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Journal articles on the topic "658.589:620.9"

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Bae, Ki Nam, Hye Ryun Kim, Young-Jun Rhie, Kee-Hyoung Lee, and Hyo-Kyoung Nam. "Daily sitting time associated with the risk of metabolic syndrome in Korean adolescents." Journal of Pediatric Endocrinology and Metabolism 31, no. 1 (January 26, 2018): 63–69. http://dx.doi.org/10.1515/jpem-2017-0110.

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AbstractBackground:This study aimed to investigate the relationship between daily sitting time and the risk of metabolic syndrome in Korean adolescents.Methods:Data from 486 adolescents aged 12–18 years were obtained from national surveys. Daily sitting time was measured using questionnaires and divided into three intervals: <8 h; 8–12 h; and ≥12 h.Results:The mean daily sitting time and prevalence of positive metabolic components were 620.9±9.9 min/day and 45.5±2.7%, respectively. In a multivariate logistic regression analysis, adolescents who sat longer were more likely to have metabolic components (p<0.05), independent of age, sex, area of residence, sleeping time and body mass index.Conclusions:Longer daily sitting time appears to be associated with an increased risk of metabolic syndrome in adolescents. These findings highlight the need to focus on reducing sitting time for all adolescents, not just for those at risk of obesity.
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Melville, Bethany, Arko Lucieer, and Jagannath Aryal. "Classification of Lowland Native Grassland Communities Using Hyperspectral Unmanned Aircraft System (UAS) Imagery in the Tasmanian Midlands." Drones 3, no. 1 (January 5, 2019): 5. http://dx.doi.org/10.3390/drones3010005.

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This paper presents the results of a study undertaken to classify lowland native grassland communities in the Tasmanian Midlands region. Data was collected using the 20 band hyperspectral snapshot PhotonFocus sensor mounted on an unmanned aerial vehicle. The spectral range of the sensor is 600 to 875 nm. Four vegetation classes were identified for analysis including Themeda triandra grassland, Wilsonia rotundifolia, Danthonia/Poa grassland, and Acacia dealbata. In addition to the hyperspectral UAS dataset, a Digital Surface Model (DSM) was derived using a structure-from-motion (SfM). Classification was undertaken using an object-based Random Forest (RF) classification model. Variable importance measures from the training model indicated that the DSM was the most significant variable. Key spectral variables included bands two (620.9 nm), four (651.1 nm), and 11 (763.2 nm) from the hyperspectral UAS imagery. Classification validation was performed using both the reference segments and the two transects. For the reference object validation, mean accuracies were between 70% and 72%. Classification accuracies based on the validation transects achieved a maximum overall classification accuracy of 93.
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Mardhiana, Hawwin, Dina Rachmawati, Familia Dwi Winati, and Achmad Zaki Yamani. "Implementation of Quality Function Deployment (QFD) for Decision Making in Improving Integrated Academic Information System." INTENSIF: Jurnal Ilmiah Penelitian dan Penerapan Teknologi Sistem Informasi 6, no. 1 (February 11, 2022): 92–107. http://dx.doi.org/10.29407/intensif.v6i1.16790.

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Academic Information System is a tool to support academic activities in implementing education in institutions effectively and efficiently. Institut Teknologi Telkom Surabaya is an institution that already has an integrated academic information system called I-Gracias. I-Gracias uses a single-user system for all applications. Most users of I-Gracias are students, so student satisfaction with integrated academic information system services can be used as benchmarks in determining I-Gracias improvement plans. One method used for the I-Gracias improvement process is the Quality Function Deployment (QFD) method. This method determines the student's desire for I-Gracias using the House of Quality (HOQ) matrix. The result of this research is that the QFD method can prioritize technical responses to the main obstacles for students in using I-Gracias by correlating Voice of Consumer (VOC) and technical response. The highest priority for technical response is coordinating with other units with a technical importance rating of 620.9 and a relative weight value of 21%. Next is to update the module regularly, socialize i-Gracias, meet management targets, receive criticism and suggestions, carry out regular checks and recruit HR if needed as a sequence of improvements to i-Gracias.
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Gurda, Safet, Neđad Bašić, Dževada Sokolović, Jelena Knežević, Seid Hajdarević, and Ševal Delić. "ANALYSIS OF BIOMASS UTILISATION OF ABOVEGROUND PART OF BEECH (FAGUS SYLVATICA L.) IN COMPARTMENT 92, MU ,,ŽUĆA – RIBNICA“." Radovi Šumarskog fakulteta Univerziteta u Sarajevu 48, no. 1 (June 1, 2018): 20–45. http://dx.doi.org/10.54652/rsf.2018.v48.i1.50.

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630*8:620.95(497.6 Kakanj) 620.9:582.632.2(497.6 Kakanj) Biomass has a huge renewable energy source potential, forest biomass in particular. Forest biomass effectively includes aboveground parts of tree trunk including: stem, treetop with leaves/needles, bark, seeds, and cones. Although it is biomass, stump is not used in natural forests. Beech (Fagus sylvatica L.) is a dominant tree in the forests of Bosnia and Herzegovina and it is important raw material used in wood assortment production. Once beech assortment is cut down, processing and hauled there is a significant quantity of unused wood biomass which can be effectively used as source of renewable energy. This is way the objective of this paper was to determine overall quantity of beech tree biomass in Compartment 92, Subcompartment „a”, MU „Žuća-Ribnica“, assess quantity of forest biomass (usable timber left after felling and branches - biomass above 7 cm), determine quantity of forest biomass (wood biomass from 3 to 7 cm), and also quantity of bark. The research included 60 beech trees. Volume of tree trunk and trunk bark was determined by sectioning method and branch mass was determined by weighting. Adjusted values of tree trunk and bark volumes were converted in dry matter mass using information provided by. The research findings showed that 73% (1,605.24 tons) of beech wood biomass is used in Compartment 92, Subcompartment „a”, MU „Žuća-Ribnica“, while 27% (582.59 tons) remain unused in the forest. This altogether indicates that a large portion of beech biomass is not used as energy source.
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Mann, K., J. Rendl, R. Busley, B. Sailer, S. Seybold, R. Hoermann, T. Sauerbruch, and W. Börner. "Systemic iodine absorption during endoscopic application of radiographic contrast agents for endoscopic retrograde cholangiopancreaticography." European Journal of Endocrinology 130, no. 5 (May 1994): 498–501. http://dx.doi.org/10.1530/eje.0.1300498.

