1,046 research outputs found

    Valoraci贸n de las competencias de los profesionales con maestr铆a que demandan las escuelas de administraci贸n de empresas en las universidades m谩s representativas del departamento de Lambayeque seg煤n el modelo UNED, 2015

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    El concepto de competencias se sigue implementando cada vez m谩s en el 谩mbito laboral a nivel mundial, haciendo que las empresas requieran de colaboradores competentes, los cuales les permita tener mayor efectividad en las actividades profesionales que desempe帽en. La presente investigaci贸n busc贸 determinar la valoraci贸n de las competencias de los profesionales con maestr铆a que demandan las escuelas de administraci贸n de empresas en las universidades m谩s representativas del departamento de Lambayeque, tomando como referencia el modelo UNED. La metodolog铆a que se utiliz贸 para la valoraci贸n de dichas competencias radic贸 en la aplicaci贸n directa de encuestas y entrevistas a los encargados de la selecci贸n y reclutamiento de personal de las universidades m谩s representativas del departamento de Lambayeque, lo cual permiti贸, conseguir informaci贸n acerca de las exigencias en cuanto al perfil esperado que los profesionales con maestr铆a deben tener para desempe帽ar de manera eficiente los desaf铆os que se les presentar谩n al instante de iniciar su vida laboral en dichas entidades. Con la culminaci贸n de este estudio se pudo determinar que las competencias m谩s valoradas fueron la capacidad para tomar decisiones y para resolver conflictos, lo cual no deja de lado que los profesionales son conscientes de la necesidad de formarse en valores como la 茅tica, la responsabilidad y el respeto hacia los dem谩s fomentando as铆 actitudes como el aprendizaje continuo y la pro actividad.Tesi

    The Idea and Scope of Glocal Public Philosophy

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    [銇仒銈併伀] 2016骞11鏈8鏃ャ伀銆佸北鑴囩洿鍙告皬銈掋亰鎷涖亶銇椼仸鍗冭憠澶у鍏叡瀛︿細璎涙紨浼氥倰闁嬪偓銇椼仧銆傛潵骞村害锛2017 骞村害锛夈倛銈婂崈钁夊ぇ瀛︺仹銇屼汉鏂囧叕鍏卞搴溿嶃仺銇椼仸銇敼绲勩亴琛屻倧銈屻併仌銈夈仾銈嬪叕鍏卞銆佸叕鍏辩爺绌躲伄鐧哄睍銈掗层倎銇︺亜銇嶃仧銇勩仺鑰冦亪銈嬩腑銆12 骞淬伓銈娿伀灞辫剣鍏堢敓銇崈钁夊ぇ瀛︺伀銇婅秺銇椼亜銇熴仩銇嶃併屻偘銉兗銈儷鍏叡鍝插銇剰缇┿佸焦鍓层佸皠绋嬨嶃仺銇勩亞銈裤偆銉堛儷銇с亰瑭便亜銇熴仩銇勩仧

    Variasi Temperatur Pencampuran Terhadap Parameter Marshall Pada Campuran Lapis Aspal Beton

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    This study was conducted to determine the effect of temperature variations on the mixing processof the asphalt concrete AC-WC (Asphalt Concrete-Wearing Course) subtle gradations in themiddle limit and lower limit of the Marshall parameters with reference to specifications of BinaMarga, 2010.From the results of experiments conducted that the optimum asphalt content is used to middle limitusing a asphalt content of 5,7% and 6,8% for the lower limit after that mixing was done usingtemperature variation of 120 o C, 130 o C, 140 o C, 150 o C, and 160 o C.To a mixture of Laston AC-WC subtle gradations middle limit grading 5,7% asphalt contentmixing temperature using a temperature of 120 o C, 130 o C, 140 o C, 150 o C, 160 o C and still meet allstandards of marshall parameters. Ideal mixing temperature variations in the middle limit ofmixing temperature 150 o C-160 o C. While the lower limit to the level of 6,8% asphalt contentmixing temperatures between 120 o C-160 o C did not meet the specifications, because the MQ valuebelow the minimum value of 250 kg / mm

