Letteratura scientifica selezionata sul tema "VFVG"
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Articoli di riviste sul tema "VFVG"
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Hong, Tianzeng, Runze Zhan, Yu Zhang e Shaozhi Deng. "High Crystallinity Vertical Few-Layer Graphene Grown Using Template Method Assisted ICPCVD Approach". Nanomaterials 12, n. 21 (25 ottobre 2022): 3746. http://dx.doi.org/10.3390/nano12213746.
Testo completoAbstract (sommario):
Controllable synthesis of high crystallinity, low defects vertical few-layer graphene (VFLG) is significant for its application in electron emission, sensor or energy storage, etc. In this paper, a template method was introduced to grow high crystallinity VFLG (HCVFLG). A copper mask acted as a template which has two effects in the high-density plasma enhanced deposition which are protecting VFLG from ion etching and creating a molecular gas flow to assist efficient growth. Raman and TEM results confirmed the improved crystallinity of VFLG with the assistance of a copper mask. As a field emitter, the HCVFLG has a large field emission current and a low turn-on field. The maximum field emission current of a single HCVFLG sheet reaches 93 μA which is two orders of magnitude higher than VFLG grown without a mask. The maximum current density of HCVFLG film reached 67.15 mA/cm2 and is 2.6 times of VFLG grown without a mask. The vacuum breakdown mechanism of HCVFLG was contacted interface damage resulting in VFLG detaching from the substrate. This work provides a practical strategy for high-quality VFLG controllable synthesis and provides a simple method to realize the pattern growth of VFLG.
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Hong, Tianzeng, Chan Guo, Yu Zhang, Runze Zhan, Peng Zhao, Baohong Li e Shaozhi Deng. "Effects of Substrates on Nucleation, Growth and Electrical Property of Vertical Few-Layer Graphene". Nanomaterials 12, n. 6 (15 marzo 2022): 971. http://dx.doi.org/10.3390/nano12060971.
Testo completoAbstract (sommario):
A key common problem for vertical few-layer graphene (VFLG) applications in electronic devices is the solution to grow on substrates. In this study, four kinds of substrates (silicon, stainless-steel, quartz and carbon-cloth) were examined to understand the mechanism of the nucleation and growth of VFLG by using the inductively-coupled plasma-enhanced chemical vapor deposition (ICPCVD) method. The theoretical and experimental results show that the initial nucleation of VFLG was influenced by the properties of the substrates. Surface energy and catalysis of substrates had a significant effect on controlling nucleation density and nucleation rate of VFLG at the initial growth stage. The quality of the VFLG sheet rarely had a relationship with this kind of substrate and was prone to being influenced by growth conditions. The characterization of conductivity and field emissions for a single VFLG were examined in order to understand the influence of substrates on the electrical property. The results showed that there was little difference in the conductivity of the VFLG sheet grown on the four substrates, while the interfacial contact resistance of VFLG on the four substrates showed a tremendous difference due to the different properties of said substrates. Therefore, the field emission characterization of the VFLG sheet grown on stainless-steel substrate was the best, with the maximum emission current of 35 µA at a 160 V/μm electrostatic field. This finding highlights the controllable interface of between VFLG and substrates as an important issue for electrical application.
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Wiederin, Ewald. "Aufhebung des § 83 Abs 1 VfGG". Juristische Blätter 137, n. 3 (2015): 171–78. http://dx.doi.org/10.33196/jbl201503017102.
Testo completo
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Király, I., A. Peil, J. Halász, F. Dunemann, M. V. Hanke, T. Deák e M. Tóth. "RATIO OF HOMOZYGOUS AND HETEROZYGOUS VF GENOTYPES IN THE PROGENIES OF APPLE VFVF X VFVF CROSSES". Acta Horticulturae, n. 814 (marzo 2009): 819–24. http://dx.doi.org/10.17660/actahortic.2009.814.139.
Testo completo
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Almazroi, Abdulwahab Ali, Eman A. Aldhahri, Mahmood A. Al-Shareeda e Selvakumar Manickam. "ECA-VFog: An efficient certificateless authentication scheme for 5G-assisted vehicular fog computing". PLOS ONE 18, n. 6 (23 giugno 2023): e0287291. http://dx.doi.org/10.1371/journal.pone.0287291.
