bluuebunny/crossref_metadata_2025_split huggingface dataset:
Short-term, low-dose fluoxetine prevents oestrous cycle-linked increase in anxiety-like behaviour in female rats
Authors: Machado Figueiredo Rebeca , de Carvalho Milene Cristina , Brandão Marcus Lira , Lovick Thelma Anderson 
Published: April 2019

Background and aims: We sought a robust behavioural test that evoked increased anxiety-like behaviour during the late dioestrus phase of the oestrous cycle (similar to the premenstrual period in women) and tested whether this could be prevented by acute low-dose fluoxetine (FLX). Methods: Female Wistar rats in different stages of their cycle were exposed to four different tests of anxiety-like behaviour. Results: No oestrous cycle differences were detected in fear potentiated startle or conditioned freezing to an aversive context. In a light switch-off test where rats move from one compartment of a shuttle-box to the other to turn off an aversive light, females displayed enhanced responding in late dioestrus. During isolation restraint stress females in late dioestrus emitted three times more 22 kHz ultrasound vocalisations (USV) than at other cycle stages. Using the USV test, short-term administration of low-dose FLX (1.75 mg kg−1, i.p.) designed to blunt the sharp fall in brain allopregnanolone concentration during late dioestrus but without affecting 5-HT systems, prevented the increase in isolation stress-evoked USVs. Conclusions: The light switch-off and isolation restraint-induced USV tests evoke unconditioned adverse emotional responses that are ethologically relevant and sensitive to oestrous cycle stage. The USV test fulfils many criteria required of a model for premenstrual syndrome in women. Using the USV test, short-term administration of FLX to increase brain allopregnanolone concentration without affecting 5-HT systems prevented the increased USV responding in late dioestrus. Short-term low-dose FLX treatment may have potential to alleviate development of adverse premenstrual symptoms in women.
Clinical Trial Recruitment and Retention of College Students with Type 1 Diabetes via Social Media: An Implementation Case Study
Authors: Wisk Lauren E. , Nelson Eliza B. , Magane Kara M. , Weitzman Elissa R. 
Published: April 2019

Background: We sought to quantify the efficiency and acceptability of Internet-based recruitment for engaging an especially hard-to-reach cohort (college-students with type 1 diabetes, T1D) and to describe the approach used for implementing a health-related trial entirely online using off-the-shelf tools inclusive of participant safety and validity concerns. Method: We recruited youth (ages 17-25 years) with T1D via a variety of social media platforms and other outreach channels. We quantified response rate and participant characteristics across channels with engagement metrics tracked via Google Analytics and participant survey data. We developed decision rules to identify invalid (duplicative/false) records (N = 89) and compared them to valid cases (N = 138). Results: Facebook was the highest yield recruitment source; demographics differed by platform. Invalid records were prevalent; invalid records were more likely to be recruited from Twitter or Instagram and differed from valid cases across most demographics. Valid cases closely resembled characteristics obtained from Google Analytics and from prior data on platform user-base. Retention was high, with complete follow-up for 88.4%. There were no safety concerns and participants reported high acceptability for future recruitment via social media. Conclusions: We demonstrate that recruitment of college students with T1D into a longitudinal intervention trial via social media is feasible, efficient, acceptable, and yields a sample representative of the user-base from which they were drawn. Given observed differences in characteristics across recruitment channels, recruiting across multiple platforms is recommended to optimize sample diversity. Trial implementation, engagement tracking, and retention are feasible with off-the-shelf tools using preexisting platforms.
Risk Factors for Mortality and Readmission After Shoulder Hemiarthroplasty for Fracture
Authors: Singh Anshuman , Schultzel Mark , Cafri Guy , Yian Edward H , Dillon Mark T , Navarro Ronald A 
Published: April 2019

Background Limited information exists regarding mortality and readmission following proximal humerus fracture. This study examines risk factors following hemiarthroplasty for these fractures. Methods A retrospective analysis of prospectively collected data on 788 patients treated with hemiarthroplasty for acute proximal humerus fracture from January 2005 to December 2011 was conducted. One-year mortality and 30- and 90-day hospital readmission were evaluated. Patient risk factors included age, race, gender, diabetes, American Society of Anesthesiologists (ASA) score, and body mass index. Results One-year mortality rate was 5.2%. Patients with ASA ≥3 had 2.37 times (95% confidence interval [CI]: 1.05–5.32) greater mortality risk versus patients with ASA1/2. The 30-day readmission rate was 8.4% and at 90 days was 12.6%. Females had 0.53 risk of readmission versus males (95% CI: 0.29–0.96). Patients with ASA ≥3 had 1.79 (95% CI: 1.04–3.09) risk of 90-day readmission versus patients with ASA1/2; females had 0.52 (95% CI: 0.31–0.85) risk of readmission versus males. Increased age increased all odds ratios. Conclusions Readmission rate after hemiarthroplasty for proximal humerus fracture is significant both at 30 and 90 days and is higher in males. Age and ASA ≥3 correlate with this. Diabetes and obesity were not significant risk factors for readmission or mortality.
When Private Information Settles the Bill: Money and Privacy in Google’s Market for Smartphone Applications
Authors: Kummer Michael , Schulte Patrick 
Published: April 2019

