bluuebunny/crossref_metadata_2025 huggingface dataset:
Spatiotemporal Patterns of Population Mobility and Its Determinants in Chinese Cities Based on Travel Big Data
Authors: Yang Zhen , Gao Weijun , Zhao Xueyuan , Hao Chibiao , Xie Xudong
Published: May 2020

Large-scale population mobility has an important impact on the spatial layout of China’s urban systems. Compared with traditional census data, mobile-phone-based travel big data can describe the mobility patterns of a population in a timely, dynamic, complete, and accurate manner. With the travel big dataset supported by Tencent’s location big data, combined with social network analysis (SNA) and a semiparametric geographically weighted regression (SGWR) model, this paper first analyzed the spatiotemporal patterns and characteristics of mobile-data-based population mobility (MBPM), and then revealed the socioeconomic factors related to population mobility during the Spring Festival of 2019, which is the most important festival in China, equivalent to Thanksgiving Day in United States. During this period, the volume of population mobility exceeded 200 million, which became the largest time node of short-term population mobility in the world. The results showed that population mobility presents a spatial structure dominated by two east–west main axes formed by Chengdu, Nanjing, Wuhan, Shanghai; and three north–south main axes formed by Guangzhou, Shenzhen, Shanghai, Wuhan, and Chengdu. The major cities in the four urban agglomerations in China occupy an absolute core position in the population mobility network hierarchy, and the population mobility network presents typical “small world” features and forms 11 closely related groups. Semiparametric geographically weighted regression model results showed that mobile-data-based population mobility variation is significantly related to the value-added of secondary and tertiary industries, foreign capital, average wage, urbanization rate, and value-added of primary industries. When the spatial heterogeneity and nonstationarity was considered, the socioeconomic factors that affect population mobility showed differences between different regions and cities. The patterns of population mobility and determinants explored in this paper can provide a new reference for the balanced development of regional economy.
Selected Elements of Technical Infrastructure in Municipalities Territorially Connected with National Parks
Authors: Kulczyk-Dynowska Alina , Stacherzak Agnieszka
Published: May 2020

The article addresses the problem of selected technical infrastructure elements (e.g., water supply, sewage, gas networks) in municipalities territorially connected with Polish national parks. Therefore, the research refers to the specific areas: both naturally valuable and attractive in terms of tourism. The time range of the research covers the years 2003–2018. The studied networks were characterized based on the statistical analysis using linear ordering methods; synthetic measures of development were applied. It allowed the ranking construction of the examined municipalities in terms of the development level of water supply, sewage, and gas networks. The results show that the period 2003–2018 was characterized by a development of the analyzed networks in the vast majority of municipalities. Thus, the level of anthropopressure caused by the presence of local community and tourists in municipalities showed a decline. It is worth emphasizing that the infrastructure investments are carried out comprehensively. Favoring investments in the development of any of the abovementioned networks was not observed.
Change Management, Digital Maturity, and Green Development: Are Successful Firms Leveraging on Sustainability?
Authors: Irimiás Anna , Mitev Ariel
Published: May 2020

The purpose of this paper is to capture firms’ perceptions on the relationship between change management, digitalization, business performance, and green development. The adaptation of digital technologies has challenged the business environment, leading to a major incorporation of the role of entrepreneurs in the process of fostering green development. Building on data from a survey study with 270 Small and Medium Enterprises (SMEs) and large companies located in a relatively developed Hungarian region and adopting the Strategic Action Field (SAF) theory, firms’ perceptions on change management, digital maturity, and green development were explored. The data was analyzed using partial least squares structural equation modelling (PLS-SEM). Results revealed that change management has a direct positive effect on digital maturity and on business performance and has a small effect on companies’ commitment towards green development. This paper contributes to the debate on the relationship between digitalization and green development within entrepreneurial organizations.
Are the Objectives Proposed by the WHO for Routine Measles Vaccination Coverage and Population Measles Immunity Sufficient to Achieve Measles Elimination from Europe?
Authors: Plans-Rubió Pedro
Published: May 2020

Background: The World Health Organization (WHO) proposed two-dose measles vaccination coverage of at least 95% of the population and percentages of measles immunity in the population of 85%−95% in order to achieve measles elimination in Europe. The objectives of this study were: (1) to determine the measles vaccination coverage required to establish herd immunity against measles viruses with basic reproduction numbers (Ro) ranging from 6 to 60, and (2) to assess whether the objectives proposed by the WHO are sufficient to establish herd immunity against measles viruses. Methods: The herd immunity effects of the recommended objectives were assessed by considering the prevalence of protected individuals required to establish herd immunity against measles viruses with Ro values ranging from 6 to 60. Results: The study found that percentages of two-dose measles vaccination coverage from 88% to 100% could establish herd immunity against measles viruses with Ro from 6 to 19, assuming 95% measles vaccination effectiveness. The study found that the objective of 95% for two-dose measles vaccination coverage proposed by the WHO would not be sufficient to establish herd immunity against measles viruses with Ro ≥ 10, assuming 95% measles vaccination effectiveness. By contrast, a 97% measles vaccination coverage objective was sufficient to establish herd immunity against measles viruses, with Ro values from 6 to 13. Measles immunity levels recommended in individuals aged 1−4 years (≥85%) and 5−9 years (≥90%) might not be sufficient to establish herd immunity against most measles viruses, while those recommended in individuals aged 10 or more years (≥95%) could be sufficient to establish herd immunity against measles viruses with Ro values from 6 to 20. Conclusion: To meet the goal of measles elimination in Europe, it is necessary to achieve percentages of two-dose measles vaccination coverage of at least 97%, and measles immunity levels in children aged 1−9 years of at least 95%.
Induced Polarization as a Proxy for CO2-Rich Groundwater Detection—Evidences from the Ardennes, South-East of Belgium
Authors: Defourny Agathe , Nguyen Frédéric , Collignon Arnaud , Jobé Patrick , Dassargues Alain , Kremer Thomas
Published: May 2020

