• Title/Summary/Keyword: resemblance

Search Result 221, Processing Time 0.021 seconds

Prediction of Aerodynamic Loads for NREL Phase VI Wind Turbine Blade in Yawed Condition

  • Ryu, Ki-Wahn;Kang, Seung-Hee;Seo, Yun-Ho;Lee, Wook-Ryun
    • International Journal of Aeronautical and Space Sciences
    • /
    • v.17 no.2
    • /
    • pp.157-166
    • /
    • 2016
  • Aerodynamic loads for a horizontal axis wind turbine of the National Renewable Energy Laboratory (NREL) Phase VI rotor in yawed condition were predicted by using the blade element momentum theorem. The classical blade element momentum theorem was complemented by several aerodynamic corrections and models including the Pitt and Peters' yaw correction, Buhl's wake correction, Prandtl's tip loss model, Du and Selig's three-dimensional (3-D) stall delay model, etc. Changes of the aerodynamic loads according to the azimuth angle acting on the span-wise location of the NREL Phase VI blade were compared with the experimental data with various yaw angles and inflow speeds. The computational flow chart for the classical blade element momentum theorem was adequately modified to accurately calculate the combined functions of additional corrections and models stated above. A successive under-relaxation technique was developed and applied to prevent possible failure during the iteration process. Changes of the angle of attack according to the azimuth angle at the specified radial location of the blade were also obtained. The proposed numerical procedure was verified, and the predicted data of aerodynamic loads for the NREL Phase VI rotor bears an extremely close resemblance to those of the experimental data.

A Linguistic Approach to Communication Strategies of Biological Systems (생물체의 정보소통전략에 대한 언어학적 접근)

  • Kim, Soo-Yeon;Oh, Duk Jae
    • KSBB Journal
    • /
    • v.32 no.1
    • /
    • pp.29-34
    • /
    • 2017
  • The completion of the Human Genome Project that identified all 3 billion base pairs in the human genome can be seen as a step towards understanding the relay of information and intention within an organism, or in other words, the language of life. The faculty of human language, key to differentiating humans from other animate species, works for conveying information to others by mapping meaning to sound based on syntactic structures. This resemblance between life and language has not gone unnoticed; the literature on RNA transcription and translation research regularly uses linguistic metaphors and the biolinguistic perspective of language has also been studied. By examining the biological characteristics of language and the linguistic characteristics of life, this study aims to identify key mechanisms shared between the two systems in order to promote a stronger connection between them. It furthers this goal by pointing out two general messages to which these mechanisms aim, productivity and accuracy, and discovers what lesson these messages give to a human society geared for sustainability.

Alveolar soft-part sarcoma of the tongue : report of a case

  • Song, Woo-Sik;Oh, Chang-Young;Han, San-Gun;Kang, Hae-Yoon
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
    • /
    • v.33 no.1
    • /
    • pp.63-68
    • /
    • 2007
  • Alveolar soft-part sarcoma(ASPS) is a rare, aggressive malignancy of uncertain histologic origin with a propensity for vascular invasion and distant metastasis. ASPS may mimic benign vascular neoplams of malformation but careful evaluation of the unique imaging features on CT scans, MR images, and angiograms lead to the correct diagnosis. ASPS of the tongue is slow-growing, painless mass, especially ASPS of the base the tongue is difficult to be noticed by patient, dentists or oral and maxillofacial surgeons on oral examintion because of its location and clinical resemblance to a benign lesion. And it leads to delayed or inadequate diagnosis. We report radiologic and clinical features of an ASPS of the basal portion of the tongue in a 17-year-old boy, showing normal appearance, but palpation of the tongue and floor of the mouth reveals the tumor. Among the 23 cases of a primary ASPS of tongue reported, 7 cases occured on the basal region of the tongue, inculding the present one. There has been no recurrence or metastasis as of 3 years postoperatively.

