in urban areas. This fact should be taken into consideration in the design of constructions in order to ensure their good acoustic performance. The very first step of such design lies in the experimental determination of acoustic properties of the reference construction elements which are, if necessary, subsequently optimized by adjustment of the voids volume and geometry or filling of the voids by various bulk fillers ensuring a higher level of scattering of the propagating acoustic signal. In this paper, steel prism and brick block were subjected to measurements by accelerometers in the frequency range 1 – 10 kHz in order to compare acoustic behavior of materials with a significantly different structure. Finally, frequency-dependent displacements in accelerometers position,
AN ADAPTIVE RBF METHOD FOR DESIGN OPTIMIZATION OF BUILDING STRUCTURES
Authors: Wang Qian , Schmotzer Lucas , Kim Yongwook
Published: June 2020

Design of building structures has long been based on a trial-and-error iterative approach. Structural optimization provides practicing engineers an effective and efficient approach to replace the traditional design method. A numerical optimization algorithm, such as a gradient-based method or genetic algorithm (GA), can be applied, in conjunction with a finite element (FE) analysis program. The FE program is used to compute the structural responses, such as forces and displacements, which represent the design constraint functions. In this method, reading and writing the input/output files of the FE program and interface programming are required. Another method to perform structural optimization is to create an approximate constraint function, which involves implicit structural responses. This is referred to as a surrogate or metamodeling method. The structural responses can be expressed as approximate functions, based on a number of preselected sample points. In this study, an adaptive metamodeling method was studied and applied to a building structure. The FE analyses were first performed at the sample points, and metamodels were constructed. A gradient-based optimization algorithm was applied. Additional samples were generated and additional FE analyses were conducted so that the model accuracy could be improved, close to the optimal design points. This adaptive scheme was continued, until the objective function values converged. The method worked well and optimal designs were found within a few iterations.
BI-AXIAL STRESS-STRAIN RELATIONS FOR CONCRETE WITH ISOTROPIC AND ANISOTROPIC DAMAGE
Authors: Yazdani Siamak , Lomiento Giuseppe , Trad Yagoub
Published: June 2020

For the load paths with small or no confining pressure, the nucleation, growth, and coalescence of cracks and micro-cracks are the main sources of non-linearity in the observed behavior of concrete. The formations of cracks and micro-cracks destroy material bonds and render the material more compliant. These are typically irreversible internal changes and lead to strong directionality in concrete response. To model such nonlinear material behavior, a constitutive law for concrete utilizing damage mechanics is presented for small and isothermal deformations. The general theory is cast within the framework of the internal variable theory of thermodynamics where the dissipation inequality is used. A damage criterion is subsequently obtained using a damage function and the loading-unloading statement is provided. The decomposition of the compliance tensor into damaged and undamaged states is outlined and the flow rules for the inelastic strains are provided. Specific damage response tensors for isotropic and anisotropic modeling is proposed along with numerical simulations that are plotted for illustrating differences between isotropic and anisotropic formulations.
WIND LOADS ON ROOFING SYSTEM AND PHOTOVOLTAIC SYSTEM INSTALLED PARALLEL TO FLAT ROOF
Authors: Yambe Tetsuo , Uematsu Yasushi , Sato Kosuke
Published: June 2020

Mechanically-attached waterproofing system has become popular in Japan. Being vulnerable to wind actions, especially to suctions, this roofing system is often damaged by strong winds. Similarly, photovoltaic (PV) systems installed on flat roofs are often damaged by strong winds, because the PV panels are subjected to large wind forces in an adverse wind. In order to reduce such damage to both systems, the authors propose to install the PV panels parallel to the flat roof with gaps between them, which may reduce the net wind forces on the PV panels due to the effect of pressure equalization. In addition, the wind pressures acting on the waterproofing system will decrease significantly. The present paper investigates the validity of the above-mentioned idea. The wind pressures underneath the PV panels, called ‘layer pressures’, are evaluated by a numerical simulation using the unsteady Bernoulli equation together with the time history of external pressures measured at many locations on the rooftop of a flat-roofed building model in a turbulent boundary layer. The results clearly indicate a significant reduction of wind forces acting on the PV panels as well as on the waterproofing system. The use of PV panels for reducing the wind pressures on waterproofing system is quite effective to the corner region of the roof, where very large suctions are induced in a diagonal wind.
Externalidades de las emisiones del transporte público en Tepic, México: cambio climático y sustentabilidad
Authors: Serafín González Sylvia Lorena
Published: June 2020

Contexto: Los procesos antrópicos relacionados con la movilidad urbana han colocado en el tema del transporte público en la agenda de la mayoría de países. Efectivamente, comparado con el vehículo privado, este representa la forma más económica y sustentable de ejercer la movilidad cotidiana. Sin embargo, quienes utilizan el proceso de combustión interna, a través de derivados del petróleo, emiten gases de efecto invernadero, y por tanto, esta forma de movilidad motorizada se ha vuelto el mayor contribuyente al cambio climático global. Bajo esta premisa, el objetivo de este artículo consiste en analizar las externalidades de las emisiones de gases de efecto invernadero en el sector transporte público de autobuses en la ciudad de Tepic, México.