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Mann K, Rendl J, Busley R, Sailer B, Seybold S, Hoermann R, Sauerbruch T, Börner W. Systemic iodine absorption during endoscopic application of radiographic contrast agents for endoscopic retrograde cholangiopancreaticography. Eur J Endocrinol 1994;130:498–501. ISSN 0804–4643 Hyperthyroidism induced by contrast agents is a major problem in patients with pre-existing thyroid disease, particularly in patients with functional thyroid autonomy. The present study was undertaken to evaluate whether contrast media applied during endoscopic retrograde cholangiopancreaticography (ERCP) may result in a significant increase of serum iodine levels and thus may be associated with the risk of iodine-induced hyperthyroidism. The courses of serum concentrations of total iodine and free iodide, as well as of urinary iodine excretion, were measured in 15 patients before and up to 21 days after ERCP. During ERCP, the non-ionic contrast medium iopamidol was instilled in amounts resulting in a total iodine load of 57.4 ± 22.8 mmol (7.3 ± 2.9 g). In all patients, ERCP resulted in a highly significant increase in serum levels of total iodine from 0.8±0.5 to 85.2 ± 116.9 μmol/l 4 h after application of the contrast agent. In parallel, serum iodide levels were raised from 0.06 ± 0.04 to 5.42 ± 6.09 μmol/l and urinary iodine excretion from 71.1 ± 35.7 μmol/mol creatinine to 621 620.9 ± 636 492.2 μmol/mol creatinine. Peak concentrations of serum iodine are well related to the total amount of iodine applied (p < 0.05). During follow-up, iodine levels returned to preexposure levels within 2–3 weeks. Levels of thyrotropin, free thyroxine, and free triiodothyronine remained unchanged during the follow-up period. In conclusion, endoscopic application of iodinated contrast agents during ERCP leads to significant increases of serum levels of total iodine and free iodide and of urinary iodine excretion. Therefore, patients with underlying thyroid disease may be at risk to develop iodine-induced hyperthyroidism. Klaus Mann, Dept. of Internal Medicine II. Klinikum Grosshadern, Marchionistr. 15, 81377 Munich, Germany
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Nikolaev, Semen. "PSI-B-29 Breeding influence on dairy productivity of Kholmogory cattle." Journal of Animal Science 99, Supplement_3 (October 8, 2021): 226–27. http://dx.doi.org/10.1093/jas/skab235.413.

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Abstract The Kholmogory breed of cattle is highly adapted to poor feeding and severe climate conditions of the northern part of European Russia, but a lack of dairy productivity also characterizes it. The study aims to measure the productivity of animals obtained by breeding Kholmogory and Holsteins cattle. Purebred Kholmogory (K1, n = 497), first generation` (K1/2×H1/2, n = 387), and second generation` (K1/4×H3/4, n = 384) hybrids were selected for the analysis. Dairy production for 305 days throughout 1st and 3rd lactations and also lifetime productivity were measured. Statistical processing was conducted using Statistica 10 software. The average milk yield of purebred` 1st lactation was 3501±35 kg with a fat content of 3.66±0.01%. The productivity of hybrids in the 1st lactation was higher by 728 kg (P &lt; 0.001) with a fat content of 3.86±0.02% for K1/2×H1/2 and by 1030 kg (P &lt; 0.001) with a fat content of 4.13±0.02 for the K1/4×H3/4 population. In the 3rd lactation, the productivity of K1 was 3948±51 kg of milk with a 3.73±0.02% of fat. This is 941 kg (P &lt; 0.001) and 0.31% (P &lt; 0.001) less than in K1/2×H1/2. During the same lactation in K1/4×H3/4, the average amount of milk was 5508±77 kg with 4.25±0.04% of fat. The maximum lifetime productivity was obtained from K1/2×H1/2. It made 19850±618 kg of milk and 799.6±25.3 kg of milk fat. In the K1 group, 14642±529 kg of milk and 552.6±20.3 kg of fat were obtained per life, and for K1/4×H3/4 14832±590 kg and 620.9±25.6 kg were obtained. The heterosis effect could explain the high lifetime productivity of first-generation hybrids. This is consistent because the average economic use of K1 animals was 3.53±0.11 calving, while for K1/2×H1/2, it was 4.01±0.11. Further breeding with the Holstein led to a significant decrease in the economical use duration to 2.78±0.09 calving in K1/4×H3/4.
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Eisfeld, Ann-Kathrin, Mark Westerman, Rainer Krahl, Sabine Leiblein, Uwe Gerd Liebert, Marianne Hehme, Dietger Niederwieser, and Haifa Kathrin Al-Ali. "Elevated Serum Hepcidin in Patients with AML Prior to and After Allogeneic Hematopoietic Cell Transplantation Does Not Correlate with Transfusional Body Iron, HFE Genotype or Graft Versus Host Disease and May Protect From Excessive Parenchymal Iron Loading." Blood 114, no. 22 (November 20, 2009): 4047. http://dx.doi.org/10.1182/blood.v114.22.4047.4047.

