1,166 research outputs found
Journal of Engineering and Technological Sciences : Volume 47, Nomor 3, July 2015
No full text1. Production of Methyl Laurate from Coconut Cream through Fractionation of Methyl Ester J.P. Sitompul, A.N. Istyami, R. Muhtadi, H.W. Lee & H. Rahman
2. Enhancement of Chlorella vulgaris Biomass Cultivated in POME Medium as Biofuel Feedstock under Mixotrophic Conditions M.M. Azimatun Nur & H. Hadiyanto
3. Alkaline Treatment of Oil Palm Frond Fibers by Using Extract of Oil Palm EFB Ash for Better Adhesion toward Polymeric Matrix
Warman Fatra, Randi Sanjaya, Zulfansyah, Hari Rionaldo & Zuchra Helwani
4. Partial Hydrogenation of Calophyllum Inophyllum Methyl Esters to Increase the Oxidation Stability Joelianingsih, P. Putra, A.W. Hidayat & R. Fajar
5. Layer-by-Layer Fabrication of High-Performance Broadband Anti-reflection Coatings Coprising Oppositely Charged Nanosheets and Nanoparticles
Xin Wu, Jinjuan Xue, Yuming Zhou, Shuaishuai Ma & Man He
6. Modeling of Dynamic Responses in Building Insulation
Anna Antonyova, Peter Antony & Endra Joelianto
7. Thermal Energy Storage Optimization in Shopping Center Buildings
Totok R. Biyanto, Akhmad F. Alhikami, Gunawan Nugroho, Ridho Hantoro, Ridho Bayuaji, Hudiyo Firmanto, Joko Waluyo & Agus Imam Sonhaji
8. Performance Calculation of Floating Wind Turbine Tension Leg Platform in the South China Sea Hai Feng Wang & You Hua Fa
Production of Methyl Laurate From Coconut Cream Through Fractionation of Methyl Ester
No full textThis paper concerns the production of methyl laurate from coconut cream through fractionation of methyl esters. Coconut oil was produced by wet processing of coconut cream. The esters were prepared by reacting coconut oil and methanol using homogeneous catalyst KOH in a batch reactor, followed by fractionation of fatty acid methyl esters (FAME) at various reduced pressures applying differential batch vacuum distillation. Experimental data were compared with simulation of a batch distillation employing the simple Raoult's model and modified Raoult's model of phase equilibria. Activity coefficients (γi) were determined by optimization to refine the models. The modified Rault's model with activity coefficients gave better agreement with the experimental data, giving the value of γi between 0,56-0,73. For a given boiling temperature, lower operating pressure produced higher purity of C10 and C12 FAME for respective distillates
Golden Horde History in the Works of A.N. Kurat
No full textThe article examines main works of the famous Turkish historian A.N. Kurat, his views and assessments of the Golden Horde history. It is known that A.N. Kurat introduced into scholarly circulation yarlyks-letters of the Golden Horde khans, which he found in the archives of the Topkapi Palace in Istanbul. A number of his works and articles are devoted to the Golden Horde and its rulers. The article discusses the works of A.N. Kurat that are dedicated to the Golden Horde, as well as his main ideas, sources of the author. The works of A.N. Kurat still have not lost their significance. His works on the Golden Horde topics are mainly devoted to the source study, his reconstruction of events is based on primary sources of the Golden Horde origin. Kurat also noted the special importance of his own sources. In his works, he explored the following three Golden Horde documents: Bitik of Ulugh Muhammad Murad II, letter of Mahmud Khan bin Muhammad Khan bin Timur Khan to Fatih Sultan Mehmed, and letter of Ahmad Khan ibn Muhammad ibn Timur Khan to Fatih Sultan Mehmed. Kurat studied yarlyks and bitiks at a high scholarly level of source studies. They still are the basis for the study of the Golden Horde documents. Thanks to the good knowledge of the Ottoman, Russian, European sources, and historiography A.N. Kurat analyzed in detail the political situation in the Golden Horde; especially valuable are his works on the 15th century. His works on the period of Ulug Muhammad are still among the most important works devoted to this outstanding personage of the late Golden Horde. In his works Kurat asked himself: why the Golden Horde disintegrated? In search of answers to this question he put to the first place the confrontation between Tokhtamysh Khan and Timur Aksak. His conclusions about relationship between the Golden Horde and the Ottoman Empire are confirmed by the latest works on this topic
Author Correction: New perspectives on Neanderthal dispersal and turnover from Stajnia Cave (Poland)
No full textThe Author contributions section now reads:“W.N., A.N. and S.T. designed research; A.P., M.H., W.N., S.B., M.U., A.M., H.F., M.D.B., P.S., K.S., M.Ż., A.W., A.N. and S.T. performed research; A.P., M.H., W.N., S.B., M.U., A.M., H.F., M.D.B., P.S., K.S., M.Ż., A.W., A.N. and S.T. analysed data; A.P., M.H., S.T., W.N. and S.B. wrote the paper with the collaboration of all the co-authors.
