bluuebunny/crossref_metadata_2025 huggingface dataset:
Outcomes of the calcaneo-stop procedure for the treatment of juvenile flatfoot in young athletes
Authors: Pavone V. , Vescio A. , Di Silvestri C. A. , Andreacchio A. , Sessa G. , Testa G.
Published: September 2018

Purpose

Flexible flatfoot (FFF) is a widespread condition in juvenile patients. If symptomatic, FFF can require surgical treatment. The calcaneo-stop procedure has shown excellent clinical and radiographic outcomes and low rates of complications. The aim of the present study was to assess the sport practice of young athletes affected by FFF having undergone the calcaneo-stop procedure.

Methods

Between 2008 and 2016, 68 sport practitioners were bilaterally treated by the calcaneo-stop procedure, for a total of 136 FFF cases. Clinical evaluation, including the American Orthopedic Foot and Ankle Score (AOFAS), the Yoo et al score and The Foot & Ankle Disability Index (FADI) and FADI Sport scores were assessed. Radiographic evaluation was based on measurement of talar declination, Costa-Bertani's angle and calcaneal pitch.

Results

Mean follow-up was 57.6 months (sd 16.8). The AOFAS score mean increased from 79.3 (sd 5.7) to 97.3 (sd 4.5) three years after surgery. The Yoo score improved from 3.1 (sd 1.0) preoperatively to 11.7 (sd 0.6) three years after surgery. The FADI Sport subscale mean improved from 74.1 (sd 10.4) preoperatively to 95.9 (sd 4.9) three years after surgery. Costa-Bertani's angle decreased from 156.1° (sd 4.2°) to 135.8° (sd 7.3°) at three years postoperatively; mean talar declination angle decreased from 44.2° (sd 6.3°) to 30.6° (sd 3.2°) at three years postoperatively and mean calcaneal pitch increased from 12.6° (sd 2.3°) to 16.3° (sd 1.3°) at three years postoperatively.

Conclusion

Adolescent patients who underwent the calcaneo-stop procedure reported satisfactory outcomes in terms of clinical and radiological evaluations. Moreover, our results showed an improvement of sport activity levels, with patients recovering sports activity within three months of surgery and without limitation in the execution of preferred activities.

Level of Evidence

IV
Evaluation of Some Sugar Beet Genotypes Under Drought Stress Based on Selection Indices
Authors: Okasha Salah A. , Mubarak Mohamed H.
Published: September 2018

This study was conducted to determine drought tolerant indices of some sugar beet genotypes under water stress and non-stress conditions. Nine sugar beet (Beta Vulgaris L.) genotypes were tested in a Split-plot experiment based on a randomized complete block design in three replications under three levels of water stress 100%, 75% and 50% from plant requirements at the experimental farm Faculty of Agriculture, Suez Canal University, Ismailia, Egypt during 2015/ 2016 and 2016 / 2017 seasons. Twelve drought tolerance indices were used in this study, stress sensitivity index (SSI), stress tolerance (TOL), mean productivity (MP), geometric mean (GMP), harmonic mean (HM),yield stability index (YSI), yield index (YI), stress tolerance index (STI), sensitivity drought index (SDI), relative drought index (RDI), drought response index (DI) and stress susceptibility percentage index (SSPI). GMP, MP and STI were more informative towards classification of better or superior genotypes with respect to tolerant and sensitive groups. The results showed that the genotypes with high STI, GMP and MP values were suitable for cultivation under drought stress and non-stress environments. Both Yp and Ys of root yield in the control-50% analysis had significantly positive correlated (P value<0.05) with MP, GMP, YI, HM and DI, This indicates that these indices were more effective in identifying high yielding genotypes under drought stress as well as non-stress conditions.Principal components analysis showed that the first two components in the control-50% analysis, genotype Bts 1237 and Temar were identified as the most stable high yielding genotypes in both environments
NIRS Footprint of Bio-Fertilizers from Hay Litter-Bags
Authors: Masoero Giorgio , Masoero Giorgio , Delmastro Marco , Cugnetto Alberto , Giovannetti Giusto , Nuti Marco
Published: September 2018

The biofertilization of cropsusing microbial biota in the soil (MBS) is a modern practice that is used to sustain fertility. MBS agents can promote the yield and health of crops, by luxuriating in the shoot as well as in the root systems. Farmers devoted to systematic MBS fertilization are creating a “Symbiotic” (S) form of agriculture, which offers a greater advantage of resilience than Conventional (C) or organic farming. Since MBS is involved in organic matter degradation, hay-litter-bag probes can be used to reflect a global functionality of the active soil, in the short-medium term. It is here shown that the NIRS hay-litter-bag technique, intended not as mass decay but as a quality evolution of the hay probes, can be modelled as a valid footprint of S vs. C soils. A patented MBS was used in eight experiments in which litter-bags from an S treated thesis were compared with equivalent litter-bags from a non-inoculated C thesis. The chemical signature of the S vs. C in the litter-bag composition was a percentage decrease of sugars and fibres. A smart NIRS device was used to discriminate the origin of the S vs. C litter-bags and a sensitivity of 71% (P<0.0001) was obtained. External validations on 37 S farms showed that three NIRS models discriminated the true positive S spectra, with a sensitivity of 90% as single and 98% as compound probabilities The NIRS radiation of the hay-litter-bags confirmed the results of the S vs. C agriculture soil footprint. Moreover, the SCIO-NIR devices also made it possible to connect the S farms in a smart network.
Education for Sustainable Development: A Situational Diagnostic and a Case Study at Secondary Technical School level in Hermosillo, Mexico.
Authors: Esquer Javier , Manzo Francisco , Zavala Andrea G. , Alvarez Clara R. , Velazquez Luis E.
Published: September 2018