    Joint Production and Energy Modeling for Sustainable Manufacturing Systems

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    This dissertation proposes a framework for addressing challenges of joint production and energy modeling for manufacturing systems. The knowledge generated is used to improve the technological readiness of manufacturing enterprises for the transition towards sustainable manufacturing in the context of smart electric grids. Detailed research tasks of the framework on the modeling of production, energy efficiency, electricity demand, cost, and demand response decision making have been implemented. Specifically, the dynamics and performance measures of general manufacturing systems with multiple machines and buffers have been modeled. Expressions of electricity energy efficiency and cost have been established based on the electricity pricing profile. Production scheduling problem formulations and the solution technique are discussed. New insights are acquired based on the applications of the established model in system parameter monotonicity analysis, rate plan switching decision making, and demand response scheduling. The findings based on case studies show that with appropriate adjustment of production routines, significant improvement in energy efficiency and substantial savings in energy cost can be achieved without sacrificing production. Appropriate implementation of this research outcome may lead to energy-efficient, electricity-demand-responsive, and cost-effective operations and thus improve the sustainability of modern manufacturing systems. The new knowledge generated can be implemented to discrete manufacturing in various industries such as automotive, electronics, appliances, aerospace, etc

    Highly Permeable and Robust Responsive Nanoporous Membranes by Selective Swelling of Triblock Terpolymers with a Rubbery Block

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    The selective swelling of amphiphilic block copolymers has been demonstrated to be extremely facile and efficient in producing nanoporous membranes. However, all previous works are limited to diblock copolymers composed of two glassy blocks, suffering from inherent mechanical weakness. Here we elucidate the selective swelling-induced pore generation of triblock terpolymers with a rubbery polyisoprene (PIP) block, polyisoprene-<i>block</i>-polystyrene-<i>block</i>-poly颅(2-vinylpyridine) (PIP-<i>b</i>-PS-<i>b</i>-P2VP). A short exposure to ethanol turns the initially dense films to nanoporous membranes with well-defined interconnected porosity. We fabricate composite membranes with the nanoporous terpolymer thin films as the selective layers deposited on macroporous substrates. Using PS-<i>b</i>-P2VP diblock copolymer without a rubbery third block for comparison, we identify the role of the rubbery PIP blocks in determining the mechanical properties as well as the swelling behaviors of the terpolymer. The rubbery PIP blocks enhance the mechanical robustness of the nanoporous membranes as revealed by nanoindentation tests on one hand and evidently accelerate the swelling process because of their softening effect to the PS matrix on the other hand, thus leading to 2鈥3-fold improved permeability. Moreover, the membranes exhibit a fast stimuli-responsive function as well as enhanced hydrophilicity because of the preferential aggregation of P2VP chains on the pore walls

    Sn@CNT Nanostructures Rooted in Graphene with High and Fast Li-Storage Capacities

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    Development of materials with carefully crafted nanostructures has been an important strategy for the next-generation lithium-ion batteries to achieve higher capacity, longer cycle life, and better rate capability. Graphene-based and Sn-based anode materials are promising anodes with higher capacities than graphite; however, most of them exhibit fast capacity fading at prolonged cycling and poor rate capability. This paper reports a hierarchical Sn@CNT nanostructure rooted in graphene, which exhibits larger than theoretical reversible capacities of 1160鈥982 mAh/g in 100 cycles at 100 mA/g and excellent rate capability (828 mAh/g at 1000 mA/g and 594 mAh/g at 5000 mA/g). The excellent electrochemical performances compared to graphene/Sn-based anodes have been attributed to the efficient prevention of graphene agglomeration by Sn@CNT decoration and the increased electrochemical activities of Sn by CNT shell protection and GNS support

    Monolithic Membranes with Designable Pore Geometries and Sizes via Retarded Evaporation of Block Copolymer Supramolecules