We shed light on a money-for-privacy trade-off in the market for smartphone applications (“apps”). Developers offer their apps at lower prices in return for greater access to personal information, and consumers choose between low prices and more privacy. We provide evidence for this pattern using data from 300,000 apps obtained from the Google Play Store (formerly Android Market) in 2012 and 2014. Our findings show that the market’s supply and demand sides both consider an app’s ability to collect private information, measured by the apps’s use of privacy-sensitive permissions: (1) cheaper apps use more privacy-sensitive permissions; (2) given price and functionality, demand is lower for apps with sensitive permissions; and (3) the strength of this relationship depends on contextual factors, such as the targeted user group, the app’s previous success, and its category. Our results are robust and consistent across several robustness checks, including the use of panel data, a difference-in-differences analysis, “twin” pairs of apps, and various measures of privacy-sensitivity and app demand. This paper was accepted by Anandhi Bharadwaj, information systems.
Characterization and Provenance of Archaeological Obsidian from Pirozza-Spalmatore, a Site of Neolithic Colonization on the Island of Ustica (Sicily)
Authors: Franco Foresta Martin , Tykot Robert H. 
Published: April 2019

Abstract
This article presents the first archaeometric research carried out so far on a group of obsidian artifacts collected in the promontory of Pirozza-Spalmatore, the site of a Neolithic settlement on the small island of Ustica (Sicily, Italy). The obsidian assemblage, consisting of 28 artifacts, was subjected to optical, typological and geochemical analyses, the latter carried out by means of a portable pXRF, in order to determine their provenance. The results indicate that 89% of the fragments come from geologic obsidian outcrops on the island of Lipari, and 11% from the island of Pantelleria. It is thus ascertained that, during the Neolithic, Ustica used two different sources of obsidian, located 150–250 km away from the site. These obsidian sources were typical of some western Sicily prehistoric villages, while eastern Sicilian villages seem to have imported obsidian exclusively from Lipari. The analyses indicate that all the obsidian artifacts attributed to Lipari come from the geological deposit of Gabellotto, while those attributed to Pantelleria come from the two distinct deposits of Lago di Venere and Balata dei Turchi.
Petroarchaeometric Data on Antiparos Obsidian (Greece) for Provenance Study by SEM-EDS and XRF
Authors: Acquafredda Pasquale , Micheletti Francesca , Muntoni Italo Maria , Pallara Mauro , Tykot Robert H. 
Published: April 2019

Abstract
The island of Antiparos belongs to the Aegean volcanic arc. The obsidian outcrops here contain pieces of excellent tool-making quality, but of small size making the raw material less attractive. Geological samples collected at Soros beach, at Blaco and Mastichi, in the southern part of the island, were analysed using Optical Microscopy, XRF (whole rock) and SEM-EDS (glass and microliths-microphenocrysts). The results obtained demonstrate the potential for distinguishing the Antiparos obsidian from other major central-western Mediterranean sources in an absolutely non-destructive way, using an XRF spectrometer or alternatively with an SEM equipped with an ED spectrometer.
Obsidian from the Bronze Age Village of San Vincenzo, Stromboli, Aeolian Islands: A Preliminary Investigation
Authors: Levi Sara Tiziana , Calliari Diego , Arzarello Marta , Cannavò Valentina , Di Renzoni Andrea , Photos-Jones Effie 
Published: April 2019

Abstract
We present the preliminary results of the ongoing investigation of the obsidian from the Bronze Age village of San Vincenzo, Stromboli, Aeolian Islands, for the purpose of providing technological and typological characterization, and also provenance of the raw material, the latter with non-destructive p-XRF. Regarding provenance, the source of the raw material is likely to be neighbouring Lipari. It was transported to Stromboli and used mostly in a highly opportunistic manner and for the production of blade(let), non-bladelike tools (mainly scrapers) and micro bladelets. The obsidian distribution around the site shows concentration in both domestic and production areas.
The Neolithic Site of San Martino — Sicily: Working and Circulation of Obsidian from Lipari
Authors: Quero Tania , Martinelli Maria Clara , Giordano Letterio 
Published: April 2019