Education for sustainable development (ESD) has emerged during last years as a way to promote a better culture of respect, balance and justice for the environment and society. This document aims to describe relevant results of a study conducted in the city of Hermosillo, Mexico, about sustainability programs in secondary technical schools. The study was addressed in two ways: A survey was applied to ten (10) local institutions and a case study was conducted to one of them in order to identify behaviors and beliefs of its faculty members under sustainability approach. Two of the main outcomes are that ESD has not been as effective in the city as it was thought; and that the perceptions and values of the participant institution might be redirected towards a more environmental empathy.
Análise Ergonômica da atividade de Jardinagem e Paisagismo
Authors: Vergara Lizandra Garcia Lupi , De Lima Nunes Igor Mateus , Rodrigues Igor Nunes , Correia Luiz Carlos da Silva , Da Silva Vinicius
Published: September 2018

O objetivo deste trabalho é demonstrar as condições de trabalho da atividade de jardinagem e paisagismo de uma empresa localizada em Florianópolis-SC, um setor de serviços ainda pouco explorado em pesquisas nacionais. Para tanto, utilizou-se como ferramenta metodológica a Análise Ergonômica do Trabalho (AET), aplicada em dois trabalhadores da empresa de paisagismo e jardinagem analisada. Pode-se verificar que o ambiente de trabalho característico deste tipo de atividade, que se difere a cada serviço prestado, bem como os equipamentos utilizados, são fatores que podem contribuir e comprometer a saúde destes trabalhadores. Assim sendo, buscou-se não somente identificar e diagnosticar os problemas ergonômicos através da análise da tarefa e das atividades destes profissionais como também propor recomendações quem venham a prevenir possíveis riscos ocupacionais ou acidentes de trabalho com consequentes afastamentos da atividade laboral.
La Gestión del talento humano como herramienta competitiva para el desarrollo del capital intelectual
Authors: Moya Pardo Martha Lucía , Ochoa Rodríguez Julio Fernando
Published: September 2018

El presente artículo, busca  establecer cómo la Gestión del Talento Humano, puede llegar a constituirse en una herramienta estratégica que facilite a las organizaciones, la potencialización de una serie de competencias, habilidades y actitudes, propias de los trabajadores, las cuales, de llegar a ser intervenidas, se traducen en una serie de beneficios, tanto para la organización como para el mismo colaborador. Por tal razón, los autores desarrollan un recorrido sobre los diferentes modelos de gestión del conocimiento, haciendo especial énfasis en la cadena de valor del conocimiento y el desarrollo del capital intelectual y los de gestión del talento humano (gestión por competencias), con el fin de adaptar un modelo organizacional que permita incrementar la productividad y fomentar la innovación de productos o servicios.
Estimating the size of plants by using two parallel views
Authors: Videc Barbara , Rakun Jurij
Published: September 2018

This paper presents a method of estimating the size of plants by using two parallel views of the scene, taken by a common digital camera. The approach relays on the principle of similar triangles with the following constraints: the resolution of the camera is known; the object is always in parallel to the camera sensor and the intermediate distance between the two concessive images is available. The approach was first calibrated and tested using one artificial object in a controlled environment. After that real examples were taken from agriculture, where we measured the distance and the size of a vine plant, apple and pear tree. By comparing the calculated values to measured values, we concluded that the average absolute error in distance was 0.11 m or around 3.7 %, and the absolute error in high was 0.09 m or 4.6 %.
Geological Tourism Development In The Finnish-Russian Borderland: The Case Of The Cross-Border Geological Route “Mining Road”
Authors: Nenonen Jari K. , Stepanova Svetlana V.
Published: September 2018

The Finnish-Russian borderland has a unique geological potential for geological tourism development. Creating new tourist attractions based on geoheritage, design and development of the cross-border tourist routes open new opportunities for tourism development on both sides of the border. The article presents the crossborder geological tourist route “Mining Road” as a tool of activation of tourist activity in the Finnish-Russian borderland. This article explores the practical aspects of the project "Mining Road" development for tourism industry. It is proven the significance of cross-border route "Mining road" for preservation, popularization and reproduction of the natural, cultural and historical potential of the borderland.
Kaczawa Klippen Belt – geotouristic attraction in the Sudety Mountains, SW Poland
Authors: Golonka Jan , Barmuta Maria , Barmuta Jan
Published: September 2018

In the paper authors present some geological sites from Kaczawa Unit, Sudetes, Poland, and their interpretation in a geotectonic context. All described geosites are important for understanding the evolution of so called Kaczawa Accretionary Prism as well as whole Sudetes. Presented outcrops are easily accessible, well exposed and exhibits high education value. Special attention was given to the Wojcieszów Limestones and their relationship to the surrounding rocks
Progression of Retinal Pigment Epithelium Atrophy in Patients with Long-Term Anti-Vegf Treatment for Exudative Age-Related Macular Degeneration
Authors: Jekabsone Lita , Kursite Anete , Gertners Oskars , Laganovska Guna
Published: September 2018