A Study on Russian Religious Thoughts of Universalism and Modern Creativity-Art - Focused on Common Meanings of Orientalism, Universalism and Froebelianism related to Religious Philosophy of Panentheism - (러시아 보편주의 종교사상과 근대 창조성-예술에 관한 연구 - 범재신론의 종교철학과 관련된 오리엔탈리즘, 보편주의, 프뢰벨주의의 공통된 의미를 중심으로 -)

  • Oh, Zhang-Huan
    • Korean Institute of Interior Design Journal
    • /
    • v.23 no.4
    • /
    • pp.149-156
    • /
    • 2014
  • In the Russian 'spirituality' which played an important role in realization of 'abstraction' in modern arts, the three elements of Universalism - Oriental thoughts, Universal ideas, and Froebelian influence - can be found with no difficulty. More notable is the fact that, along with theosophy, the emergence of modern existential thoughts such as Bergson, Schopenhauer, Nietzsche is a new search and a new recognition of nature and human as views of panentheism and humanism, essentially of Humane and Divine. Therefore, it goes without saying that the thoughts constituting the Suprematism or Constructivism in Russia are, in a word, implicit in the existential humanistic ideas of Panpneumatism or Panentheism that is explained as the nature of Russian religious ideas. Furthermore, which is not only Suprematist's metaphysical principle but also the expression of universal thoughts; interestingly, which is closely akin to several Oriental mystic ideas including Taoist thoughts, as well as the contents of Universalism including mystic Christianity, by extension, which ideas and principles have a remarkable resemblance with thoughts and principles of Froebel.

The Characteristics on Western Men's Underclothes in the Second Half of the 20C (20세기 후기에 나타난 서양 남성 속옷의 특성)

  • 김주애
    • Journal of the Korean Society of Costume
    • /
    • v.51 no.7
    • /
    • pp.111-121
    • /
    • 2001
  • The purpose of this study was to investigate the historical changes, and analyze functions and characteristics of western men's underclothes in the second half of the 20C. This study will examine how the social backgrounds influenced on the changes of the functions of men's underclothes and how the changes of outer garments were reflected on underclothes in the second half of the 20C. In the early, the second half of the 20C, underwears of functions was continued to cleanliness and comforts. In the later of the 20C, underwears came to be seen as expressing male sexual power when it became body-conscious. By the changes of outer garments. underclothes changed the same size of proportion. In the late 1960's, the turtleneck type of shirts were copied by outer garments, and we understand that underwear can influence on outer garments. The ruffles of the 18th century reappeared in the 1960's. This reactionism of the late 20C tells us about the relation between social environments and underwear. So the social backgrounds influenced on the formativeness of men's underclothes. We understand that underwear can influence on outer garments and outer garments can influence on underwear, too. The important characteristics of the second half of the 20C were the remarkable resemblance of some styles to those of the Past and the occasional blurring of the distinction between underwear and outerwear.

  • PDF

Time- and Frequency-Domain Optimization of Sparse Multisine Coefficients for Nonlinear Amplifier Characterization

  • Park, Youngcheol;Yoon, Hoijin
    • Journal of electromagnetic engineering and science
    • /
    • v.15 no.1
    • /
    • pp.53-58
    • /
    • 2015
  • For the testing of nonlinear power amplifiers, this paper suggests an approach to design optimized multisine signals that could be substituted for the original modulated signal. In the design of multisines, complex coefficients should be determined to mimic the target signal as much as possible, but very few methods have been adopted as general solutions to the coefficients. Furthermore, no solid method for the phase of coefficients has been proven to show the best resemblance to the original. Therefore, in order to determine the phase of multisine coefficients, a time-domain nonlinear optimization method is suggested. A frequency-domain-method based on the spectral response of the target signal is also suggested for the magnitude of the coefficients. For the verification, multisine signals are designed to emulate the LTE downlink signal of 10 MHz bandwidth and are used to test a nonlinear amplifier at 1.9 GHz. The suggested phase-optimized multisine had a lower normalized error by 0.163 dB when N = 100, and the measurement results showed that the suggested multisine achieved more accurate adjacent-channel leakage ratio (ACLR) estimation by as much as 12 dB compared to that of the conventional iterative method.

A Petrological and Geochemical Study of Granites in the Cheju Island (제주도에서 산출되는 화강암에 관한 연구)

  • Ahn, Kun Sang;Lee, Hyun Koo;Lim, Hyun Cheol
    • Economic and Environmental Geology
    • /
    • v.28 no.5
    • /
    • pp.513-518
    • /
    • 1995
  • A granite drilling core (-1200 m) obtained near the Majang cave in east part of the Cheju island. The rock is pinksh in color and has miarolitic cavities. It is coarse-grained rock and consists of quartz, plagioclase, alkali feldspar, biotite and magnetite. The rock shows characteristically micrographic texture. The alkali feldspar is subhedral to anhedral and generally interstitial grains and fonns micrographic texture. K/Ar age of alkali feldspar in the core specimen is $58.14{\pm}1.4Ma $ (early Tertiary). The age, rock features and whole rock chemistry of the rock has strong resemblance to micrographic granites, so called "masanite", in southeastern part of the Korean peninsular. The granitic fragments from drilling core (- 920 m) obtained in Jungmun area in south part of the Cheju island consist of quartz, plagioclase, alkali feldspar and biotite. The fragments in the Jungmun area are similar to granitic xenolith near the Cheju city for the absence of micrographic texture and different alkali feldspar.