CO 2 -rich mineral groundwaters are of great economic and touristic interest but their origin and circulation paths in the underground are often poorly understood. A deeper understanding of the system plumbery and the development of non—to minimally—invasive near-surface geophysical methods for the prospection of potential productive areas is therefore of great interest to manage future supply. The objective of this contribution is to assess the ability of the time-domain induced polarization (TDIP) method, combined with the electrical resistivity tomography (ERT) method, to make the distinction between CO 2 -rich groundwater from non-gaseous groundwater. Three combined ERT/TDIP tomographies were performed above known uplift zones in the south-east of Belgium where thousands of CO 2 -rich groundwater springs exist. On all profiles, important contrasts in both electrical resistivity and chargeability distributions were observed in the vicinity of the upflow zone, also reflected in the normalized chargeability sections computed from the measured data. Low resistivity vertical anomalies extending in depth were interpreted as a saturated fracture network enabling the upflow of deep groundwater to the surface. High chargeability anomalies appearing directly close to the CO 2 -rich groundwater springs were inferred to metallic oxides and hydroxides precipitation in the upper part of the aquifer, linked to pressure decrease and changing redox conditions in the up-flowing groundwater approaching the land surface. The combined interpretation of electrical resistivity and induced polarization datasets provides a very promising method for a robust prospection of CO 2 -rich groundwater.
WASP 8: The Next Generation in the 50-year Evolution of USEPA’s Water Quality Model
Authors: Wool Tim , Ambrose Robert B. , Martin James L. , Comer Alex
Published: May 2020

The Water Quality Analysis Simulation Program (WASP) helps users interpret and predict water quality responses to natural phenomena and manmade pollution for various pollution management decisions. WASP is a dynamic compartment-modeling program for aquatic systems, including both the water column and the underlying benthos. WASP allows the user to investigate 1, 2 and 3 dimensional systems and a variety of pollutant types—including both conventional pollutants (e.g., dissolved oxygen, nutrients, phytoplankton, etc.) and toxic materials. WASP has capabilities of linking with hydrodynamic and watershed models which allows for multi-year analyses under varying meteorological and environmental conditions. WASP was originally developed by HydroScience, Inc. in 1970 and was later adapted by the US Environmental Protection Agency’s Large Lakes Research Station (LLRS) for applications to the Great Lakes. The LLRS first publicly released the model in 1981. WASP has undergone continuous development since that time and this year will mark its 50th anniversary. This paper follows the development of WASP from its origin to the latest release of the model in 2020, documenting its evolution and present structure and capabilities.
Emerging details about COVID-19 and chronology of the pandemic in Turkey
Authors: GÖNCÜOĞLU Muammer , AYAZ Naim , CENGİZ Görkem , ONARAN Bahar , ÇUFAOĞLU Gizem
Published: May 2020

Coronaviruses are found in all mammalian and avian species. Due to its mild infection on upper respiratory tract, this virus was not considered as a serious human pathogen until the outbreaks of SARS-CoV and MERS-CoV in 2002 and 2012, respectively. Recently the third and the biggest outbreak of coronavirus “COVID-19” or “SARS-CoV-2” has erupted and the world is now in a struggle to combat this disease. Although everything has not yet been fully clarified about this new type of virus, the data obtained from the studies conducted so far provides guidance on how to deal with SARS-CoV-2. In this context, this review provides information about pathogenesis, clinical symptoms, presence in animals, potential transmission routes of SARS-CoV-2 as well as the detection methods used in the world and Turkey.
Peningkatan Kapasitas Tempat Penampungan Sementara (TPS) Ciroyom Menjadi Stasiun Peralihan Antara (SPA) Berskala Kawasan di Kecamatan Andir, Kota Bandung
Authors: Widyarsana I Made Wahyu , Daniel Oloan Ivan
Published: May 2020

Ciroyom TPS is one of the waste facilities in Andir Sub-district. Ciroyom TPS is managed by PD Kebersihan Kota Bandung which works as temporary solid waste collection from residential and Ciroyom Market. The large area of the TPS Ciroyom service area, which is 5 out of 6 villages that produce large amounts of waste that reaches 45.43 tonnes/day. It makes the amount of waste transportation from TPS to TPA reach 12 ritation/day. The distance from TPS (Tempat Penampungan Sementara) Ciroyom to Sarimukti Regional Landfill which requires 44 km is a major consideration needed by the Waste Transfer Station (SPA, Stasiun Peralihan Antara) for regional scale. SPA takes in reducing the volume of waste so that it can reduce the ratio of garbage transportation to landfill (TPA, Tempat Pemrosesan Akhir). With adequate land area, TPS Ciroyom has the potential to improve its function to become SPA for regional scale. Through the analysis of several alternative concepts and development scenarios, the amount of waste generated will be managed at the SPA Ciroyom for the next 10 years. The main facilities designed at the SPA Ciroyom for regional scale are waste compaction units resulting in volume reduction with the vertical compression method. Through solidification of waste, residual waste classified as residues is expected to reduce the volume by 60-70%. In addition, other facilities are provided which are designed at Ciroyom Area Scale SPA such as waste sorting facilities using conveyor belts, organic waste processing with open windrow systems, and inorganic waste recovery facilities that still have selling points.
Synthesis of copper particles and elimination of cupric ions by chemical reduction
Authors: Mahfouf Esma , Djerad Souad , Bouchareb Raouf
Published: May 2020