Testo completoAbstract (sommario):
Fifth-generation (5G)-enabled vehicular fog computing technologies have always been at the forefront of innovation because they support smart transport like the sharing of traffic data and cooperative processing in the urban fabric. Nevertheless, the most important factors limiting progress are concerns over message protection and safety. To cope with these challenges, several scholars have proposed certificateless authentication schemes with pseudonyms and traceability. These schemes avoid complicated management of certificate and escrow of key in the public key infrastructure-based approaches in the identity-based approaches, respectively. Nevertheless, problems such as high communication costs, security holes, and computational complexity still exist. Therefore, this paper proposes an efficient certificateless authentication called the ECA-VFog scheme for fog computing with 5G-assisted vehicular systems. The proposed ECA-VFog scheme applied efficient operations based on elliptic curve cryptography that is supported by a fog server through a 5G-base station. This work conducts a safety analysis of the security designs to analysis the viability and value of the proposed ECA-VFog scheme. In the performance ovulation section, the computation costs for signing and verification process are 2.3539 ms and 1.5752 ms, respectively. While, the communication costs and energy consumption overhead of the ECA-VFog are 124 bytes and 25.610432 mJ, respectively. Moreover, comparing the ECA-VFog scheme to other existing schemes, the performance estimation reveals that it is more cost-effective with regard to computation cost, communication cost, and energy consumption.
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Ezzat, Eman. "The new in management of recurrent laryngeal granuloma: long term follow-up". Journal of Otolaryngology-ENT Research 11, n. 6 (2019): 245–51. http://dx.doi.org/10.15406/joentr.2019.11.00443.
Testo completoAbstract (sommario):
Background/Aim: Vocal fold granuloma (VFG) is a nonspecific inflammatory process with no well-defined pathogenesis so its clinical and surgical treatment is not standardized. The aim of the study is to determine accurately the longest permissible period of conservative treatment of recurrent VFG, after which the decision of surgery must be made through long-term follow-up of cases with large recurrent posterior VFG, in addition to assessing the results of anew regimen in management of VFG. Material and Methods: this study conducted on 42patients with large recurrent posterior VFG that were on conservative management as long as the granulomas regress in size with follow-up intervals of 3 months through videolaryngoscope (VLS). Those with resistance VFG were subjected to surgical excision with intra-lesional steroid injection in the pedicle. Results: The most frequent related etiopathogenic factor was gastroesophageal reflux, followed by laryngeal intubation and idiopathic. Clinical management with proton pump inhibitor, systemic or local steroids and voice therapy in addition to behavior modification techniques were enough for remission on 80.95% of the patients. Surgical excision for granulomas was effective in 87.5% of the patients. Early recurrences were noticed in only one patient that proved to have a major gastroesophageal problem. Conclusion: VFG well responds to conservative treatment with complete recovery of maximum period 24months even if it is large and recurrent. Managing recurrent or large posterior VFG needs interdisciplinary team that involves an otolaryngologist, phoniatrician, gastroenterologist, and gastrointestinal surgeon. Voice abuse alone couldn't evoke the condition. Steroids are as important as anti-reflux medication in treatment of VFG.
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Sulaiman, Shahidatul Nadia, Noor Shafini Mohamad, Faikah Zakaria e Ann Erynna Lema Thomas Sudin. "Quantification of Visceral Adipose Tissue (VAT) and Subcutaneous Adipose Tissue (SAT) Based on CT Scan Tissue Segmentation Associated with Urolithiasis Recurrence". HEALTH AND WELLNESS II 18, s15 (15 ottobre 2022): 117–23. http://dx.doi.org/10.47836/mjmhs.18.s15.16.
Testo completoAbstract (sommario):
Introduction: The aim of this study is to applied CT scan-based tissue segmentation to measure visceral adipose tissue (VAT) and subcutaneous adipose tissue (SAT) volumes. Then, the ratio of both fat tissue volumes was calculated to get two more parameters: visceral fat volume ratio (VFVR) and subcutaneous fat volume ratio (SFVR). After that, the relationship between these factors and urolithiasis recurrence was examined using correlation analysis. Other parameters, which are the patient’s age and gender, were also tested for correlation analysis with urolithiasis recurrence. Finally, logistic regression analysis was performed to find the association between urolithiasis recurrence and the parameters (age, gender, VAT volume, SAT volume, VFVR and SFVR). Methods: This study was a retrospective cross-sectional study design using the images collected from CT Urology cases in the year 2019. The patients selected have a history of stone removal in 2014. The application used for CT tissue segmentation is 3D Slicer. Results: Urolithiasis recurrence shows medium and high degree of positive correlation with total fat volume, VAT volume, and VFVR (correlation coefficient, cc = 0.254, p = 0.023), (cc = 0.390, p< 0.001) and (cc = 0.688, p< 0.001), respectively and high degree of negative correlation with SFVR (cc = -0.688, p< 0.001). However, using logistic regression analysis, only VAT volume was significantly associated with urolithiasis recurrence (OR 1.11, 95% CI 1.01-1.22, p= 0.03), while the total fat volume, VFVR, and SFVR are not significant. Conclusion: CT scan-based tissue segmentation has a huge impact on fat volume quantification. This study confirms that VAT volume was strongly correlated with urolithiasis recurrence, indicating that VAT volume plays a more important role than SAT volume, total fat volume, VFVR and SFVR in the production of urinary stone. Thus, VAT volume can be further considered as a new independent risk factor for urolithiasis.