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Abstract Abstract 4047 Poster Board III-982 Hepcidin (hep), a 25-amino-acid peptide, is the central regulator of iron homeostasis. Its transcription is upregulated by inflammatory cytokines and iron and is downregulated by iron deficiency, ineffective erythropoiesis, and hypoxia. Also HFE gene mutations are associated with less liver hepcidin messenger RNA. Both inherited (HFE genotype) and treatment-related factors influencing hep expression in patients (pts) with AML prior to and after allogeneic hematopoietic cell transplantation (HCT) as blood transfusions (BT), body iron and anemia were studied. The impact of chemotherapy, conditioning regimen, and Graft versus Host Disease (GvHD) on serum hep was analysed. Patients and methods 42 consecutive pts (23 male/19 female, median age 57 [range:18-70] years) with AML who underwent allogeneic HCT from February, 2008 - February, 2009 at the University of Leipzig were included. Each patient was assessed 10 days prior to and at a median of 3 (range: 3-5) months after HCT. Donors were matched related in 8 (19%) and matched unrelated (MUD) in 34 (81%) pts. Preparative regimen consisted of 12 Gy TBI/cyclophosphamid 120 mg/kg (ATG was included for unrelated HCT) in 13 (31%) and fludarabin 30 mg/m2/day for 3 days/2 Gy TBI) in 29 (69%) pts. Acute GvHD > grade II was present in 13 (31%) and chronic GvHD in 17 (40%) pts. HFE genotype prior to and after HCT was assessed by PCR technique. Body iron was assessed by serum ferritin (sf) (normal values < 400ng/mL). Serum hep was measured by hepcidin C-ELISA at Intrinsic LifeSciences LLC, La Jolla, CA.(normal values: male 29-254 ng/mL, female: 17-286 ng/mL). Hep levels of 21 age-and gender-matched healthy volunteers (6 m/15 f, median age 57 years) were used as a control. Results Median serum hep was much higher in pts both prior to [median 358 (range:56-1096) ng/ml] and after HCT [median 398 (range:172-941) ng/ml] compared with the control group [median 52 (range:8.3-131) ng/ml] (p<0.0001). Age and gender had no influence on hep values. Similarly, liver function, interval between diagnosis and HCT, number of chemotherapies, conditioning regimen, antibiotic- or antifungal-treatments had no impact on hep level. Iron overload was already seen in all pts prior to HCT with a median sf of 1945 (range: 617-6981) ng/mL after a median number of 22 units BT. Although after HCT the number of BT mounted to a median of 30 units (p<0.0001), sf with a median of 2260 ng/mL remained elevated comparable to the level prior to HCT. Lower hep levels significantly correlated with fewer BT (p=0.001), but surprisingly not with sf values. Hep correlated inversely with the degree of anemia (p=0.002). Mutations in the HFE gene were found in 19 (46%) pts prior to HCT (heterozygosity (het) for H63D, n=11, het C282Y, n=3, het S65C, n=1, and homozygosity (homo) for H63D, n=4) and in 15 (37.5%) pts after HCT reflecting donor genotype (het for H63D,n=12, het C282Y, n=1, compound-het, n=1). Mutations in the HFE gene were not associated with lower hep levels. After HCT, 19 (45%) pts showed a decline in hep level of 155 (range: 394.8-9.5) ng/ml and 23 (55%) pts had an increase in hep levels of 138 (range: 43.3- 620.9) ng/ml compared with pre-transplantaion levels. None of the above mentioned parameters could predict or correlate with these changes in serum hep. Iron overload prior to HCT strongly correlated with later extensive chronic GvHD (p=0.003) and tended to correlate with limited GvHD (p=0.06). On the other hand, hep levels at any time point did not correlate with acute or later chronic GvHD. Conclusions Serum hepcidin is highly elevated in pts with AML prior to as well as after allogeneic HCT compared with healthy controls mainly because of frequent blood transfusions leading to elevated iron stores. This suggests that hepcidin synthesis and upregulation remain intact despite intensive chemotherapy and HCT. Hepcidin normally binds to ferroportin, leading to intracellular retention of iron in macrophages and to a reduction of extracellular serum iron. This may explain why serum hepcidin correlates with blood transfusions but not with serum ferritin values. Actually, overexpression of hepcidin may play an important protective role in this setting as it may prevent an increased ferroportin-mediated iron export from macrophages thereby reducing the severity of parenchymal iron loading and damage. Disclosures: Westerman: INTRINSIC LIFESCIENCES LLC: Consultancy, Employment, Equity Ownership. Hehme:Novartis: Employment. Niederwieser:Novartis: Speakers Bureau. Al-Ali:Novartis: Research Funding.
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D'Alimonte, Mary, Devika Deshmukh, Anuja Jayaraman, Sheila Chanani, and Debbie Humphries. "Exploring behaviors related to positive growth in an urban slum of Mumbai (620.9)." FASEB Journal 28, S1 (April 2014). http://dx.doi.org/10.1096/fasebj.28.1_supplement.620.9.

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Kuras, Zerrin, Vladimir Kucher, Lisa Neumeier, Kelsey Dillehay, and Laura Conforti. "Selective downregulation of human Kv1.3 channels by PKA I." FASEB Journal 24, S1 (April 2010). http://dx.doi.org/10.1096/fasebj.24.1_supplement.620.9.

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Beyero, Mesfin, Kathryn Reider, and Yared Mekonnen. "Effect of timed and targeted counseling (ttC) by peer mothers in changing infant and young child feeding practices among mothers of children 0 to 18 months in four districts in Southern Ethiopia." FASEB Journal 27, S1 (April 2013). http://dx.doi.org/10.1096/fasebj.27.1_supplement.620.9.

