Lithium solvation in dimethyl sulfoxide-acetonitrile mixtures

We present molecular dynamics simulation results pertaining to the solvation of Li+ in dimethyl sulfoxide-acetonitrile binary mixtures. The results are potentially relevant in the design of Li-air batteries that rely on aprotic mixtures as solvent media. To analyze effects derived from differences in ionic size and charge sign, the solvation of Li+ is compared to the ones observed for infinitely diluted K+ and Cl− species, in similar solutions. At all compositions, the cations are preferentially solvated by dimethyl sulfoxide. Contrasting, the first solvation shell of Cl− shows a gradual modification in its composition, which varies linearly with the global concentrations of the two solvents in the mixtures. Moreover, the energetics of the solvation, described in terms of the corresponding solute-solvent coupling, presents a clear non-ideal concentration dependence. Similar nonlinear trends were found for the stabilization of different ionic species in solution, compared to the ones exhibited by their electrically neutral counterparts. These tendencies account for the characteristics of the free energy associated to the stabilization of Li+Cl−, contact-ion-pairs in these solutions. Ionic transport is also analyzed. Dynamical results show concentration trends similar to those recently obtained from direct experimental measurements.Fil: Semino, Rocio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Zaldivar, Gervasio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Calvo, Ernesto Julio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Laria, Daniel Hector. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina. Comisión Nacional de Energía Atómica; Argentin

Deep Reinforcement Sequence Learning for Visual Captioning

Methods to describe an image or video with natural language, namely image and video captioning, have recently converged into an encoder-decoder architecture. The encoder here is a deep convolutional neural network (CNN) that learns a fixed-length representation of the input image, and the decoder is a recurrent neural network (RNN), initialised with this representation, that generates a description of the scene in natural language. Traditional training mechanisms for this architecture usually optimise models using cross-entropy loss, which experiences two major problems. First, it inherently presents exposure bias (the model is only exposed to real descriptions, not to its own words), causing an incremental error in test time. Second, the ultimate objective is not directly optimised because the scoring metrics cannot be used in the procedure, as they are non-differentiable. New applications of reinforcement learning algorithms, such as self-critical training, overcome the exposure bias, while directly optimising non-differentiable sequence-based test metrics. This thesis reviews and analyses the performance of these different optimisation algorithms. Experiments on self-critic loss denote the importance of robust metrics against gaming to be used as the reward for the model, otherwise the qualitative performance is completely undermined. Sorting that out, the results do not reflect a huge quality improvement, but rather the expressiveness worsens and the vocabulary moves closer to what the reference uses. Subsequent experiments with a greatly improved encoder result in a marginal enhancing of the overall results, suggesting that the policy obtained is shown to be heavily constrained by the decoder language model. The thesis concludes that further analysis with higher capacity language models needs to be performed

Techno-economic assessment of a solar dish micro gas turbine system

In this thesis a thermo-economic assessment of a stand-alone solar dish MGT power plant is presented. The study aims to develop a fundamental understanding of the impact of the main cycle parameters on plant performances and costs and to evaluate the possibility to incorporate hybridisation and thermal storage, considering technical limitations and economic aspects. Objective have been achieved developing a flexible and modular tool for design and off-design performance evaluation of micro-turbine based solar power plants. This can then be adopted for different layouts and operational strategies. The model was validated against experimental data demonstrating the applicability and accuracy of the model for thermo-economic optimisation purposes. To guarantee modularity and flexibility an object-oriented programming approach, using the software C++, is adopted. Each component is represented using a class made of functions that perform a one dimensional physical design for both design point and off-design performance in addition to a cost function. Results in output from the above-mentioned tool were used to train machine learning algorithms, which were used to perform plant's optimisations considering dissimilar layouts, locations and operational strategies. A multi objective genetic algorithm was adopted as optimisation tool. The objective of the optimisation was to 1mmm1Se the levelised cost of energy of the plant while maxrnusrng the annual po,ver output. Both environmental impact and plant dispachability were considered. As a final outcome of the optimisation: for each considered layout and operationa.l strategy: a candidate point was selected and analysed. Parametric study on possible technological improvements of plants' components was also performed. The proposed optimum plant configurations are shmvn to be advantageous in term of levelised cost of energy, more dispatchable and with a reduced environmental impact

Innovation in Retail Process: From Consumers' Experience to Immersive Store Design

Due to the current advances in Information and Communication Technologies and consumers' increasing interest in entertaining and interactive retail environments, the sector of retailing is forced to pursuit innovation to maintain existing consumers and attract new ones. Especially the use of virtual reality techniques offers tools for supporting the design of innovative systems capable of enhancing this process. The aim of this paper is to integrate the consumers' experience in the development of innovation process for retailing. In particular, our findings highlight how the immersive technologies can be an efficient tool for pushing innovation in retailing. Therefore, the paper provides important issues for scholars and practitioners

Adjustable muscle plication: a new surgical technique for strabismic patients with high risk for anterior segment ischemia