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Parsons, Robert F., Filip Vandelook e Steven B. Janssens. "Very fast germination: additional records and relationship to embryo size and phylogeny". Seed Science Research 24, n. 2 (28 marzo 2014): 159–63. http://dx.doi.org/10.1017/s096025851400004x.
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AbstractRecently, a list has been published of angiosperms capable of germinating in less than 24 h (‘very fast germination’). Here, we add three families and 23 species to that list. The main extra families complement ecological groups already recognized – the Cactaceae into the aridity-adapted group and the Tamaricaceae into the floodplain-adapted group. These amended findings on very fast germination (VFG) are integrated into the recent work on the functional ecology of embryo size. They confirm the important connection between germination speed and embryo to seed ratio. Plotting the plant orders containing VFG species on a phylogenetic tree shows that VFG has evolved multiple times throughout angiosperm history, including at least three times within the Caryophyllales. The fact that species with VFG are mainly restricted to advanced clades shows that VFG is a derived trait that evolved as an adaptation to either arid, saline or floodplain habitats.
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YILMAZ, Selçuk. "A bibliometric study of vascularized fibular grafting technique". Anatolian Current Medical Journal 5, n. 3 (28 luglio 2023): 217–26. http://dx.doi.org/10.38053/acmj.1302810.
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Aims: Vascularized fibula graft (VFG) technique is one of these “gold standard” techniques in bone regeneration. Although there have been several bibliometrics studies in orthopedics, there haven’t been any on VFGs. By identifying the gaps in previous research, we sought to provide light on the scientific evolution of VFGs and provide direction for future investigations.
Methods: In this bibliometric study, the Web of Science (WOS) database was used to access publications on VFG published between 1986-2022. A literature search was performed with selected keywords. The dataset obtained was downloaded from the WOS database as an output. This output was analyzed with VOSviewer and Biblioshiny tools.
Results: A total of 430 documents on VFG included the study. A mean of 11.9 articles/year was published on VFG. The first article on VFG published in 1986. Since 2005, there has been an increasing trend in the number of articles and citations. The year with the highest number of both publications (n=32) and citations (n=756) was 2021. The publications on VFG have cited a total of 7300 times, an average of 16.98 citations per publication. Total 51 countries contributed to publications on the VFG between 1986-2022. The United States of America (USA) was identified as the global leader in terms of the number of publications (n=91, 21.163%), followed by Japan (n=58, 13.488%) and China (n=56, 13.023%). The USA had 91 manuscripts and 2162 citations with an H-index:29 and Japan had 58 manuscripts and 1145 citations with an H-index:22.
Conclusion: The literature on VFG is quite limited. Most of the publications are from developed countries. Studies should be supported for this method that can be used in the treatment of many diseases, especially in developing countries.
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Bayusentono, Sulis, e Trixie Brevi Putri. "CONGENITAL PSEUDOARTHROSIS TIBIA IN CHILD WITH NEUROFIBROMATOSIS TYPE 1 TREATED WITH THE COMBINED VASCULARIZED FIBULAR GRAFT AND ELASTIC STABLE INTRAMEDULLARY NAIL (ESIN)". (JOINTS) Journal Orthopaedi and Traumatology Surabaya 9, n. 1 (30 aprile 2020): 22. http://dx.doi.org/10.20473/joints.v9i1.2020.22-28.
Testo completoAbstract (sommario):
Background: CPT is a disorder characterized by a nonunion tibial fracture that occurs spontaneously or after trivial trauma. Therapy usually includes surgical management and aims to gain lifetime bony union, avoid leg length discrepancy, and to prevent mechanical axis deviation, surrounding soft tissue lesion, joint stiffness, and pathological fracture. CPT remains to be a challenging orthopedic issue due to the difficulty to gain and to maintain the union and a functional limb. The combined VFG and ESIN is one of our preferred method in Surabaya.Case: A 13-year-old boy complained about crooked right lower leg since 1-year old, and fractured at 11 years old. In January 2014, the patient underwent ORIF ESIN combined with free VFG. The patient got bony union 24 months after the ORIF ESIN and VFG surgery. RUST modified scoring system showed a score out of 3, which signified that there was a radiographically significant union at the site of tibial pseudoarthrosis.Discussion: The combined VFG and ESIN is to maintain bony union and stability. Intramedullary fixation offers a good tibial alignment and prevents refracture. Hypertrophy and the vitality of VFG support the bony union. The level of success rate in both primary and secondary union is a benefit shown after VFG therapy.Conclusion: The combination of VFG after complete resection of tibial pseudoarthrosis and ESIN in this case report showed a success in achieving and maintaining the bony union, thus this therapy became one of the preferences as a suitable standard therapy that we use in our hospital institution.
