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Artykuły w czasopismach na temat "SAND BATTERY"
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Battista, Petronilla, Eleonora Catricalà, Marco Piccininni, Massimiliano Copetti, Valentina Esposito, Cristina Polito, Antonio Miozzo i in. "Screening for Aphasia in NeuroDegeneration for the Diagnosis of Patients with Primary Progressive Aphasia: Clinical Validity and Psychometric Properties". Dementia and Geriatric Cognitive Disorders 46, nr 3-4 (2018): 243–52. http://dx.doi.org/10.1159/000492632.
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Background: We evaluated the psychometric proprieties of the Screening for Aphasia in NeuroDegeneration (SAND) battery in Italian primary progressive aphasia (PPA) and movement disorder (MD) patients. Methods: The sample included 30 consecutive PPA and 45 MD patients who completed the SAND battery together with a clinical interview and a neurological/neuropsychological examination and 130 healthy controls (HC). Results: The SAND battery showed good internal consistency and good convergent and divergent validity. receiver operating characteristic analysis revealed an area under the curve of 0.978 for PPA versus HC and of 0.786 for PPA versus MD. A cutoff ≥3 gave a sensitivity of 0.933% and a specificity of 0.946% for discriminating PPA versus HC, whereas a cutoff ≥5 gave a sensitivity of 0.767% and a specificity of 0.667% for discriminating PPA versus MD. Conclusion: These results indicate that the SAND battery is an adequate, reliable, and valid diagnostic tool for PPA.
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Bai, Yuxia, Jin Liu, Zezhuo Song, Fan Bu, Changqing Qi i Wei Qian. "Effects of Polypropylene Fiber on the Liquefaction Resistance of Saturated Sand in Ring Shear Tests". Applied Sciences 9, nr 19 (29.09.2019): 4078. http://dx.doi.org/10.3390/app9194078.
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This study focused on investigating the effects of polypropylene fiber on the liquefaction resistance of saturated sand. We performed a battery of tests with a state-of-the-art ring shear apparatus on fiber-reinforced saturated sand, considering the influences of fiber content and sand density. Two different shearing methods named shear-torque-controlled (STC) and cyclic-torque-controlled (CTC) were considered for carrying out the tests. An energy approach was chosen to evaluate the results, and the fiber reinforcement mechanisms were analyzed. Our test results showed that in STC tests, the shear strength and shearing time of saturated sand increased proportionally to an increase of fiber content and sand density. The cycles required for liquefaction in CTC tests also increase with an increase in sand density and fiber content. The presence of fibers clearly increases the shear energy required for liquefaction. The shear energy increases with an increase in sand density and fiber content. Greater total shear energy is required in specimens with a higher density or larger fiber content. Fiber reinforcement in sand has acted as a spatial network in interlocking soil grains, thereby resulting in the necessity of more energy for overcoming the resistance during the shearing process. After performing the shearing test, the unreinforced specimen with loose structure collapsed totally, and the one with a dense structure collapsed partially, while fiber reinforcement specimens still maintained structural stability.
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Picillo, Marina, Sofia Cuoco, Immacolata Carotenuto, Filomena Abate, Roberto Erro, Giampiero Volpe, Maria Teresa Pellecchia, Eleonora Catricalà, Stefano Cappa i Paolo Barone. "Clinical use of SAND battery to evaluate language in patients with Progressive Supranuclear Palsy". PLOS ONE 14, nr 10 (11.10.2019): e0223621. http://dx.doi.org/10.1371/journal.pone.0223621.
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Rahmawati, F., Z. Faiz, D. A. N. Romadhona, T. E. Saraswati i W. W. Lestari. "The performance of sodium ion battery with NaFePO4 cathode prepared from local iron sand". IOP Conference Series: Materials Science and Engineering 902 (28.10.2020): 012008. http://dx.doi.org/10.1088/1757-899x/902/1/012008.
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., Prihantono, Anisah . i K. Adi Sambowo. "Analysis Compressive Strength of Solid Waste Recycling Battery As a Partially Replacing Sand in Concrete". KnE Social Sciences 3, nr 12 (25.03.2019): 681. http://dx.doi.org/10.18502/kss.v3i12.4140.
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Hunt, Julian David, Behnam Zakeri, Jakub Jurasz, Wenxuan Tong, Paweł B. Dąbek, Roberto Brandão, Epari Ritesh Patro i in. "Underground Gravity Energy Storage: A Solution for Long-Term Energy Storage". Energies 16, nr 2 (11.01.2023): 825. http://dx.doi.org/10.3390/en16020825.
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Low-carbon energy transitions taking place worldwide are primarily driven by the integration of renewable energy sources such as wind and solar power. These variable renewable energy (VRE) sources require energy storage options to match energy demand reliably at different time scales. This article suggests using a gravitational-based energy storage method by making use of decommissioned underground mines as storage reservoirs, using a vertical shaft and electric motor/generators for lifting and dumping large volumes of sand. The proposed technology, called Underground Gravity Energy Storage (UGES), can discharge electricity by lowering large volumes of sand into an underground mine through the mine shaft. When there is excess electrical energy in the grid, UGES can store electricity by elevating sand from the mine and depositing it in upper storage sites on top of the mine. Unlike battery energy storage, the energy storage medium of UGES is sand, which means the self-discharge rate of the system is zero, enabling ultra-long energy storage times. Furthermore, the use of sand as storage media alleviates any risk for contaminating underground water resources as opposed to an underground pumped hydro storage alternative. UGES offers weekly to pluriannual energy storage cycles with energy storage investment costs of about 1 to 10 USD/kWh. The technology is estimated to have a global energy storage potential of 7 to 70 TWh and can support sustainable development, mainly by providing seasonal energy storage services.
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Gaglio, Gabriella, Ettore Napoli, Francesca Arfuso, Jessica Maria Abbate, Salvatore Giannetto i Emanuele Brianti. "Do Different LED Colours Influence Sand Fly Collection by Light Trap in the Mediterranean?" BioMed Research International 2018 (27.06.2018): 1–7. http://dx.doi.org/10.1155/2018/6432637.
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Light traps represent the most used attractive system to collect and monitor phlebotomine sand flies. Recent studies have suggested that light traps can be easily upgraded by the use of light-emitting diode (LED) with positive effects on trap design, weight, and battery life. However, scant data on the effect of different LED colours on the attractiveness to phlebotomine sand fly species are available in literature. In this study, the capture performances of light traps equipped with different LED colours on phlebotomine sand fly species indigenous in the Mediterranean area were evaluated. Phlebotomine sand fly collections were performed using a classical light trap (CLT), equipped with a traditional incandescent lamp, and five Laika 4.0 light traps supplied, each with LED of different colours and wavelengths: (i) white; (ii) red; (iii) green; (iv) blue; (v) UV. Light traps were set for three consecutive nights fortnightly from May to October 2017 and climate data recorded using a meteorological station. A total of 411 phlebotomine sand flies (191 males and 220 females), belonging to three different species, namely, Phlebotomus perniciosus (n= 298, 141 males and 157 females), Sergentomyia minuta (n=110, 48 males and 62 females), and Phlebotomus neglectus (n=3, 2 males and 1 females) were collected. Abundance of capture was influenced by colours of LED and time. The highest number of phlebotomine sand flies was captured on June (P<0.01) and by UV LED (P<0.01). As regard to species, P. perniciosus was mainly captured by UV LED on June (P<0.01). No effect of time (P>0.05) or LED colour (P>0.05) was recorded for S. minuta and P. neglectus. According to the results of the present study light trap equipped with UV LED can represent an effective tool for the capture of sand fly species in the Mediterranean area.