Método: La investigación utiliza datos proporcionados por la Secretaría del Medio Ambiente de Nayarit, a partir de los cuales se estimaron las emisiones de gases de efecto invernadero del transporte público utilizando la metodología de 1996 avalada por el Panel Intergubernamental del Cambio Climático de las Naciones Unidas. En este sentido, de acuerdo con esta metodología, que permite estimar el consumo de combustibles se obtuvo el recorrido anual por tipo de vehículo, así como su rendimiento vehicular.

Resultados: Las emisiones de gases de efecto invernado en la ciudad de Tepic, México, se aproximaron a las 192.000 toneladas emitidas por tan solo por transporte público de autobuses. Aunque el otorgamiento de concesiones se ha venido dando de manera desordenada y arbitraria por parte de los diferentes gobiernos, fue posible prospectar un escenario de emisión al 2020.

Conclusiones: El transporte público de autobuses en la ciudad de Tepic enfrenta un acelerado crecimiento, provocado por la expansión urbano-habitacional desordenada. Este sistema se ha convertido en uno de los principales emisores de gases de efecto invernadero, que lo colocan como tema central para la implementación de políticas públicas de transporte, adoptando iniciativas y mecanismos tendientes a reducir los niveles de emisiones, reducir externalidades y contribuir con la sustentabilidad y mitigación del cambio climático global.
Histologic Abnormalities of the Ascending Aorta: Effects on Aortic Remodeling after Intracardiac Repair of Tetralogy of Fallot
Authors: Chowdhury Ujjwal Kumar , Sankhyan Lakshmi Kumari , Avneesh Sheil , Ray Ruma , Kalaivani Mani , Hasija Suruchi , Chauhan Abhinavsingh
Published: June 2020

We evaluated aortic tissue specimens from patients undergoing tetralogy of Fallot repair, to determine whether histologic abnormalities affect postsurgical aortic remodeling and other patient-related variables.

Using light microscopy, we studied full-thickness aortic wall tissue operatively excised from 118 consecutive patients undergoing intracardiac repair of tetralogy of Fallot. We performed multiple linear regression analysis to identify independent predictors of change in aortic root dimensions, which we measured with echocardiography after repair and every 3 months thereafter.

Thirty histologically normal specimens were used as controls. Elastic fiber fragmentation was found in 74.6% of the abnormal specimens, mucoid extracellular matrix accumulation in 49.2%, smooth muscle cell nuclei loss in 39%, smooth muscle cell disorganization in 28.8%, and medial fibrosis in 52.5%. At a mean follow-up time of 83.55 ± 42.08 months, mean aortic sinotubular diameter decreased from 28.79 ± 9.15 to 27.16 ± 8.52 mm/m2 (r =–0.43; P <0.001). Aortic sinotubular diameter decreased by 0.6 mm/m2 among females (β =0.6, SE=0.31; P =0.05) and by 0.88 mm/m2 in patients who had elastic fiber fragmentation or loss (β =0.88, SE=0.38; P =0.02). In bivariate and multiple linear regression analysis, duration of follow-up emerged as an independent predictor of aortic remodeling.

The aortic histopathologic changes in our patients had an independent negative impact on the degree of aortic remodeling after surgery. We observed the most improved aortic sinotubular diameter in patients who had either histologically normal aortas or aortas with elastic fragmentation.
Anomalous Origin of All Coronary Arteries from Right Sinus of Valsalva
Authors: Bollempalli Harini , Divakaran Vijay G. , Kontak Andrew C. , Lee Patricia C.
Published: June 2020

Anomalous coronary arteries are rare and often incidental findings. Most variants are benign. We present the case of a 75-year-old man with exertional dyspnea in whom the left anterior descending coronary artery arose from the right sinus of Valsalva, and the left circumflex coronary artery originated from the distal right coronary artery and supplied the obtuse marginal branch. No arteries originated from the left sinus of Valsalva. The patient was prescribed optimal medical therapy for atherosclerotic stenosis in his ramus intermedius. His symptoms were stable 3 years later.
Sustainable Tourism Strategy for the City of Kupang's Lasiana Coastal Area
Authors: Titu E Rulina Yismaya , Dewi Santy Paulla
Published: June 2020

The integrated and sustainable coastal tourism development activities can contribute to an area both in increasing the income of the government and the local community. The Lasiana coastal area of Kupang City has both natural and cultural potential, location, but it has not been implemented optimally. This study aims to determine the development strategy of the Lasiana coastal area based on the opinion of tourists and local communities in supporting development. This research is quantitative descriptive. The approach in this study is a quantitative approach to describe respondents' responses to attractions based on the questionnaire given. The results showed that the perception of local people and tourists is very influential in determining the area development strategy. The strategies used include the provision of facilities and infrastructure, the provision of a master plan for regional tourism development, traffic management arrangements, human resource development, the development of attractions as well as for cooperation among parties in terms of promotion and maintaining the sustainability of tourism and the environment.
Patterns in Kindergarten: Teachers' Knowledge of Content and Students and Associated Self-Efficacy Beliefs
Authors: Schreiber Iris
Published: June 2020

The present study engages in sixty kindergarten teachers' knowledge and self-efficacy related to patterns. Two aspects are examined: Teachers' pedagogical knowledge of content and students (specifically, what is easy or difficult for the children and what their typical errors are) as well as teachers' self-efficacy in their knowledge. These aspects are explored about two types of patterns - a repeating pattern and a growing pattern. The results pertaining to the repeating pattern show that teachers have knowledge of children's typical errors. However, they have partial knowledge of what is easy or difficult for the children: they tend to underestimate children's performance. Regarding the growing pattern, teachers have partial knowledge of both children's typical errors and of what is easy or difficult for them: they tend to overestimate children's performance. The results may have implications for teachers' education and guidance, especially novice teachers.
The science of agricultural law in Poland. Reflections against the background of Western European science
Authors: Budzinowski Roman
Published: June 2020