Introduction.Age-related macular degeneration is the leading cause of visual impairment in developed world. The reason for using intravitreal injections of anti-vascular endothelial growth factor (VEGF) is to prevent choroidal neovascularization which is the main pathogenic mechanism for exudative age-related macular degeneration. Although injections may improve visual acuity, there are evidence showing association of anti-VEGF injections with progression of retinal pigment epithelium (RPE) atrophy. Aim of the Study.The purpose of this study was to investigate the intravitreal anti-vascular endothelial growth factor impact on retinal pigment epithelium atrophy development and progression. Material and methods.A single-centre retrospective study was conducted. Total 51 eyes of 39 patients with exudative age-related macular degeneration undergoing intravitreal anti-vascular endothelial growth factor therapy for 48 months. Heidelberg Spectralis Optical Coherence Tomography and fundus autofluorescence were used for evaluation of retinal pigment epithelium atrophy area and retinal thickness. Measurements were made manually. Best-corrected visual acuity (BCVA) measurements were taken from patient medical histories. For statistical analysis, IBM Statistical Package for the Social Sciences, version 23.0 was used. Results.The average age of patients was 81.6 ± 6.7 years. After first year of intravitreal anti-VEGF therapy, retinal pigment epithelium atrophy area enlarged from baseline (from 1.91 ± 2.3 mm2 to 2.74 ± 2.3mm2, p < 0.001). The mean number of intravitreal anti- VEGF injections received in 48 months was 15.47 ± 5.14. There was a statistically significant correlation between total number of intravitreal injections and RPE atrophy (R = 0.757, p < 0.001). After first year of anti-VEGF therapy best-corrected visual acuity (decimals) was statistically improved from baseline (0.32 ± 0.26 to 0.37 ± 0.24, p = 0.04). However, despite significant improvement at first year, the further treatment contributed BCVA reduction. Conclusions.Retinal pigment epithelium atrophy is a frequent finding in eyes with exudative age-related macular degeneration before and after anti-VEGF therapy. Our data show statistically significant association between total number of intravitreal anti-VEGF injections and retinal pigment epithelium atrophy area enlargement. Also there was statistically significant best-corrected visual acuity improvement after first year of anti-VEGF therapy.
Intersections in Design Thinking and Art Thinking: Towards Interdisciplinary Innovation
Authors: Jacobs Jessica
Published: September 2018

As the problem-solving methodology of design thinking has gained legitimacy in business and educational environments, this article suggests we also think about incorporating “art thinking” into approaches in design pedagogy. To study what skills and techniques can be useful in other disciplines, we can first review the stages of the creative process which are centered around preparation, incubation, ideation, illumination, and evaluation. Within those stages, we can tease out specific elements unique to the artistic process that can be particularly useful, including mindsets of emotional engagement, intuition, and tolerance of ambiguity as well as cognitive strategies such as the use of metacognition, resource banks, generators and constraints, prolonged research, problem-creation, conversation with the work, closure delay, and reflection and thematic coherence. Emphasizing these elements and strategies in design pedagogy can expand possibilities for creativity and innovation.
Traversing the liminal: what can Fontan adults’ transition experiences and perspectives teach us about optimizing healthcare?
Authors: du Plessis Karin , Peters Rebecca , Culnane Evelyn , d’Udekem Yves
Published: September 2018

Background

Successfully transitioning to adult care is important for congenital heart disease (CHD) patients, particularly those at the worst end of the spectrum with a Fontan circulation, as their ongoing health engagement affects their health outcomes. Yet, there is a lack of literature exploring patient perspectives about their transition experiences, and what helps or hinders successful transition to adult care.

Methods

Young adults with a Fontan circulation (n = 18) from the Australian and New Zealand Fontan Registry participated in in-depth phone interviews. Thematic analyses were used to analyze the qualitative interview data.

Results

We identified six key themes which stood out from patient experiences, including differences between pediatric and adult congenital cardiac care, the need for preparation through formal transition programs, and the important role of support systems.

Conclusion

To become active managers of their healthcare and remain engaged with the healthcare system, young people would benefit from coordinated efforts between pediatric and adult care to formally prepare them for transition to adult care. This should include involvement from their support network and ongoing education about their health condition. The study highlights the importance of studying patient perspectives through qualitative research to better inform health service provision in the CHD space.
Declining age at menarche in Indonesia: a systematic review and meta-analysis
Authors: Wahab Abdul , Wilopo Siswanto Agus , Hakimi Mohammad , Ismail Djauhar
Published: September 2018

Background

There has been much research on the average age at menarche onset. In higher income countries the lowering in average age at menarche is earlier than in middle-income countries and lower income countries. Indonesia as a middle-income country also has some research experience related to the average age at menarche for girls.

Objectives

This study aimed to review the lowering of the average age at menarche in Indonesia and to predict changes in average age at menarche.

Methods

This study provides a systematic review and meta-analysis using references from Google Scholar, PubMed and Popline databases on the trend of age at menarche in Indonesia and other data sources from local and national survey reports. Metaprop command in STATA was used to do the meta-analysis of proportion of early age at menarche and time series with auto-regressive integrated moving average (ARIMA) models were used in analyzing the trend and predicting the age at menarche.

Results

The results show that in Indonesia the timing of age at menarche onset has significantly lowered during the 40 years before 2010. There was meaningful decrease of age at menarche, which changed from 14.43 years [confident interval (CI) 95%: 14.42, 14.44] to 13.63 years (CI95%: 13.63, 13.64). Using the ARIMA model, mean age at menarche onset for the next year predicted that the coefficient regression would be −0.0245 (CI95%: −0.0275, −0.0215). The predicted average age at menarche shows a decrease of 0.0245 years (8–9 days) each year.