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Ahmad, Ahmad, Erniwati Erniwati i Vivi Hastuti RM. "Analisis Nilai Kapasitansi Komposit Lithium Besi Oksida (Li5FeO4) dan Karbon Aktif Kulit Biji Mete sebagai Bahan Dasar Elektroda Baterai Lithium: Efek Variasi Massa". Jurnal Penelitian Pendidikan Fisika 5, nr 3 (15.07.2020): 233. http://dx.doi.org/10.36709/jipfi.v5i3.13932.
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Previous researchers have investigated the manufacture of lithium battery electrode materials from Li5FeO4 composites with activated carbon of cashew nutshells. However, the effect of combining activated carbon to the lithium battery electrode material was not reviewed. The purpose of this study was to determine the effect of the comparison of the mass composition of Li5FeO4 and cashew nut shell active carbon on the capacitance value of the lithium battery electrode. These electrodes generated using the high-temperature solid-state method. The material used is iron oxide Fe2O3 from iron sand and LiOH.H2O, which homogenized with a sintering temperature of 850̊C for 15 hours with a ratio of 6/1 to produce Li5FeO4. Then Li5FeO4 was compiled with activated carbon of cashew nut shells with a mass fraction of activated carbon 60%, 50%, 40%, and 20%. Furthermore, it characterized using cyclic voltammetry. The results of cyclic voltammetry characterization for a mass fraction of 60% produce a capacitance of 4.7 F / g, a mass fraction of 50% produces a capacitance of 59.1 F / g, a mass fraction of 40% produces a capacitance of 87, 3 F / g, and a mass fraction of 20% produces capacitance of 243 F / g. From the four variations of mass fraction, the capacitance that meets the lithium battery electrode capacitance on the market is the mass fraction of 20%.
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Guo, Ziting, Shengwen Zhong, Mihong Cao, Zhengjun Zhong, Qingmei Xiao, Jinchao Huang i Jun Chen. "High-Temperature-Annealed Multi-Walled Carbon Nanotubes as High-Performance Conductive Agents for LiNi0.5Co0.2Mn0.3O2 Lithium-Ion Batteries". Metals 13, nr 1 (23.12.2022): 36. http://dx.doi.org/10.3390/met13010036.
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In this work, the high yield of MWNTs was prepared by chemical vapor deposition (CVD) method, followed by annealing at 2000–2800 °C, and the effects of high annealing temperature on metal impurities and defects in multi-walled carbon nanotubes (MWNTs) was explored. Furthermore, the annealed MWNTs were dispersed using a sand mill to make a conductive slurry, and finally the cathode LiNi0.5Co0.2Mn0.3O2 was added to the assembled batteries, and the application of MWNTs (slurry) as conductive agents in LiNi0.5Co0.2Mn0.3O2 (NCM) cathode materials by sand-mill dispersion on the performance of lithium-ion batteries was investigated. The results indicate that high temperature annealing can effectively remove the residual metal impurities from MWNTs and the defects in MWNTs gradually decreases as the temperature rises. In addition, 2 wt% of MWNTs (slurry) in LiNi0.5Co0.2Mn0.3O2 is sufficient to form an electronically conductive network; as a result, the electronic conductivity and the high rates performance of the LiNi0.5Co0.2Mn0.3O2 batteries were greatly improved. The LiNi0.5Co0.2Mn0.3O2 battery with MWNTs slurries annealed at 2200 ℃ as a conductive additive displays the highest initial discharge capacity of 173.16 mAh·g−1 at 0.1 C. In addition, after 100 cycles, a capacity retention of 95.8% at 0.5 C and a discharge capacity of 121.75 mAh·g−1 at 5 C were observed. The multi-walled carbon nanotubes used as conductive agents in LiNi0.5Co0.2Mn0.3O2 (NCM) cathode materials show excellent battery behaviors, which would provide a new insight for the development of high-performance novel conductive agents in lithium-ion batteries.
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Boretti, Alberto, Stefania Castelletto, Wael Al-Kouz i Jamal Nayfeh. "The energy future of Saudi Arabia". E3S Web of Conferences 181 (2020): 03005. http://dx.doi.org/10.1051/e3sconf/202018103005.
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In a recent publication, North European experts argue that “Saudi Arabia can achieve a 100% renewable energy power system by 2040 with a power sector dominated by PV single-axis tracking and battery storage”. They also say “Battery storage contributed up to 30% of the total electricity demand in 2040 and the contribution increases to 48% by 2050”. Based on considerations specific to the geography, climate conditions, and resources of Saudi Arabia, it is explained as batteries and photovoltaic solar panels are not the best choice for the country's energy sector. To cover all the total primary energy supply of Saudi Arabia by solar photovoltaic, plus battery storage to compensate for the sun's energy intermittency, unpredictability, and seasonal variability, is impracticable and inconvenient, for both the economy and the environment. Better environment and economy may be achieved by further valorizing the fossil fuel resources, through the construction of other high-efficiency plants such as the combined cycle gas turbine plants of Qurayyah, development of novel technologies for the production of clean fuels and clean electricity, including oxyfuel combustion and carbon capture and storage. Construction of nuclear power plants may also be more beneficial to the economy and the environment than photovoltaic and batteries. Regarding solar energy, enclosed trough solar thermal power systems developed along the coast have much better perspectives than solar photovoltaic, as embedded thermal energy storage is a better approach than battery storage. Further, a centralized power plant works better than distributed rooftop photovoltaic installations covered by dust and sand, rusted or cracked. Finally, pumped hydro energy storage along the coast may also have better perspectives than battery storage.
Rozprawy doktorskie na temat "SAND BATTERY"
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Belaid, Sofiane. "Formulation et procédé d'élaboration sans solvant d'électrodes de batteries Lithium-ion". Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10038.