The fifteenth anniversary of the inclusion of Polish agriculture in the CAP mechanisms prompts one to make summaries and comparisons and formulate evaluations of the development of the science of agricultural law in the European context. The deliberations presented in the article are an attempt to formulate a few valid reflections, focusing on the comparison of the EU agricultural acquis, the general (theoretical) agricultural (national) law issues, traditional agricultural law issues, agri-food and agri-environmental law and rural development. As it is demonstrated in the article, the distance between the Polish science of agricultural law and Western European science has significantly narrowed. The issues undertaken by Polish agricultural lawyers fall within the scope of interest of their Western European counterparts. It may therefore be said that Polish agricultural lawyers are increasingly frequently becoming partners in research conducted by foreign scholars, and the use of their research and organisational potential may also be useful on an international forum.
In vitro food production from animal cell cultures as a meat alternative (selected legal aspects)
Authors: Leśkiewicz Katarzyna
Published: June 2020

From a legal point of view, there may be doubts as to the legal qualification of food obtained in vitro from animal cells. An opinion is expressed in the article that meat from animal cells obtained using the in vitro method does not fall within the classical legal concepts of meat or agricultural production. However, meat products from cells produced by the in vitro method may satisfy the criteria established for novel food. If this is considered to be the correct way of qualification, then they should be subject to the EU market authorisation procedure regulated in Regulation 2015/2283, and a subsequent assessment of their safety. From a legal, economic and social point of view, it is reasonable to produce food using atypical methods if these methods are capable of ensuring food safety.
Metody badania prawa rolnego według koncepcji Profesora Andrzeja Stelmachowskiego
Authors: Czechowski Paweł
Published: June 2020

The deliberations are devoted to the methods of legal research that Professor Andrzej Stelmachowski conducted in the field of agricultural law. This outstanding civil lawyer and co-creator of agricultural law as a separate branch within the system of law used methods that shaped the philosophical schools of law research methodology, that is, the positivist, natural law and historical law school. Using the methodology of these schools, Professor Stelmachowski created an interesting conglomerate of methods of studying law through the analysis of the purpose of a legal norm, the empirical study of law in action and the historical and legal analysis of the evolution of legal institutions. The multithreaded method of legal research adopted by Professor Stelmachowski created a specific methodology of agricultural law research, which constitutes a significant legacy of the doctrine of agricultural law in Poland.
The role of the agricultural sector in the legal system of national reductions of air pollution in the European Union under Directive 2016/2284 NEC
Authors: Goździewicz-Biechońska Justyna
Published: June 2020

The aim of the article is to define the role of the agricultural sector in the legal systems of national emissions ceilings in the European Union, and in particular the requirements of the amended legal basis in this respect – Directive No 2016/2284 of 14 December 2016 on the reduction of national emissions of certain atmospheric pollutants, amending Directive 2003/35/EC and repealing Directive 2001/81/EC. This law, in addition to the Nitrates Directive, is currently one of the most important regulations of EU law on protection against environmental pollution from agricultural sources. Among the pollutants covered by the reduction obligation under Directive 2016/2284 NEC, ammonia is the most critical pollutant of agricultural origin, hence the crucial importance for agriculture of the measures aimed at reducing emissions of this substance. These measures are mainly of an optional nature and it is up to the Member States to determine how to achieve the national reduction target. It is therefore necessary to design the right mix of measures and match them with the different types of agricultural activities when developing relevant national strategies. It is also necessary to combine them with other regulations, in particular on industrial emissions and water protection, and to address the issues of nitrogen circle in a systemic manner, not only at farm level but also throughout the entire food chain.
Proposed method for highly selective resonant optical manipulation using counter-propagating light waves
Authors: Wada Takudo , Fujiwara Hideki , Sasaki Keiji , Ishihara Hajime
Published: June 2020

Optical manipulation using electronic resonance can realize the selective manipulation of nano objects exhibiting quantum mechanical properties by confining electronic systems based on the characteristics of individual objects. This study theoretically proposes a method to actualize selective manipulation based on the resonant optical response. In this method, counter-propagating light waves are used to extract the pure contribution of the resonant optical response in the exerted force by regulating the balance between the two light waves. Furthermore, the selection of nanoparticles with particular resonance levels at room temperature and quantum dots with a particular size in the cryogenic condition is numerically demonstrated. An especially interesting aspect of this method is that it enables the examination of the absorption spectrum of a single nanoparticle by mapping the absorption efficiency to its mechanical motion. The results reveal an unconventional link between optical force technology and nanomaterials science.
Ultrasensitive and fast photoresponse in graphene/silicon-on-insulator hybrid structure by manipulating the photogating effect
Authors: Jiang Hao , Nie Changbin , Fu Jintao , Tang Linlong , Shen Jun , Sun Feiying , Sun Jiuxun , zhu Meng , Feng Shuanglong , Liu Yang , Shi Haofei , Wei Xingzhan
Published: June 2020

