bluuebunny/crossref_metadata_2025_split huggingface dataset:
The phosphoinositide phosphatase Sac1 regulates cell shape and microtubule stability in the developing Drosophila eye
Authors: Del Bel Lauren M. , Griffiths Nigel , Wilk Ronit , Wei Ho-Chun , Blagoveshchenskaya Anastasia , Burgess Jason , Polevoy Gordon , Price James V. , Mayinger Peter , Brill Julie A. 
Published: May 2018

ABSTRACT
Epithelial patterning in the developing Drosophila melanogaster eye requires the Neph1 homolog Roughest (Rst), an immunoglobulin family cell surface adhesion molecule expressed in interommatidial cells (IOCs). Here, using a novel temperature-sensitive (ts) allele, we show that the phosphoinositide phosphatase Sac1 is also required for IOC patterning. Sac1ts mutants have rough eyes and retinal patterning defects that resemble rst mutants. Sac1ts retinas exhibit elevated levels of phosphatidylinositol 4-phosphate (PI4P), consistent with the role of Sac1 as a PI4P phosphatase. Indeed, genetic rescue and interaction experiments reveal that restriction of PI4P levels by Sac1 is crucial for normal eye development. Rst is delivered to the cell surface in Sac1ts mutants. However, Sac1ts mutant IOCs exhibit severe defects in microtubule organization, associated with accumulation of Rst and the exocyst subunit Sec8 in enlarged intracellular vesicles upon cold fixation ex vivo. Together, our data reveal a novel requirement for Sac1 in promoting microtubule stability and suggest that Rst trafficking occurs in a microtubule- and exocyst-dependent manner.
Physical Activity Levels Predict Exercise-induced Hypoalgesia in Older Adults
Authors: OHLMAN THOMAS , MILLER LEAH , NAUGLE KEITH E. , NAUGLE KELLY M. 
Published: May 2018

ABSTRACT
Prior research indicates that older adults exhibit a deficient capacity to activate multiple pain inhibitory mechanisms, including pain inhibition after acute exercise termed exercise-induced hypoalgesia (EIH). The influence of physical activity levels and psychological processes on EIH in older adults remains unclear.

Purpose
This study examined potential psychological and physical activity predictors of the magnitude of EIH after submaximal isometric exercise in healthy older adult men and women.

Methods
Fifty-two healthy older adults completed a test of EIH, the Pain Catastrophizing Scale, the Tampa Scale of Kinesiophobia, and wore an accelerometer on the hip for 1 wk to assess physical activity levels. For the test of EIH, participants complete a 3-min isometric handgrip at 25% of maximum voluntary contraction. Pressure pain thresholds (PPT) and a 30-s continuous heat pain test were completed before and immediately after the exercise.

Results
Mixed-model ANOVA revealed that older adults demonstrated significantly decreased PPT after isometric exercise (P = 0.030), and no changes on the heat pain trials from pretest to posttest (P > 0.05). A multiple regression revealed that accumulated moderate to vigorous physical activity (MVPA) per week significantly predicted the change in PPT after exercise (β = 0.35, P = 0.012). Participants who averaged greater MVPA experienced a greater increase in PPT after exercise. No relationships were found with EIH and the psychological variables.

Conclusions
Older adults did not exhibit EIH after submaximal isometric exercise. However, those who did more MVPA per week experienced a greater magnitude of pain inhibition after acute exercise.
When Prospect Theory Meets Consumer Choice Models: Assortment and Pricing Management with Reference Prices
Authors: Wang Ruxian 
Published: May 2018