Abstract
The settlement of San Martino was found in 2008 on the Northern coast of Sicily (near the city of Spadafora — Messina). It is located on a hill slope about 4 km from the coast of the Tyrrhenian Sea, near an ancient river which is no longer present today. The stratigraphy included two Neolithic levels: the oldest one belonged to the Stentinello culture (middle Neolithic — 6th-5th millennium BC cal) and the later one belonged to the Diana culture (Late Neolithic — 4th millennium BC cal). The San Martino lithic assemblage consists of a very significant amount of obsidian knapping products that have allowed us to examine the procurement, exploitation and circulation of this raw material, from the source on the island off the coast of Sicily, during the Neolithic period. Considering its strategic location and some analogies with other settlements nearby, the site of San Martino was probably part of the Lipari obsidian networks of exchange.
Geological Sources of Obsidian on Lipari and Artifact Production and Distribution in the Neolithic and Bronze Age Central Mediterranean
Authors: Tykot Robert H. 
Published: April 2019

Abstract
The Aeolian island of Lipari, just north of eastern Sicily, was a major geological source of high quality obsidian that was volcanically formed in the Late Mesolithic, followed by another major production in the 1st millennium AD. A much earlier volcanic event on Lipari also produced some obsidian, but not of sufficient quality for tool production. A detailed geological survey of the Lipari obsidian source areas, including assessments of quantity, quality, accessibility, and visual variation was performed, followed by elemental analyses using INAA, LA-ICP-MS, ED-XRF, and pXRF which show that many different groups may be distinguished from each other. Geochemical analyses of several thousand obsidian artifacts from sites in Sicily and southern Italy reveal that two early Holocene subsources, Gabellotto Gorge and Canneto Dentro, were used during the Neolithic and Bronze Ages.
Obsidian Sourcing and Characterization in the Celebes Region: An Initial Interpretation on the “Celebes Seafaring People”
Authors: Neri Leee Anthony M. 
Published: April 2019

AbstractThe peopling of Island Southeast Asia is told through the Austronesian migration theory. During the Neolithic Period (ca. 6000–5000 BP), the Austronesians entered the Philippines altering the cultural landscape and heralding the beginning of the Neolithic. The Austronesian people continued expanding through Island Southeast Asia, the Pacific, and as far as Madagascar. It is the most influential multiregional archaeological theory in Southeast Asia and the Pacific Region. Although archaeologists, as a whole, generally support this theory, the operations governing the Austronesian migration is still subject to intense debate. Theories suggest that migration is not as straightforward as commonly presented. In spite of their movement towards the Pacific, some Austronesian population stayed in the Celebes area and may have developed a close-knit exchange system with their neighbors powered by sophisticated ancient maritime technology and shared cultural affiliations. This paper calls this maritime network as the “Celebes Seafaring People.” The “Celebes Seafaring People” hypothesis is the first study to focus on a smaller aspect of a much larger theory, allowing a clearer perspective on the early cultures of this Region. Currently, the hypothesis encompasses three island groups: Northern Mindanao, Philippines; Sabah, Malaysia; and Talaud Islands, Indonesia. This is an initial interpretation of the “Celebes Seafaring People” hypothesis through geochemical analysis of obsidian found in the island groups in the Celebes Region. These group of people may have a complex maritime exchange network and share the same cultural affiliation during the Neolithic Period. Further investigation must done to substantiate such theoretical interpretation.
Membrane-based separation technologies: from polymeric materials to novel process: an outlook from China
Authors: Jiang Zhongyi , Chu Liangyin , Wu Xuemei , Wang Zhi , Jiang Xiaobin , Ju Xiaojie , Ruan Xuehua , He Gaohong 
Published: April 2019

Abstract
During the past two decades, research on membrane and membrane-based separation process has developed rapidly in water treatment, gas separation, biomedicine, biotechnology, chemical manufacturing and separation process integration. In China, remarkable progresses on membrane preparation, process development and industrial application have been made with the burgeoning of the domestic economy. This review highlights the recent development of advanced membranes in China, such as smart membranes for molecular-recognizable separation, ion exchange membrane for chemical productions, antifouling membrane for liquid separation, high-performance gas separation membranes and the high-efficiency hybrid membrane separation process design, etc. Additionally, the applications of advanced membranes, relevant devices and process design strategy in chemical engineering related fields are discussed in detail. Finally, perspectives on the future research directions, key challenges and issues in membrane separation are concluded.
A comparative Study of Psychological Characteristics of Teachers in Riga and Smolensk
Authors: Vladimirovna Bogdanova Tatiana , Ermolaeva Elena 
Published: April 2019

Abstract
The paper presents results of research on priority values in teaching process, the psycho-emotional state, self-evaluation, style of teaching and the level of subjective control of contemporary Russian and Latvian schoolteachers. According to Rezapkina (Резапкина, 1999), these five categories form the psychological portrait of a teacher. The authors analyse and compare the numerical representations of these characteristics, their variations and correlations for the three groups of teachers of both countries, which differ by length of service. An attempt was made to identify some negative trends in professional identity of schoolteachers, which are common to the professional communities of Latvia and Russia.
Neuroscience: A Traditional and Innovative Approach to Education with Focus on Stress with Learning
Authors: Schachl Hans 
Published: April 2019