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Ces travaux de recherche ouvrent une nouvelle voie d’élaboration par voie sèche (sans utilisation de solvants organiques) d’électrodes pour batterie lithium-ion. Le procédé consiste en l’extrusion des différents constituants de l’électrode (liant, matière active et agent conducteur) en présence d’un polymère sacrificiel. Une première étude a porté sur le choix de l’agent conducteur et la nature du revêtement du substrat collecteur afin d’optimiser les propriétés électriques de l’électrode. Ensuite, afin d’une part justifier la cohésion des charges malgré un faible taux de liant et d’autre part expliquer certaines pertes de performances notamment en terme de conductivité électrique et ionique, nous avons étudié les interactions charges-polymère et mis en évidence la présence de polymère adsorbé/greffé à la surface des charge, connu sous le terme de « bound rubber ». Dans une dernière étude, nous avons enfin montré qu’il était possible de contrôler le taux de porosité de l’électrode permettant ainsi de formuler sans solvant une électrode répondant totalement au cahier des charges initial. En effet, des électrodes avec un taux de matière active supérieur à 80 %m (taux de charges global supérieur à 80 %vol), un taux de porosité de 40 %, une épaisseur inférieure à 100 μm, électriquement conductrices, et enfin de capacité initiale de 145 mA.h/g ont été réaliséesThis study aims to find a new way of lithium-ion battery electrodes production using dry process. The production procedure consists on the extrusion of different compounds of the electrode (binder, active material and conductive agent) with a sacrificial polymer. First, a study was established to choose optimal conductive agent and coating material of the collector substrat in order to optimize electrical properties of the electrode. Then the interaction between charges and polymer was studied to justify charges cohesion despite the low amount of the binder and to explain some performances loss mainly in terms of ionic and electrical conductivity. This study revealed the presence of adsorbed / grafted polymer on the surface of charges, known as "bound rubber". Finally, we showed that electrode porosity could be controlled. In addition it was proved that it is possible to perform a dry electrode responding to initial specifications. In fact, electrodes with active material content greater than 80 wt% ( rate of global fillers greater than 80 vol % ), a rate of porosity of 40 vol % , a thickness less than 100 μm, high electrically conductive and finally a specific capacity of 145 mA.h/g were performed
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El, Mahboubi Firdaous. "Stockage adaptatif pour noeud de capteur sans fil autonome et sans batterie". Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30218/document.
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L'autonomie énergétique est un verrou majeur au déploiement massif de réseau de capteurs sans fil dans nombreuses applications. La récupération d'énergie et son stockage constituent une voie pour améliorer cette autonomie. Dans certaines applications en environnement sévère ou nécessitant des durées de vie élevées, l'utilisation de batteries pour le stockage est prohibée. On a alors recours à du stockage sur supercondensateurs. Ce type de stockage présente des inconvénients nécessitant un compromis entre 3 facteurs : la charge rapide des supercondensateurs (capacité faible), l'énergie maximale stockée (capacité forte) et la maximisation de l'usage de l'énergie stockée (tension résiduelle basse). Pour répondre à ces critères apparemment contradictoires, nous avons proposé trois architectures de stockage auto-adaptatif. La première est composée d'une matrice de quatre supercondensateurs identiques, interconnectés par des interrupteurs, dont la capacité équivalente s'adapte à l'énergie stockée. Les deuxième et troisième architectures sont constituées de deux supercondensateurs, l'une de capacité faible et l'autre de capacité grande, la différence entre les deux architectures étant liée au nombre et type d'interrupteurs utilisés. Les architectures de stockage auto-adaptatif que nous avons proposées incluent une circuiterie de contrôle appropriée autoalimentée et permettant de faire varier la capacité apparente du dispositif. De plus, chaque architecture permet un démarrage à froid avec des supercondensateurs complètement vides. Ces trois architectures ont d'abord été optimisées en simulation puis validées expérimentalement en composants discrets. Finalement, nous avons implémenté l'architecture de stockage auto-adaptatif à deux supercondensateurs au sein d'un système de mesure sans fil complet utilisant une source de récupération d'énergie et son électronique associée pour son alimentation et montré la pertinence de cette approche de stockage reconfigurable. En termes d'efficacité d'usage de l'énergie, elles permettent d'atteindre jusqu'à 94,7% en composants discrets, valeur qui pourrait être encore améliorée en version intégrée sur silicium à la fois pour la circuiterie de contrôle et les supercondensateursEnergy autonomy is a major challenge in the massive deployment of wireless sensor networks in numerous applications. Energy harvesting and storage can serve as solutions to the autonomy issues. However, the harsh environment of certain applications requires a long lifetime since the use of batteries for storage is prohibited. We then resort to storage on ultra-capacitors. This type of storage has disadvantages that require a compromise between 3 factors: the fast charge of ultra-capacitors (low capacity), the maximum energy storage (strong capacity), and the maximization of stored energy utilization (low residual voltage). To meet these seemingly contradictory criteria, we propose three self-adaptive storage architectures. The first consists of a matrix of four identical ultra-capacitors, interconnected by switches, whose equivalent capacity adapts to the stored energy. The second and third architectures consist of two ultra-capacitors, one of low capacity and the other of large capacity, the difference between the two architectures being related to the number and type of switches used. The self-adaptive storage architectures that we propose include a suitable self-powered control circuitry to vary the apparent capacity of the device. In addition, each architecture allows a cold start with completely empty ultra-capacitors. These three architectures were first optimized through simulation, and then validated experimentally with discrete components. Finally, we implemented the self-adaptive storage architecture with two ultra-capacitors in a completely wireless measurement system, using an energy harvesting source and its associated electronics for its power supply, and demonstrated the relevance of this approach of reconfigurable storage. In conclusion, we deduce that the topologies can reach an efficiency of energy usage of up to 94.7% by employing discrete components, a value that could be further improved through the exploitation of a silicon integrated version for both the control circuitry and the ultra-capacitors
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Elango, Rakesh. "Thick binder free electrodes for Li-ion battery using Spark Plasma Sintering and templating approach". Thesis, Amiens, 2018. http://www.theses.fr/2018AMIE0047/document.
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La réalisation du stockage d'énergie et le retour de l'approvisionnement en énergie est crucial pour plusieurs applications (VE, téléphones portables, ordinateurs portables). Des électrodes épaisses avec des matériaux inactifs minimisés dans la batterie globale peuvent améliorer la densité d'énergie des batteries lithium-ion. Spark Plasma Sintering est une technique de densification avancée qui a été utilisée pour préparer des électrodes épaisses en quelques minutes. L'approche de modèle est adoptée pour préparer des électrodes poreuses avec des tailles de pores et des morphologies interconnectées bien contrôlées. Ici, des particules de microsize de chlorure de sodium sont utilisées comme agent de gabarit pour créer des pores à l'intérieur des électrodes épaisses. Ces électrodes frittées sans liant sont auto-supportées, ce qui contribue à augmenter la densité énergétique des batteries lithium-ion. Les performances électrochimiques des batteries demi- et pleines révèlent une capacité surfacique spécifique remarquable (20 mA h cm-2), qui est 4 fois supérieure à celle des électrodes de 100 μm présentes dans les batteries Li-ion classiques (5 mAh cm) -2). L'étude morphologique 3D est réalisée par micro-tomodensitométrie pour obtenir des valeurs de tortuosité et des distributions de tailles de pores conduisant à une forte corrélation avec leurs propriétés électrochimiques. Ces résultats démontrent que le couplage entre le procédé de matriçage de sel et le frittage par plasma d'étincelles est également appliqué pour la fabrication d'électrodes épaisses en utilisant d'autres matériaux actifs et que différentes configurations de cellules sont également proposéesThe achievement of energy storage and return of energy supply is crucial for several applications (EVs, cellphones, laptops). Thick electrodes with minimized inactive materials in the overall battery can improve the energy density of lithium ion batteries. Spark Plasma Sintering is an advanced densification technique has been used to prepare thick electrodes in minutes. The templating approach is adopted for preparing porous electrodes with interconnected well-controlled pore sizes and morphologies. Here, sodium chloride microsize particles are used as a templating agent to create pores inside the thick electrodes. These sintered binder-free electrodes are self-supported that helps to increase the energy density of lithium ion batteries. The electrochemical performances of half and full batteries reveal a remarkable specific areal capacity (20 mA h cm−2), which is 4 times higher than those of 100 μm thick electrodes present in conventional tape-casted Li–ion batteries (5 mA h cm−2). The 3D morphological study is carried out by micro computed tomography to obtain tortuosity values and pore size distributions leading to a strong correlation with their electrochemical properties. These results demonstrate that the coupling between the salt templating method and the spark plasma sintering is also applied for thick electrodes fabrication using other active materials and also different cell configurations are proposed
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Yoon, Sang Jun [Verfasser]. "Development of modified graphite felt electrodes for the vanadium redox flow battery / Sang Jun Yoon". Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2020. http://d-nb.info/1216104743/34.