Problem definition: Reference prices arise as price expectations against which consumers evaluate products in their purchase scenarios. We investigate what will happen when prospect theory (e.g., reference prices) meets consumer choice models from the perspectives of both the consumers and the firm. Academic/practical relevance: Consumers see multiple relevant products on a particular purchase occasion and often compare their prices to form the willingness to pay when considering whether to purchase a particular product. Reference prices, which are not included in many choice models, may impact consumer choice behavior, so we incorporate reference prices into consumer choice models and investigate the operations management problems. Methodology: We take the widely used multinomial logit model as a showcase to examine the effects of reference prices through analytical and empirical study. We consider the optimization problems on assortment planning and pricing under consumer choice models with a variety of reference prices, including the lowest price and the assortment variety. Results: Our empirical study on a real data set demonstrates that incorporating reference prices into choice models can significantly improve goodness of fit and prediction accuracy of consumer choice behavior. Moreover, we characterize the optimal policies for the assortment planning and pricing problems under the consumer choice models with various reference prices. In particular, for the pricing problems under the reference prices defined by either the lowest price or assortment variety, we show that the optimal pricing policy has the following structure: products can be divided into several groups based on their costs; the products in the same group charge either the same markup or the same price. Managerial implications: In practice, reference prices should be taken into account in model estimation and operations management. Ignoring reference prices may lead to substantial losses. The online appendix is available at https://doi.org/10.1287/msom.2017.0688 .
Technical Note—An Expectation-Maximization Algorithm to Estimate the Parameters of the Markov Chain Choice Model
Authors: Şimşek A. Serdar , Topaloglu Huseyin 
Published: May 2018

We develop an expectation-maximization algorithm to estimate the parameters of the Markov chain choice model. In this choice model, a customer arrives into the system to purchase a certain product. If this product is available for purchase, then the customer purchases it. Otherwise, the customer transitions between the products according to a transition probability matrix until she reaches an available one and purchases this product. The parameters of the Markov chain choice model are the probability that the customer arrives into the system to purchase each one of the products and the entries of the transition probability matrix. In our expectation-maximization algorithm, we treat the path that a customer follows in the Markov chain as the missing piece of the data. Conditional on the final purchase decision of a customer, we show how to compute the probability that the customer arrives into the system to purchase a certain product and the expected number of times that the customer transitions from a certain product to another one. These results allow us to execute the expectation step of our algorithm. Also, we show how to solve the optimization problem that appears in the maximization step of our algorithm. Our computational experiments show that the Markov chain choice model, coupled with our expectation-maximization algorithm, can yield better predictions of customer choice behavior when compared with other commonly used alternatives.The online appendix is available at https://doi.org/10.1287/opre.2017.1692 .
Tasks Interrupted: How Anticipating Time Pressure on Resumption of an Interrupted Task Causes Attention Residue and Low Performance on Interrupting Tasks and How a “Ready-to-Resume” Plan Mitigates the Effects
Authors: Leroy Sophie , Glomb Theresa M. 
Published: May 2018

This paper explores the attention regulation challenges brought by interruptions. In contrast to much of the research on interruptions that looks at the effects on the interrupted task, this paper examines the difficulty of focusing attention and performing well on interrupting tasks. Integrating research on attention residue, time pressure, and implementation intention, we predict that when people anticipate resuming their interrupted work under time pressure, they will find it difficult to switch their attention to the interrupting task, leading to attention residue and low performance. A ready-to-resume intervention, in which one briefly reflects on and plans one’s return to the interrupted task, mitigates this effect such that attention residue is reduced and performance on the interrupting task does not suffer. Data collected across four studies support these hypotheses. The e-companion is available at https://doi.org/10.1287/orsc.2017.1184 .
developing children’s reasoning and inquiry, concept analysis, and meaningmaking skills through the community of inquiry
Authors: Canuto Abigail Thea 
Published: May 2018

This paper presents the results of a research done to investigate the effectiveness of Philosophy for Children (P4C), a pedagogy employing philosophical dialogue in a community of inquiry, in a Philippine primary school. Quantitative analysis of critical thinking skills identified by Sharp and Splitter (1995) as (1) reasoning; (2) concept analysis; and (3) meaning-making revealed that there was a considerable increase in the frequency of the children’s use of such critical thinking skills over the course of fifteen (15) sessions of dialogical inquiry. Moreover, qualitative analysis of excerpts from the dialogue transcripts accounted for the refinement of the children’s use of the critical thinking skills. This pioneering work thus calls for further research that will implement P4C in other grade levels and to explore other indicators of development in children’s thinking. Further, it recommends that primary schools adopt P4C in Philippine basic education curriculum and that teacher education institutions provide teacher training and include P4C for pre-service training.
fare filosofia con i bambini. un percorso utopico da Socrate ad Hannah Arendt
Authors: Iiritano Massimo 
Published: May 2018

