Principal Efficacy: Implications for Rural \u27Grow Your Own\u27 Leadership Programs

Although grow your own principal preparation programs have become a popular method for recruiting and selecting administrator candidates for hard to fill positions in both urban and rural schools, “grow your own” prinicpal candidates in rural contexts may be more vulnerable to the phenomenon of loss of self-efficacy. This study suggests that conditions related to candidate recruitment, social isolation, changing relationships with former colleagues, and lack of mentoring support can negatively affect aspiring principals’ beliefs and ultimately actions in leading rural schools. This study examines the loss of self-efficacy phenomenon, and suggests how university /school district partnerships might work to develop effective recruitment, support, and mentoring practices for rural \u27grow your own\u27 candidates

Mobile Marketing: Applications And Implications For Physicians In Private Practice

The rapid proliferation of mobile technologies and mobile devices has resulted in an increase in the importance of mobile marketing and has captured the interest of academic researchers from a wide variety of disciplines. Due to its unique characteristics, mobile marketing is playing an increasingly significant role in marketing communication and Customer Relationship Management (CRM) efforts of organizations in various industries and professions. As mobile technologies and applications continue to evolve, the resulting opportunities for their increased use in the health care sector at large, and within specific sectors in the industry, are poised to increase significantly in coming years. Specifically, this paper explores the primary applications and implications of mobile marketing for physicians in private practice. Some of the key questions and challenges associated with the integration of mobile technologies by physicians in private practice are investigated and suggestions are made for future research directions

Predicción de la frescura del aceite de oliva virgen extra durante el almacenamiento mediante espectroscopía de fluorescencia

Virgin olive oil quality relates to flavor and unique health benefits. Some of these properties are at the most desirable level when the oil is just extracted, since it is not a product that improves with age. On the contrary, the concentrations of many compounds change during its shelf-life. These changes reveal the aging of the oil but do not necessarily mean decay in sensory properties, so in some cases an aged oil from healthy olives may be better qualified than a fresh one from olives affected by fermentation. The aim of this work is to analyze different methodologies proposed for assessing the quality of virgin olive oil with implications in freshness and aging of the oil, and to highlight the possibilities of rapid spectrofluorimetric techniques for assessing oil freshness by checking the evolution of pigments during storage. The observed change in the selected spectral features and mathematical modelling over time was compared with the accepted model for predicting the amount of pyropheophytin a, which is based on isokinetic studies. The best regression was obtained for 655 nm (adjustedR2 = 0.91) wavelength, which matches the distinctive band of pigments. The two mathematical models described in this study highlight the usefulness of pigments in the prediction of the shelf-life of extra virgin olive oil.La calidad del aceite de oliva virgen está relacionada con su flavor y sus beneficios únicos para la salud. Algunas de estas propiedades se encuentran en el nivel más deseable cuando el aceite está recién extraído, ya que no es un producto que mejore con el tiempo. Por el contrario, las concentraciones de muchos compuestos cambian a lo largo de la vida útil. Estos cambios revelan el envejecimiento del aceite, pero no implican necesariamente la alteración de las propiedades sensoriales, por lo que en algunos casos un aceite envejecido procedente de aceitunas sanas puede presentar mejor calidad que uno fresco procedente de aceitunas afectadas por procesos de fermentación. El objetivo de este trabajo es estudiar diferentes metodologías propuestas para evaluar la calidad del aceite de oliva virgen con implicaciones en la frescura y el envejecimiento del aceite, destacando las posibilidades de las rápidas técnicas espectrofluorométricas para evaluar la frescura del aceite verificando la evolución de los pigmentos durante el almacenamiento. El cambio observado en las características espectrales seleccionadas y su modelado matemático a lo largo del tiempo se comparó con el modelo aceptado para predecir la cantidad de pirofeofitina a, que se basa en estudios isocinéticos. Los dos modelos matemáticos descritos en este estudio pusieron de manifiesto la utilidad de los pigmentos en la predicción de la vida útil del aceite de oliva virgen extra. La mejor regresión se obtuvo para 655 nm (R2 -ajustado = 0,91), longitud de onda que coincide con la banda distintiva de pigmentos.Secretaría de Estado de Investigación, Desarrollo e Innovación de España-AGL2015-69320-

Predicción de la frescura del aceite de oliva virgen extra durante el almacenamiento mediante espectroscopía de fluorescencia