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Sabry, Mohab. "Shaft resistance of a single vertical or batter pile in sand subjected to axial compression or uplift loading". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ64056.pdf.
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Meekhun, Dariga. "Réalisation d'un système de conversion et de gestion de l'énergie d'un système photovoltaïque pour l'alimentation des réseaux de capteurs sans fil autonomes pour application aéronautique". Thesis, Toulouse, INSA, 2010. http://www.theses.fr/2010ISAT0031/document.
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Le projet SACER vise à répondre aux demandes d’Airbus qui ont besoin de disposer de données décrivant le comportement d’un avion ou d’un satellite avant commercialisation ou lancement. Pour mieux répondre à cette demande, un réseau de capteurs sans fil remplacerait les équipements de test filaires existants. Le but est d’apporter des avantages tels qu’une réduction de poids, de coût et de connectique. Pour notre part, nous n’avons travaillé que sur l’application aéronautique.Pour alimenter les capteurs autonomes sans fil embarqués, dans le cadre de cette thèse, il faut concevoir une architecture de récupération d’énergie, un système de stockage de l’énergie ainsi que un circuit de gestion de ces énergies. La principale contrainte pour le système est qu’il doit pouvoir fonctionner de -50C à 100°C, tout en délivrant une puissance de sortie de 3 watts. De plus, l’épaisseur du système doit être inférieure à 3,2 mm.Pour notre travail, nous avons cherché, dans un premier temps, la meilleure solution possible sur le choix du type de cellules solaires. Le résultat sur les tests des cellules à différentes températures et irradiations dans les conditions de notre application est présenté. Dans un second temps, nous avons testé plusieurs types de systèmes de stockage d’énergie aux températures extrêmes. Enfin, la conception de l’architecture pour la gestion de l’énergie (vue d’ensemble des panneaux photovoltaïques, d’un circuit MPPT, des super condensateurs, et d’un régulateur) est présentéeFlight tests of a commercial aircraft consist in gathering data during flight to validate aircraft design. However they are very expensive for various reasons. One of them is that most of the sensors implemented to collect data are wired. As an example, for the sole system that monitors the vibrations onboard a large (more than 100 seats) aircraft, more than 100 sensors may be deployed. Such networks are complex to implement, mainly because of the required wiring. A wireless solution is therefore of great interest; however, such a cable-less implementation implies both wireless transmission of data together with energy autonomy.The purpose of this work is therefore to describe a design of a power generation system, focusing on photovoltaic, together with the associated management strategies for an autonomous wireless sensor network deployed for large aircraft in-flight tests. This work is a part of SACER project. The main requirements are related to the thickness of the system (less than 3,2mm in order not to disturb the aerodynamic air flow) and the output power (3 W per sensor node in order to power the sensor, data processing and transmission system). In addition, the system has to properly work at extremely high and low temperature (-50 to 100°C). Our system consists of three primary components to consider: Energy Harvesting system, Energy storage device and Energy management system.In this work, we firstly present the comparison of the performance of different photovoltaic technologies at different temperatures concerning their availability and achievable power density in aircraft applications. Secondly, we will investigate the possibility of using batteries and supercapacitor. Finally the power management system, composed by a photovoltaic panel, a power conditioning (MPPT function), supercapacitors and a DC/DC regulator, is presented
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Champault, Françoise. "Combattre sans se battre : une approche de la ritualisation du combat au Japon". Paris, INALCO, 1994. http://www.theses.fr/1994INAL0010.
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Durand-Estèbe, Paul. "Systèmes de récupération d'énergie pour l'alimentation de capteurs autonomes pour l'aéronautique". Thesis, Toulouse, INSA, 2016. http://www.theses.fr/2016ISAT0033/document.
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Ces travaux portent sur la récupération et le stockage d’énergie pour l’alimentation de capteurs sans fil dans un contexte aéronautique. Dans un premier temps, nous présentons la problématique particulière de l’alimentation des capteurs sans fil dans un tel domaine et dressons un état de l’art des différentes technologies de stockage et de récupération pouvant répondre à ce besoin. Dans un deuxième temps, à travers l’étude et la réalisation de deux récupérateurs, nous montrons les possibilités qu’apporte cette technologie et détaillons les contraintes de conception qu’impose le milieu afin d’obtenir une alimentation robuste et fiable. Le premier récupérateur présenté est une alimentation photovoltaïque située sur l’extrados de l’aile d’un A321 alimentant des bandes de capteurs sans fil proches. Le système fournit 2 watts, fonctionne par temps couvert et résiste aux températures fortement négatives (-50°C) et aux basses pressions (200hPa) qui sont rencontrées à l’altitude de croisière de cet appareil. Le deuxième récupérateur est une alimentation thermoélectrique placée dans le mât réacteur d’un A380 pour alimenter un système de capteurs dédié à la surveillance de l’état de structure. Le système résiste aux températures élevées (300°C) et aux importantes vibrations de la zone d’installation et produit l’énergie nécessaire à l’alimentation du système de capteurs. Les choix et les étapes de conception ayant menés aux deux systèmes sont détaillés, tant au niveau de l’assemblage mécanique que des circuits électroniquesThis work deals with energy harvesting and storage to power aircraft embedded wireless sensors. First, we discuss the issue of powering wireless sensors in an aircraft and we present a state of the art of the various energy harvesting and storage technologies that could be used. Then, through the design and construction of two harvesters, we show the possibilities offered by this technology and we explain the design constraints imposed by the application to get a reliable and robust power supply. The first harvester is a photovoltaic power supply located on the upper surface of an A321’s wing supplying a wireless sensors belt nearby. The systems provides 2 watts to the load, works with cloudy weather and is highly resistant to negative temperature (-50°C) and low pressure (200hPa) that are met at aircraft cruising altitude. The second harvester is a thermoelectric power supply located in an A380 pylon supplying a structural health monitoring system. The harvester is highly resistant to high temperature (300°C) and severe vibrations of the installation area and manages to generate the required energy to supply the structural health monitoring sensors. Mechanical and electronic design steps and choices that led to both harvesters are detailed and discussed
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Bramas, Quentin. "Réseaux de capteurs sans fil efficaces en énergie". Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066309/document.