Tesi sul tema "VFVG"
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Fonseca, Ana Sofia Godinho da. "Impactes ambientais da integração vs eliminação de resíduos de VFV". Master's thesis, Universidade de Aveiro, 2011. http://hdl.handle.net/10773/8592.
Testo completoAbstract (sommario):
Mestrado em Engenharia do AmbienteContexto e objetivo O modelo de gestão de VFV preconizado em Portugal encontra-se balizado, em termos de objetivos e metas, pela política comunitária para o ano 2015, nomeadamente ao nível da reciclagem (a um nível mínimo de 85%), da valorização (inclui reciclagem, reutilização e valorização energética a um nível mínimo de 95%) e da deposição em aterro (a um nível máximo de 5%). É comummente aceite que tais metas só serão alcançáveis com o desenvolvimento de novas tecnologias de separação e reciclagem de resíduos de fragmentação ou, alternativamente, maiores índices de desmantelamento de componentes. Centrando-se na aposta de uma desmontagem mais extensa de veículos, foi levada a cabo uma experiência de campo numa unidade empresarial de receção e desmantelamento de VFV, acreditada pela Valorcar - CaetanoLyrsa, S.A. - de maneira a possibilitar a compreensão das práticas envolvidas no processo de desmantelamento e, por conseguinte, a seleção e realização de ensaios de remoção de alguns componentes adicionais. Levando em consideração uma avaliação do processo de desmantelamento, verificou-se que existe um potencial de reciclagem/valorização adicional de 10% (base mássica) através de mão-de-obra e alguns recursos energéticos adicionais. De maneira a avaliar impactes ambientais de diferentes opções, foi feita uma avaliação comparada de três estratégias de gestão destes resíduos VFV selecionados: (i) cenário 1 tem como referência a situação atual do destino dos resíduos em estudo, i.e., o envio para o processo de fragmentação no qual existe recuperação de certos metais ferrosos e não ferrosos e envio da fração restante, denominada Resíduos de Fragmentação Automóvel (RFA) para aterro; (ii) cenário 2 considera, ao invés da deposição em aterro, a incineração com recuperação de energia e (iii) cenário 3 inclui o desmantelamento adicional dos componentes para reciclagem de certos materiais e, para os que não possuem valor comercial (p. ex. têxteis, plásticos, borracha, etc.), considerou-se o seu tratamento e processamento para produção de CSR e sua aplicação na indústria cimenteira. Métodos A fim de comparar e avaliar o desempenho ambiental dos três cenários de gestão de VFV analisados, a metodologia de Avaliação do Ciclo de Vida (ACV) foi aplicada, recorrendo-se à base de dados EcoInvent e ao método CML 2001. Resultados e discussão No cenário 1, em comparação com os outros dois cenários, não foi observado qualquer benefício para as categorias de impacte de aquecimento global e eutrofização. No cenário 2, em que é considerado o tratamento térmico em incinerador dos RFA, verificam-se créditos ambientais devidos à reciclagem dos metais ferrosos e não ferrosos e aos benefícios da recuperação de energia, embora seja demonstrado que este cenário tem um impacto significativo sobre o aquecimento global devido às emissões provenientes da oxidação térmica dos materiais poliméricos existentes na fração de RFA. A melhoria do desempenho ambiental parece ser assegurada pelo cenário 3, que inclui o desmantelamento adicional de componentes para a reciclagem, produção de CSR e encaminhamento destes, como combustíveis substitutos, para a indústria cimenteira. Conclusões A desmontagem mais extensa de veículos contribuirá, não apenas para um processo geral ambientalmente mais correto em relação às práticas atuais, mas também para atingir as metas europeias de reciclagem e valorização de VFV. O aumento do desmantelamento, além de ter como principal vantagem a poupança de matérias-primas virgens, também apresenta vantagens a nível social e económico, uma vez que cria postos de trabalho diretos e indiretos.