Opinio

HUBUNGAN ANTARA KONTROL DIRI DENGAN INTENSI CYBERLOAFING PADA PEGAWAI DINAS X PROVINSI JAWA TENGAH

HUBUNGAN ANTARA KONTROL DIRI DENGAN INTENSI CYBERLOAFING PADA PEGAWAI DINAS X PROVINSI JAWA TENGAH Suci Laria Sari 15010113140104 Fakultas Psikologi Universitas Diponegoro Semarang ABSTRAK Penggunaan internet yang semakin meluas memberikan dampak negatif bagi menurunnya produktivitas pegawai disebabkan adanya penggunaan internet yang tidak ada hubungannya dengan pekerjaan yang disebut cyberloafing. Penelitian ini bertujuan untuk mengetahui hubungan antara kontrol diri dengan intensi cyberloafing pada pegawai Dinas X Provinsi Jawa Tengah. Kontrol diri adalah kemampuan untuk menyusun, membimbing, mengatur dan mengarahkan bentuk perilaku yang dapat membawa ke arah konsekuensi positif. Intensi cyberloafing adalah niat untuk menggunakan internet melalui gadget, komputer, milik pribadi atau instansi untuk tujuan pribadi saat jam kerja di tempat kerja. Populasi dalam penelitian ini adalah 120 pegawai dan sampel dalam penelitian adalah 60 pegawai. Teknik pengambilan sampel yang digunakan adalah teknik convenience sampling. Alat ukur yang digunakan pada penelitian ini adalah Skala Kontrol Diri (22 aitem, α = 0,880) dan Skala Intensi Cyberloafing (25 aitem, α = 0,949). Analisis regresi sederhana menunjukkan nilai rxy = 0,566 dan p = 0,000 (p < 0,05). Hasil ini menunjukkan adanya hubungan negatif yang signifikan antara kontrol diri dengan intensi cyberloafing. Semakin tinggi kontrol diri, maka semakin rendah intensi cyberloafing dan sebaliknya. Kontrol diri memberikan sumbangan efektif sebesar 32% dalam mempengaruhi intensi cyberloafing, sedangkan sisanya sebesar 68% dipengaruhi oleh faktor lain yang tidak diungkap dalam penelitian ini. Kata kunci: kontrol diri, intensi cyberloafing, pegawa

Evaluation of vision therapy efficacy in intermitent exotropia treatment by 3D video-oculography

Objetivo: Evaluar la eficacia del tratamiento en 3 casos de exotropia intermitente (XT(i)) mediante ejercicios de terapia visual, completando la exploración clínica con Videooculografia-30 y evidenciar la potencial aplicabilidad de esta tecnología para dicho propósito. Métodos: Exponemos los cambios ocurridos tras ejercicios de terapia visual en una mujer de 36 años con XT(i) de -25 dioptrías prismáticas (dp) de lejos y 18 dp de cerca; Un niño de 10 años de edad con 8 dp de XT(i) en posición primaria, asociados a +6 dp de hipotropia izquierda; y un hombre de 63 años con XT(i) de 6 dp en posición primaria asociada a +7 dp de hipertropia derecha. Todos los pacientes presentaron buena agudeza visual corregida en ambos ojos. La inestabilidad de la desviación ocular se evidenció mediante análisis de VOG-30, revelando la presencia de components verticales y torsionales. Se realizaron ejercicios de terapia visual, incluyendo diferentes tipos de ejercicios de vergencias, acomodación y percepción de la diplopía. Resultados: Tras la terapia visual se obtuvieron excelentes rangos de vergencias fusionales y de punto próximo de convergencia («hasta la nariz»). El examen mediante VOG-3D (Sensoro Motoric lnstruments, Teltow, Germany) confirmó la compensación de la desviación con estabilidad del alineamiento ocular. Se observó una significativa mejora después de la terapia en los components verticals y torsionales, lo cuales se hicieron más estables. Los pacientes se mostraron muy satisfechos de los resultados obtenidos. Conclusión: La VOG-3D es una técnica útil para dotamos de un método objetivo de registro de la compensación y estabilidad de la desviación ocular después de realizar ejercicios de terapia visual en casos de XT(i), ofreciéndonos un detallado análisis de la mejoría de los components verticales y torsionales.Objective: To evaluate in three cases of intermittent exotropia (XT(i)) treated by vis ion therapy the efficacy ofthe treatment by complementing the clinical examination with a 3-D video-oculographic register and to evidence the potential applicability of this technology for such purpose. Methods: We report the binocular changes occurring after vision therapy in a woman of 36 years with an XT(i) of 25 prism diopters ( dp) at far and 18 dp at near ; A chiId of 10 years with 8 dp of XT(i) in primary position associated to 6 dp of left eye hipotropia; and a man of 63 years with an XT(i) of 6 dp in primary position associated to 7 dp of right eye hipertropia. AH patients presented good visual acuity with correction in both eyes. Instability of ocular deviation was evident by VOG analysis, revealing also the presence of vertical and torsional components. Vision therapy was prescribed and performed including different types of vergence, accommodation, and consciousness of diplopia training. Results: After therapy, excellent ranges of fusional vergence and a «to-the-nose» near point of convergence were obtained. The VOG-30 examination (Sensoro Motoric lnstruments, Teltow, Germany) confirmed the compensation of the deviation with a high level of stability of ocular alignment. Significant improvement could be observed after therapy in the vertical and torsional components that were found to become more stable. Patients were very satisfied with the outcome obtained. Conclusion: YOG-30 is a useful technique for providing an objective register of the compensation of the ocular deviation and the stability of the alignment achieved after vision therapy in cases of XT(i), providing a detailed analysis of vertical and torsional improvements

Solvatipn Of Excess Electrons In Supercritical Ammonia

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