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Les réseaux de capteurs sans fil sont constitués de noeuds capteurs, capables de récolter des données, de les analyser et de les transmettre. Ces réseaux ont plusieurs applications, en fonction de la zone où ils sont déployés. Application militaire ou de sauvetage dans des zones pouvant être inaccessibles aux humains ; application sanitaire avec des capteurs déployés sur et dans le corps humain ; application de surveillance avec des capteurs sur les voitures d'un ville, ou les arbres d'une forêt. Les noeuds sont autonomes en énergie et il est primordial d'assurer leur longévité sans retarder la récolte des données. La tache principale réalisée par les réseaux de capteurs sans fils consiste à effectuer des mesures et à envoyer ces données jusqu'à un noeud coordinateur. Cette tache d'agrégation est effectuée régulièrement, ce qui en fait la plus consommatrice d'énergie. L'étude approfondie de la consommation d'énergie des capteurs, qui au centre de ma thèse, peut se traduire de différentes manières. Premièrement, nous avons étudié la complexité du problème de l'agrégation de données en utilisant un modèle simplifié pour représenter un réseau de capteurs sans fils. Secondement, nous nous sommes concentrés sur l'estimation de cette durée de vie. Nous présentons WiSeBat, un modèle de batterie et de consommation d'énergie optimisé pour les réseaux de capteurs, implémenté dans le simulateur WSNET. Après validation, nous l'utilisons pour comparer les performances des algorithmes de broadcast efficaces en énergieA wireless sensor network is an ad-hoc network connecting small devices equipped with sensors. Such networks are self-organized and independent of any infrastructure. The deployment of a WSN is possible in areas inaccessible to humans, or for applications with a long lifetime requirement. Indeed, devices in a wireless sensor network are usually battery-powered, tolerate failure, and may use their own communication protocols, allowing them to optimize the energy consumption. The main application of WSNs it to sense the environment at different locations and aggregate all the data to a specific node that logs it and can send alerts if necessary. This task of data aggregation is performed regularly, making it the most energy consuming. As reducing the energy consumed by sensor is the leading challenge to ensure sustainable applications, we tackle in this thesis the problem of aggregating efficiently the data of the network. Then, we study lifetime evaluation techniques and apply it to benchmark existing energy-centric protocols
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Monthéard, Romain. "Récupération d'énergie aéroacoustique et thermique pour capteurs sans fil embarqués sur avion". Thesis, Toulouse, INSA, 2014. http://www.theses.fr/2014ISAT0026/document.
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Ces travaux portent sur la question de l’autonomie énergétiquedes capteurs sans fil dans un contexte aéronautique, à laquelle la récupérationet le stockage d’énergie ambiante sont susceptibles d’apporter uneréponse. Nous étudions dans un premier temps la génération thermoélectrique,destinée à être appliquée au suivi du vieillissement structurelprès de la zone moteur, et débouchant sur la réalisation d’un démonstrateur.Nous proposons ensuite une architecture de stockage capacitif qui,en s’adaptant à son état de charge, vise à améliorer la performance de cettesolution de stockage en termes de temps de démarrage, de taux d’utilisationd’énergie et sous certaines conditions, de transfert d’énergie. Finalement,nous rapportons les résultats d’une étude prospective sur la récupérationd’énergie du vent relatif grâce au phénomène aéroacoustique. Nousmontrons que cette méthode présente un potentiel énergétique intéressant,puis nous présentons la conception et la réalisation d’un circuit optimiséde gestion de l’énergie, permettant d’alimenter grâce à cette technique uncapteur sans fil de températureThis work adresses the issue of energy autonomy within wirelesssensor networks embedded in aircrafts, which may be solved throughambient energy harvesting and storage. In a first study, we develop a demonstratorbased on thermal gradients energy harvesting, which is designedto supply power to a structural health monitoring system implementednear the engine zone. Thereafter, we introduce a capacitive storagearchitecture which self-adapts to its own state of charge, aiming at improvingits performance in terms of startup time, the energy utilization ratioand under some conditions, the energy transfer. Finally, we report the resultsof a prospective study on aeroacoustic energy harvesting appliedto the relative wind. It is shown that this method exhibits an interestingpotential in terms of generated power, then we introduce the design andthe realization of an optimized energy management circuit, allowing ourtechnique to supply power to a wireless temperature sensor
Części książek na temat "SAND BATTERY"
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Mahalakshmi, M., B. Soundara i C. D. Hashini. "Experimental and Numerical Investigation of Combined Batter Pile–Raft Foundation Embedded in Sand". W Lecture Notes in Civil Engineering, 357–63. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6346-5_31.
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Mishimar, Nozomu. "Identification of Product Specifications Based on KANO Model and Application to Ecodesign". W Lecture Notes in Mechanical Engineering, 781–89. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-28839-5_87.
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AbstractIt is said that KANO model is one of the key findings in analyzing and categorizing various product qualities. The model says qualities are not only one dimensional in terms of the relations between quality fulfilment and customer satisfaction. If a designer could find a delighter which can increase customer satisfaction greatly without enhancing specification too much may contribute to increase product eco-efficiency, since higher specifications usually lead to larger environmental burden. The study extracts some design specifications of smartphones and carries out an online survey to smartphone users in order to identify the relations between the specification levels and customer satisfaction levels. As the result of the survey, a true exciter could not be found in the case study products. However, regression coefficients estimated by applying conjoint analysis to the selected specifications showed there were specifications which can effectively increase customer satisfaction such as battery capacity or display size, and also there was a specification having little effect in increasing it. The survey results suggested that there are optimum values of product specifications. Identifying the optimum values and avoiding over-specification is significant in finding appropriate design solutions which may decouple the customer satisfaction and the environmental burden increase. The study concluded that the approach is helpful in enhancing product sustainability by Ecodesign.
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"Battre les Japonais". W Le sang jaune de Bombardier, 83–92. Presses de l'Université du Québec, 2011. http://dx.doi.org/10.2307/j.ctv18ph2vh.12.
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Matsumoto, Taihei, i Kenji Tanaka. "A Design Method to Achieve Decarbonisation in Airports with Battery Operation Algorithm Considering Uncertainties". W Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220651.