Background and purpose In Portugal the management of End-of-Life Vehicles (ELV) is set out by goals and targets of EU policy for the year 2015, including in particular the recycling (minimum of 85%), recovery (including recycling, reuse and energy recovery to a minimum of 95%) and landfill disposal (maximum of 5%). It is commonly accepted that these goals will be attained only through the development of new technologies for waste separation and recycling of shredder residues or, alternatively, higher rates of dismantling components. Focusing in a more extended dismantling of ELV, a field experience was carried out in a dismantling plant, accredited by Valorcar - CaetanoLyrsa, SA - in order to understand the practices involved in the dismantling process for further selection and dismantling of some additional components. Taking into account an evaluation of the dismantling process, it was found that it has a potential for additional recycling/recovery of 10% (mass basis) against human labor and some energy resource. In order to evaluate environmentally the different options, a comparison was done among three management scenarios for these ELV wastes: (i) scenario 1 is the baseline and refers to the actual management of these wastes, i.e., send to shredding process where some ferrous and non-ferrous metals are recovered and remaining fraction, so called Automotive Shredder Residues (ASR), is landfilled; (ii) scenario 2, the ASR fraction is incinerated, with energy recover, instead landfilled and (iii) scenario 3 includes the dismantling of components for recycling a fraction and for those who have no commercial value (e.g. textiles, plastics, rubbers, etc.), it was considered their treatment and processing to produce Solid Recovered Fuel (SRF) and its application in the cement industry. Methods In order to compare and evaluate the environmental performance of the three ELV management scenarios, the methodology of Life Cycle Assessment (LCA) was applied, using the EcoInvent database and the CML 2001 procedure. Results and discussion In scenario 1 no benefit for the impact categories of global warming and eutrophication is observed in comparison with the other two scenarios. In scenario 2, which is considered the ASR thermal treatment in incinerator, there are environmental credits due the recycling of ferrous and non-ferrous metals and benefits from energy recovery, although it is shown that this scenario has a significant impact on the global warming due to emissions from thermal oxidation of polymeric materials presented in ASR fraction. A net environmental performance upgrading seems to be ensured by scenario 3, which includes the supplementary dismantling of components for recycling and CSR production and its burning in the cement industry. Conclusions An extended dismantling of vehicles not only contributes with environmental benefits but also allows attaining the European recovery and recycling targets for ELV. The increase of dismantling costs can be compensated by additional recycling material revenues as well as an increase of employment.
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Franzini, Filho Carlos Roberto. "Proposição de um framework para a implementação do processo de logística reversa para veículos em final de vida no Brasil". Universidade Nove de Julho, 2015. http://bibliotecadigital.uninove.br/handle/tede/1372.
Testo completoAbstract (sommario):
Submitted by Nadir Basilio (nadirsb@uninove.br) on 2016-06-01T19:06:09Z
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Carlos Roberto Franzini Filho.pdf: 953434 bytes, checksum: ad55f7d0771d38a54591c6a4aa6da6b2 (MD5)Made available in DSpace on 2016-06-01T19:06:09Z (GMT). No. of bitstreams: 1 Carlos Roberto Franzini Filho.pdf: 953434 bytes, checksum: ad55f7d0771d38a54591c6a4aa6da6b2 (MD5) Previous issue date: 2015-03-31
Currently in Brazil and the worldwide, the "end of life vehicles" (ELV) has been considered as a serious problem to environment. It is considered as an ELV the vehicle that concluded his life cycle or vehicle damaged due accidents. Unlike countries where recovery ELV happens because of specific ELV laws, recovery of ELV parts in Brazil has been guided by profit in reason of the possibility to reselling parts with highest market value after the first phase of use. The aim of this study was to identify what are necessary steps to propose a framework to implementation of reverse logistics process to ELVs in Brazil. The methodology used to achieve the aim was a theoretical / conceptual research from bibliometric review of the literature available in five databases (CAPES, EBSCO, PROQUEST, SCIENCE DIRECT, GOOGLE ACADÊMICO) and documentary research in Unions and class Associations. A content analysis from collected data allowed the identification of the main aspects and activities related to reverse logistics to ELV. Considering the current scenario for ELVs in Brazil and the data obtained from the literature during the content analysis, a framework was proposed with the required steps to implement the reverse logistics to ELV in Brazil. In reason of a theoretical study, there are limitations because of the different realities from researched countries: changing regulatory, social structures, political systems, laws, economic systems and also the level of development from the country.
Atualmente no Brasil e no mundo, os “Veículos em Final de Vida” (VFV) têm sido um grande problema para o meio ambiente. É considerado como VFV o veículo que chegou ao final de seu ciclo de vida útil ou o veículo que teve o seu ciclo de vida útil interrompido prematuramente em razão de acidentes. Diferentemente dos países onde a recuperação de VFV acontece em razão de obrigações legais especificas, no Brasil a recuperação das peças constituintes dos VFV têm sido impulsionada pela possibilidade de obtenção de lucro com a revenda destas peças para reuso, remanufatura ou reciclagem. Neste contexto, o presente trabalho tem como objetivo propor um framework com as etapas necessárias para a implementação do processo de logística reversa para VFV no Brasil. A metodologia utilizada para atingir o objetivo proposto foi uma pesquisa teórico/conceitual a partir de revisão bibliométrica da literatura em cinco bases de dados disponíveis (CAPES, EBSCO, PROQUEST, SCIENCE DIRECT, GOOGLE ACADÊMICO) e uma pesquisa documental em órgãos de classe do setor automotivo. Uma análise de conteúdo feita nos dados coletados permitiu a identificação dos principais aspectos e atividades relacionadas ao processo de logística reversa para VFV. Foram apresentados os principais estimuladores e barreiras identificadas na literatura para a implementação da logística reversa para VFV. Considerando o atual cenário para VFV no Brasil e as os dados apurados na literatura durante a análise de conteúdo, foi proposto um framework com as etapas necessárias para a implementação do processo de logística reversa para VFV no Brasil. Por tratar-se de um estudo teórico, as limitações deste estudo se devem ao fato das diferentes realidades entre os países pesquisados: diferentes regulamentações governamentais, estruturas sociais, sistemas políticos, sistemas econômicos e também o nível de desenvolvimento do país.