Development of enhanced methods for copper particles synthesis is crucial for the improvement of material science and technology. Therefore, in this study a successful synthesis of copper metal was achieved by chemical reduction. Ascorbic acid was used as a reducing agent. In the presence of soda, copper sulphate pentahydrated (CuSO4, 5H2O) with acid ascorbic at 60 °C of temperature produced metallic copper powder with the total degradation (100%) of copper ions (Cu2+). The presence of hydroxide ions (OH-) is necessary to achieve and improve the chemical reduction reaction. Several parameters, as reducing agent volume, reaction temperature and soda quantity were investigated and checked their impact in this research study. The obtained powder was washed and dried in the fresh air then analysed by X-ray diffraction.
Dataset of Vietnamese student's learning habits during COVID-19
Authors: Tran Trung , Hoang Anh-Duc , Nguyen Tien Trung , Dinh Viet-Hung , Nguyen Chi Yen , Pham Hiep-Hung
Published: May 2020

A dataset was constructed to examine Vietnamese student’s learning habits during the time schools were suspended due to the novel coronavirus - SARS-CoV-2 (COVID-19), in response to a call for interdisciplinary research on the potential effects of the coronavirus pandemic (Elsevier, 2020). The questionnaires were spread over a network of educational communities on Facebook from February 7 to February 28, 2020. Using the snowball sampling method, researchers delivered the survey to teachers and parents to provide formal consent before they forwarded it to their students and children. In order to measure the influence of students’ socioeconomic status and occupational aspirations on their learning habits during school closures, the survey included three major groups of questions: (1) Individual demographics, including family socioeconomic status, school type, and occupational aspirations; (2) Student’s learning habits, including hours of learning before and during the period of school suspension, with and without other people’s support; and (3) Students’ perceptions of their self-learning during the school closures. There was a total of 920 clicks on the survey link, but only 460 responses accompanied by consent forms were received. Non-credible answers (e.g., year of birth after 2009, more than 20 hours of learning per day) were eliminated. The final dataset included 420 valid observations.
Middle Test Ilmu Sejarah. Madinatul Munawarah. 1910128220007
Authors: Munawarah Madinatul
Published: May 2020

Tugas ini saya menjelaskan tentang sejarah pendidikan di Indonesia sebelum adanya sekolah pendidikan sudah terjadi dan sudah berjalan. Di era kerajaan pun begitu. Pada masa Hindu-Budha dan Islam pun pendidikan juga berkembang. Dan di era kolonialisme juga terjadi pendidikan. Serta adanya pengaruh budaya asing terhadap pendidikan di Indonesia ini. Serta konsep IPS yang termasuk dalam kepenulisan ini.
Middle Test Ilmu Sejarah, Madinatul Munawarah, 1910128220007, Kelas A1, Pendidikan IPS
Authors: Munawarah Madinatul
Published: May 2020

Tugas ini saya menjelaskan tentang sejarah pendidikan di Indonesia sebelum adanya sekolah pendidikan sudah terjadi dan sudah berjalan. Di era kerajaan pun begitu. Pada masa Hindu-Budha dan Islam pun pendidikan juga berkembang. Dan di era kolonialisme juga terjadi pendidikan. Serta adanya pengaruh budaya asing terhadap pendidikan di Indonesia ini. Serta konsep IPS yang termasuk dalam kepenulisan ini.
Efeito dos alfa-bloqueadores no tratamento da ureterolitíase distal – uma revisão sistemática e meta-análise
Authors: Frarlley Santos e Miranda Leandro
Published: May 2020

INTRODUÇÃO: o uso de alfa-bloqueadores no contexto da terapia médica expulsiva para cálculos ureterais tem sido opção importante para manejo de pacientes com dor lombar não complicada. O objetivo deste trabalho é avaliar a eficácia da terapia expulsiva com alfa-bloqueadores para cálculos ureterais distais e resumir as melhores evidências em um algoritmo geral de orientação. MÉTODO: revisão sistemática foi realizada em fevereiro de 2018, no banco de dados do PubMed/MedLine, com estratégia de busca avançada para seleção de ensaios clínicos randomizados sobre o uso dos alfa-bloqueadores no manejo de paciente com ureterolitíase distal. Os dados foram compilados e meta-analisados em relação à taxa de eliminação e de acordo com o tamanho do cálculo. RESULTADOS: foram selecionados 29 estudos com dados de 6.216 pacientes. A taxa geral de eliminação foi maior com uso de alfa-bloqueador (OR=3,05; IC95% 2,38-3,91; p<0,0001), comparativamente à terapia padrão. O efeito se deveu basicamente aos cálculos > 5mm (OR= 2,33; IC95% 1,92 a 2,83; p<0,0001), não tendo evidenciado efeito significativo para cálculos <5mm (RR= 1,14; IC95% 0,99 a 1,31; p=0,0505). Alfa-bloqueador também reduziu o tempo de eliminação em pouco mais de 2 dias (MD= -2,32; IC95% -3,40 a -1,24; p<0,0001), sem aumentar a quantidade relatada de efeitos adversos (RR= 1,27; IC95% 0,98 a 1,66; p= 0,065). CONCLUSÃO: o uso de alfa-bloqueador é eficaz e seguro no contexto da terapia expulsiva e está indicado para cálculos ureterais distais entre 5 e 10mm de diâmetro.
EVALUASI KINERJA PROGRAM STUDI EKONOMI SYARIAH FAKULTAS EKONOMI DAN BISNIS ISLAM IAIN SAMARINDA PASCA AKREDITASI
Authors: Yusran Yusran , Nasution Rachmad Saleh
Published: May 2020