  • PDF

Evaluation of Compaction Properties of Subgrade Soil by Gyratory Compaction Curve (선회다짐곡선특성을 이용한 노상토의 다짐도 평가)

  • Lee, Kwan-Ho;Cha, Min-Kyung;Lim, Yu-Jin
    • Journal of the Korean Society of Hazard Mitigation
    • /
    • v.9 no.1
    • /
    • pp.33-40
    • /
    • 2009
  • Compacted soil are used in almost roadway construction with compaction of soil. The direct consequence of soil compaction is densification, which in turn results in higher strength, lower compressibility, and lower permeability. The standard and modified Proctor tests are the most common methods. Both of these tests utilize impact compaction, although impact compaction shows no resemblance to any type of field compaction and is ineffective for granular soils. It has been dramatic advances in field compaction equipment. Therefore, the Proctor tests no longer represent the maximum achievable field density. The main objectives of this research are a survey of current field compaction equipment, laboratory investigation of compaction characteristics, and field study of compaction characteristics. The findings from the laboratory and compaction program were used to establish preliminary guidelines for suitable laboratory compaction procedures.

Study on Agenda-Setting Structure between SNS and News: Focusing on Application of Network Agenda-Setting

  • Kweon, Sang-Hee;Go, Taeseong;Kang, Bo-young;Cha, Min-Kyung;Kim, Se-Jin;Kweon, Hea-Ji
    • International Journal of Contents
    • /
    • v.15 no.1
    • /
    • pp.10-24
    • /
    • 2019
  • This study applied network agenda-setting theory to analyze the impact of the agenda-setting function of the media on certain issues by focusing on the agenda at the center of controversy, 'Creative Economy'. To this end, the study extracted the data referred to creative economy in the media and SNS from 1 January 2008 to 31 December 2014, and analyzed the data using the network analysis program UCINET and the Korean language analysis program Textom. The results of the present study show that, during the period under former President Lee (2008-2011), the media's creative economy agenda-setting function did not exert a significant impact on the agenda-setting within SNS. However, from 2012 when the government of former President Park Geun-hye had started, the agenda-setting function of the media starts to show increasingly strong influence on the agenda cognition in SNS. The central words and sub-words configuration forming the center of the semantic network moved in the direction of a high correlation, in addition to the gradually increasing correlation based on QAP correlation analysis. In 2014, the semantic networks of the media and SNS bore a close resemblance to each other, while the shape of networks and sub-words structure also had a high level of similarity.

Assessment of Bioremediation Potential of Cellulosimicrobium sp. for Treatment of Multiple Heavy Metals

  • Bhati, Tushar;Gupta, Rahul;Yadav, Nisha;Singh, Ruhi;Fuloria, Antra;Waziri, Aafrin;Chatterjee, Sayan;Purty, Ram Singh
    • Microbiology and Biotechnology Letters
    • /
    • v.47 no.2
    • /
    • pp.269-277
    • /
    • 2019
  • In the present study, we have studied the bioremediating capability of bacterial strain against six heavy metals. The strain was isolated from river Yamuna, New Delhi which is a very rich repository of bioremediating flora and fauna. The strain was found to be Gram positive as indicated by Gram staining. The strain was characterized using 16s rRNA gene sequencing and the BlastN result showed its close resemblance with the Cellulosimicrobium sp. As each treatment has its own toxicity eliciting expression of different factors, we observed varied growth characteristics of the bacterial isolate and its protein content in response to different heavy metals. The assessment of its bioremediation capability showed that the strain Cellulosimicrobium sp. has potential to consume or sequester the six heavy metals in this study in the following order iron > lead > zinc > cooper > nickel > cadmium. Thus, the strain Cellulosimicrobium sp. isolated in the present study can be a good model system to understand the molecular mechanism behind its bioremediating capabilities under multiple stress conditions.