The hybrid structures of graphene with semiconductor materials based on photogating effect have attracted extensive interest in recent years due to the ultrahigh responsivity. However, the responsivity (or gain) was increased at the expense of response time. In this paper, we devise a mechanism which can obtain an enhanced responsivity and fast response time simultaneously by manipulating the photogating effect (MPE). This concept is demonstrated by using a graphene/silicon-on-insulator (GSOI) hybrid structure. An ultrahigh responsivity of more than 107 A/W and a fast response time of 90 µs were obtained. The specific detectivity D* was measured to be 1.46 ⨯ 1013 Jones at a wavelength of 532 nm. The Silvaco TCAD modeling was carried out to explain the manipulation effect, which was further verified by the GSOI devices with different doping levels of graphene in the experiment. The proposed mechanism provides excellent guidance for modulating carrier distribution and transport, representing a new route to improve the performance of graphene/semiconductor hybrid photodetectors.
Fish Canning Industry and The Rhythm of Social Life in the Northeastern Adriatic
Authors: Petrović Tanja
Published: June 2020

The article discusses the social world formed around canneries in small coastal and insular towns in the northeastern Adriatic. Although associated with hard, unpleasant labor and demanding work conditions, the fish canning industry, particularly in the period of late socialism, offered a framework in which a meaningful social life was organized and lived. In this way, the local impact of canneries reached much beyond providing financial means to its employees. To understand the social meaning of fish canning in the Yugoslav Adriatic, the article focuses on the relationship between the now largely vanished local fish canning industry and tourism that is increasingly becoming the dominant (and the only) source of income for local communities. Lefebvre’s concept of rhythmanalysis proves to be a productive lens to view the complex and often ambiguous relationship between the two industries, and to narrate the history of fish canning through the senses – what was seen, heard, smelled, felt. These intense, embodied, sensorial memories caution us that the dominant claims and narratives which interpret the replacement of industry with tourism (and other tertiary sector activities) as a necessary, inevitable and desirable developmental step should not be taken for granted.
From Iron to the Industrial Cloud
Authors: Santos João Pedro
Published: June 2020

In the 1960s, Portugal lived through a period of rapid industrialization in what became known as the golden cycle of Portuguese industry. This late industrialization makes Portugal one of the countries ruled by a peripheral Fordism, which is particularly relevant in the region of Setúbal, since several heavy industry companies settled there, among them Setenave and Lisnave. These shipyards are described by workers as being “a city within the city” mostly given their dimension and labour contingent. However, this industrial “city” was more than a place of economic production; it was also a place for sociability. Informed by semi-structured in-depth interviews with former shipyard workers, and focused on the meaning they attribute to the changes experienced between the 1970s and the deindustrialization period of the 1980s, this article analyses the transition from a working culture based on solidarity to a culture dominated by competition and individualism.
Faire le point sur l’urbanisme tactique : entre innovations et dérives dans la fabrique de la ville
Authors: Lefebvre Sylvain , Diaz Jérémy , Adjizian Jean-Marc
Published: June 2020

L’article s’intéresse au phénomène très répandu ces dernières années de « l’urbanisme tactique », une tendance qui recoupe plusieurs réalités et nouveaux types d’aménagement et de planification territoriale. Ces nouvelles modalités de fabrique de la ville peuvent représenter un amalgame de pratiques très diversifiées de réappropriation de l’espace urbain, privé ou public, se traduisant par des transformations physico-spatiales ou événementielles, généralement spontanées, citoyennes et politiquement engagées (urbanisme temporaire, éphémère, populaire, insurgé, transitoire, etc.). Elles prennent d’assaut les interstices de l’espace urbain, sont parfois illégales (l’idée de guérilla urbaine, de space hacking, etc.), puis sont récupérées par les instances (administrations locales, promoteurs, investisseurs) comme prévalorisation au marché foncier et aux espaces environnants. Montréal n’a pas échappé à ce phénomène, et la multiplication des projets et des initiatives est exponentielle depuis quelques années.
L' atelier des étudiants. L’innovation sociale en milieu autochtone : le cas de l’Institut Tshakapesh, vecteur de territorialités plurielles
Authors: Dufour David
Published: June 2020

L’Institut Tshakapesh à Sept-Îles est un organisme régional innu qui valorise la langue, la culture et la réussite scolaire dans les communautés membres depuis plus de 40 ans. Il est surtout connu chez les Innus pour la production d’outils pédagogiques et linguistiques utilisés dans leurs écoles. L’Institut Tshakapesh est aussi présent ailleurs au Québec à travers le programme Sous le shaputuan, qui fait rayonner la culture innue dans les institutions scolaires allochtones et autochtones depuis 25 ans. Conséquemment, les Innus mettent de l’avant des territorialités plurielles, lesquelles sont explorées dans cet article.
Vincent van Schendel. Directeur général de l’organisme Territoires innovants en économie sociale et solidaire (TIESS)
Authors: Doyon Mélanie , Klein Juan-Luis
Published: June 2020

Détenteur d’une maîtrise en économie de l’UQAM et d’un doctorat en relations industrielles de l’Université Laval, Vincent van Schendel oeuvre depuis plus de 25 ans en recherche partenariale. Il est président du Réseau québécois en innovation sociale (RQIS). Toutefois, c’est son rôle de directeur général de l’organisme Territoires innovants en économie sociale et solidaire (TIESS) qui retient surtout notre attention dans le cadre de cet entretien.
Water Quality of the Trstionica River (Bosnia and Herzegovina)
Authors: Delibašić Šuhreta , Huremović Jasna , Žero Sabina , Gojak-Salimović Sabina
Published: June 2020