Virgin olive oil quality relates to flavor and unique health benefits. Some of these properties are at the most desirable level when the oil is just extracted, since it is not a product that improves with age. On the contrary, the concentrations of many compounds change during its shelf-life. These changes reveal the aging of the oil but do not necessarily mean decay in sensory properties, so in some cases an aged oil from healthy olives may be better qualified than a fresh one from olives affected by fermentation. The aim of this work is to analyze different methodologies proposed for assessing the quality of virgin olive oil with implications in freshness and aging of the oil, and to highlight the possibilities of rapid spectrofluorimetric techniques for assessing oil freshness by checking the evolution of pigments during storage. The observed change in the selected spectral features and mathematical modelling over time was compared with the accepted model for predicting the amount of pyropheophytin a, which is based on isokinetic studies. The best regression was obtained for 655 nm (adjustedR2 = 0.91) wavelength, which matches the distinctive band of pigments. The two mathematical models described in this study highlight the usefulness of pigments in the prediction of the shelf-life of extra virgin olive oil.La calidad del aceite de oliva virgen está relacionada con su flavor y sus beneficios únicos para la salud. Algunas de estas propiedades se encuentran en el nivel más deseable cuando el aceite está recién extraído, ya que no es un producto que mejore con el tiempo. Por el contrario, las concentraciones de muchos compuestos cambian a lo largo de la vida útil. Estos cambios revelan el envejecimiento del aceite, pero no implican necesariamente la alteración de las propiedades sensoriales, por lo que en algunos casos un aceite envejecido procedente de aceitunas sanas puede presentar mejor calidad que uno fresco procedente de aceitunas afectadas por procesos de fermentación. El objetivo de este trabajo es estudiar diferentes metodologías propuestas para evaluar la calidad del aceite de oliva virgen con implicaciones en la frescura y el envejecimiento del aceite, destacando las posibilidades de las rápidas técnicas espectrofluorométricas para evaluar la frescura del aceite verificando la evolución de los pigmentos durante el almacenamiento. El cambio observado en las características espectrales seleccionadas y su modelado matemático a lo largo del tiempo se comparó con el modelo aceptado para predecir la cantidad de pirofeofitina a, que se basa en estudios isocinéticos. Los dos modelos matemáticos descritos en este estudio pusieron de manifiesto la utilidad de los pigmentos en la predicción de la vida útil del aceite de oliva virgen extra. La mejor regresión se obtuvo para 655 nm (R2 -ajustado = 0,91), longitud de onda que coincide con la banda distintiva de pigmentos.Secretaría de Estado de Investigación, Desarrollo e Innovación de España-AGL2015-69320-

Arenitic deposits of Mesones Unity (Lower Cambrian) in the Eastern Iberian Chain Petrographical analysis and material provenance

[Resumen] El Cámbrico inferior de la Unidad de Mesones, de características esencialmente detríticas, reúne unas especiales condiciones para su estudio petrográfico. A través de él se puede concluir que la Fm. Bámbola tiene una composici6n promedio de grauwacas cuárclcas, depositadas en un medio poco profundo de elevada energía; los depósitos de que la Fm. Embid, con una composici6n grauwáquico feldespática, corresponden a un medio de depósito más distal; por último, los materiales de la Fm. Jal6n, con depósitos detríticos de composición grauwáquico feldespática que alternan con niveles estromatolíticos de dolomías férricas, representan el depósito en un medio más somero pero de reducida energía. La secuencia diagenética de transformación de los depósitos primarios sigue una pauta similar en las tres formaciones: una cementaci6n temprana de cuarzo sintaxial asociada a formación de películas arcillosas y ferruginosas, se prosigue con una cementaci6n posterior de carbonatos, cementos silíceos y rellenos de matriz. Los procesos diagenéticos tardíos comprenden fenómenos de recristalización y autigénesis de micas (cloritas en los tramos superiores), autigénesis de piritas (especialmente en las Formaciones Embid yJalón) y fenómenos de silicificación, generalmente asociados a fenómenos tectónicos. Muy puntualmente se aprecian autigénesis de feldespatos y turmalinas. La aplicaci6n del análisis modal de componentes primarios, según las ideas de DICKINSON (1985), permite clasificar el área fuente de estos materiales como de cratón estable, correspondiente a una plataforma pasiva con oscilaciones eustáticas[Abstract] Lower Cambrian materials of Mesones Unity, mainly of detrital characters, show suitable conditions for its petrographical analysis. This study indicates that Bambola Formation presents average composition of quartzitic graywackes, related to shallow, high-energy environment; Embid Formation materials, constituted by detrital deposits of feldespatic-graywakic composition alternating with stromatolitic ferroan-dolomitic levels, are related to shallow, low-energy environment. Diagenetic transformations of primary deposits show similar trends in the three formations. Early sintaxial quartz overgrowths, associated to pelicular argillitic- ferruginous cements, are followed by carbonatic, silicic, cementation processes and matrix infilling. Later diagenetic stages are represented by recristallization, mica (of chloritic type in the upper sections) or pyrite authigenesis (mainly in Embid and jalón Formations) and silicification phenomena (related to tectonic activity). Feldspar and tourmaline authigenesis are locally observed. Primary components modal analysis following DICKINSON (1985) concepts, allow to classify the source area of these materials as belonging to a stable craton zone constituted by a passive platform with eustatic oscillations