Conclusion

The findings indicate a significant lowering of age at menarche in Indonesian girls that has continued as a predictable trend through time until the present, paralleling recent socioeconomic changes. These predictions provide key indicators of a girl’s future healthy transition from childhood into young adulthood.
Study of Permissible Flow Rate and Mixing Efficiency of the Micromixer Devices
Authors: Karthikeyan K , Sujatha L
Published: September 2018

This paper deals with design, simulation, fabrication, analysis of mixing efficiency and thin film bonding stability of the micromixer devices with different flow rates used for lab on chip applications. The objective of the present study is to achieve complete mixing with low flow rate and less pressure drop in low cost polymer microfluidic devices. This paper emphasis the design, simulation and fabrication of straight channel micromixer, serpentine channel micromixer with and without quadrant shaped grooves to study the mixing behavior by the effect of structural dimensions of the microfluidic channel at different flow rates. The designed micromixers were tested with varying rates of flow such as 1, 10, 25, 50, 75 and 100 µL/min.
Coming out from their burrows: first photographic records of Priodontes maximus (Kerr, 1792) (Cingulata: Chlamyphoridae) in a forest remnant on the outskirts of Manaus, Amazonas, Brazil
Authors: Pratas-Santiago Luís Pedro , Sousa Gonçalves André Luis , Meirelles Fernanda , Spironello Wilson Roberto
Published: September 2018

Giant armadillo (Priodontes maximus) has a wide, and sometimes unknown, distribution across the South American continent. Giant armadillos are found in several types of well-preserved habitat. In the Amazon, the presence of P. maximus was fully confirmed through direct evidence only in a handful of occasions and it remains a poorly known species with considerable gaps and uncertainty concerning its distribution. This sensitive species is highly vulnerable to hunting. Data on P. maximus are usually obtained through indirect observations. Using camera-traps, we bring to sight the first direct observations of this species near Manaus (Brazil). Its presence points out the ecological relevance of the forests in this location and fills a gap where its distribution was still uncertain. More information on the movement patterns, habitat use and population density of this species is therefore needed to carry out appropriate conservation measures in these areas.
Range extension and high elevation record for the endangered woolly flying squirrel Eupetaurus cinereus in Western Himalaya, India
Authors: Pal Ranjana , Thakur Shagun , Bhattacharya Tapajit , Sathyakumar Sambandam
Published: September 2018

The woolly flying squirrel (Eupetaurus cinereus Thomas, 1888) is one of the least-known endangered mammals of the Himalayas and recorded only from few localities at 2400–3600 m in Hindu Kush and North-Western Himalayas. We report first confirmed record of this species from Upper Bhagirathi Basin, Uttarakhand, Western Himalaya. The squirrel was photo-captured twice in camera traps placed in temperate and alpine habitats. The photo-capture at 4800 m is higher than the described upper elevation range limit of any other flying squirrels. Continuous monitoring would reveal the extent of threats to this rare species in its newly described range.
All-optical controllable electromagnetically induced transparency in coupled silica microbottle cavities
Authors: Zhu Song , Shi Lei , Yuan Shixing , Ma Ruilong , Zhang Xinliang , Fan Xudong
Published: September 2018

An all-optical control scheme of electromagnetically induced transparency (EIT) based on two coupled silica microbottle cavities coated with iron oxide nanoparticles is proposed and experimentally demonstrated. The specially designed and fabricated silica microbottle cavity with a short and spherical end, which is coated with iron oxide nanoparticles, possesses a quality (Q) factor of 1.39×108 and large all-optical tunability in a range of 282.32 GHz (2.25 nm) arising from the strong photothermal effect of the nanoparticles. Based on two coupled silica microbottle cavities, we achieve the EIT spectrum with a transparency window bandwidth of 2.3 MHz. The transparency window can be flexibly controlled by tuning the resonant frequency of the higher-Q microcavity. Besides, by tuning the resonant frequencies of the two microcavities separately, the whole EIT spectrum can be shifted with a range of 71.52 GHz, to the best of our knowledge, for the first time. Based on this scheme, we have realized all-optical and independent control of the transparency window and the whole EIT spectrum. We believe this work has great potential in applications such as light storage, optical sensing, and quantum optics.
Entre éthologie et sémiotique : Mondes animaux, compétences et accommodation
Authors: Renoue Marie , Carlier Pascal
Published: September 2018

Notre projet est, depuis une dizaine d’années, de proposer une approche du comportement animal alternative à celle, quinquagénaire, ubiquitaire et féconde, inaugurée par Thomas A. Sebeok. Née de la rencontre entre l’éthologie cognitive et la sémiotique greimassienne, cette éthosémiotique, moins attentive à la communication, au « paradigme peircien » (Brier 2008), aux signes ou à une modélisation systématique et englobante (comme celle de la biosémiotique de Kull), essaie plutôt de rendre compte de la diversité et d’une altérité animale qui ne soit ni totalement hermétique ni réductrice ni hiérarchique (anthropotéléologique). À partir d’une reprise critique de la notion uexküllienne d’Umwelt, trop fixiste et close, et d’une sémiotisation des notions de compétences phylogénétiques et ontogénétiques, nous proposons de considérer des modèles alternatifs, en particulier : celui du phénoménologue Maurice Merleau-Ponty qui propose en 1942 de distinguer des formes de comportement animal à partir des degrés d’adhérence du sujet à son milieu et celui du psychologue Jean Piaget traitant d’accommodation et d’assimilation, deux notions-clés pour rendre compte de la perméabilité et de la variabilité des sujets animaux. Même si l’exemple final d’une inter-accommodation et intercompréhension possible entre l’homme et son chien peut apparaître comme une invitation ou une incitation à reprendre les derniers travaux de Sebeok sur la communication interspécifique, à croiser un regard déjà formé et une approche en cours d’élaboration, il faut néanmoins noter les difficultés terminologiques, donc conceptuelles et interprétatives que pose toute approche interdisciplinaire.
Translation as sign exploration: A semiotic approach based on Peirce
Authors: Davide Guagnano Giacinto , Mininni Giuseppe
Published: September 2018