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Dissertations / Theses on the topic "658.589:620.9"

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Ronchi, Renata Peterle. "Avaliação da eficiência do ultrassom no processo de separação de fases em água produzida e em emulsões sintéticas do tipo O/A." reponame:Repositório Institucional da UFES, 2014. http://repositorio.ufes.br/handle/10/1875.

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Um grande problema das indústrias petrolíferas está relacionado ao desenvolvimento de tecnologias eficazes para o tratamento da água produzida proveniente da etapa de processamento primário, apresentando-se como emulsões estáveis do tipo óleo/água. Este estudo descreve uma metodologia de síntese de emulsões do tipo óleo em água, e aplica testes com ultrassom, para avaliar a capacidade desta técnica em propor uma separação de fases e consequente redução do Teor de Óleos e Graxas (TOG). Dentre o estudo de síntese de emulsões, a emulsão mais estável constituiu em 1% (m/m) de óleo, sem adição de ácido, base ou sílica. Neste contexto, empregou-se essa emulsão nos testes que foram desenvolvidos com banhos de ultrassom de 25, 35, 45 e 130 kHz, nas temperaturas de 25 e 60 °C, no tempo de exposição de 20 minutos xxvi e ainda com avaliação da presença ou não de anéis de Raschig. O estudo evidenciou que a técnica de ultrassom aplicada na emulsão sintética apresentouse como promissora, retirando cerca de 70% do óleo presente na água, nas frequências de 35, 45 e 130 kHz, na temperatura de 60 °C e na presença de anéis de Raschig. Essas condições, que apresentaram os melhores resultados, foram selecionadas, também, para o estudo das águas de produção do campo A, de tempos menores de exposição ao ultrassom, em emulsões sintéticas mais concentradas e com partículas coloidais e de anéis de outros materiais que não o vidro (cobre, PVC, PTFE, aço e polipropileno). Os resultados indicaram que os testes podem ser otimizados para um tempo de exposição de 15 minutos, além disso, a presença de anéis de materiais mais densos, como o cobre e o aço, intensificou a separação das fases, alcançando valores de até 80% de redução do TOG. Para as outras emulsões sintéticas e as águas de produção os resultados de redução no valor do TOG foram menores do que para a emulsão 1% (m/m) de óleo, sem adição de ácido, base ou sílica. Concluiu-se então que o método desenvolvido, em escala laboratorial, foi eficiente para a separação das fases e além de ser um processo físico de separação, simples, de baixo tempo de residência e sem a adição de produtos químicos.
A major problem in the petroleum industries is related to the development of effective technologies for the wastewater treatment derived from the primary processing stage, which presents stable emulsions of oil in water (O/W). A methodology for the synthesis of O/W emulsions is tried. It runs a few tests with ultrasound equipment in order to evaluate the ability of this technique in phase separation and the reduction in the content of Oils and Grease (TOG). The most stable emulsion obtained was the 1% (w/w) O/W emulsion, without any addition of compounds. That emulsion was then employed in the tests developed with ultrasonic equipment with frequencies of 25, 35, 45 and 130 kHz at temperatures of 25 and 60 °C. The 20-minute exposure time and presence or absence of Raschig rings were assessed too. The use of ultrasound applied in synthetic emulsion appeared as a promising technique. It could remove about 70% of the xxvii oil content in the oil by applying frequencies of 35, 45 and 130 kHz at 60 °C with Raschig rings. The conditions of the best results were also selected for the study of produced water derived from the field A, but this time with shorter exposure time to ultrasound with more concentrated synthetic emulsions and colloidal particles, utilizing further materials like copper, PVC®, PTFE®, steel and polypropylene. Good results were obtained for 15-minute exposure time to ultrasound and denser materials such as copper and steel. TOG could reach values of up to 80% of reduction. The results for the other synthetic emulsions and produced water were worse than the 1 % (w/w) O/W emulsion, without acid, base or silica. Therefore, one can conclude this as an efficient laboratory method for oil/water phase separation and still fits a simple physical separation process with low cost, low dwell time and no need of chemical products.
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Almeida, Priscilla de Souza. "Contribuições para a pirólise da casca de cacau em leito de jorro : estudos da fluidodinâmica experimental e simulação via CFD." Universidade Federal do Espírito Santo, 2016. http://repositorio.ufes.br/handle/10/5356.

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A substituição de recursos não renováveis por renováveis é um dos grandes objetivos almejados mundialmente. O Brasil é um país que tem obtido sucesso nesta corrida por uma matriz energética onde as fontes alternativas são predominantes. A biomassa é uma fonte renovável promissora que ao ser utilizada com adequadas tecnologias é capaz de gerar produtos com alto potencial energético.A pirólise se destaca no cenário das tecnologias de conversão termoquímica, sendo os reatores mais indicados no processo aqueles capazes de fornecer uma excelente mistura dos componentes a serem pirolisados. O leito de jorro, por ser um equipamento que proporciona um elevado contanto entre sólidos e fluido, adéqua-se como um bom reator de pirólise. Sendo assim, um estudo fluidodinâmico do comportamento das partículas envolvidas neste processo é uma das etapas básicas para aplicação desta técnica. A casca do cacau é o principal resíduo do processo de beneficiamento do cacau, compondo cerca de 80% do fruto. Utilizada normalmente para produção de ração animal e fertilizantes,essa biomassa pode ser vista como uma conveniente fonte energética. O presente trabalho tem como objetivo principal estudar a fluidodinâmica de uma mistura binária composta por partículas de casca de cacau e areia em um leito de jorro. Foram avaliados parâmetros como velocidade de mínimo jorro e queda de pressão de jorro estável através de análises estatísticas para diferentes alturas de leito estático (6, 8 e 10cm) e frações mássicas de casca de cacau (25, 50 e 75%). A segregação das misturas foi analisada nas alturas de leito e frações mássicas da casca de cacau adotadas no estudo fluidodinâmico, variando a velocidade do ar em 10, 20 e 30% acima da velocidade de mínimo jorro. O regime de jorro estável foi estabelecido na região experimental estudada. Constatou-se que a velocidade de mínimo jorro não foi influenciada por variações na fração mássica, diferentemente da queda de pressão de jorro estável que sofreu interferência tanto da fração mássica quanto da altura de leito estático. A segregação das partículas foi observada nas regiões do topo e do fundo do leito. Simulações via CFD foram realizadas empregando o modelo Euleriano para descrever o escoamento gás-sólido no leito de jorro e utilizando uma malha bidimensional estruturada. As simulações se mostraram de acordo com o observado experimentalmente com relação ao comportamento fluidodinâmico e a segregação no fundo do leito
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Barcelos, Kamilla Malverdi. "Análise do potencial do leito de jorro como reator para pirólise da casca de coco : estudo experimental e simulação via CFD." Universidade Federal do Espírito Santo, 2016. http://repositorio.ufes.br/handle/10/5355.