Abstract
Learning must be brain-based. This topic would include contents like perception, attention and memory. But here the focus is on ‘stress’ in the context of the role of emotions on learning. Cognition and emotions are not separated in the brain, but they work together. Stress is a survival programme, but has some negative effects on learning. A specific part of the brain, the hippocampus, is very vulnerable. The consequences are that anxiety and stress must be reduced, and we must learn to cope with stress. For coping, a combination of instrumental, mental and regenerative management of stress is recommended. An intensive focus should be given to physical exercise: it has positive impacts not only on health, but also on cognitive learning as well. The neuroscientific approach confirms old pedagogic principles.
Children with Special Educational Needs and Their Inclusion in the Educational System: Pedagogical and Psychological Aspects
Authors: Kauliņa Anda , Voita Daina , Trubina Irēna , Voits Toms 
Published: April 2019

Abstract
One of the measures of the quality of education system is equal access to the education opportunity to enable learning for everyone. In the recent years, multiple conventions, declarations, announcements and resolutions regarding inclusive education have been approved internationally and included in the Latvian law of education. Nevertheless, even with the abundant amount of data and previous research results, the introduction and provision of inclusive education in practice has been controversial. The main focus has been placed on child inclusion within the educational system, but support for teachers and parents or legal guardians has not always been sufficient. For inclusive education to be truly successful, all involved parties should be receiving adequate support. Aim of the present study: analysis and evaluation of the present state of inclusive education framework and its success within the Latvian educational system. Materials and methods: literature review, survey. Conclusions: Inclusion of children with special educational needs in the inclusive education framework is a complicated pedagogical and psychological process requiring a specific attitude and preparedness of the education professionals, school staff, parents, children and society as a whole.
Opinion of Teachers and Directors About Implementation and Using of Information and Communication Technologies in Schools of Latvia
Authors: Porozovs Juris , Migleniece Anita , Voita Daina , Voits Toms , Valdemiers Alvis 
Published: April 2019

Abstract
Modern education is closely connected with implementation and use of information and communication technologies (ICT) in the teaching process. ICT is recommended to be used in schools in Europe to develop competences of students to become high-quality professionals and active citizens in the society. A questionnaire survey of teachers and directors of Latvian schools was carried out in order to evaluate the use of ICT in Latvian schools and attitude of teaching staff towards this process. The results of the questionnaire survey showed that Latvian schools are not supplied with ICT to a satisfactory level. It is necessary to raise the competence of many teachers in the field of ICT. The attitude of teachers to the use of ICT in the study process is more positive in comparison with school directors. Important factors for improvement of ICT use in schools are ICT training for teachers, computer accessibility for teaching staff, sufficient supply of qualitative ICT teaching materials and computers in schools and encouragement of teachers to use ICT.
Theoretical and Practical Study of the Concept of Social and Emotional Health by Michael J. Furlong Applied to the Selection of Teenagers and Youth
Authors: Timofejeva Tatjana , Svence Guna , Petrulite Ala 
Published: April 2019

Abstract
Based on the analysis of scientific research, it has been concluded that the methodology ‘Social Emotional Health Survey - Secondary’ (SEHS-S) with meta-construct of covitality is a universal tool in order to define the social and emotional health of teenagers and young people; it has also been found that the meta-construct of covitality is essentially related to other psychological constructs, such as emotional intelligence, vitality, social competence and mental health. In the research that was conducted in Riga Teacher Training and Educational Management Academy (Timofejeva, 2015), the method of M.J. Furlong has been adapted to the Russian language, Latvian language interpretation of the notion of covitality has been proposed offering terms ‘Sociāli emocionālās veselības faktors’ or SEV (social and emotional health factor) or ‘sinerģiskā vitalitāte’ (‘synergic vitality’). Furthermore, a theoretically constructive model of the author has been created. Within this model, a new correlation has been hypothetically predicted between meta-construct of covitality (SEV-factor) and other scientifically acknowledged psycho-social constructs and notions: psycho-social prerequisites of the SEV factor and psychological options that depend on the level of the SEV factor. During the research, a selection of several teenagers and young people - students of comprehensive schools of Riga - with Russian as their native language was made (n=184). It was found that the applied methodology is valid for the selection of Russian-speaking teenagers/youth of Latvia and that it can be recommended to the psychologists of schools as a new psychometric tool for their professionally practical duties. The data obtained within the research is planned to be used for comparisons with a similar research conducted in Lithuania (Lithuanian University of Educational Sciences), led by doc. A. Petrulytė.