What can be translated from one language to another? What relationship exists between the translator and the text being translated? This article shows how Peirce’s semiotics, with its array of concepts that function as tools for the textual analysis, can shed a clarifying light on the explorative nature of a translation. In fact, what is described is the dynamic focusing on a transfer of meaning from one text to another, characteristic of human language, the presence of which can be observed in those circumstances where an “abductive” performance is specifically required, such as in the translation.
Functions of the dative: An Iranian perspective
Authors: Mohammadirad Masoud , Rasekh-Mahand Mohammad
Published: September 2018

In this paper, we give an account of dative functions in a number of Iranian languages from a typological perspective. To analyze the functionality of dative markers in the selected languages, we follow a semantic map approach and take Haspelmath’s map of dative functions as a typological grid to examine our data. We collected our data from descriptive grammars and, for Ossetic and Wakhi, from interviews. The data show that five additional connections should be added to the semantic map of dative functions; these connections are confirmed by data from at least three languages within the Iranian language family. The main semantic property for the dative in Iranian languages is indirect affectedness. Moreover, in some languages spatial functions of the dative are also attested. The distribution of dative functions is mainly explained by the preservation of the oblique case and the areal distribution. In addition, in some languages, a grammaticalization cycle is observed, as a result of which purportedly beneficiary markers are transforming into dative markers.
Physical and Thermal Characterization of Chicken Feather Fiber and Crumb Rubber Reformed Epoxy Resin Hybrid Composite
Authors: Verma Akarsh , Negi Pratibha , Singh V. K.
Published: September 2018

In this experimental investigation, the authors have analyzed the physical and thermal behavior of a chicken feather fiber (CFF) and crumb rubber (CR)-filled epoxy hybrid composite. Chicken feathers were treated with sodium hydroxide to improve their interfacial bonding and were taken in different weight percentages of 1, 3, 5, and 7. A fabricated composite with epoxy resin as the host polymer matrix was prepared using the hand layup technique. These composites with 5 wt. % of CFF and varying weight percentages of CR, e.g., 0, 0.5, 1, 1.5, 2, and 2.5, were analyzed. Results showed that for the hybrid composition, the density and percentage of water absorption increased. Thermal analysis predicted the stability of the hybrid composite, and it was concluded that a composite with 1 wt. % of CR and 5 wt. % of CFF showed the optimum results amongst all other combinations. Moreover, the properties showed significant improvement in the case of the hybrid composite as compared to the pure fiber–based composite.
Utjecaj rizika proizvoda i rizika kupnji na daljnju namjeru online kupnje na C2C tržištu
Authors: Puška Adis , Šadić Sead , Stovrag Jasmin
Published: September 2018

S razvitkom tehnologije i pojavom interneta stvorena su nova tržišta na kojima se odvija kupoprodaja. Prodaju na internetu osim poslovnih subjekta obavljaju i pojedinci. To je C2C kupnja. Ovaj rad istražuje kako rizici online kupnje utječu na namjeru daljnje kupnje kod potrošača. Istraživanje je provedeno na prostoru Bosne i Hercegovine. Obuhvaćena su 419 potrošača. Konceptualnim modelom obuhvaćeno je šest varijabli i to: rizik kupnje, rizik proizvoda, primjena online kupnje, samoefikasnost u online kupnji, vrijednost online kupnje i namjera daljnje kupnje. Postavljeni model ispitan je pomoću modela strukturalnih jednadžbi (SEM) te je dokazano da rizici online kupnje ne utječu izravno na daljnju namjeru kupnje nego posredno preko drugih varijabli. Istraživanje je pokazalo da potrošači koji su samoefikasni u kupnji iskazuju veću namjeru daljnje online kupnje, te potrošači za koje je primjena online kupnje lakša. U teorijskom smislu ovaj rad pridonosi boljem razumijevanju toga kako rizici online kupnje utječu na namjeru daljnje online kupnje na C2C tržištu. Rad u praktičnom smislu pridonosi razumijevanju ponašanja potrošača na C2C tržištu, što može poslužiti prodavateljima za unaprjeđenje ovoga vida online kupnje.
Bihevioralni pristup ekonomiji ‒ objašnjenje tržišnih neefikasnosti s naglaskom na financijsko tržište
Authors: Zelić Mara , Lukavac Marko
Published: September 2018