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O aumento significativo no consumo e industrialização de água de coco verde no Brasil tem gerado grande quantidade de resíduos, os quais ampliam os problemas ambientais quando dispostos de maneira inadequada. No contexto atual de crescentes preocupações com questões energéticas, o potencial dessa biomassa como fonte renovável de energia é destacado. Dentre as tecnologias de conversão termoquímica de materiais lignocelulósicos, a técnica de pirólise vem recebendo atenção especial e o leito de jorro tem sido investigado como um reator promissor para esse processo, devido ao bom contato gás-sólido que proporciona. Entretanto, a complexidade fluidodinâmica nesse equipamento permanece sendo o principal obstáculo para sua utilização. Assim, com o intuito de contribuir para a aplicação do leito de jorro como reator de pirólise, este trabalho tem como objetivo investigar o comportamento fluidodinâmico das misturas de casca de coco e areia por meio de estudos experimentais e simulação via CFD. A análise dos dados de queda de pressão no leito permitiu identificar regimes de jorro estáveis para misturas com até 40% em massa de casca de coco. Para avaliar o efeito da fração mássica da casca de coco (10, 25 e 40 %) e altura de leito estático (6, 8, 10 cm) sobre a condição de jorro mínimo, foi realizada uma análise estatística por meio de um planejamento fatorial 32 com dois pontos centrais. Foi verificada a influência da massa total das partículas no leito e porosidade da mistura sobre a condição de mínimo jorro. A segregação ocorreu de forma sutil para todas as condições experimentais e o índice de mistura se desviou mais do ideal na base do equipamento, com predominância de areia, partícula mais densa, nessa região. O modelo Euleriano Granular Multifásico foi utilizado para descrever o escoamento de ar-sólido no leito de jorro e mostrou-se adequado para representar qualitativamente esse fenômeno. Entretanto, ao se analisar os valores de queda de pressão de mínimo jorro, nota-se que os resultados simulados subestimam os experimentais, com um erro relativo máximo de -34,26%. Diante da análise da estabilidade do leito, segregação e a fração de volume de cada fase na mistura, é recomendada a utilização de misturas com fração mássica de casca de coco de 25% em testes de pirólise.
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Souza, Felipe Oliveira. "Desenvolvimento de método de extração-floculação por aplicação de ondas ultrassônicas em óleo lubrificante usado." Universidade Federal do Espírito Santo, 2015. http://repositorio.ufes.br/handle/10/5346.

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Neste trabalho é proposto um processo baseado no uso de ultrassom (US) para a recuperação de óleos lubrificantes usados que não foram degradados. O sistema consistiu na aplicação de um campo acústico através de um banho de US sendo que o óleo lubrificante usado e contaminado (OLUC) foi misturado com diferentes solventes no interior de recipientes cilíndricos. Após a aplicação do ultrassom, o óleo recuperado foi submetido à determinação de suas propriedades reológicas e físico-químicas, conforme portaria ANP 129/1999. Foram realizadas análises dos parâmetros de solubilidade de Hildelbrand/Hansen para a identificação dos melhores solventes extratores. A metodologia desenvolvida foi otimizada pela utilização de modelos estatísticos de planejamentos experimentais. A análise comparativa do método desenvolvido, com demais métodos de extração por agitação, permitiu observar que a aplicação de ultrassom aumenta o rendimento em massa do processo em pelo menos 36%. A recuperação de óleos lubrificantes a partir do OLUC, utilizando tecnologias de ultrassom, permite uma economia significativa de tempo e energia em relação aos demais processos utilizados industrialmente. A extração facilitada por ultrassom e solventes alcóolicos é um método inovador, simples, eficiente e ecologicamente correto. A aplicação desta tecnologia permitirá que a logística de recuperação do óleo lubrificante usado e contaminado seja mais simples, acessível e beneficie a sociedade e meio ambiente como um todo.
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Batista, Renato Rocha. "Rotas de aproveitamento tecnológico de resíduo orgânico agrícola : casca de coco, casca de cacau e casca de café : destinadas à geração de energia." reponame:Repositório Institucional da UFES, 2014. http://repositorio.ufes.br/handle/10/1876.