The analysis of Hannah Arendt's Socrate opens up the possibility of a fruitful rethinking of the sense and way of conceiving philosophy with children. A way that in this proposal is defined as "Utopian", since it intends to resume, with the Socratic lesson, just how much remains in it open, undetermined, capable of reviving with enchantment in the living of the orality of a philosophical dialogue- absolutely unprecedented and unpredictable - such as that with children. The space given to the unexpected, to listening, to free divergence, then becomes radical, comes to be a paradoxical foundation of a "methodology" that cannot be captured in structured schemes and paths, since it remains open to the "utopian" space of philosophizing. The comparison with Arendt is therefore interleaved, through references to other readings that are contemporary of the Socratic lesson, with the experience lived of the author, who has been leading for years philosophy workshops with primary school children. Of course, Socrates has never been and never wanted to act as a "master": his conducting the dialogue, although always being asymmetric, is aimed at bringing the interlocutor on his line of reasoning and never the opposite (obvious and almost paradoxical in Plato), has never had as end the teaching of some doctrine. How much, rather, to lead the interlocutor from the presumed certainty to radical uncertainty, from opinion to doubt, from affirmation to aporia. Thiswe must authentically experiment, before anything else, when we place ourselves inlistening to children's questions, when we try to dialogue with them, to "do philosophy", to "think together".
o círculo mágico e a arte de deixar-se repetir na infância: exercitação e aprendizagem nas esferas
Authors: Freitas Alexandre Simão 
Published: May 2018

Modern anxiety about human formation has been articulated around crucial questions for exercises, behaviors, routines, habits that are triggered to give children a certain shape, modeling the future of infans through repeated and regulated activities, at the same time in which the autoplastic forces that interact in the configuration of all life are tame. Not coincidentally, Peter Sloterdijk apprehends modernity as a form of secularization and collectivization of the life of the exercise, displacing the asceses transmitted from Antiquity from its respective spiritual contexts and dissolving them in the foamy fluid of the present biopolitical communities dedicated to the training and the industralism of the subjectivity. Based on his asceticism, it is possible to see how childhood education is at the center of a long historical chain of training through an art driven by immunological procedures and selective antropotechnique turned to the production of innumerable childhood farewells that aim to wrest the subject from their communities insuflated, hardening them and manufacturing them as "state athletes" or "domestic enterprises". In this direction, this essay intends to explore from the spherological drama described by Sloterdijk, which means to think of childhood when one has to pay the price for the absence of protective layers, that is, when the magic circles explode, the bubbles of soap blown by the eyes the child.
Infância, imagem e formação docente: Entre experiências, saberes e poderes na Educação Infantil.
Authors: Leite César Donizetti , Camargo Andréia Regina de oliveira 
Published: May 2018

The reflections around teacher training and the means by which it is treated in the educational contexts have major importance, due to the urgency of the topic as well as the multiplicity of ways to be dealt along with the teachers. From researches of images production, developed with children and teachers in the ambit of early childhood education, this text will reflect on the formative processes of teachers in the childhood education. In this context, there are a few relevant questions: what can the image do in the formative processes? In which ways may the teacher training help us to think about the childhood and the educational practices with little children? By which means may the childhood help us to think the work of teacher training. In this way, using the produced images, this text aims to operate in the circulation movement of the thought itself, in which the thought can, in its exteriority, experiment with words (language), childhood, image and teacher training, enabling ruptures to think about the child, the educators, the school, the knowledge, the doing, the powers, the action protocols, what to do with the children and how to deal with them, composing possibilities that overflow what is determined and legalized. As theoretical basis, we take authors such as G. Agamben, G. Deleuze e Michel Foucault.
Thiourea-Induced Change of Structure and Color of Brick-Red Palygorskite
Authors: Zhang Zhi F. , Wang Wen B. , Mu B. , Wang Ai Q. 
Published: May 2018