Tržišne nepravilnosti koje standardna ekonomija nije mogla objasniti potaknule su znanstvenike na sumnju u racionalnost i efikasnost tržišta. Istraživanjima ekonomije u smjeru kognitivne psihologije nastao je multidisciplinarni pristup i novi smjer u ekonomiji – bihevioralna ekonomija. Bihevioralna ekonomija sudionike na tržištu promatra kao iracionalna bića na čije ekonomske odluke utječu brojne heuristike i pristranosti. Međutim, kako kritičari tradicionalnog pristupa smatraju da ponašanje i preferencije sudionika na tržištu nisu uvijek racionalni, tako i kritičari bihevioralne ekonomije tvrde da ljudi nisu toliko prosječni i iracionalni pri donošenju odluka. Svrha bihevioralne teorije nije ukloniti neoklasičnu standardnu ekonomsku teoriju, već tu teoriju poboljšati. Kao kompromisno rješenje između bihevioralnog i tradicionalnog pristupa razvila se nova teorija prilagodljivih tržišta – tzv. AMH – adaptive markets hypothesis. Prema ovoj teoriji, ne vrijedi da je tržišna efikasnost ili savršena ili da ne postoji, nego da je vrlo ovisna o kontekstu.
The Role of Social Media on Students GPA
Authors: Wakil Karzan , Nasraddin Rebwar , Abdulrahan Rajab
Published: September 2018

In academia, social media is an educational tool that can attract students inside and outside classrooms and aﬀect their total success. Using social media can have negative eﬀects on the students like wasting time and social problems which have negative eﬀects on grades and studying performance. In this work, conducted a survey in a basic school at Sulaymaniyah Governorate about the impact of using social media on students, Facebook particularly. We received 127 forms; then our analysis shows that using social media has a negative impact on students’ grades. Students who use Facebook for more than three hours had average grades of (66.88%), (73.59%) for one to three hours, and (%82.93) for less than an hour usage. Overall, every one hour using Facebook, the average score decreases by (%5.35). Therefore, decreasing the duration of using Facebook is helpful to increase the student’s average grades.

Abstrak

Dalam dunia pendidikan media sosial merupakan perangkat pendidikan yang dapat menarik perhatian siswa baik di dalam maupun di luar kelas dan memengaruhi kesuksesan mereka. Salah satunya wujudnya adalah penggunaan media sosial yang berlebihan dan membuahkan masalah-masalah sosial serta berimbas pada prestasi akademik mereka. Dalam penelitian ini peneliti melakukan survei di beberapa sekolah dasar di daerah Sulaimaniyah berkaitan dengan efek penggunaan media sosial, terutama Facebook, terhadap capaian akademik siswa. Balikan survei yang diterima oleh peneliti sejumlah 127 dokumen dan hasil analisis menunjukkan bahwa penggunaan media sosial berimbas negatif pada prestasi siswa. Rinciannya, siswa yang menggunakan Facebook lebih dari tiga jam rata-rata prestasinya 66,88%, untuk penggunaan antara satu hingga tiga jam rata-rata prestasinya 73,59%, dan untuk penggunaan di bawah satu jam rata-rata prestasinya 82,93%. Secara keseluruhan tiap penggunaan Facebook selama satu jam rata-rata prestasi siswa menurun 5,35%, oleh karena itu dapat disimpulkan bahwa pengurangan durasi penggunaan Facebook dapat membantu meningkatkan skor ratarata prestasi siswa

 Keywords: Facebok; educational technology; social media; GPA
Sexual function and combined oral contraceptives: a randomised, placebo-controlled trial
Authors: Lundin Cecilia , Malmborg Agota , Slezak Julia , Danielsson Kristina Gemzell , Bixo Marie , Bengtsdotter Hanna , Marions Lena , Lindh Ingela , Theodorsson Elvar , Hammar Mats , Sundström-Poromaa Inger
Published: September 2018

Objective

The effect of combined oral contraceptives (COCs) on female sexuality has long been a matter of discussion, but placebo-controlled studies are lacking. Thus, the aim of the present study was to investigate if an oestradiol-containing COC influences sexual function.

Design

Investigator-initiated, randomised, double-blinded, placebo-controlled clinical trial where 202 healthy women were randomised to a combined oral contraceptive (1.5 mg oestradiol and 2.5 mg nomegestrol acetate) or placebo for three treatment cycles.

Methods

Sexual function at baseline and during the last week of the final treatment cycle was evaluated by the McCoy Female Sexuality Questionnaire. Serum and hair testosterone levels were assessed at the same time points.

Results

Compared to placebo, COC use was associated with a small decrease in sexual interest (COC median change score: −2.0; interquartile range (IQR): −5.0 to 0.5 vs placebo: −1.0; IQR: −3.0 to 2.0, P = 0.019), which remained following adjustment for change in self-rated depressive symptoms (B = −0.80 ± 0.30, Wald = 7.08, P = 0.008). However, the proportion of women who reported a clinically relevant deterioration in sexual interest did not differ between COC or placebo users (COC 18 (22.2%) vs placebo 16 (17.8%), P = 0.47). Change in other measured aspects of sexual function as well as total score of sexual function did not differ between the two treatments.