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Submitted by Patricia Barros (patricia.barros@ufes.br) on 2016-05-13T17:16:07Z No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Rotas Tecnológicas para o aproveitamento de resíduo agrícola - otimização estrutural e tecnológica pelo método heurístico.pdf: 1501845 bytes, checksum: b8c8c82e53301f42548d2113d2626e0f (MD5)
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A avaliabilidade de resíduos agrícolas para geração de bioenergia vem se destacar como interesse recente por parte do setor de agroenergia. Para essa finalidade, esse trabalho de dissertação realiza-se um estudo bibliográfico de caracterização de resíduos da casca do cacau, coco e café; para adequação às tecnologias de biodigestão anaeróbia, pirólise e combustão direta. Avalia-se as possibilidades de rotas tecnológicas para a transformação do potencial energético inerente à composição dos resíduos de fruta em energia elétrica. O objetivo é direcionado à síntese estrutural de processos químicos pela representação do problema por meio de árvores de estado. A partir da combinação dos elementos de estudo envolvidos: resíduos frutíferos, tecnologias de beneficiamento da biomassa e tecnologias de conversão química; são propostas as possibilidades de rotas tecnológicas para composição dos ramos das árvores de estado. A etapa de otimização estrutural é direcionada à aplicação do método heurístico em relação ao problema de síntese. Dessa forma, é selecionada a rota tecnológica mais promissora de aproveitamento energético de cada resíduo. Como resultado, a biodigestão anaeróbia em reator do tipo batelada se mostrou a rota química mais promissora para o resíduo da casca de cacau. Para o resíduo da casca de coco, a rota química adequada foi a combustão direta, realizada em caldeira de grelha fixa; e para o resíduo da casca de café, a rota de conversão termoquímica do tipo pirólise precedida de peletização se mostrou mais promissora. Como contribuição, cabe destacar a possibilidade de valoração energética de resíduos frutíferos até então considerados inúteis para o setor energético. A representação do problema pela sistemática de árvores de estado e posterior resolução pela aplicação de regras heurísticas demonstra a originalidade do trabalho proposto.
The availability of agricultural waste for bioenergy generation come to propose the recent interest by agroenergy sector. For this goal, this dissertation show a bibliografic study for waste characterization of cocoa bark, coconut bark and coffee bark in according to bioenergy technologies: anaerobic digestion, pyrolisys and direct combustion. Its made analysis of technology route possibilities for transform the energy potencial from fruit waste composition in electric energy. The objective its towards the structural synthesis of chemical process by problem representation with process state trees. From the combination of elements of study: fruit waste, biomass processing technology and chemical conversion technologies; its proposed the possibilities of technology routes for elaborate the branches of state trees. The step of structural optimization its based in applied the heuristics method towards the syntesys problem. Thus, its selected the most promised technology route of energetic use of each waste. As a result, the anaerobic digestion in batch reactor was the better option for cocoa bark. For a coconut bark, the chemistry route more adequated was the direct combustion, realized in boiled fixed grid; and for a coffee bark, the thermochemical pyrolysis conversion preceded by pelletization compactation showed more promised. As contribution from this work of dissertation stands out the possibility of energetic valorization of fruit waste untill then considered useless for energetic sector. The problem representation by systematic of state trees and after applied solution by heuristics rules show the originality from this proposed work.
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Silva, Leonardo Rogério Binda da. "Particionador paralelo de grafos utilizando algoritmos heurísticos para aplicação em simuladores paralelos de reservatórios de petróleo." Universidade Federal do Espírito Santo, 2014. http://repositorio.ufes.br/handle/10/5337.

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O petróleo é atualmente o combustível mais utilizado no mundo. Recuperá-lo com a maior viabilidade econômica possível é uma busca incessante das companhias produtoras. Nesse cenário, a simulação numérica de reservatórios utilizando computadores paralelos de memória distribuída (clusters) desponta como uma importante ferramenta. Esses aplicativos manipulam malhas de pontos discretizados que representam o domínio do reservatório de petróleo. Uma etapa importante da simulação utilizando clusters é o particionamento dessa malha para que cada um dos nós processadores possa executar seus cálculos sobre uma porção da mesma. As malhas de domínio podem ser representadas por grafos. Particionar malhas, então, torna-se um problema de particionamento de grafos. Caso o número de vértices do grafo que representa a malha seja muito elevado, particionadores seriais podem apresentar problemas de desempenho. Particionadores de grafos utilizando clusters surgem como alternativas interessantes nessa situação, minimizando os tempos gastos nos particionamentos. Trata da implementação de um particionador paralelo de grafos para ser utilizado em clusters baseado nas Heurísticas de particionamento propostas e implementadas de maneira serial por Bonatto (2010). O particionador paralelo foi desenvolvido utilizando a linguagem de programação Java e a biblioteca de passagem de mensagens MPJ Express. Tipos abstratos de dados eficientes foram propostos e implementados para que o desempenho fosse otimizado. O particionador de grafos paralelo realizou o corte de diversos grafos, obtendo em sua grande maioria cortes menores do que os encontrados pelo particionador serial de Bonatto (2010) e por programas como o METIS e o CHACO. Melhorias ao particionador serial de Bonatto (2010) foram propostas. Análises de speedup e eficiência paralela foram realizadas para constatar os ganhos de tempos obtidos com a paralelização das heurísticas.
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Facuri, Rafael Manache. "Estudo do escoamento laminar sólido-líquido em anular excêntrico empregando a técnica de dinâmica de fluidos computacional." Universidade Federal do Espírito Santo, 2014. http://repositorio.ufes.br/handle/10/5342.