Esperienza ed evento della verità. Pratica filosofica e astrazione scientifica nel pensiero di A.N. Whitehead
No full textIl presente articolo analizza il rapporto tra filosofia, esperienza ed evento nel pensiero di A.N. Whitehead. L’autrice ripercorre e descrive, a partire dalla critica al concetto di oggetto, la peculiare dialettica di astratto e concreto al centro dalle indagini whiteheadiane sull’esperienza percettiva. Successivamente, viene mostrato come la pratica filosofica differisca da ogni genere di scienza, pur necessitandone in virtù della co-implicazione di oggetto ed evento, astrazione e riconoscimento.
Experience and event of truth. Philosophical practice and scientific abstraction in A.N. Whitehead's thought
This article analyzes the relationship between philosophy, experience and event in A.N. Whitehead’s thought. From the critic of the concept of object, the author retraces and describes the peculiar “abstract-concrete dialectic”, at the center of the researches concerning the perceptual experience.
Furthermore, according to Whitehead’s later works, she demonstrates how the philosophical practice is different from all other kinds of science, although it requires science itself because of the co-implication of object and event, abstraction and recognition
The Conceptosphere of A.N. Tolstoy’s Prose (Literary Aspect)
No full textThe article deals with A.N. Tolstoy’s conceptosphere, which has found a vivid artistic embodiment in his work. The research focuses on the literary understanding of the concept and determines its semantic scope. The author proceeds from the interpretation of the concept as a complex synthetic formation that combines an image and a concept, an ideologeme and a mythologeme. The article focuses on the universalism of the concept. The study of the conceptosphere helps to identify the characteristic signs of the writer’s world as an artistic system. The article gives the classification of the main concepts in the prose of A.N. Tolstoy. We are talking about such concepts as “childishness,” “objectivity of vision,” “everyday dimension,” “fabric of everyday life,” “physicality,” “thing,” “game,” “adventures” (“escapades”), “amazement” (“surprise”), “dynamics / statics,” “backwoods,” “city and civilization,” “time” (and its gradations), “turmoil,” “power,” “laughter,” and “happiness in love.” The combination of these interconnected and Tolstoy-like unique universals allows us to get closer to understanding the author’s code and reveal their connection with the fundamental life / death opposition. The article traces the formation of the Tolstoy conceptosphere and its movement from the direct discovery children’s primary principles of life to the complex multidimensional comprehension of the deep foundations of human existence in its space-time coordinates. The article provides an idea about the influence of A.N. Tolstoy’s conceptual sphere on the macro- and micropoetics of the writer’s prose and particular nuances of the narrative manner of the great word artist
Author Correction:A 41,500 year-old decorated ivory pendant from Stajnia Cave (Poland)
No full textCorrection to: Scientific Reports https://doi.org/10.1038/s41598-021-01221-6, published online 25 November 2021The original version of this Article contained errors in the author list where Marjolein D. Bosch was omitted from the author list, and Mikołaj Urbanowski was incorrectly listed as an author of the original Article, and has subsequently been removed.The Author contributions section now reads:“S.T. W.N. and A.N. conceived the project; S.T., W.N., A.P., M.B., S.C., M.D., H.F., A.M., M.D. B., D.P., M.P.R., C.M.R., V.S-M., G.M.S., P.S., M.S., K.S., A.V., F.W., H.W., A.W., M.Z., S.B., A.N., J-J. H., performed research; S.T., A.P., W.N., M.B., M.D.B., S.C., M.D., H.F., A.M., D.P., M.P.R., C.M.R., V.S-M., G.M.S., P.S., M.S., K.S., A.V., F.W., H.W., A.W., M.Z., S.B., A.N., J-J. H. analysed all archaeological data; S.T. and A.P. wrote the paper with the collaboration of all the co-authors.”The original Article and its accompanying Supplementary Information file have been corrected