Conclusions

This study suggests that use of oestradiol-based COCs is associated with reduced sexual interest. However, the changes are minute, and probably not of clinical relevance.
Discovery of Anthocyanin Acyltransferase1 (AAT1) in Maize Using Genotyping-by-Sequencing (GBS)
Authors: Paulsmeyer Michael N , Brown Patrick J , Juvik John A
Published: September 2018

The reduced acylation phenotype describes the inability of certain accessions of maize (Zea mays [L.]) to produce significant amounts of acylated anthocyanins, which are typically the most abundant pigments. Acylated anthocyanins are important for their association with stability and are therefore important for the various industries using anthocyanins as natural colorants to replace synthetic dyes. Many anthocyanin acyltransferases have been characterized in other species; however, no anthocyanin acyltransferases have been characterized in maize. Therefore, a mapping population was developed from a cross between mutant stock 707G and wild-type acylation line B73 to identify the locus associated with the reduced acylation trait. High-performance liquid chromatography was used to assay the pigment content and composition of 129 F2 lines generated in the mapping population. Recessive alleles of Colorless1, Colored1, and the reduced acylation mutant all decreased anthocyanin content while Intensifier1 increased anthocyanin content in aleurone tissue. The association of increased proportions of acylation with increased anthocyanin content indicates acylation may be important for increasing the stability of anthocyanins in vivo. Genotyping-by-sequencing was used to create SNP markers to map the reduced acylation locus. In the QTL analysis, a segment of Chromosome 1 containing transferase family protein GRMZM2G387394 was found to be significant. A UniformMu Mu transposon knockout of GRMZM2G387394 demonstrated this gene has anthocyanidin malonyltransferase activity and will therefore be named Anthocyanin Acyltransferase1 (AAT1). AAT1 is the first anthocyanin acyltransferase characterized in a monocot species and will increase our knowledge of all acyltransferase family members.
Protein Isoprenylation in Yeast Targets COOH-Terminal Sequences Not Adhering to the CaaX Consensus
Authors: Berger Brittany M , Kim June H , Hildebrandt Emily R , Davis Ian C , Morgan Michael C , Hougland James L , Schmidt Walter K
Published: September 2018

In vitro and in silico studies of the CaaX-type prenyl transferases suggest a wider array of prenylatable sequences than those determined in vivo. Berger and Kim et al. investigate whether this disconnect is due to use of...

Protein isoprenylation targets a subset of COOH-terminal Cxxx tetrapeptide sequences that has been operationally defined as a CaaX motif. The specificity of the farnesyl transferase toward each of the possible 8000 combinations of Cxxx sequences, however, remains largely unresolved. In part, it has been difficult to consolidate results stemming from in vitro and in silico approaches that yield a wider array of prenylatable sequences relative to those known in vivo. We have investigated whether this disconnect results from the multistep complexity of post-translational modification that occurs in vivo to CaaX proteins. For example, the Ras GTPases undergo isoprenylation followed by additional proteolysis and carboxymethylation events at the COOH-terminus. By contrast, Saccharomyces cerevisiae  Hsp40  Ydj1p is isoprenylated but not subject to additional modification. In fact, additional modifications are detrimental to Ydj1p activity in vivo. We have taken advantage of the properties of Ydj1p and a Ydj1p-dependent growth assay to identify sequences that permit Ydj1p isoprenylation in vivo while simultaneously selecting against nonprenylatable and more extensively modified sequences. The recovered sequences are largely nonoverlapping with those previously identified using an in vivo Ras-based yeast reporter. Moreover, most of the sequences are not readily predicted as isoprenylation targets by existing prediction algorithms. Our results reveal that the yeast CaaX-type prenyltransferases can utilize a range of sequence combinations that extend beyond the traditional constraints for CaaX proteins, which implies that more proteins may be isoprenylated than previously considered.
Selection Signatures Underlying Dramatic Male Inflorescence Transformation During Modern Hybrid Maize Breeding
Authors: Gage Joseph L , White Michael R , Edwards Jode W , Kaeppler Shawn , de Leon Natalia
Published: September 2018

Inflorescence capacity plays a crucial role in reproductive fitness in plants, and in production of hybrid crops. Maize is a monoecious species bearing separate male and female flowers (tassel and ear, respectively). The switch from open-pollinated populations of maize to hybrid-based breeding schemes in the early 20th century was accompanied by a dramatic reduction in tassel size, and the trend has continued with modern breeding over the recent decades. The goal of this study was to identify selection signatures in genes that may underlie this dramatic transformation. Using a population of 942 diverse inbred maize accessions and a nested association mapping population comprising three 200-line biparental populations, we measured 15 tassel morphological characteristics by manual and image-based methods. Genome-wide association studies identified 242 single nucleotide polymorphisms significantly associated with measured traits. We compared 41 unselected lines from the Iowa Stiff Stalk Synthetic (BSSS) population to 21 highly selected lines developed by modern commercial breeding programs, and found that tassel size and weight were reduced significantly. We assayed genetic differences between the two groups using three selection statistics: cross population extended haplotype homozogysity, cross-population composite likelihood ratio, and fixation index. All three statistics show evidence of selection at genomic regions associated with tassel morphology relative to genome-wide null distributions. These results support the tremendous effect, both phenotypic and genotypic, that selection has had on maize male inflorescence morphology.
SIETE HIPÓTESIS PARA UNA ESTÉTICA DE LA LIBERACIÓN
Authors: Dussel Enrique
Published: September 2018

Este artículo es un adelanto, pues formará parte de un libro que reúne textos del autor en los que brinda propuestas decoloniales a diversos temas. En él se ofrecen siete hipótesis que arrancan con la definición de estética a partir de los griegos, posicionada, por tanto, como el punto de partida ontológico de toda estética posible, pasa luego a hablar de la obra de arte y arribar a la dimensión ético-política de la estética, al esteticidio de la estética gregorromana, de modo que ello le permita referirse, entonces, a una descolonización de la estética que posibilite la Estética de la Liberación, que es su propuesta.
La utopía conceptual feminista y el discurso literario: dos novelas de Roxana Pinto
Authors: Bonilla Navarro José Francisco
Published: September 2018