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Técnicas de exploração como poços horizontais, para aumentar a eficiência de produção, têm sido praticadas, porém isso traz um cenário desafiador para a operação, o que inclui o transporte de cascalhos durante a perfuração do poço. Diversos parâmetros afetam a eficiência desse transporte, incluídos, principalmente, nas propriedades do fluido de perfuração e nas características do sistema de perfuração. Além da ampla gama de parâmetros, e suas interações, o que dificulta os estudos deste tema, as condições reais às quais estas variáveis se aplicam como, torna o desafio ainda mais complexo, pois essas condições nem sempre reprodutíveis em unidades experimentais. Nesse sentido, buscou-se modelar, através da técnica de CFD (Computational Fluid Dynamics), o fenômeno multifásico de transporte dos cascalhos pelo fluido de perfuração. O modelo computacional foi baseado na abordagem Euleriana Granular para simulação do escoamento multifásico sólido-líquido em regime laminar, sendo seu desempenho avaliado a partir dos dados experimentais de Yu et. al. (2007). Com esse modelo, analisou-se a fluidodinâmica do escoamento para um fluido não-Newtoniano tipo plástico de Bingham em uma coluna horizontal com excentricidade de 13,74 mm (offset), abordando os efeitos da vazão do fluido, da rotação da coluna e da taxa de penetração na eficiência do transporte dos cascalhos utilizando o planejamento experimental do tipo composto central de 16 ensaios. A comparação dos resultados experimentais de Yu et. al. (2007) e do modelo mostrou boa concordância, com desvios médios de |6,6%|. Posto isso, foi possível elucidar a ordem de grandeza dos efeitos das variáveis sobre a concentração de cascalhos e a queda de pressão, com destaque para o efeito potencializador da rotação da coluna na eficiência da limpeza do poço e o importante efeito da vazão na queda de pressão. Entretanto, a vazão apresentou insignificante efeito sobre a concentração de cascalhos, mostrando que dentro da faixa do escoamento laminar, a eficiência da limpeza do poço é pouco afetada da vazão do fluido de perfuração. Os resultados das simulações numéricas corroboraram com os resultados encontrados na literatura.
Exploration techniques such as horizontal wells to increase production efficiency have been practiced but it brings a challenging scenario for the operation, which includes the transport of cuttings during the drilling operation. Several parameters affect the efficiency of the transport including mainly properties of the drilling fluid and the characteristics of the drilling system. Besides the wide range of variables, and their interactions, which affects this efficiency and makes this study difficult, the real conditions in which these variables are applied as high temperature and pressure, it makes the challenge even more complex, especially because these conditions are not always possible to be reproduced in experimental units. In this sense the multiphase flow phenomenon of carrying cuttings by the drilling fluid was modeled through the technique of CFD (Computational Fluid Dynamics). The computational model was based on the Eulerian Granular approach for simulating the solid-liquid multiphase flow in a laminar regime and the model was validated by the experimental data from Yu et al. (2007). With this model the fluid dynamics of a non-Newtonian fluid Bingham plastic was analyzed in a horizontal column with eccentricity of 13.74 mm (offset) studying the effects of the drilling fluid flow, the drilling pipe rotation and penetration rate in the efficiency of cuttings removal, using central composite design with 16 runs. The comparison of the experimental results of Yu et al. (2007) and the model showed good agreement with average deviations of |6.6%|. That said, it was possible to elucidate the order of magnitude of the effects of the variables on the cutting removal and the pressure drop, giving special attention for the maximizing effect of drilling pipe rotation on the hole cleaning efficiency and for the important effect of fluid flow on the pressure drop. However, the flow had insignificant effect on the cuttings concentration, showing that within the tested range of laminar flow, the hole cleaning efficiency is little affected by flow of the drilling fluid. The results of the numerical simulations agreed with the results found in the literature.
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Ястремська, Лариса Сергіївна, and Катерина Миколаївна Яблонська. "Wastewater treatment and energy carier producing by thermophilic anaerobic association." Thesis, National Aviation Universitty, 2013. http://er.nau.edu.ua/handle/NAU/38606.

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With sewage сardboard-рaper enterprise Kyiv isolated of technologically promising thermophilic (60 oC) anaerobic microbe association that consists of cellulolytic and methanogenic bacteria. Within 4-5 days association completely destroys the cellulose and synthesizes the first hydrogen and later methane. Besides methane is also formed ethanol, acetate, propionate, butyrate. When using anaerobic аssociation in wastewater cleaning сardboard - рaper enterprise, chemical consumption oxygen decreases by three times
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Копча, Ерік Іванович. "Управління модернізацією виробничої діяльності підприємства." Master's thesis, КПІ ім. Ігоря Сікорського, 2021. https://ela.kpi.ua/handle/123456789/45999.