Expression of leptin and adiponectin in the rat oviduct

SUMMARY In mammals, the oviduct is an important source of factors that play key roles in reproductive and developmental events. The major components of oviduct fluid are oviductspecific glycoproteins, but other proteins are synthesized and secreted by the oviduct epithelium. Leptin and adiponectin are two hormones originally identified in adipocytes that play a critical role not only in the control of energy balance and metabolism but also in diverse functions such as reproduction. This study investigates the presence and distribution of leptin and adiponectin in the rat oviduct through a combination of immunohistochemistry and reverse transcription–polymerase chain reaction techniques. Using both techniques, it has been detected that the oviduct of cycling rats expresses leptin and adiponectin. Immunoreactivity for both adipokines appears in the apical region of the secretory epithelial cells, only in the isthmus and ampulla. The immunostain is stronger in the isthmus and changes throughout the estrous cycle in the ampulla, increasing from proestrous to estrous. The results presented here are a further contribution to the identification of leptin and adiponectin produced and secreted by the oviduct epithelium, which must be taken into account for a better understanding of the reproductive events that take place in this organ

Studi Kasus Peserta Didik yang Memiliki Konsep Diri Negatif di SMA Santo Fransiskus Asisi

This study aims to help solve the case of learners who have negative self-concepts in class XI IPS3 SMA Santo Fransiskus Asisi. Subjects cases this research were two people. The research method is descriptive form of a case study. The technique of collecting data using interviews, observation, and home visits. Data collector interview guidelines and observation guidelines. The results of the study subjects many cases I do not talk in class, do not follow school activities, like to do activities alone, insecure and troubled expression. Factors that cause always teased by classmates because of body fat, not to mention the letter "R", and can not express his feelings. Characteristics II taciturn case subjects in class, do not follow school activities, quickly surrendered, insecure and troubled expression. Factors causing not understand him as a whole so that the subject of the case inferior to the situation, and considers classmates did not like it. Help for case subjects I and II are rational emotive therapy, and behavioral counseling

Familias de curvas elípticas adecuadas para Criptografía Basada en la Identidad

La Criptografía Basada en la Identidad hace uso de curvas elípticas que satisfacen ciertas condiciones (pairingfriendly curves), en particular, el grado de inmersión de dichas curvas debe ser pequeño. En este trabajo se obtienen familias explicitas de curvas elípticas idóneas para este escenario. Dicha criptografía está basada en el cálculo de emparejamientos sobre curvas, cálculo factible gracias al algoritmo de Miller. Proponemos una versión más eficiente que la clásica de este algoritmo usando la representación de un número en forma no adyacente (NAF).Este trabajo ha sido financiado por el Ministerio de Economía y Competitividad con los proyectos MTM2010-21580-C02-01/02 y MTM2010-16051

Elliptic curves with j = 0, 1728 and low embedding degree

Elliptic curves over a finite field Fq with j-invariant 0 or 1728, both supersingular and ordinary, whose embedding degree k is low are studied. In the ordinary case we give conditions characterizing such elliptic curves with fixed embedding degree with respect to a subgroup of prime order . For k = 1, 2, these conditions give parameterizations of q in terms of and two integers m, n. We show several examples of families with infinitely many curves. Similar parameterizations for k ? 3 need a fixed kth root of the unity in the underlying field. Moreover, when the elliptic curve admits distortion maps, an example is provided

Androgen action via testicular arteriole smooth muscle cells is important for leydig cell function, vasomotion and testicular fluid dynamics

Regulation of blood flow through the testicular microvasculature by vasomotion is thought to be important for normal testis function as it regulates interstitial fluid (IF) dynamics which is an important intra-testicular transport medium. Androgens control vasomotion, but how they exert these effects remains unclear. One possibility is by signalling via androgen receptors (AR) expressed in testicular arteriole smooth muscle cells. To investigate this and determine the overall importance of this mechanism in testis function, we generated a blood vessel smooth muscle cell-specific AR knockout mouse (SMARKO). Gross reproductive development was normal in SMARKO mice but testis weight was reduced in adulthood compared to control littermates; this reduction was not due to any changes in germ cell volume or to deficits in testosterone, LH or FSH concentrations and did not cause infertility. However, seminiferous tubule lumen volume was reduced in adult SMARKO males while interstitial volume was increased, perhaps indicating altered fluid dynamics; this was associated with compensated Leydig cell failure. Vasomotion was impaired in adult SMARKO males, though overall testis blood flow was normal and there was an increase in the overall blood vessel volume per testis in adult SMARKOs. In conclusion, these results indicate that ablating arteriole smooth muscle AR does not grossly alter spermatogenesis or affect male fertility but does subtly impair Leydig cell function and testicular fluid exchange, possibly by locally regulating microvascular blood flow within the testis