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Decarbonisation of social infrastructures such as airports have attracted wide attention. In commiting to the global decarbonisation target, introduction of renewable energy is important. However, few research has focused on the specifications of renewable energy facilities for airports. Thus, it is vital to enable airport operators to determine the necessary facility specifications for installing renewable energy systems. Moreover, the efficiency of battery operation influences the necessary facility specifications. Yet, many previous studies have proposed linear battery optimisation, even though forecasts for renewable energy supply include uncertainties derived from natural factors, and demand forecasts can also fluctuate due to future uncertainties. This study provides a framework for analysing the cost efficiency of photovoltaic systems, wind systems, and batteries to determine the optimal specifications for each hardware to achieve 100% renewable electricity. Further, it proposes a novel battery operation algorithm considering uncertainties of supply and demand forecasts. A case study on Chubu Centrair International Airport was conducted. The results show practical steps for the airport to achieve decarbonisation. In addition, battery operation based on the proposed algorithm outperformed the linear optimisation in the unpredicted rain weather scenario. It can be said that the proposed method performs well in considering uncertainties.
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Pawar, V. P., Bhagyashree Kunte i Srinivas Tumuluri. "Liar, Liar—Is ‘Apple’ on Fire?" W Indian Business Case Studies Volume II, 107–20. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780192869388.003.0013.
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Abstract In South Korea, Apple has said that as part of its next update, expected in March of 2018, it will give users the option to turn off the feature that slows down the older handsets. The firm has already reduced the price of any out-of-warranty iPhone 6 or later battery replacements, by more than half. Ian Morris, a Forbes Media contributor explains: Firstly, Apple will replace the batteries in older phones for a greatly reduced price. The company will drop this service from $79 to $29. This will apply to anyone who has an iPhone 6 or later and will be available for the next year—ending in December 2018. Secondly, the company says that it will provide more battery information from within iOS. This will give users a clear indication if it is the age of their battery that is causing them problems. For some users, it will simply be issues with apps. But the phone will make it clearer if a battery replacement would help or not. The third step is to look at how Apple manages the phones themselves. If the customer had an unexpected shutdown then he/she might find that a less than ideal way for your phone to work. So perhaps in future, we’ll see the iPhone sending notifications to warn that the battery in the device needs replacing. Or perhaps offering a choice of slowing down the max performance to get a bit more power—a bit like the existing power-saving mode. The explanation would’ve been acceptable before the issue arose or at the time of releasing updates that slowed devices. The explanation—forced by lawsuits, complaints, and information revealed by third parties—is inadequate. Temin says despite the bad software update process, very few users lost trust in Apple. However, when iPhone owners understood that the upgrades were planned to slow their devices, without even informing them, their trust just ‘vanished’.
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Low, Setha. "Place Attachment and Cultural Identity". W Why Public Space Matters, 151—C8.F7. Oxford University PressNew York, 2023. http://dx.doi.org/10.1093/oso/9780197543733.003.0008.
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Abstract Chapter 8. Place Attachment and Cultural Identity: Monuments, Parks, and Neighborhood Public Space in San José, Costa Rica, and the Statue of Liberty and Battery Park City in New York City identifies place attachment and cultural identity as significant aspects of public space use. Culture-related activities such as music, dance, festivals, and celebrations reinforce cultural values, beliefs, and meanings. The removal of monuments and symbolic icons of an oppressive and violent past—and the struggle over these decisions—is essential to recognizing and respecting all people’s cultural histories and collective memories. Symbolic and material aspects of public space also play a crucial role in a community’s response to a crisis or disaster. The examination of the symbolism of the Statue of Liberty and the post-9/11 use of public space at Battery Park City deepen our understanding of how cultural expressions, identities, and continuity are essential aspects of public space.
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Wells, H. G. "What I Saw of the Destruction of Weybridge and Shepperton". W The War of the Worlds. Oxford University Press, 2021. http://dx.doi.org/10.1093/owc/9780198702641.003.0012.
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As the dawn grew brighter we withdrew ourselves from the window from which we had watched the Martians, and went very quietly downstairs. The artilleryman agreed with me that the house was no place to stay in. He proposed, he said, to make his way Londonward, and thence rejoin his battery—No. 12, of the Horse Artillery. My plan was to return at once to Leatherhead, and so greatly had the strength of the Martians impressed me that I had determined to take my wife to Newhaven,* and go with her out of the country forthwith. For I already perceived clearly that the country about London must inevitably be the scene of a disastrous struggle before such creatures as these could be destroyed.
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Buchsenschutz, Olivier. "Clamor, couvre-chefs et batterie de cuisine : communication et cryptage des données chez les Celtes de l’âge du Fer". W Signes et communication dans les civilisations sans paroles, 171–80. Éditions du Comité des travaux historiques et scientifiques, 2016. http://dx.doi.org/10.4000/books.cths.1979.
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Cossart, Paula, i Julien Talpin. "« Les coopératives ne valent que pour battre monnaie. » Les relations du champ politique socialiste et de la coopération ouvrière à Roubaix (fin XIXe-début XXe siècle)". W La politique sans en avoir l'air, 163–78. Presses universitaires de Rennes, 2012. http://dx.doi.org/10.4000/books.pur.128847.
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Chard, Daniel S. "Implosion". W Nixon's War at Home, 229–59. University of North Carolina Press, 2021. http://dx.doi.org/10.5149/northcarolina/9781469664507.003.0011.
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Bureaucratic conflict over responses to leftist guerrillas culminated in the downfall of FBI officials L. Patrick Gray and W. Mark Felt as well as the end of the Nixon presidency. Yet, as this chapter demonstrates, the tremendous manpower and resources the FBI had dedicated to fighting terrorism proved largely ineffectual. The Weather Underground withered on its own in 1973 and 1974 while the Black Liberation Army sputtered out in a wave of violent clashes with police that opened investigative leads for the FBI and New York Police Department, who collaborated in an interagency task force. Meanwhile, a new leftist guerrilla group—the Symbionese Liberation Army (SLA) out of San Francisco—generated a fresh high-profile crisis in February 1974 after kidnapping newspaper heiress Patty Hearst. Clarence M. Kelley, the FBI’s new director, was left with the challenge of further improvising counterterrorism while reforming the FBI and its battered image amid Watergate, the SLA investigation, and growing public controversy over FBI domestic surveillance.
Streszczenia konferencji na temat "SAND BATTERY"
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Vyas, Abhay M., i Gyaneshwar Singh Kushwah. "Sand Battery: An Innovative Solution for Renewable Energy Storage (A Review)". W 2023 IEEE Renewable Energy and Sustainable E-Mobility Conference (RESEM). IEEE, 2023. http://dx.doi.org/10.1109/resem57584.2023.10236319.
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Rahmawati, Fitria, Arum A. Kusumaningtyas, Teguh E. Saraswati, Iwan Yahya i Younki Lee. "Preparation of NaFeO2 from iron sand as a raw material for cathode of sodium-ion battery". W THE 14TH JOINT CONFERENCE ON CHEMISTRY 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0005348.
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Furquan, Mohammad, S. Vijayalakshmi i Sagar Mitra. "Iron oxide shell coating on nano silicon prepared from the sand for lithium-ion battery application". W INTERNATIONAL CONFERENCE ON NANOMATERIALS FOR ENERGY CONVERSION AND STORAGE APPLICATIONS: NECSA 2018. Author(s), 2018. http://dx.doi.org/10.1063/1.5035236.