AbstractBrick-red deposits with palygorskite (Pal) as the main ingredient are widely distributed in nature, but these have not been deployed at a large scale in industry because of their inherent deep colors. In the present study, the brick-red Pal deposit was treated hydrothermally in various reaction media including water, a urea solution, and a thiourea solution. The effects of these processes on the structure, physicochemical features, and color of Pal were studied intensively to understand the structure and composition of the brick-red Pal deposit and to lay a theoretical foundation for the extension of its industrial application. The changes in structural features after hydrothermal treatment were studied by Fourier-transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, magic-angle spinning nuclear magnetic resonance, and Mössbauer spectroscopy techniques. The results indicated that the color of brick-red Pal did not change after hydrothermal treatment in water or in a urea solution, and the color changed to gray-white after treatment in the thiourea solution. The rod-like crystal morphology of Pal was retained throughout the experiments and no significant change in the main associated minerals, including feldspar, muscovite, and quartz, was observed after hydrothermal treatment. The dissolution of associated hematite (α-Fe2O3 and the reduction of Fe(III) species are the main reason for the change of Pal from brick-red to gray-white.
Queer Life-Worlds in Postsocialist Armenia: Alternativ Space and the Possibilities of In/Visibility
Authors: Shirinian Tamar 
Published: May 2018

Abstract
Based on fifteen months of ethnographic research conducted between 2010 and 2013, this article explores queer life-worlds through the Armenian notion of alternativ space, spaces that create possibilities for practices, desires, ways of looking, and being that differ from Armenian national values of propriety. Political-economic reform has created anxieties regarding national propriety and the family’s ability to exist in continuity with a moral past within postsocialist time-space. Intense anxieties regarding the proper social reproduction of national propriety make visible forms of difference from what is considered proper difficult. As such, in/visible spaces in which these differences can be exhibited have emerged, merging nonnormative sexual and gendered worlds with wider experiences of alterity that disturb the nation’s social reproduction and continuity with the past. Although alternativ spaces make difference possible, they also reproduce the nation’s norms by containing that difference in interior queer life-worlds. I suggest, however, that these spaces also have the potential of redefining Armenianness as they bring alterity into the larger space of nation, queering Armenian futurity in ways that LGBT visibility would not make possible.
Bivariate analysis of the genetic variability among some accessions of African Yam Bean (Sphenostylis stenocarpa (Hochst ex A. Rich)Harms)
Authors: AKINYOSOYE Solomon Tayo , ADETUMBI Johnson Adedayo , AMUSA Oluwafemi Daniel , AGBELEYE Adeola , ANJORIN Folake , OLOWOLAFE Mercy Oluremi , OMODELE Taiwo 
Published: May 2018

Variability is an important factor to consider in crop improvement programmes. This study was conducted in two years to assess genetic variability and determine relationship between seed yield, its components and tuber production characters among twelve accessions of African yam bean. Data collected were subjected to combined analysis of variance (ANOVA), Principal Component Analysis (PCA), hierarchical and K-means clustering analyses. Results obtained revealed that genotype by year (G × Y) interaction had significant effects on some of variables measured (days to first flowering, days to 50 % flowering, number of pod per plant, pod length, seed yield and tuber yield per plant) in this study.The first five principal components (PC) with Eigen values greater than 1.0 accounted for about 66.70 % of the total variation, where PC1 and PC 2 accounted for 39.48 % of variation and were associated with seed and tuber yield variables. Three heterotic groups were clearly delineated among genotypes with accessions AY03 and AY10 identified for high seed yield and tuber yield respectively. Non-significant relationship that existed between tuber and seed yield per plant of these accessions was recommended for further test in various agro-ecologies for their suitability, adaptability and possible exploitation of heterosis to further improve the accessions.
Protective effects of polyamines on regulation of senescence in spray carnation cut flowers (Dianthus caryophyllus’Spotlight’)
Authors: KARIMI Mahnaz , AKBARI Fateme , HEIDARZADE Ayoub 
Published: May 2018