The present study was conducted to investigate the water quality of the Trstionica River, Bosnia and Herzegovina. The physicochemical properties (temperature, pH, conductivity, total solids after evaporation at 105 °C), content of metals (calcium (Ca), cadmium (Cd), chromium (Cr), copper (Cu), iron (Fe), magnesium (Mg), manganese (Mn), sodium (Na), nickel (Ni), lead (Pb) and zinc (Zn)), and anions (chloride (Cl–), and phosphate (PO43–)) were determined in water samples collected at seven locations during two sampling periods: unstable weather conditions (precipitation), and stable weather conditions (without precipitation). There was a significant difference in the content of individual parameters in the river water depending on the sampling time. For determination of metals concentrations, which were below the limit of detection, a preconcentration method using an ion-exchange resin was applied. The metals concentrations during the rainy day were in the order Ca > Mg > Na > Fe > Cu > Zn > Pb > Mn with mean values of 343, 6.03, 1.94, 0.18, 0.20, 0.03, 0.02, 0.01 mg dm–3, respectively, and during stable weather conditions: Ca > Mg > Na > Cu > Fe > Mn > Zn with mean values of 288, 7.62, 2.38, 0.11, 0.10, 0.01, 0.01 mg dm–3, respectively. Cd, Cr, and Ni concentrations were below limit of detection in both cases. Obtained values were compared with World Health Organization (WHO) regulations. The results showed that the Trstionica River in the investigated part of the stream meets most of the parameters required by the regulations. The correlation between analysed parameters was assessed, as well. Based on the calculated water quality index values, the water of Trstionica River falls into the category of excellent water.
Management changes for patients with endocrine-related cancers in the COVID-19 pandemic
Authors: Raghavan Derek , Tan Antoinette R , Story E Shannon , Burgess Earle F , Musselwhite Laura , Kim Edward S , Clark Peter E
Published: June 2020

Substantial management changes in endocrine-related malignancies have been required as a response to the COVID-19 pandemic, including a draconian reduction in the screening of asymptomatic subjects, delay in planned surgery and radiotherapy for primary tumors deemed to be indolent, and dose reductions and/or delays in initiation of some systemic therapies. An added key factor has been a patient-initiated delay in the presentation because of the fear of viral infection. Patterns of clinical consultation have changed, including a greater level of virtual visits, physical spacing, masking, staffing changes to ensure a COVID-free population and significant changes in patterns of family involvement. While this has occurred to improve safety from COVID-19 infection, the implications for cancer outcomes have not yet been defined. Based on prior epidemics and financial recessions, it is likely that delayed presentation and treatment of high-grade malignancy will be associated with worse cancer outcomes. Cancer patients are also at increased risk from COVID-19 infection compared to the general population. Pandemic management strategies for patients with tumors of breast, prostate, thyroid, parathyroid and adrenal gland are reviewed.
La ligereza como nueva forma de vida: entrevista con Gilles Lipovetsky para un análisis del presente
Authors: Salazar Celis Edward Fernando
Published: June 2020

En esta entrevista el sociólogo francés Gilles Lipovetsky, mundialmente reconocido por sus trabajos sobre la moda, el consumo y las sociedades hipermodernas, analiza algunos de los aspectos transversales de su obra, especialmente sobre la última de sus contribuciones analíticas: la sociedad de la ligereza. Introduzco esta entrevista con una lectura crítica a las teorías de Lipovetsky para contextualizar y problematizar sus postulados, con miras a recoger las contribuciones del autor que permitan un análisis contextualizado del presente.
La violencia policial como “mensaje”: un abordaje desde la experiencia de los jóvenes de Latinoamérica
Authors: Lerchundi Mariana Jésica
Published: June 2020

Este artículo se ubica en la línea de investigación que busca desentrañar diferentes dimensiones de la violencia policial, entendidas como un efecto de las políticas de seguridad. Aquí se comprende la violencia policial desplegada sobre los jóvenes latinoamericanos como un “mensaje”, que se leerá con base en los relatos de los jóvenes víctimas de esas violencias, en dos ciudades latinoamericanas: Río Cuarto (Argentina) y Barranquilla (Colombia). El trabajo se divide en tres apartados, aparte de la introducción y las conclusiones. En el enfoque teórico se describen las nociones de violencia policial, jóvenes y juvenicidio. En el abordaje metodológico se desliza una síntesis de las decisiones tomadas en el marco del camino investigativo. Posteriormente, se presentan los resultados, primero, a través de una descripción del contexto de las ciudades elegidas, y luego mediante los relatos de los jóvenes. Por último, en las conclusiones se justifica la necesidad de revisar esas prácticas policiales, junto al diseño y la implementación de las políticas de seguridad.
Ultraconserved Non-coding DNA Within Diptera and Hymenoptera
Authors: Brody Thomas , Yavatkar Amarendra , Kuzin Alexander , Odenwald Ward F
Published: June 2020

This study has taken advantage of the availability of the assembled genomic sequence of flies, mosquitos, ants and bees to explore the presence of ultraconserved sequence elements in these phylogenetic groups. We compared non-coding sequences found within and flanking Drosophila developmental genes to homologous sequences in Ceratitis capitata and Musca domestica. Many of the conserved sequence blocks (CSBs) that constitute Drosophila cis-regulatory DNA, recognized by EvoPrinter alignment protocols, are also conserved in Ceratitis and Musca. Also conserved is the position but not necessarily the orientation of many of these ultraconserved CSBs (uCSBs) with respect to flanking genes. Using the mosquito EvoPrint algorithm, we have also identified uCSBs shared among distantly related mosquito species. Side by side comparison of bee and ant EvoPrints of selected developmental genes identify uCSBs shared between these two Hymenoptera, as well as less conserved CSBs in either one or the other taxon but not in both. Analysis of uCSBs in these dipterans and Hymenoptera will lead to a greater understanding of their evolutionary origin and function of their conserved non-coding sequences and aid in discovery of core elements of enhancers.