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Ahmad, Muhammad Abdullah Azam Undu, Suci Rahmadhani Ahmanas, Erniwati i Suritno Fayanto. "Utilization of iron sand and activated carbon of cashew nut shell as a material basic of lithium battery". W THE 8TH NATIONAL PHYSICS SEMINAR 2019. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5132679.
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Hadi Keong, Azwan, Jesus Campos, Andrei Casali, Anders Hansen, Sindre Vingen, Jordi Segura, Mark Hofacker, Ted Brueren i Inge Fossdal. "Hybrid Electro-Optical Cable Continuously Powers Downhole Coiled Tubing Telemetry and Enables Time and Carbon Footprint Reductions During Extensive Cleanout Interventions". W SPE/ICoTA Well Intervention Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/204435-ms.
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Abstract On the Norwegian continental shelf (NCS), coiled tubing (CT) cleanout requires small bites and frequent wiper trips to the surface due to potential sand bedding in a large and deviated completion. A real-time CT downhole measurement system is used to optimize the operation, following a dynamic workflow. Conventionally, the system is powered by downhole lithium battery, which limits CT downhole operating time. A continuous surface-powered system was needed to promote further optimization for such operation. A new hybrid electro-optical cable was introduced to enable continuous power supply from surface to the real-time downhole tool sensors. The system consists of a surface power module that sends power through a layer of low-DC-resistance conductors and optical fibers that enable data telemetry. Conventionally, only three to four trips can be completed before replacement of the downhole battery is required. Battery replacement can take up to 8 hours due to the complexity of that offshore environment. With the continuous power supply, the CT cleanout operation can continue for days without interruption of data from the downhole tool sensors. A three-well CT cleanout campaign in the NCS demonstrated the benefits of this new real-time downhole measurement system by using accurate downhole weight and torque readings to control the penetration through scale and avoid motor stalls. Sections of scale bridges were identified during the cleanout by monitoring fluctuations of downhole torque of the mill. The monitoring allows CT operators to control penetration rate and bite length during the cleanout. When the milled debris are swept, downhole weight is used to detect early signs of solids plugging around the mill. Downhole pressures complement surveillance of the sweeping of solids to the surface by giving a qualitative measurement of solids loading through conversion of the real-time bottomhole pressure reading into equivalent circulating density with changing CT depth. The process of optimizing bite length and sweeping speed is repeated without interruption thanks to continuous power supply from the surface, eventually leading to time reduction. In one of the wells, downhole tools uninterruptedly acquired data for 10 days straight. The CT managed to clean out a total of 40 908 kg of a mixture of scale and sand, with an estimated average time reduction of 25% when compared to CT cleanout without real-time downhole data. Delivery of continuous high-voltage power to downhole tools not only enables reduction in operating time, it also paves the way for extending the capabilities of CT interventions by enabling the operation of more electrically activated application tools. It allows combining multiple work scopes in a single CT run, which reduces operating cost and provides greater operational flexibility. Finally, eliminating the dependency on lithium batteries reduces the carbon footprint for a more sustainable operation.
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Cunningham, Violet, Alexander Tilton, Dylon Maertens i Shawn Duan. "Innovative Design of Indoor-Outdoor Powerchair". W ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23497.
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Abstract People with disabilities often struggle with mobility issues, so there is a strong desire for devices such as powerchairs, which can provide more freedom. Currently, wheelchair demand in the US is increasing due to an upsurge in the elderly population. Often electric powerchairs suitable for outdoor use are extremely expensive, cannot be used indoors, and are not covered by medical insurance. In this project, these problems are addressed through the design of a chair which is suitable for both rough outdoor terrain and indoor use. This project is based on a request for a powerchair which our client’s son, who has cerebral palsy, can use on family trips in outdoor environments including grass, gravel, and sand. A photo of a previous nonfunctional prototype was provided to the team as a reference, and a full redesign was performed to resolve the problems identified. Before proceeding with the design, various sources were consulted to gain a thorough understanding of currently available technology and design methods. Many different adjustment methods and features were considered, including an adjustable frame, tracks, and a lifting system for curb mounting. The overall design selected is a welded sheet metal frame with wheels, and it was determined that the chair should have an adjustable wheelbase width to provide both outdoor stability and indoor maneuverability. Key considerations for the design include battery life, motor torque, maximum load, seat size, door width, and cost. The final specifications are based on the needs of the client, Kevin Sample, as well as an analysis of the wider consumer market. The width adjustment design uses an axle above the driving wheels, which are connected to it by sliding sleeves. Automatic adjustment is accomplished using a linear actuator. The drive wheels are large and run at low pressure to surmount obstacles and damp vibrations. Differential steering combined with rear caster wheels gives the chair a small turning radius, and its length is comparable to that of standard manual wheelchairs. The seat can be easily removed to access the battery and control system or to load the chair into a vehicle. A joystick is used to control the speed and direction of the chair, while a separate momentary switch is used for the linear actuator. Throughout the modeling process, stress analysis was performed using simulations in Inventor. Any necessary adjustments were made to ensure that none of the parts will fail, considering both failure theory and fatigue. Various grades of aluminum were selected for the majority of the manufactured parts, due to their corrosion resistance and light weight. The device is currently in the prototype manufacturing stage. If it is later marketed, a curb mounting device may also be included; this was decided against mainly due to cost and time restrictions. Space has also been left for a carrying basket, which will likely be added to the first prototype. The initial goal is to produce a single chair for our client, although the design may later be submitted for Medicare and ADA approval.
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Navarro Luengo, Ildefonso, Adrián Suárez Bedmar i Pedro Martín Parrado. "El castillo de San Luis (Estepona Málaga): Origen y evolución de una fortificación abaluartada. Siglos XVI-XXI". W FORTMED2020 - Defensive Architecture of the Mediterranean. Valencia: Universitat Politàcnica de València, 2020. http://dx.doi.org/10.4995/fortmed2020.2020.11552.
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The castle of San Luis (Estepona Málaga): Origin and evolution of a bastion fort. Sixteenth to twenty-first centuriesThe results of the investigation prior to the excavation work in the Castle of San Luis, in Estepona (Málaga, Spain) are presented. It is a coastal fortress built in the last quarter of the sixteenth century, in the context of the reorganisation of the defense of the western coast of Malaga after the Moorish rebellion of 1568. After analysing the available literature, we propose that it was designed by the Engineer Juan Ambrosio Malgrá, Maestro Mayor de obras del Reino de Granada. The Castle of San Luis is devised as an add-on construction on the southern front of the walls of Islamic origin, dominating the natural anchorage of the Rada beach. Its most prominent elements are three bastions, two of them with casemates, and a large main square. However, various defects in the design and execution of the works, added to the insufficient provision of artillery and garrison, affected the effectiveness of the fortification throughout its history. In the middle of the eighteenth century, part of the Castle of San Luis is restructured as a cannons’ battery. Following the damage caused by the Lisbon Earthquake, in 1755, and by the French and English blastings in 1812, during the second half of the nineteenth century much of the castle disappears, leaving only the cannons’ battery, which is incorporated as a courtyard in height as an add-on to a house built at the end of the nineteenth century. At present, after several decades of abandonment, excavation works have been undertaken on the remains of the battery, after which the site will be prepared to be used as a museum.