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Patin, Nicolas. "Analyse d'architectures, modélisation et commmande de générateurs pour réseaux autonomes". Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2007. http://tel.archives-ouvertes.fr/tel-00204509.
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Cette thèse traite de solutions innovantes pour la génération d'énergie électrique dans les avions : elles s'appuient sur des architectures autonomes utilisant des machines telles que la machine asynchrone à double alimentation (MADA) et la machine synchrone à double excitation (MSDE) suivant le format électrique envisagé (courants alternatifs à fréquence fixe ou variable ou encore courant continu)
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Leite, Anita Nunes. "Avaliação do ciclo de vida da eliminação de um airbag : comparação entre dois cenários". Master's thesis, 2016. http://hdl.handle.net/10316/36911.
Testo completoAbstract (sommario):
Dissertação para a obtenção do grau de Mestre em Engenharia do Ambiente na Especialidade de Tecnologia e Gestão do Ambiente, Faculdade de Ciências e Tecnologia da Universidade de Coimbra.A crescente inquietude relacionada com a gestão de Veículos em Fim de Vida (VFV) tem motivado a realização de estudos que proporcionem a constante inovação e utilização de métodos/processos ambientalmente sustentáveis na gestão de resíduos. Segundo a Diretiva 2000/53/CE do Parlamento Europeu e do Conselho, de 18 de setembro de 2000, relativa aos veículos em fim de vida, é referido que medidas destinadas a prevenir e limitar os resíduos resultantes dos veículos em fim de vida (VFV) e dos seus componentes devem de ser tomadas. Assegura ainda que, sempre que possível, eles sejam reutilizados, reciclados ou valorizados. Este estudo centra-se na comparação entre duas vias de eliminação de airbags: uma atualmente em prática – disparo de airbags a céu aberto e outra que consiste na queima dos airbags em forno estático com posterior tratamento dos gases. Tem por objetivo priorar o melhor método de eliminação de airbags ao nível ambiental. A metodologia utilizada consiste na Análise do Ciclo de Vida (ACV) que será aplicada através do software SimaPro, a partir do qual podemos chegar a conclusões relativamente ao processo de eliminação que apresenta menor impacte ambiental. A ACV será apenas aplicada à fase de eliminação do airbag, excluindo todos os processos efetuados anteriormente (extração de matérias-primas, produção, transporte e utilização). As categorias de impacte ambiental escolhidas são: Depleção de Recursos Abióticos, Acidificação, Eutrofização, Aquecimento Global (GWP 100), Depleção da camada de Ozono, Formação de Oxidantes Fotoquímicos pelo método CML e Toxicidade Humana, cancro; Toxicidade Humana, não-cancro; Ecotoxicidade pelo método Usetox. Devido à escassez de dados relativos ao tipo de partículas originárias do disparo de um airbag, foi realizado um ensaio experimental. Este ensaio consistiu no disparo de um airbag dentro de um tambor de polietileno de alta densidade (HDPE) com um volume de 60L. A recolha das partículas provenientes do disparo foi efetuada por lavagem utilizando água destilada. Assim, foi possível apurar a massa de partículas por disparo, a sua composição química, morfologia e estrutura posteriormente determinada através de microscopia eletrónica de varrimento (SEM) e difração de raios X. As partículas emitidas no cenário 1 apresentam uma forma acicular, sem organização estrutural, com elevado número de óxidos na sua composição. Os elementos maioritariamente encontrados foram o ferro, o zinco e o cobre. Estes metais, dependendo da sua concentração, provocam diversas patologias nos seres vivos e impactes nos ecossistemas. Neste trabalho foram identificados os impactes ambientais adjacentes a duas vias de eliminação de airbags. O cenário 2 no geral apresenta valores superiores comparativamente ao cenário 1, exceto nas categorias de Toxicidade Humana, não-cancro e Ecotoxicidade. Para além de proporcionar uma ferramenta de decisão, este estudo pode também contribuir para o conhecimento público da composição dos gases e partículas que são emitidos no disparo de um airbag.