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Магістерська дисертація на здобуття ступеня магістра на тему «Управління модернізацією виробничої діяльності підприємства» містить 98 сторінок, 47 таблиць, 8 рисунків, 3 додатків. Перелік посилань нараховує 63 найменувань. Актуальність теми дослідження зумовлена тяжкими конкурентними умовами, нечисленність фінансових ресурсів та малорозвиненість в організації виробничої діяльності. Причиною цього є також відставання у розвитку інформатизації, глобалізації та адаптаційних виробничих систем. У сучасній українській економіці спостерігається відсутність узгодженості між імовірними можливостями промислових підприємств, які, з одного боку, присутні у технологіях та техніці, а з іншого боку - у методиці організації виробництва. Необхідність вирішення порушених питань потребує розроблення організаційно - економічного механізму модернізаційного розвитку підприємства. Зв’язок роботи з науковими програмами, планами, темами. Робота виконувалася згідно з планом наукових досліджень кафедри менеджменту КПІ ім. Ігоря Сікорського у межах науково-дослідної теми «Управління розвитком інноваційного підприємництва в умовах неоіндустріальної економіки» (№ ДР 0118U100598). Автором узагальнено та обґрунтовано управління модернізацією виробничої діяльності підприємства, зокрема запропоновано процедуру управління процесом модернізації. Метою магістерської роботи є узагальнення теоретико-методичних засад та розроблення практичних рекомендацій з управління модернізацією виробничої діяльності підприємства. Об’єктом дослідження є процеси модернізації виробничої діяльності підприємства. Предметом дослідження є теоретичні, методичні та прикладні засади управління модернізацією виробничої діяльності підприємства. База дослідження: ТОВ «Нібулон». У процесі виконання магістерської роботи основою магістерської роботи виступив системно-структурний підхід, що розглядає процес управління модернізацією виробничої діяльності підприємства як цілісну структуровану систему, що є одночасно частиною управління підприємством в цілому. Вирішення поставлених у роботі завдань забезпечувалося використанням основних методів дослідження, а саме методів наукової абстракції, аналізу, синтезу, систематизації, узагальнення, логічного аналізу, системного підходу. Для розв’язання визначених завдань також застосовувалися наступні методи: монографічний – при вивченні літературних джерел та нормативно-правових актів, теоретичне узагальнення, порівняння та аналогії – для розкриття сутності понять “модернізація” та “управління”, балансовий та аналізу – для дослідження тенденцій функціонування підприємства, синтезу – для формування висновків та контролю господарської діяльності підприємства. Науковою новизною одержаних результатів полягає у розробленні практичних рекомендацій з удосконалення управління модернізацією виробничої діяльності підприємства, зокрема запропоновано процедуру управління процесом модернізації виробничої діяльності підприємства, що реалізується в межах розробленого проєкту. Практичне значення одержаних результатів полягає в обґрунтуванні напрямів підвищення ефективності системи управління модернізацією виробничої діяльності підприємства. Визначено економічний ефект від реалізації запропонованих заходів. Апробація результатів роботи: Бояринова К.О., Копча Е.І. Проблеми модернізації матеріально-технічної бази виробництва. Економіка, облік, фінанси та право: концептуальні та практичні аспекти розвитку: матеріали міжнар. наук. –прак. конф, м. Полтава, 3 грудня 2021р. Полтава. URL: http://www.economics.in.ua Бояринова К.О., Копча Е.І. Модернізація виробничої діяльності як основа розвитку промислового підприємства. Економіка, облік, фінанси та право: концептуальні та практичні аспекти розвитку: матеріали міжнар. наук. –прак. конф, м. Полтава, 3 грудня 2021р. Полтава. URL: http://www.economics.in.ua/
The master's dissertation for a master's degree on "Management of modernization of production activities of the enterprise" contains 98 pages, 29 tables, 10 figures, 6 appendices. The list of links includes 63 items. The relevance of the research topic is due to difficult competitive conditions, lack of financial resources and underdevelopment in the organization of production activities. The reason for this is also the lag in the development of informatization, globalization and adaptive production systems. In the modern Ukrainian economy there is a lack of consistency between the probable capabilities of industrial enterprises, which, on the one hand, are present in technology and engineering, and on the other hand - in the methodology of organization of production. The need to address the issues raised requires the development of organizational and economic mechanism of modernization of the enterprise. Intercourse of work with scientific programs, plans, topics. The work was performed in accordance with the research plan of the Department of Management of KPI named after Igor Sikorsky within the research topic "Management of innovative entrepreneurship in a neo-industrial economy" (№ DR 0118U100598). The author summarizes and substantiates the management of modernization of production activities of the enterprise, in particular, proposes a procedure for managing the process of modernization of production activities of the enterprise, which is implemented within the developed project. The purpose of the master's work is to generalize the theoretical and methodological principles and develop practical recommendations for managing the modernization of production activities of the enterprise. The object of research is the processes of modernization of production activities of the enterprise. The subject of research is the theoretical, methodological and applied principles of management of modernization of production activities of the enterprise. Research base: Nibulon LLC. In the process of master's work the basis was a system-structural approach, which considers the process of managing the modernization of production activities of the enterprise as a holistic structured system, which is also part of the management of the enterprise as a whole. The solution of the tasks set in the work was provided by the use of basic research methods, namely the methods of scientific abstraction, analysis, synthesis, systematization, generalization, logical analysis, systems approach. The following methods were also used to solve certain tasks: monographic - in the study of literature and regulations; theoretical generalization, comparison and analogy - to reveal the essence of the concepts of "modernization" and "management"; method of analysis - to study the trends of the enterprise; method of synthesis - to draw conclusions and control the economic activities of the enterprise. The scientific novelty of the results is the development of practical recommendations for improving the management of modernization of production activities of the enterprise, in particular, proposed a procedure for managing the process of modernization of production activities, implemented within the project of modernization of production activities. The practical significance of the obtained results lies in the substantiation of the directions of increasing the management system’s efficiency of the production activity’s modernization of the enterprise. The economic effect of the implementation of the proposed measures is determined. Approbation of work results: Boyarynova K.O., Kopcha E.I. Problems of modernization of material and technical base of production. Economics, Accounting, Finance and Law: Conceptual and Practical Aspects of Development: materials of the International scientific-practical conference, Poltava, December 3, 2021. Poltava. Boyarynova K.O., Kopcha E.I. . Modernization of production activities as a basis for the development of industrial enterprises. Economics, Accounting, Finance and Law: Conceptual and Practical Aspects of Development: materials of the International scientific-practical conference, Poltava, December 3, 2021. Poltava.
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Оргєєва, Світлана Володимирівна, Володимир Владиславович Коротя, and Василь Іванович Пахомов. "Технологии обучения будущих пилотов в высших учебных заведениях на основе модели интегративной физической подготовки." Thesis, Российский государственный профессионально-педагогический университет, 2017. http://er.nau.edu.ua/handle/NAU/26207.

Full text
Abstract:
Статья содержит теоретические и методические материалы технологии обучения профессионально-прикладной физической подготовки будущих пилотов в ВУЗе.
The article contains theoretical and methodological materials technology training professional-applied physical training of future pilots at the university.
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