This study aims to determine the perception of the IAIN lecturer at the Faculty of Economics and Islamic Business. This research method uses qualitative methods with data collection techniques such as questionnaires and data analysis using descriptive analysis. This study found that the 6 performance standards set by BANT PT, namely standard 1 about vision and mission, goals and objectives and achievement strategies, standard 2 governance, leadership, management and quality assurance systems, standard 4 human resources, and standard 5 learning curriculum and academic atmosphere, standard 6 for financing facilities and infrastructure as well as information systems, and standard 7 related to research, service and community service and collaboration in general are felt by lecturers in the satisfied or good category.

 
Virus, Vaccine, and Value in a Curved Universe
Authors: Inayatullah Naeem
Published: May 2020

Don’t we need to flatten the death rate that results from our differential valuation of human beings? In a curved universe, everyone is both in front of us and behind us, and always within our reach. I want to say that our wealth, our income, and our value accrue to us simply because we are all human beings – parts of a whole. Human beings have a right to life.
Facts and Anomalies to Keep in Perspective When Designing an Artificial Intelligence
Authors: Ipe Navin
Published: May 2020

The design of any artificial intelligence is an interdisciplinary pursuit that requires keeping within perspective, the various properties of matter and life in the known universe, while remaining cautious of biases and misconceptions that arise from the limitations of prior learning, available tools and sensory capabilities. This paper curates a vast collection of human knowledge gathered during the process of exploring and questioning the fundamentals of why the mechanisms that constitute life were built in specific ways, and re-questioning those facts using anomalies that sometimes contradict or expose errors in human assumptions of life and intelligence. A meta-analysis of such knowledge at a single glance also helps identify interesting patterns in various phenomena that can in-time, spur creative solutions, alter the direction of research, assist with intelligent inferences and hopefully result in the identification and creation of artificial intelligence.
The Long-Term Impact of Study Abroad on Honors Program Alumni
Authors: Mulvaney Mary Kay
Published: May 2020

This article presents a study that presents an analysis of the long-term effects of study abroad on students from Elmhurst College Honors Program alumni from the classes of 2005-2014.
(Mis)representation among U.S. study abroad programs traveling to the African continent: A critical content analysis of a Teach Abroad program
Authors: Onyenekwu Ifeyinwa , Angeli Julianne , Pinto Ransford , Douglas Ty’Ron
Published: May 2020

As study abroad programs continue to increase and expand the places they send students, it is important for colleges and universities to pay close attention to the depictions of the African continent in promotional materials. While existing literature in the field of tourism, social work, and African studies have analyzed images of the cultural Other in study abroad text, there is a paucity of higher education and student affairs research that utilizes postcolonial theory to analyze representations of teach abroad programs. To address this gap, this research undertakes a critical content analysis of promotional material of a teach abroad program and finds that promotional materials remain fixated on representing the African continent in a hegemonic way that reinforces white savior complex, culturalism, and the poverty porn discourse. Ultimately, we argue colleges will need to make purposeful efforts in order to achieve new visions of African countries by deconstructing mainstream stereotypes.
An investigation of experiential and transformative learning in study abroad programs
Authors: Strange Hannah , Gibson Heather
Published: May 2020

Despite criticism of their outcomes, students are increasingly participating in short-term study abroad programs. This study used transformative learning theory (TLT) to investigate the effects of program type and length on transformative learning (TL), and in particular explore the impact of experiential learning components on TL. Students from a large US university were surveyed on-line upon returning home from summer study abroad (N=216). Data were analyzed using frequencies, ANOVA, and thematic content analyses. No significant differences in TL were found among program types. However, the shortest programs (< 18 days) yielded significantly lower levels of TL than programs ranging 19 to 50+ days. While the shortest programs may not achieve the same degree of TL, students may not need to be abroad for a semester to experience change. This is one of the first studies to provide empirical support for this contention and is a starting point for future research.
Charting the New Territory of the Scholar-Practitioner in U.S. Higher Education: A review of Streitwieser, B. & Ogden, A. (eds.), International Higher Education’s Scholar-Practitioners: Bridging Research and Practice.
Authors: Contreras Jr. Eduardo
Published: May 2020

International Higher Education's Scholar-Practitioners: Bridging Research and Practice. Steitwieser, B. & Ogden, A. (Editors). Oxford, UK: Symposium Books. 2016. [340 pages].
Teaching Mathematics in Multi-Lingual Classrooms: Developing Intercultural Competence via a Study Abroad Program
Authors: Kasmer Lisa Ann , Billings Esther
Published: May 2020

This study investigated how a study abroad experience teaching mathematics in Tanzania, Africa impacted a group of secondary education pre-service teachers’ (PSTs) from the United States. In particular, we discuss their ability to facilitate the learning of students in multi-lingual mathematics classrooms while personally developing intercultural competence. We examined three areas: the PSTs’ knowledge and comprehension, skills, and attitudes in an effort to understand their ability to teach in multilingual classrooms.
Using a PRISM for Reflecting: Providing Tools for Study Abroad Students to Increase their Intercultural Competency
Authors: Williams Tracy Rundstrom
Published: May 2020