The growing concern related to the management of End of Life Vehicles (ELV) has motivated studies that provide constant innovation and use of methods/processes environmentally sustainable in waste management. According to Directive 2000/53 / EC of the European Parliament and of the Council of 18 September 2000 concerning on end of life vehicles, it is stated that measures to prevent and limit waste resulting from end of life vehicles (ELV ) and its components must be taken. It also ensures that, wherever possible, they are reused, recycled or recovered. The methodology used is the Life Cycle Assessment (LCA) which will be implemented through the SimaPro software. We can take conclusions about the method that has the least environmental impact. LCA will be applied only to the elimination phase of airbag excluding all proceedings that occur before (raw materials extraction, production, transport and use). The categories that were chosen are: Abiotic Depletion, Acidification, Eutrophication, Global Warming (GWP 100), Ozone Layer Depletion, Photochemical Oxidation by CML method and Human Toxicity, cancer; Human toxicity, non-cancer; Ecotoxicity by Usetox. Due to the lack of data on the type of particles originated from an airbag deployment was performed an experimental test. This test consisted in shooting an airbag inside of a high density polyethylene (HDPE) drum with a volume of 60L. The particles were collected by washing using distilled water. So it was possible to calculate the mass of particles originated from the airbag’s deployment, its chemical composition, morphology and structure using scanning electron microscope (SEM) and diffraction of X-rays. The particles emitted in scenario 1 have a needle shaped form without structural organization with a high number of oxides in its composition. The elements founded were mainly iron, zinc and copper. These metals, depending on their concentration, cause various diseases in living beings and impacts on ecosystems. In this work the environmental impacts originated from two ways of eliminating airbags are identified. Scenario 2 in general has higher values compared to scenario 1, except in the categories of Human toxicity, non-cancer and ecotoxicity. Apart from providing a decision tool can also contribute to the public understanding of the composition of the gases and particles that are emitted in the deployment of an airbag
Libri sul tema "VFVG"
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Germany), VFMG-Sommertagung (1998 Herborn. Geologie und hydrothermale Mineralisationen im rechtsrheinischen Schiefergebirge: Tagungsband zur VFMG-Sommertagung 1998 in Herborn (Lahn-Dill-Kreis). Wiesbaden: Nassauischer Verein für Naturkunde, 1998.
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Nationale Raad voor de Volksgezondheid (Netherlands) e Vereniging voor Filosofie en Geneeskunde., a cura di. Bereidheid tot bezinning: Beschouwingen naar aanleiding van het rapport van de Nationale Raad voor de Volksgezondheid (NRV) "Grenzen van de zorg" ; een commentaar van de Werkgroep Ethiek van de Vereniging voor Filosofie en Geneeskunde (VFG). Nijmegen: Vereniging voor Filosofie en Geneeskunde, 1989.
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Foner, Eric. Give Me Liberty V1 W/Vfv1. Norton & Company, Incorporated, W. W., 2004.
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Foner, Eric. Give Me Liberty V2 W/Vfv2. Norton & Company, Incorporated, W. W., 2004.
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The Selection vfg. 2000. Schwabe, 2001.
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The Selection vfg. 2001. Schwabe, 2002.
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Foner, Eric. Give Me Liberty V1 W/Vfv1+Nahd. Norton & Company, Incorporated, W. W., 2004.
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Praxiskommentar Kostenrecht - RATG, AHK, ZPO, AußStrG, ASGG, EO, VwGVG, VwGG, VfGG und GebAG. Verlag Österreich, 2020. http://dx.doi.org/10.33196/9783704685407.
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Ltd, ICON Group. VFG PLC: Labor Productivity Benchmarks and International Gap Analysis (Labor Productivity Series). 2a ed. Icon Group International, Inc., 2000.
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Ltd, ICON Group. VFG PLC: International Competitive Benchmarks and Financial Gap Analysis (Financial Performance Series). 2a ed. Icon Group International, Inc., 2000.
Cerca il testo completoCapitoli di libri sul tema "VFVG"
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Verschut, C., T. D. Tno-Me e V. Brethouwer. "Composting of a Mixture of VFG Waste and used Paper Diapers". In The Science of Composting, 612–26. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1569-5_59.
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Cowan, Michael. "The Skeptical Community : Left-Wing Film Societies and the Making of the Suspicious Spectator". In Film Societies in Germany and Austria 1910–1933. Nieuwe Prinsengracht 89 1018 VR Amsterdam Nederland: Amsterdam University Press, 2023. http://dx.doi.org/10.5117/9789463725477_ch04.