This study applies the phylogenetic footprinting program EvoPrinter to detection of ultraconserved non-coding sequence elements in Diptera, including flies and mosquitos, and Hymenoptera, including ants and bees. EvoPrinter outputs an interspecies comparison as a single sequence in terms of the input reference sequence. Ultraconserved sequences flanking known developmental genes were detected in Ceratitis and Musca when compared with Drosophila species, in Aedes and Culex when compared with Anopheles, and between ants and bees. Our methods are useful in detecting and understanding the core evolutionarily hardened sequences required for gene regulation.
Assessments of Anthropometric, Physiological and Fitness Indicators According to Sex and Age in Participants of a Swimming Program
Authors: Rodríguez-Montero Alejandro , Ugalde Ramírez Jose Alexis , Rojas-Valverde Daniel
Published: June 2020

This study aimed to assess anthropometric, physiological, and fitness variables related to health in 158 participants of a swimming program (89 men and 69 women), distributed in three age groups (18-29 years, 30-39 years, 40-48 years). The following protocols were used: 1) bioimpedance analysis to determine the body weight (BW), body mass index (BMI), and body fat percentage (BFP); 2) a measuring tape to measure waist circumference (WC); 3) an automatic sphygmomanometer to obtain systolic (SBP) and diastolic (DBP) blood pressure; 4) a Sit and Reach test was used to evaluate flexibility and the push-up test to evaluate muscular endurance. The results showed that BFP and (BMI) were the variables in which the highest number of people presented unhealthy values, according to international parameters. Significant differences (p<0.05) were found in SBP, DBP, WC, BFP, BMI, and muscle endurance according to sex and age. Significant correlations were found between physiological responses, physical fitness, and body composition. In conclusion, age and sex influence the results of the variables. Results were found that represent metabolic and cardiorespiratory risk factors.
El efecto agudo de diferentes tipos de estiramiento sobre la altura de salto de gimnastas: revisión sistemática
Authors: Ulloa Sánchez Paul
Published: June 2020

Objetivo: El principal objetivo del presente estudio fue analizar el efecto de diferentes tipos de estiramiento sobre la altura de salto de gimnastas. Metodología: Se consultaron las siguientes bases de datos: EBSCOhost (SPORTDiscus, MEDLINE, Academic Search Complete, E-Journals, Fuente Académica Premier, International Bibliography of Theatre & Dance with Full Text y PsycARTICLES) y Pubmed. Se utilizó la siguiente frase bolena: (stretch OR static stretch OR dynamic stretch OR ballistic stretch OR proprioceptive neuromuscular facilitation) AND (jumping OR vertical jump OR countermovement jump OR explosive strength OR performance) AND (gymnasts OR gymnastics). Se establecieron los siguientes criterios de elegibilidad: Que posea un diseño experimental, cuasiexperimental o preexperimental. Que la muestra sea de gimnastas. Explicación de metodología clara. Buena descripción del método de estiramiento aplicado. Resultados: Se incluyó un total de 10 estudios individuales, la muestra total entre esa cantidad de estudios fue de 226 sujetos y, la cantidad de intervenciones fue de 16. El 75 % de las intervenciones tuvo un efecto no significativo (p>.05), mientras que el otro 25 % tuvo un efecto significativo (p<.05*) sobre la altura de salto. Ese porcentaje de efectos significativos corresponde a dos aumentos y dos disminuciones de la altura de salto. Conclusiones: La mayoría de las intervenciones indica que la altura de salto de gimnastas no se ve afectada por los diferentes tipos de estiramiento (sólo el 12.5 % de las intervenciones refutan esta afirmación), incluso, dos intervenciones mostraron aumentos de la capacidad de salto durante un tiempo determinado.
Elaboración de un modelo de evaluación estadístico, para reducir las tasas de accidentabilidad en la Mina Uchucchacua
Authors: Rodríguez Vigo Carlos Enrique
Published: June 2020

Esta investigación permitió evaluar los resultados de la gestión de riesgos en una operación minera. Se destaca la importancia de adoptar medidas preventivas para controlar las causas de la accidentabilidad. Con tal fin, se desarrolla una Metodología que permite identificar y dar la máxima atención a los riesgos críticos existentes, determinados a partir de evaluar y analizar la información que brindan los Informes de Investigación de Accidentes. Así, se reconocen las características del trabajo predominantes en la ocurrencia de los accidentes, para atenderlas sistemáticamente y evitar los daños que generan. Esta metodología utiliza el Principio de Pareto, para encontrar de manera práctica, aquellas pocas características del trabajo que aún influyen en la accidentabilidad, en las que debemos enfocar prioritariamente la gestión. También permite identificar el ‘público objetivo’ que es el más afectado por los daños ocurridos. Toda esta información adecuadamente manejada puede facilitar el actuar preventivamente para controlar los riesgos en el trabajo, buscando proteger al personal y evitar nuevos o eventos repetitivos que los afecten.
Efectos de la transformación de fases con respecto a la orientación y velocidad en el nanocable de cobre deformados por tracción
Authors: Vega Guillén Víctor Augusto , Rojas Tapia Justo Alcides
Published: June 2020