Numerous studies have shown that simply being in another culture does not guarantee the development of intercultural competence. Students need guidance to seek out opportunities to engage and to make sense of those experiences. Reflection has become a popular methodology to assist students with this. Unfortunately, students often do not know how to do reflective writing or do not have cultural incidents to write about. This research examines one approach to guiding reflection: the use of prompt questions to elicit thoughtful responses and the integration of readings to provide context and grounding. This study demonstrates that reflective writing can be an effective tool for intervening in student learning abroad if done with structure and intentionality.
Doing More With Less: Civic Practices for Longer-Term Impact in Global Service Learning
Authors: Alonso García Nuria , Longo Nicholas V.
Published: May 2020

This essay explores the potential value of short-term study abroad experiences within the unique framework of a new global service-learning program at Providence College which connects international with local engagement as a way to “do more with less.” Authors first introduce a typology for global service-learning, illustrating how this model fits within current approaches to international service-learning.  They then describe a case study, Voices Across Borders, the global service-learning program which provides opportunities for students to engage with rural Nicaraguan and urban Providence youth through projects that harness the power of storytelling to make connections across borders. Based on the lessons from this effort, the essay offers a set of civic practices that can support the longer-term impact of short-term global service-learning, including i) fostering storytelling across borders; ii) cultivating students as partners; iii) developing reciprocal community partnerships; and iv)creating public work, visual, auditory or performing public artifacts. After describing the challenges for short-term international engagement, the authors conclude that global service-learning initiatives might more appropriately be focused on collaborative learning, rather than service, as a way of thinking more comprehensively about the entire global “ecology of education” which links learning at the international and local levels.
Components of Reflection: A Longitudinal Analysis of Study Abroad Student Blog Posts
Authors: Savicki Victor , Price Michele V.
Published: May 2020

Reflection supports actively transforming perspectives regarding study abroad experiences. The current study examines the "how" of reflection. Content of reflections is dictated by questions posed. The process of reflection is less prescribed yet revealing of paths to student understanding.  Students posted to a web log (blog) over six time periods during their study abroad sojourn. Five reflection components were identified and tracked via cognitively complex processes and emotional aspects of their writings as analyzed by linguistic inquiry computer software.  Changes in language usage revealed patterns of how students reflected. A precipitous drop in identifying distinctions between self and the host culture during immersion seemed to indicate an intense struggle attempting to make meaning of their experience. Also, findings highlighted markedly conflicted feelings both at pre-departure and upon reentry.  Linguistic analysis proved promising for both assessment and design of reflective prompts.
Studios Abroad: A Challenge in Innovative Pedagogy
Authors: Macedo Joseli
Published: May 2020

Study abroad programs offer a unique opportunity to evaluate pedagogic models. The role of studios in design and planning pedagogy has been examined; however, how the general framework of a studio supports other pedagogic models has not been widely discussed. This article assesses a series of urban planning and design studios conducted abroad to illustrate how studios can be enabling environments for urban planning and design students to develop fundamental skills. The article also discusses how interdisciplinary studios expose urban planning students to diverse thinking processes and approaches. The studio environment gives students the opportunity to consider creative alternatives outside of their general planning paradigm. An analysis of learning outcomes supports the conclusion that studios offer a fertile ground for students to experiment and develop ideas; they are essential to urban planning education and allow students to develop a deeper perspective on their profession.
Feeling Our Way: Emotions and the Politics of Global Citizenship in Study Abroad Programming
Authors: Laliberté Nicole , Waddell Charlene
Published: May 2020

The terms ‘solidarity’ and ‘ethical travel’ were used to frame a one-week study abroad program to Guatemala. The students involved came from a Canadian university and were primed through pre-trip meetings and program materials to expect their trip to produce good feelings of connection and support. However, many of the students experienced bad feelings that were variously described as frustration, disappointment, shame, and guilt. In this paper, we take the ‘bad feelings’ of this trip seriously to understand the relationship between this study abroad program and the (re)production of privilege. Based on interviews with student participants, we identify a trio of emotional responses –shame/guilt, frustration/anger, and critical empathy– that highlight the variability of student responses and their political implications. We argue that this critical analysis of emotional politics is an underutilized tool for examining how study abroad programs can simultaneously (re)produce and challenge privilege.
Stereotype Threat in U.S. Students Abroad: Negotiating American Identity in the Age of Trump
Authors: Goldstein Susan B.
Published: May 2020

An underinvestigated and significant source of stress for U.S. student sojourners across racial/ethnic groups is exposure to stereotypes that target their American identity.  This study built on the extensive research literature on stereotype threat to investigate U.S. students’ vulnerability and reactions to being the target of stereotypes. Stereotype threat occurs when one expects to be judged negatively based on stereotypes of one’s social group and feels at risk of confirming these stereotypes.  An online questionnaire administered to 95 students studying abroad just prior to and following the 2016 U.S. presidential election assessed predictors of, and common responses to, stereotype threat.  Multiple regression analysis identified participant gender, CQ-Motivation, and exposure to Trump-related stereotypes as significant predictors of stereotype threat.  Exploratory analyses indicated possible responses to stereotype threat, including distancing from a U.S. American identity and altering one’s appearance and behavior to look less American. Implications for sojourner support and for future research are discussed.
Síndromes dolorosos de retropié y tobillo
Authors: Català-de-las-Marinas Juan , Navarro Elena , Navarrete-Faubel Enrique
Published: May 2020