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    We develop a retarded evaporation approach for the alignment of cylinder-forming block copolymer supramolecular monoliths, 3-<i>n</i>-pentadecyl颅phenol (PDP) hydrogen-bonded polystyrene-<i>b</i>-poly颅(4-vinylpyridine) (PS-<i>b</i>-P4VP). A variety of highly ordered, aligned morphologies are produced by varying the dosages of PDP in the supramolecules. Treatment of the aligned supramolecular monoliths in hot ethanol leads to the dissolution of PDP and the selective swelling of P4VP, yielding enlargeable ordered mesopores along the original P4VP/PDP domains. Particularly, from supramolecular monoliths aligned in the morphology of perpendicular cylinders and gyroids, we obtain highly ordered monolithic membranes containing enlarged straight pores and bicontinuous pores, respectively. The straight and gyroidal pores were filled with phenol鈥揻ormaldehyde resol and further carbonized to produce well-defined carbon nanostructures including nanofibers and reversed gyroids, demonstrating the pore accessibility and the promising templating functionality of the resulted monolithic membranes

    Molybdenum Disulfide Quantum Dots as a Photoluminescence Sensing Platform for 2,4,6-Trinitrophenol Detection

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    Transition metal chalcogenides, especially molybdenum disulfide (MoS<sub>2</sub>), have recently attracted wide attention from researchers as graphene-analogous materials. However, until now, little literature has reported the synthesis of photoluminescent MoS<sub>2</sub> materials and their applications in analytical chemistry. We herein presented a facile bottom-up hydrothermal route for the synthesis of photoluminescent MoS<sub>2</sub> quantum dots (QDs) by using sodium molybdate and cysteine as precursors. The prepared MoS<sub>2</sub> QDs were characterized by transmission electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, photoluminescence spectroscopy, and UV鈥搗is spectroscopy. The MoS<sub>2</sub> QDs were then used as photoluminescent probes to construct a photoluminescence (PL) quenching sensor for detection of 2,4,6-trinitrophenol (TNP). The TNP sensor presented a wide linear range from 0.099 to 36.5 渭M with a high detection limit of 95 nM. Furthermore, the sensor displayed a high sensitivity toward TNP over other structurally similar compounds like 2,4,6-trinitrotoluene, p-chlorophenol, phenol, and 2,6-di-<i>tert</i>-butyl-4-methylphenol. To understand the origin of the high sensitivity, we assessed the emission wavelength-dependent PL quenching behavior of MoS<sub>2</sub> QDs by the above five compounds using Stem鈥揤olmer equation in detail. The results showed that the novel approach we put forward can satisfactorily explain the interaction mechanisms between MoS<sub>2</sub> QDs and the five compounds, and the high sensitivity for TNP very likely originated from a combination of the PL resonance energy transfer, electronic energy transfer, and electrostatic interactions between MoS<sub>2</sub> QDs and TNP. Finally, the sensor was successfully applied for detection of TNP in water samples and test papers

    Distribution of the parameters of contrast response functions in different ranges of contrast distributions.

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    <p>Distributions of <i>C<sub>50</sub></i>, <i>n</i>, and <i>R<sub>max</sub></i> are shown in the three columns and the Low, Medium, and High contrast ranges are shown in the three rows. The mean 卤 SD (n鈥=鈥33) is indicated at the top of each panel. %: % of contrast. i/s: spikes/s.</p

    Contrast responses under stimulus contrasts distributing in different ranges.

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    <p><i>A</i>: An example cell. Data from different ranges of contrast distributions were plotted with different symbols: 鈻 <b>Full</b> for full range of contrast (10% to 90%), 鈻 <b>Low</b> for low range (10% to 50%), 鈻 <b>Medium</b> for medium range (30% to 70%), 鈥 <b>High</b> for high range (50% to 90%). <i>B</i>: The mean response of the 33 cells to 50% contrast decreased when the mean of the contrast range increased. The responses were normalized to the maximal response among the responses of each neuron to the 50% contrast contained in the three stimulus contrast ranges. <i>C</i>: The mean <i>C<sub>50</sub></i> of the contrast response function increased with the increase in the mean of the contrast range when fitted with <i>Equation</i> (1) (holding <i>n</i> and <i>R<sub>max</sub></i> constant). <i>D</i>: The mean <i>R<sub>max</sub></i> of contrast response function decreased with the increase in the mean of the contrast range when fitted with <i>Equation</i> (1) (holding <i>n</i> and <i>C<sub>50</sub></i> constant) (see Text for details). Note that the data presented in <i>B</i>, <i>C</i>, and <i>D</i> are the mean 卤 SD (n鈥=鈥33), not the mean 卤 s.e.m.</p