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Kim, Jinyong, Jinho Lee, Jaehoon Jeong, Hyoungshick Kim, Jung-Soo Park i Taeho Kim. "SAN: Self-Adaptive Navigation for Drone Battery Charging in Wireless Drone Networks". W 2016 30th International Conference on Advanced Information Networking and Applications Workshops (WAINA). IEEE, 2016. http://dx.doi.org/10.1109/waina.2016.103.
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Smith, Jackson, Bryan Bidwell, Abdlmonem Beitelmal i Timothy Hight. "Formula Electric System: Thermal Management Design". W ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65279.
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This paper presents the thermal management analysis performed on lithium polymer cells designed for High Performance Electric Vehicle (HPEV) applications. The objective was to choose an optimum temperature range for the cells to operate at, determine the thermal response of the cells under their full spectrum of discharge capabilities, calculate the necessary convective heat transfer necessary to maintain the cells within said temperature range, then to create a thermal management solution to incorporate into a battery pack composed of 288 cells. Thermal testing and modeling on individual lithium polymer cells determined the thermal response and amount of convection cooling required for the cells over their intended duty cycles. A convective heat transfer coefficient of 50 W/m2K was determined to be sufficient to prevent the proposed cell from exceeding the optimum temperature range during its most strenuous duty cycle. The proposed design scheme utilized a fan to force air circulation up along the side of modules where each module consists of four cells connected in series. A proposed feedback control loop system allowed for active control of the battery cell’s temperature resulting in an increase in efficiency and overall performance for HPEV applications.
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He, Shuyun, Yaqian He i Ping Liu. "Study on the Dynamic Response of Vertical and Batter Pile Groups in Saturated Sands". W The 10th International Symposium on Project Management, China. Riverwood, NSW, Australia: Aussino Academic Publishing House, 2022. http://dx.doi.org/10.52202/065147-0050.
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Furman, Burford, Laxmi Ramasubramanian, Shannon McDonald, Ron Swenson, Jack Fogelquist, Yu Chiao, Alex Pape i Mario Cruz. Solar-Powered Automated Transportation: Feasibility and Visualization. Mineta Transportation Institute, grudzień 2021. http://dx.doi.org/10.31979/mti.2021.1948.
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A solar-powered automated transportation network (ATN) connecting the North and South campuses of San José State University with three passenger stations was designed, visualized, and analyzed in terms of its energy usage, carbon offset, and cost. The study’s methodology included the use of tools and software such as ArcGIS, SketchUp, Infraworks, Sketchup, Rhinoceros, and Autodesk 3DS Max. ATN vehicle energy usage was estimated using data from the university’s Park & Ride shuttle bus operation and by modeling with SUMOPy, the advanced simulation suite for the micro-traffic simulator SUMO. The energy study showed that an extensive solar photovoltaic (PV) canopy over the guideway and stations is sufficient for the network to run 24/7 in better-than-zero net-metered conditions—even if ridership were to increase 15% above that predicted from SJSU Park & Ride shuttle data. The resulting energy system has a PV-rated output of 6.2 MW, a battery system capacity of 9.8 MWh, and an estimated cost of $11.4 million USD. The solar ATN also produces 98% lower CO2 and PM2.5 emissions compared to the Park & Ride shuttle bus. A team of experts including urban planners, architects, and engineers designed and visualized the conceptual prototype, including a comprehensive video explaining the need for solar ATN and what a typical rider would experience while utilizing the system. This research demonstrates both benefits and challenges for solar-powered ATN, as well as its functionality within the urban built environment to serve diverse San José neighborhoods.
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Murray, Chris, Keith Williams, Norrie Millar, Monty Nero, Amy O'Brien i Damon Herd. A New Palingenesis. University of Dundee, listopad 2022. http://dx.doi.org/10.20933/100001273.
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Robert Duncan Milne (1844-99), from Cupar, Fife, was a pioneering author of science fiction stories, most of which appeared in San Francisco’s Argonaut magazine in the 1880s and ’90s. SF historian Sam Moskowitz credits Milne with being the first full-time SF writer, and his contribution to the genre is arguably greater than anyone else including Stevenson and Conan Doyle, yet it has all but disappeared into oblivion. Milne was fascinated by science. He drew on the work of Scottish physicists and inventors such as James Clark Maxwell and Alexander Graham Bell into the possibilities of electromagnetic forces and new communications media to overcome distances in space and time. Milne wrote about visual time-travelling long before H.G. Wells. He foresaw virtual ‘tele-presencing’, remote surveillance, mobile phones and worldwide satellite communications – not to mention climate change, scientific terrorism and drone warfare, cryogenics and molecular reengineering. Milne also wrote on alien life forms, artificial immortality, identity theft and personality exchange, lost worlds and the rediscovery of extinct species. ‘A New Palingenesis’, originally published in The Argonaut on July 7th 1883, and adapted in this comic, is a secular version of the resurrection myth. Mary Shelley was the first scientiser of the occult to rework the supernatural idea of reanimating the dead through the mysterious powers of electricity in Frankenstein (1818). In Milne’s story, in which Doctor S- dissolves his terminally ill wife’s body in order to bring her back to life in restored health, is a striking, further modernisation of Frankenstein, to reflect late-nineteenth century interest in electromagnetic science and spiritualism. In particular, it is a retelling of Shelley’s narrative strand about Frankenstein’s aborted attempt to shape a female mate for his creature, but also his misogynistic ambition to bypass the sexual principle in reproducing life altogether. By doing so, Milne interfused Shelley’s updating of the Promethean myth with others. ‘A New Palingenesis’ is also a version of Pygmalion and his male-ordered, wish-fulfilling desire to animate his idealised female sculpture, Galatea from Ovid’s Metamorphoses, perhaps giving a positive twist to Orpheus’s attempt to bring his corpse-bride Eurydice back from the underworld as well? With its basis in spiritualist ideas about the soul as a kind of electrical intelligence, detachable from the body but a material entity nonetheless, Doctor S- treats his wife as an ‘intelligent battery’. He is thus able to preserve her personality after death and renew her body simultaneously because that captured electrical intelligence also carries a DNA-like code for rebuilding the individual organism itself from its chemical constituents. The descriptions of the experiment and the body’s gradual re-materialisation are among Milne’s most visually impressive, anticipating the X-raylike anatomisation and reversal of Griffin’s disappearance process in Wells’s The Invisible Man (1897). In the context of the 1880s, it must have been a compelling scientisation of the paranormal, combining highly technical descriptions of the Doctor’s system of electrically linked glass coffins with ghostly imagery. It is both dramatic and highly visual, even cinematic in its descriptions, and is here brought to life in the form of a comic.