Los esguinces de tobillo son una de las lesiones más comunes en la vida diaria y deportiva. En ciertas ocasiones, van a producir un dolor a nivel del retropié y del tobillo a largo plazo. Hasta un 20% de las podrán producir una inestabilidad crónica de tobillo. Además, pueden ser causa de la subluxación de los peroneospor una lesión del retináculo, o la lesión osteocondral del astrágalo, pudiéndose combinar las lesiones en un mismo paciente. Esto puede ser causa de dolor crónico en pacientes que han presentado un esguince previo. La exploración clínica es fundamental y puede llamar la atención una falta de control sobre la articulación, un dolor a punta de dedo o la sensación de los tendones peroneos sobre el peroné. Es fundamental valorar los ejes del retropié. Para hacer un tratamiento adecuado, es fundamental acertar en el diagnóstico, y comenzar con una rehabilitación funcional y preventiva. Si el tratamiento conservador no es suficiente, en el caso de la inestabilidad crónica de tobillo, la primera opción quirúrgica a valorar será la reparación ligamentosa directa o anatómica (abierta o artroscópica). En el caso, de que los ligamentos no sean suficientemente resistentes, utilizaremos técnicas de reconstrucción anatómicas, con diferentes injertos como refuerzo. En los casos que fracasen, o en estabilidades muy evolucionadas, optaremos por las técnicas no anatómicas. Es importante evaluar el estado articular en su conjunto, asociando técnicas artroscópicas para valorar posibles lesiones condrales asociadas. En el caso de la subluxación de peroneos, es importante valorarla en dentro del diagnóstico diferencial, para poder diagnosticarla de forma aguda, y llevar a cabo un tratamiento conservador adecuado mediante inmovilización y descarga durante seis semanas. En los casos de subluxación de los tendones peroneosy dolor lateral, el tratamiento quirúrgico será la profundización del surco de los peroneos, ya sea mediante visión tenoscópica o abierto, o reconstrucción del retináculoperoneal. La osteocondritisde astrágalo es otra posible causa de dolor en retropié y tobillo donde es fundamental descartar una inestabilidad asociada a esta lesión. Trataremos de llevar a cabo un tratamiento conservador en pacientes asintomáticos, lesiones agudas o no desplazadas inmovilizando y haciendo descarga durante seis semanas. En caso de plantearse el tratamiento quirúrgico, atenderemos a diversos factores, en función de los cuales decidiremos entre las diversas técnicas quirúrigicas.
Osteocondritis disecante: una revisión bibliográfica
de actualidad
Authors: Alonso-Caravaca Adrián
Published: May 2020

La osteocondritis disecante es una enfermedad que aparece más frecuentemente en varones jóvenes, a nivel de la rodilla, y con mejor pronóstico a esas edades tempranas. Su etiopatogenia se considera multifactorial, influyendo la interacción de aspectos constitucionales y del metabolismo, con otros mecánicos (siendo éstos últimos, como los microtraumatismos, de mayor relevancia actualmente). El dolor a la carga es el síntoma más frecuente (80%), y para su diagnóstico nos apoyaremos en radiografías simples, Tomografía Computarizada (TC) y Resonancia Magnética (RM), pero el gold-standard es artroscópico. En cuanto al tratamiento de la enfermedad, primero se intenta actuar con terapias conservadoras, y posteriormente cobra importancia la cirugía. Existen dos bloques de tratamiento quirúrigo: el reparativo (técnicas de fijación in situ, micro-/nanoperforaciones) y el sustitutivo (injerto óseo autólogo, injertos osteocondrales de diversa naturaleza, cultivos de condrocitos y, como última opción la artroplastia). En la literatura existe gran discusión acerca del manejo, que depende en su mayoría de factores como el tamaño de la lesión, la demanda funcional del paciente o la edad, sin embargo, no hay consenso, y cada autor suele proponer un algoritmo diferente. Tampoco se ha encontrado en la literatura evidencia lo suficientemente potente que permita recomendar un tratamiento en concreta, siendo cierto que el cultivo autólogo de condrocitos parece una opción muy prometedora cuando se desarrolle por completo. Si hay algo seguro en esta enfermedad, es que hay que tratar primero la deformidad que la ocasiona (en caso de haberla), y adecuar e individualizar los tratamientos, de manera que no sobre-/infratratemos a los pacientes
Linburg-Comstock syndrome: a case report
Authors: Gonzalo Sánchez-Ponce , Elia Mas-Martínez , Antonio Sánchez-Jiménez , V Zaballos-Carpintero
Published: May 2020

La variante de Linburg-Comstock consiste en una conexión tendinosa anómala entre los tendones flexor pollicislongus (FPL) y más frecuentemente el flexor digitorum profundus (FDP), provocando incapacidad para la flexión aislada del primer dedo. Se puede manifestar como dolor intermitente en la superficie volar del antebrazo, entumecimiento en los dedos, hormigueo y dolor nocturno. Puede tratarse con éxito mediante escisión quirúrgica y para su diagnóstico cabe destacar la utilidad de la ecografía dinámica musculo-esquelética, disponible en nuestras consultas, como instrumento útil y eficiente para el diagnóstico de sospecha de la misma
Fracturas de espinas tibiales en la edad pediátrica: revisión
Authors: Álvaro Daràs-Ballester , Marta Salom-Taverner
Published: May 2020