New Aspects of the Scientific Heritage of A.N. Zyryanov
No full textИсследуются новые, ранее не известные и не анализированные аспекты научной деятельности зауральского историка и этнографа второй половины ХIХ в. А.Н. Зырянова. Он публиковал свои исследования как в крупных научных журналах того времени, так и в газетах, таких как «Пермские губернские ведомости». Речь в этих публикациях шла и об истории края ХVIII–ХIХ вв. и о повседневности города Далматова, где А.Н. Зырянов жил и работал. Он выступает как историк-хронист, публикующий найденные в архиве документы ХVII–ХVIII вв. Краевед рассматривает состояние климата, медицины, вопросов нравственности в родном городе. Волнует его также проблема грамотности своих соотечественников, особенно крестьян, для чего он в 1859 г. жертвует Шадринскому земству книги и газеты. А.Н. Зырянов пытался решить проблему пьянства в крестьянской среде, для чего писал на эту тему и пытался не без успеха отвлечь крестьян от «зеленого змия» с помощью чтения книг и газет. Кроме этого, он собирал зауральский фольклор: народные песни, загадки, а также писал стихи. После смерти о А.Н. Зырянове забыли и вспомнили лишь в 30-е гг. ХХ в., а памятник первому археологу и краеведу Зауралья поставили в Далматове лишь в 2000 г.DOI 10.14258/izvasu(2017)2-28In this article the author examines the new aspects of the scientific activities of A.N. Zyryanov from Zauralje that previously were not analyzed and considered. A.N. Zyryanov was a historian and ethnographer of the second half of the 19th century. He published his research in the newspaper Perm Gubernsky Gazette and also in several famous scientific magazines of that time. These publications were about the history of region in the 17th–19th centuries. They described the daily life of Dalmatovo, the town where A. N.Zyryanov lived and worked. He was a chronicler who published documents of the 17th–18th centuries. They were found by A.N. Zyryanov in the archive. The ethnographer researched the situations with the climate and medicine in his hometown he also investigated. The issues of morality. He was concerned with the problem of countrymen's literaсy. So in 1859 he donated books and newspapers to the district Council of Shadrinsk. A.N. Zyryanov was trying to solve the alcoholism problem among the peasants. So he wrote articles about this subject and tried to interest the peasants by reading books and newspapers to distract them from the so called "green serpent". A.N. Zyryanov had some success in this intention. Additionally, he wrote poetry and was interested in folklore: folk songs, riddles. People forgot about outstanding historian after his death. However, they remembered about him in the 1930s. Now there is a monument to the first archaeologist and ethnographer of Zauralje, that was established in Dalmatovo only in 2000.DOI 10.14258/izvasu(2017)2-2
Wall to wall optimal transport
No full textThe calculus of variations is employed to find steady divergence-free velocity fields that maximize transport of a tracer between two parallel walls held at fixed concentration for one of two constraints on flow strength: a fixed value of the kinetic energy or a fixed value of the enstrophy (the mean square rate of strain in this situation). The optimizing flows realize upper limits on convective transport in this scenario. We interpret the results in the context of buoyancy-driven Rayleigh–Bénard convection problems that satisfy the flow intensity constraints, enabling us to investigate how optimal transport scalings compare with upper bounds on Nu expressed as a function of the Rayleigh number Ra
Internet and e-health Care: an Interdigital Field of Study
No full textThe foreword focuses on a historical definition of the e-health field. The author contributed to shaping the e-health field in the international community being one of the pioneers' scholars since the 1990s. The chapter discusses current and challenging future scenarios based on the international evolution that brings about new challenges
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