Se analiza la representación literaria de los modelos femeninos presentados en dos novelas de Roxana Pinto, desde el paradigma teórico-metodológico que ve el planteamiento feminista como un proceso en construcción en el que pueden incorporarse las contradicciones y el respeto por la diferencia como elementos constitutivos de su propia construcción ontológica. Se acude al concepto de las heterogeneidades no dialécticas, concepto que reafirma la complejidad de los modelos femeninos presentados en los textos. El artículo hace hincapié en que los modelos de feminidad son, en su mayoría, contradictores y complejos.
Échelles bipolaires et représentations culturelles des élèves (Escalas bipolares y representaciones culturales de los aprendientes)
Authors: Barth Arroyo José Pablo , Vargas Murillo María Gabriela
Published: September 2018

représentations culturelles, différentiel sémantique, échelles bipolaires, representaciones culturales, diferencial semántico, escalas bipolares
Riesgo lumbar en la manipulación de barras de hierro en una empresa siderúrgica
Authors: Aguilar Maldonado Miguel Ángel
Published: September 2018

Sr. Editor. El dolor lumbar por manipulación de carga constituye un problema de salud ocupacional que trae como consecuencia la reducción de la movilidad, y discapacidad1,2,3. Así, le comunicamos acerca de un estudio descriptivo y transversal que tuvo como objetivo determinar el nivel de riesgo lumbar en el conteo de barras de hierro, que realizamos el año 2015 en el almacén de la ciudad de Pisco de la empresa siderúrgica Aceros Arequipa. Participaron 40 trabajadores que tuvieron como actividad diaria el conteo de barras de hierro en posición parada y flexión, levantando barras de 30 kg. Se utilizó el método INSHT (Instituto Nacional de Seguridad e Higiene en el Trabajo de España)1 en la determinación del nivel de riesgo lumbar con los datos: peso de la carga, postura, desplazamiento vertical, giro del tronco, agarre de la carga, frecuencia, distancia transportada, según la ecuación de NIOSH que permite calcular un índice de levantamiento que proprciona el nivel de riesgo asociado a una tarea de levantamiento manual (cociente entre peso de carga levantada y límite de peso recomendado).
Comparison of Expectimax and Monte Carlo algorithms in Solving the online 2048 game
Authors: Noa Yarasca Efrain , Nguyen Khoi
Published: September 2018

En el presente trabajo, dos algoritmos de búsqueda: Expectimax y Monte Carlo fueron desarrollados a fin de resolver el conocido juego en línea “2048" y comparar sus resultados. En ambos casos, cinco heurísticas fueron empleadas para obtener posiciones favorables de las fichas dentro del juego. Estas heurísticas fueron combinadas convenientemente para maximizar el puntaje del juego en todas las posibles posiciones. Como resultado el puntaje, el máximo valor de ficha, y el tiempo de cómputo empleado en el juego son mostrados. Además, la eficiencia de cada algoritmo y sus subcasos son presentados. El presente trabajo concluye que el algoritmo de búsqueda Monte-Carlo fue más eficiente en obtener un mayor puntaje que el algoritmo de Expectimax, aunque en un tiempo de cómputo mayor. Incrementos en el nivel de búsqueda en el algoritmo Expectimax y el número de movimientos en el algoritmo de Monte Carlo no necesariamente resultaron en un mayor puntaje del juego.
ANÁLISIS DE LA GESTIÓN DEL GASTO PÚBLICO EN INVERSIÓN Y SU INCIDENCIA SOBRE LA REDUCCIÓN DE LOS NIVELES DE POBREZA EN EL PERÚ.
Authors: Alvarado Tolentino James Manolo
Published: September 2018

Objetivo:  analizar la incidencia de la gestión del gasto público en inversión sobre la reducción de los niveles de pobreza en el Perú, durante el periodo de 1994 al 2015; Método: Se utilizó un método descriptivo y explicativo, de diseño correlacional, de corte longitudinal, el procesamiento de los indicadores se realizó a través del programa Eviews. Resultado y conclusiones   :  la gestión de la inversión pública mejoro la calidad de la formulación y la ejecución de proyectos de inversión pública, el SNIP (Sistema Nacional de Inversión Pública), tuvo un papel importante en el proceso de descentralización (llegando a optimizar la articulación de las políticas nacionales de inversión con las de orden territorial, participación ciudadana, y rendición de cuentas públicas en el marco de la administración pública), la gestión de la inversión pública logro reducir la pobreza, a lo largo de periodo de estudio la gestión del gasto público en inversión  y los niveles de pobreza poseen una relación inversa.
Factores del Ethos de ejecutivos: identidad, identificación y diferenciación. Una aproximación teórica
Authors: Reynoso Espinoza Deivit Wilfredo
Published: September 2018

En el presente artículo se presenta teóricamente la identidad, la identificación y la diferenciación, componentes psicológicos del Ethos de la clase social conformada por los ejecutivos de empresas. La identidad se conforma por el conjunto de características que definen, diferencian y permiten la categorización de un grupo y sus miembros. La identificación es el proceso a través del cual un individuo percibe, asimila y acomoda las cualidades de socialización características de un grupo para formar parte de él. La diferenciación, en cambio a las otras, muestra la búsqueda de la individualidad diferenciadora a otros de modo que esta se presenta de forma equilibrada en los grupos. Estos componentes son algunos de los factores fundamentales para describir el Ethos de una clase social que define el marco subyacente que legitima las conductas intragrupales e intergrupales.