Objetivo de la revisión: Pese a que las fracturas de espinas tibiales son poco frecuentes, su importancia debe ser tenida en cuenta debido a su proximidad a la fisis proximal de tibia, así como su relación con la inserción de ligamento cruzado anterior, uno de los más importantes estabilizadores de la rodilla. Esta revisión tiene como objetivo sintetizar los conceptos acerca del diagnóstico, manejo y pronóstico de dichas lesiones descritos por la literatura más actualizada.
Conceptos novedosos: la literatura actual describe la existencia de diferentes modalidades de tratamiento tanto conservador como quirúrgico, sin determinar claras diferencias entre ellas a largo plazo. No obstante, se establecen criterios para orientar el tratamiento de las mismas en función de las características del paciente y de la fractura.
Resumen: las fracturas de espinas tibiales en la edad pediátrica son lesiones poco frecuentes. Generalmente es la clínica y el mecanismo lesional los que hacen sospechar estas fracturas, y el diagnóstico definitivo se consigue con pruebas de imagen, siendo necesaria, en ocasiones, la realización de TC o RM. En cuanto al tratamiento de estas fracturas, no existe un consenso claro, debido a la gran variedad de opciones terapéuticas, pero sí puede afirmarse que el tratamiento de elección para las fracturas desplazadas es la reducción y fijación de forma quirúrgica.
Pasteurella Multocida tenosynovitis of the flexor pollicis longus caused by a rabbit bone wound
Authors: Alejandro Blasco , Borja Cuñat-Aragó , Emilio Baixauli , Jose Amaya-Valero
Published: May 2020

A 29-year-old man was admitted to our emergency department with a painful thumb, feverredness, and swelling and limited function. Five days before he was wounded with a rabbitbone. He was given amoxicillin-clavulanate with a lack of improvement. He was admitted forhospitalization and an ultrasound confirmed tenosynovitis as well as subcutaneous edema, sosurgical debridement was performed. Cultures were positive to Pasteurella multocida.Hospital stay was 9 days, and he continued oral antibiotic for 10 days after discharge. Fourmonths postoperatively, the patient had complete function and didn’t show evidence ofrecurrence. To conclude, rapidly developing cellulitis, tenosynovitis, fever and drainage fromhand wounds after a cat or dog bites should suggest Pasteurella multocida infection.However, P. multocida tenosynovitis can be also produced after a rabbit bone wound.Absence of response after 24-48 of antibiotic treatment, especially if cellulitis has progressedto tenosynovitis, is an indication for surgery.
Luxaciones de codo asociadas a fracturas de cúbito proximal (apófisis coronoides/olecranon)
Authors: Fernando Bonilla-Enseñat
Published: May 2020

Resumen: El codo es la segunda articulación del cuerpo que más luxaciones sufre, tras el hombro y la primera en la infancia. Hasta en un 25% de los casos se asocia a fracturas de estructuras implicadas en la estabilidad articular, siendo la más importante la bisagra húmero-cubital. Cuando el cirujano se enfrenta a una fractura luxación de codo debe realizarse a sí mismo las siguientes preguntas: ¿qué estructuras óseas están afectadas?, ¿es conveniente osteosintetizarlas y qué secuencia debería seguir? ¿es necesario realizar algún gesto sobre los ligamentos colaterales? ¿cuál es el mejor abordaje de codo para el caso? ¿qué protocolo postoperatorio debería seguir?.
Objetivo:En esta revisión trataremos de resolver estas preguntas centradas en concreto en las luxaciones de codo asociadas a fracturas del extremo proximal del cúbito, es decir asociadas a afectación de apófisis coroides y olécranon.
Actualización en materia de cirugía ortopédica y traumatología de la repercusión clínica de la utilización de PRGF: plasm rich in growth factors
Authors: Daniel Salamanca-Rodríguez , Cristina Corral Martinez , A Pastor Zaplana , V Rico Ramirez , M.C Escuder Capafons
Published: May 2020

Objective: Update on plasma rich in growth factors (PRGF) in the field of orthopedic surgery and traumatology. Method: Review of 136 studies on PRGF relevant in the field of orthopedic surgery and traumatology published in the last 10 years. Results: The largest number of studies on PRGF has been performed in the field of osteoarthritis of the knee (25%), followed closely by the comparative studies between PRGF and hyaluronic acid (19%). The studies on ligamentous and tendinous pathology (14%), the joint pathology different from the knee (10%).The remaining studies addressed pseudoarthrosis, osteonecrosis and nerve regeneration among others. The most commonly used platelet products were Plasma Rich in Platelets (73%), Plasma Rich in Growth Factors (15%) and Plasma Rich in Fibrin (12%). Conclusions: To document the preparation of platelet prod-ucts, establish the precise concentration of growth factors and carry out long-term follow-up is es-sential for future studies.
La subluxación rotatoria de la columna en la neurofibromatosis tipo I: aplicación de la vía infra-axilar
Authors: Raquel Garrido-Rojo , Vicent Simón-Pérez , Julio Deserio-Cuesta , Marta García-Chamorro , Teresa Bas-Hermida
Published: May 2020