Los NCs tienen muchos comportamientos únicos que no se ven en los materiales a nivel volumen. El objetivo del estudio es conocer los efectos de la trasformación de fases con respecto a la orientación y velocidad en el nanocable de cobre deformados por tracción. Debido la necesidad de comprender mejor los mecanismos de deformación mediante simulaciones y el método de dinámica molecular con los potenciales del tipo EAM evaluamos la transformación de fases en la correlación directa entre la curva tensión-deformación, y el porcentaje de la abundancia de pares. En la región elástica en un rango de 60% a 80% de átomos se encuentran formando estructuras FCC, unos 10% a 20% la estructura HCp, la formación de la estructura BCC es mínima y el porcentaje de otras formaciones están en un rango de 20% a 40%, afectadas por la velocidad y orientación como resultado el mayor módulo de elasticidad es de 100 GPa y límite de fluencia de 9.0 GPa con una orientación de (111) este fenómeno único permite el diseño de nanosistemas.
Turing instability and spatially homogeneous Hopf bifurcation in a diffusive Brusselator system
Authors: Yan Xiang-Ping , Zhang Pan , Zhang Cun-Huz
Published: June 2020

The present paper deals with a reaction–diffusion Brusselator system subject to the homogeneous Neumann boundary condition. When the effect of spatial diffusion is neglected, the local asymptotic stability and the detailed Hopf bifurcation of the unique positive equilibrium of the associated ODE system are analyzed. In the stable domain of the ODE system, the effect of spatial diffusion is explored, and local asymptotic stability, Turing instability and existence of Hopf bifurcation of the constant positive equilibrium are demonstrated. In addition, the direction of spatially homogeneous Hopf bifurcation and the stability of the spatially homogeneous bifurcating periodic solutions are also investigated. Finally, numerical simulations are also provided to check the obtained theoretical results.
Some new fixed point results in rectangular metric spaces with an application to fractional-order functional differential equations
Authors: Budhia Lokesh , Aydi Hassen , Ansari Arslan Hojat , Gopal Dhananjay
Published: June 2020

In this paper, we establish some new fixed point theorems for generalized ϕ–ψ-contractive mappings satisfying an admissibility-type condition in a Hausdorff rectangular metric space with the help of C-functions. In this process, we rectify the proof of Theorem 3.2 due to Budhia et al. [New fixed point results in rectangular metric space and application to fractional calculus, Tbil. Math. J., 10(1):91–104, 2017]. Some examples are given to illustrate the theorems. Finally, we apply our result (Corollary 3.6) to establish the existence of a solution for an initial value problem of a fractional-order functional differential equation with infinite delay.
Persistence of nonautonomous logistic system with time-varying delays and impulsive perturbations
Authors: Yang Dan , Li Xiaodi , Liu Zhongmin , Cao Jinde
Published: June 2020

In this paper, we develop the impulsive control theory to nonautonomous logistic system with time-varying delays. Some sufficient conditions ensuring the persistence of nonautonomous logistic system with time-varying delays and impulsive perturbations are derived. It is shown that the persistence of the considered system is heavily dependent on the impulsive perturbations. The proposed method of this paper is completely new. Two examples and the simulations are given to illustrate the proposed method and results.
Cinema e consciência: desafios da formação docente
Authors: Borges Marcia Narcizo , Miranda Rafaela Reis Machado , Leal Raiza Caroline de Oliveira , Rodrigues Thiago Duarte
Published: June 2020

Esse trabalho apresenta um relato de experiência sobre a qualificação da formação inicial de alunos do curso de licenciatura em Química da UFF - Universidade Federal Fluminense por meio da linguagem cinematográfica. O ciclo de cines debates organizado por este grupo numa escola da rede pública estadual, na cidade de Niterói (RJ), demonstrou que a experiência estética e subjetiva do cinema gera um ambiente de ensino-aprendizagem mais democrático, onde estudantes do Ensino Superior e da Educação Básica tornam-se consumidores e críticos da linguagem audiovisual. Os resultados obtidos mostraram, sobretudo que foi possível formar professores de Química comprometidos em experimentar e pesquisar o potencial educativo que o cinema oferece, praticando uma pedagogia que visa muito mais do que o ensino de conteúdos disciplinares, mas a formação cidadã.
Range extension of the poorly known and Critically Endangered freshwater snail, Heleobia transitoria (Biese, 1947) (Gastropoda, Cochliopidae), in the Atacama Desert, northern Chile
Authors: Collado Gonzalo A. , Fuentealba Carmen Gloria
Published: June 2020