This study was conducted to evaluate the effect of three polyamines (PAs) on antioxidants capacity, free radical scavenging and vase life improvement of spray carnation cut flowers. Hence, the cut flowers were dipped in different concentrations (0, 1, 2 and 3 mmol) of putrescine (Put), spermidine (Spd) and spermine (Spm) for 24 h. After treatment, the cut flowers were placed in distilled water and kept at 20 °C ± 2 °C, 70-80 % RH. All concentrations of Put treatment improved the vase life of cut spray carnation flowers as compared to control. The highest positive influence on vase life (with 13 days) was related to 2 mmol Put treatments. Result showed that applying Put and Spm treatments at 1 or 2 mmol concentration significantly minimized the percentage of mass loss compared to the control. A significant inhibition of anthocyanin degradation was observed with Put 1 or 2 mmol and Spm 1 mmol Significantly higher activities of catalase and DPPH radical scavenging activity were observed in petals when cut carnations were treated with 1 mmol Put. It can be concluded that application of polyamines such as putrescine can play a key role to prevent or delay deterioration in cut flowers.
Genetic diversity within and among two-spotted spider mite resistant and susceptible common bean genotypes
Authors: YOUSEFI Zeinab , TAHMASEBI Zahra , MOGHADAM Mohammad Javad Erfani , ARMINIAN Ali 
Published: May 2018

Two-spotted spider mite (Tetranychus urticae C. L. Koch, 1836), is one of the most destructive herbivores of common bean. Very little is known about the diversity among resistant sources in this crop. The present study was conducted to characterize 22 resistant and susceptible common bean genotypes by 8 Simple Sequence Repeats (SSRs) and 8 Random Amplified Polymorphic DNA (RAPD) markers. These SSR and RAPD primers produced 100 % and 81.8 % polymorphic bands. Based on RAPD fingerprints and SSR profiles, pairwise genetic similarity ranged from 0.0 to 0.857 and from 0.125 to 1, respectively. The resistant and susceptible common bean accessions were grouped together in the dendrograms generated from RAPD and SSR clustering analyses. The results indicate that RAPD and SSR analysis could be successfully used for the estimation of genetic diversity among genotypes. SSR markers could group genotypes according to their resistibility and susceptibility to the spotted spider mite but RAPD could not. Therefore, the SSR markers can facilitate the development of resistant common bean cultivars through breeding programs against T. urticae.
Yield response and economic implications of soybean (Glycine max (L.). Merrill) – lowland-upland rice sequential cropping in the rainforest/savanna transitory ecosystem
Authors: SOREMI Paul Abayomi Sobowale , SAKARIYAWO Olalekan Sulaimon , OKELEYE Kehinde Adebayo , OLOWE Victor Idowu O. , AZEEZ Jamiu Oladipupo , NWILENE Francis , ADERIBIGBE Sunday Gbenga 
Published: May 2018

A sequential cropping system of soybean-lowland (NERICA L-42)-upland (NERICA 2) rice was established at Abeokuta and Ibadan (Nigeria) to evaluate the performance of the cropping system. Field trials were in split-split plot arrangement fitted into randomised complete block design and replicated three times. The first sequence had in the main plot tillage [minimum (MT) and conventional (CT)]. Soybean varieties TGx 1448-2E (V1) and TGx 1740-2F (V2) in sub-plot and spacing in sub-sub plot were 60 cm × 5 cm (R1), 60 cm × 10 (R2) and 60 cm × 15 cm (R3). Individual rice plots were established by dry dibble (DD) seeding and transplanting and sub-sub plot spacing were 15 cm × 15 cm (S1), 20 cm × 20 and 25 cm (S2) × 25 cm (S3). The sequence soybean (V1 CT R3); lowland and upland rice (S3 CT DD) was the most economically efficient (N 1,754 ha-1 day-1) in Abeokuta, while soybean (V1 MT R1) and lowland and upland rice (S1 DD MT) was the most economically efficient (N 1,858 ha-1 day-1) in Ibadan.