Introducción
El 60% de los pacientes con neurofibromatosis asocian distrofias vertebrales y deformidades de la columna, la mayoría cifoescoliosis altas y muy angulosas, donde las vértebras progresivamente se dislocan ejerciendo un cizallamiento del canal medular que da lugar a severas alteraciones neurológicas. En estos pacientes continúa siendo un reto el abordaje de la deformidad mediante las vías habituales; por ello describimos una reciente técnica realizando una toracotomía infraaxilar.
Material y métodos
Presentamos el caso de una mujer de 9 años con NF tipo I y cifoescoliosis dorsal alta de convexidad izquierda (doble curva torácica T1-T5 de 71º izquierda y T5-T10 de 90º derecha, con una cifosis angular de 59º), con exploración neurológica normal. Previo periodo de tracción raquídea nos disponemos a realizar una artrodesis posterior, pero al colocar a la paciente en decúbito prono en la mesa quirúrgica se produce una abolición de los potenciales evocados motores que obliga a suspender la intervención.
Resultados
La solución fue realizar una toracotomía infraaxilar izquierda, abordando la curva desde la convexidad. Se colocó a la paciente en decúbito lateral derecho a 70º y se realizó una resección costal dos o tres niveles por encima del ápex de la deformidad. Después de una cuidadosa disección manteniéndose cerca de la pared torácica, se realizó una descompresión y discetomía anterior a nivel del ápex. A continuación se colocó en la concavidad dos aloinjertos tibiales «en puntal», a modo de empalizada, para soportar las fuerzas de compresión. En un segundo tiempo se realizó un abordaje posterior instrumentado para conseguir una artrodesis circunferencial y una óptima estabilidad.
Conclusión
La técnica presentada permite el acceso a la columna torácica alta de forma directa y segura, al no implicar estructuras vitales incluyendo los grandes vasos o el conducto torácico como lo podían hacer los abordajes clásicos. Se trata de una técnica prometedora con buenos resultados clínicos, que puede ser utilizada para el tratamiento de las deformidades cifóticas donde se ha visto que los abordajes posteriores únicos fallan, pero también de inestabilidades, compresiones medulares u otras patologías del cuerpo vertebral ya que puede conseguir una buena exposición de los mismos.
Bloqueos locoregionales anestésicos en urgencias de traumatología. WALANT Surgery
Authors: Ortega-Yago Amparo , Baixauli-Perelló Emilio
Published: May 2020

En traumatología cada vez está más extendido el uso de técnicas de anestesia loco regionales, tanto para la urgencia traumatológica como también para cirugías de miembro superior e inferior.

Mediante el aprendizaje de estas técnicas, se puede llevar a cabo, y sin necesidad de realizar una anestesia general, diversos procedimientos que facilitan una mayor recuperación del paciente e incluso su colaboración mientras se está realizando la intervención, gracias a la técnicaWalant (Wide awake, local, anesthesia, no tourniquet)

Para ello, será necesario un buen conocimiento tanto de la anatomía, como de las características de los anestésicos y de los coadyuvantes que utilizaremos para realizar los bloqueos locorregionales
ANALISIS KESALAHAN SISWA DALAM MENYELESAIKAN SOAL CERITA BERDASARKAN ANALISIS NEWMAN DI KELAS X SMA INTENSIF TARUNA PEMBANGUNAN SURABAYA
Authors: Moh.Syukron Maftuh
Published: May 2020

Penelitian ini merupakan penelitian deskriptif dengan pendekatan kuantitatif. Subjek penelitian ini adalah 34 siswa kelas X MIA 2 SMA Intensif Taruna Pembangunan tahun ajaran 2019/2020 yang kemudian diberikan tes tertulis berupa soal cerita dan di ambil 3 siswa yang melakukan kesalahan terbanyak untuk dilakukan wawancara. Kemudian data yang diperolah dilakukan reduksi data, penyajikan data dalam bentuk tabel untuk dideskripsikan yang kemudian diambil kesimpulan. Berikut berdasarkan hasil analisis data diperoleh hasil penelitian bahwa (1)  Pada tahap membaca siswa tidak mengalami kesulitan, sehingga tidak ada kesahan pada tahap membaca. (2) Pada tahap memahami, kesalahan yang dilakukan siswa sebanyak 37.15%. yang meliputi kesalahan pada saat mengidentifikasi perintah pada soal, sehingga salah dalam menentukan apa yang diketahui dan apa yang ditanyakan dalam soal serta melakukan kesalahan dalam mengubah konteks masalah soal cerita menjadi bahasa sendiri yang berpengaruh pada proses penyelesaian soal, (3) Pada tahap transformasi, kesalahan yang dilakukan siswa sebanyak 13.04%. yang meliputi siswa tidak dapat menerjemahkan kesalahannya dan mentransformasi formasi yang ada pada soal ke dalam bentuk kalimat matematika, serta kurangnya pemahaman untuk menggunakan metode yang akan digunakan. (4) Pada tahap ketrampilan proses, kesalahan yang dilakukan siswa sebanyak 20.94%. yang meliputi siswa masih melakukan kesalahan dalam proses perhitungan, diantaranya pada saat memindahkan suku ke ruas yang berbeda serta dalam menjumlahkan dua suku yang variabelnya sama. Selain itu siswa juga melakukan kesalahan dalam proses eliminasi dan substitusi yaitu ketika melakukan operasi perkalian, penjumlahan, dan pengurangan serta kurangnya pemahaman operasi apa yang akan digunakan. Dan (5) pada tahap penulisan jawaban akhir, kesalahan yang dilakukan siswa sebanyak 28.85%. yang meliputi siswa tidak menuliskan kesimpulan dari solusi yang diperoleh dengan tepat, bahkan sebagian siswa tidak mengubah solusi yang diperoleh ke dalam bentuk kalimat sesuai dengan permasalahan nyata yang diketahui pada soal.