Testo completoAbstract (sommario):
This chapter examines the best-known German film society, the socialist Volksfilmverband (People’s Film Association, VFV, founded in 1928) in the context of agitational culture in the turbulent years of the late Weimar Republic. The chapter argues that the VFV—which arose simultaneously with analogous left-wing film societies in London, Paris, Amsterdam, New York and other cities—was the first to solidify a pervasive view of cinema as “mass medium,” understood in terms of its ability to impact the social and political outlook of the masses. Under this rubric, the chapter examines the ways this group sought to inculcate a habitus of suspicion among the cinema-going public (which would resist film’s seductive power), as well as the group’s links to other left-wing institutions, particularly in journalism.
Atti di convegni sul tema "VFVG"
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Sivebaek, Ion M., Spencer C. Sorenson e Joergen Jakobsen. "Dimethyl Ether (DME) - Assessment of Viscosity Using the New Volatile Fuel Viscometer (VFVM)". In International Spring Fuels & Lubricants Meeting. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-01-2013.
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Hashida, Koichi, e Masato Yoshino. "The “Variable Flow Valve” (VFV) for Electronically Controlled Hydraulic Systems". In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1994. http://dx.doi.org/10.4271/940835.
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Trokhaniak, Viktor, Semjons Ivanovs, Yuri Nasieka, Oleh Chernysh, Aivars Aboltins, Yevhen Ihnatiev e Oleksandr Synyavskiy. "Usage of CFD for research on lateral ventilation system in poultry house". In 22nd International Scientific Conference Engineering for Rural Development. Latvia University of Life Sciences and Technologies, Faculty of Engineering, 2023. http://dx.doi.org/10.22616/erdev.2023.22.tf120.
Testo completoAbstract (sommario):
Maintaining normalized microclimate in poultry farming is one of the basic factors. It is the quality indicators of the air parameters that ultimately determine the quality of the final product. Keeping poultry requires a lot of effort and technological solutions. In this regard the authors have made improvements of the microclimate system in the air environment of the poultry house by installing exhaust fans on the side wall, in a total of 8 pcs, and 2 pcs. on the end wall. A powerful tool for predicting the airflow patterns in the poultry house is modelling. An alternative to experimental studies is Computational Fluid Dynamics (CFD) with ANSYS Fluent. The CFD model was performed on the Navier-Stokes equations for convective flows. The calculations used the Spalart-Allmaras turbulence model and the Discrete Ordinates radiation model. CFD modeling was performed at an air flow rate of 21.5 kg·s-1. The outside air temperature is assumed to be 2 °C and the thermal radiation parameter is entered. In poultry houses, the poultry, when kept on the floor, is a source of heat and is + 41 °C. Heating system is not provided. To remove air, exhaust fans of the Munters EM50 1.5Hp type are used. Fans are mounted on the side wall in the amount of 4 units. and 1 on the end wall. Supply valves Wlotpowietrza 3000-VFG with a total of 80 pcs. Above the valves there are built-in spoilers at an angle of inclination from the vertical 75°. The results of the CFD modelling showed that the valves, located at a height of 210 mm from the ceiling, work efficiently. The pressure drop at the supply valves is 73.565 Pa. The air speed at the inlet of the supply valves is 11.45 m·s-1. The air speed at a height of 0.7 m from the floor level varies within 0.86 m·s-1, the temperature is 14.12 °C.
Rapporti di organizzazioni sul tema "VFVG"
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Bolotnikov, Aleksey E., Ralph B. James, Y. Cui, G. De Geronimo, E. Vernon, G. S. Camarda, A. Hossain, G. Yang, J. Indusi e Brian Boyer. High-Efficiency CdZnTe Position-Sensitive VFG Gamma-Ray Detectors for Safeguards Applications. Office of Scientific and Technical Information (OSTI), settembre 2015. http://dx.doi.org/10.2172/1328361.
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Bolotnikov, A. Position-sensitive virtual Frisch-grid (VFG) Gamma Ray Detectors for Safeguard Applications. Office of Scientific and Technical Information (OSTI), gennaio 2017. http://dx.doi.org/10.2172/1349555.
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Bolotnikov, Aleksey. High-Efficiency CdZnTe Postion-Sensitive VFG Gamma-Ray Detectors for Safeguards Applications. Office of Scientific and Technical Information (OSTI), dicembre 2018. http://dx.doi.org/10.2172/1562474.
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Bolotnikov, Aleksey. High-Efficiency CdZnTe Postion-Sensitive VFG Gamma-Ray Detectors for Safeguards Applications. Office of Scientific and Technical Information (OSTI), dicembre 2018. http://dx.doi.org/10.2172/2282046.
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Bolotnikov, Aleksey, Yonggang Cui, Emerson Vernon e Gianluigi De Geronimo. Upgrading FLIR NanoRaider with the next Generation of CdZnTe Detectors. Goal - Integrate VFG detectors into FLIR R200. Advanced Virtual Grid ASIC (AVG-ASIC). Office of Scientific and Technical Information (OSTI), giugno 2016. http://dx.doi.org/10.2172/1338589.
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