The range distribution of Heleobia transitoria (Biese, 1947) is confined only to its type locality, Quebrada Cachina, a ravine located on the Atacama Desert coast in the Antofagasta Region, northern Chile. The species is classified as “En Peligro Crítico” according to Ministry of the Environment of Chile, a category equivalent to Critically Endangered (CR) of the IUCN Red List of Threatened Species, in part for its restricted distribution. This paper reports the occurrence of H. transitoria in the Atacama Region, Chile, after the study of morphological characters using light and scanning electron microscopy. This new record highlights considering the limited distribution and current conservation status of the species.
New record of Juliomys ossitenuis Costa, Pavan, Leite & Fagundes, 2007 (Rodentia, Sigmodontinae) in Santa Catarina state, southern Brazil
Authors: Souza Maíra Michalak de , Kubiak Bruno Busnello , Maestri Renan , Kretschmer Rafael , Galiano Daniel
Published: June 2020

Juliomys ossitenuis Costa, Pavan, Leite and Fagundes, 2007 was previously known in Brazil from the Atlantic Forest of the Southeastern Region to the Dense Ombrophilous Forest and Araucaria Forest of the Southern Region. The new record from Chapecó, in Santa Catarina state, confirmed by morphological and cytogenetic analyses, extends its distribution about 300 km westwards. This is the westernmost record for the species, in a region characterized by the transition between deciduous and Araucaria forests.
PERANAN SEKTOR PERIKANAN TERHADAP PEREKONOMIAN KABUPATEN NATUNA
Authors: Anggraeni Meirina , Rustiadi Ernan , Yulianto Gatot
Published: June 2020

Kabupaten Natuna sebagai daerah pulau-pulau kecil memiliki sumber daya alam yang besar khususnya perikanan. Sektor perikanan diharapkan dapat menjadi motor penggerak bagi pengembangan wilayah Kabupaten Natuna. Salah satu alternatif menggerakkan dan memacu pembangunan wilayah adalah menentukan pusat pertumbuhan ekonomi dan meningkatkan keterkaitan antar sektor. Penelitian ini bertujuan untuk menganalisis tingkat perkembangan wilayah berdasarkan kelengkapan infrastruktur wilayah, menganalisis keterkaitan ke belakang dan ke depan (backward and forward linkages) sektor perikanan dan menganalisis seberapa besar peranan sektor perikanan terhadap perekonomian Kabupaten Natuna. Analisis data yang digunakan adalah Skalogram dan Input-Output (I-O). Hasil penelitian menunjukkan kecamatan yang berpotensi sebagai pusat pertumbuhan ekonomi adalah Kecamatan Bunguran Timur dan Pulau Tiga. Sektor industri pengolahan, penyediaan akomodasi dan makan minum, transportasi dan pergudangan, jasa keuangan dan asuransi, dan real estate dan jasa perusahaan termasuk ke dalam sektor unggulan karena memiliki daya penyebaran ke belakang dan daya kepekaan terhadap permintaan akhir sektor-sektor perekonomian. Sementara sektor perikanan belum menjadi sektor unggulan yang dapat menjadi penggerak secara langsung perekonomian di Kabupaten Natuna. Upaya untuk mendorong keterkaitan antar sektor perikanan dengan sektor perekonomian wilayah dengan pengembangan industri hilir yang memanfaatkan output kegiatan perikanan sebagai bahan baku produksinya baik secara langsung maupun tidak langsung dan difokuskan pada lokasi yang berpotensi sebagai pusat pertumbuhan Tittle: Role of Fisheries Sector to Economy of the Natuna RegencyNatuna Regency is a potential area with great amount of fisheries resources. Its fisheries resources are expected to encourage the development within the regency. The establisment of economic growth center and increased linkages among sectors were suggested to accelerate the regional development. This study aims to analyze the level of regional development based on the completeness of regional infrastructure, to analyze the backward and forward linkages of the fisheries sector and to measure the role of fisheries in economy of Natuna Regency. Scalogram and Input-Output were used for data analysis. The results suggested two districts as a center of economic growth, they are Bunguran Timur District and Pulau Tiga. Instead of fisheries sector,  the manufacturing, accommodation, food and beverage, transportation, warehousing, financial and insurance services, real estate and company services were the leading sectors due to their backward deployment and sensitivity to the final demands of the economic sectors. Efforts to encourage linkages between fisheries and other regional economic sector are necessary through the development of downstream industries. It includes the directly and indirectly use of fisheries outputs as raw material for production in the focus area of centers of growth
Diversity of the genus Sargassum (Fucales: Sargassaceae) in Tho Chu Archipelago, Kien Giang Province.
Authors: Tu Nguyen Van
Published: June 2020

Our study investigated 12 study sites in four main islands of Tho Chu archipelago in 2019. Six Sargassum species were recorded for the flora of Tho Chu Archipelago, viz.Sargassum aquifolium (Turner) C.Agardh, Sargassum feldmannii Pham-Hoang Ho, Sargassum ilicifolium (Turner) C.Agardh, Sargassum mcclurei Setchell, Sargassum oligocystum Montagne, Sargassum polycystum C.Agardh, among which  three species, namely Sargassum oligocystum Montagne, Sargassum feldmannii Pham-Hoang Ho and Sargassum mcclurei Setchell were newly recorded for Vietnam. There was a significant difference in species composition between Tho Chu, Hon Xanh, Hon Tu and Hon Cao islands; among them, Hon Xanh island differed from the other three islands by 28%, Hon Tu island and Tho Chu island were mostly similarity in flora composition with the similarity index of 85.7%. The morphology of some Sargassum species varied by ecological characteristics, especially for Sargassum aquifolium (Turner) C. Agardh and Sargassum oligocystum Montagne.