• Title/Summary/Keyword: Common Use

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A Comparative Study on Factor Recovery of Principal Component Analysis and Common Factor Analysis (주성분분석과 공통요인분석에 대한 비교연구: 요인구조 복원 관점에서)

  • Jung, Sunho;Seo, Sangyun
    • The Korean Journal of Applied Statistics
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    • v.26 no.6
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    • pp.933-942
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    • 2013
  • Common factor analysis and principal component analysis represent two technically distinctive approaches to exploratory factor analysis. Much of the psychometric literature recommends the use of common factor analysis instead of principal component analysis. Nonetheless, factor analysts use principal component analysis more frequently because they believe that principal component analysis could yield (relatively) less accurate estimates of factor loadings compared to common factor analysis but most often produce similar pattern of factor loadings, leading to essentially the same factor interpretations. A simulation study is conducted to evaluate the relative performance of these two approaches in terms of factor pattern recovery under different experimental conditions of sample size, overdetermination, and communality.The results show that principal component analysis performs better in factor recovery with small sample sizes (below 200). It was further shown that this tendency is more prominent when there are a small number of variables per factor. The present results are of practical use for factor analysts in the field of marketing and the social sciences.

Tissue Expanders in Staged Calvarial Reconstruction: A Systematic Review

  • Andrea Y. Lo;Roy P. Yu;Anjali C. Raghuram;Michael N. Cooper;Holly J. Thompson;Charles Y. Liu;Alex K. Wong
    • Archives of Plastic Surgery
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    • v.49 no.6
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    • pp.729-739
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    • 2022
  • Cranioplasties are common procedures in plastic surgery. The use of tissue expansion (TE) in staged cranioplasties is less common. We present two cases of cranioplasties with TE and systematically review literature describing the use of TE in staged cranioplasties and postoperative outcomes. A systematic review was performed by querying multiple databases. Eligible articles include published case series, retrospective reviews, and systematic reviews that described use of TE for staged bony cranioplasty. Data regarding study size, patient demographics, preoperative characteristics, staged procedure characteristics, and postoperative outcomes were collected. Of 755 identified publications, 26 met inclusion criteria. 85 patients underwent a staged cranioplasty with TE. Average defect size was 122 cm2, and 30.9% of patients received a previous reconstruction. Average expansion period was 14.2 weeks. The most common soft tissue closures were performed with skin expansion only (75.3%), free/pedicled flap (20.1%), and skin graft (4.7%). The mean postoperative follow-up time was 23.9 months. Overall infection and local complication rates were 3.53 and 9.41%, respectively. The most common complications were cerebrospinal fluid leak (7.1%), hematoma (7.1%), implant exposure (3.5%), and infection (3.5%). Factors associated with higher complication rates include the following: use of alloplastic calvarial implants and defects of congenital etiology (p = 0.023 and 0.035, respectively). This is the first comprehensive review to describe current practices and outcomes in staged cranioplasty with TE. Adequate soft tissue coverage contributes to successful cranioplasties and TE can play a safe and effective role in selected cases.

Complementary Alternative Medicine Use Amongst Breast Cancer Patients in the Northern Region of Peninsular Malaysia

  • Knight, Aishah;Hwa, Yen Siew;Hashim, Hasnah
    • Asian Pacific Journal of Cancer Prevention
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    • v.16 no.8
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    • pp.3125-3130
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    • 2015
  • Background: Breast cancer is a common cancer affecting women in Malaysia and the use of complementary/alternative medicine (CAM) has been associated with delays in getting treatment. The aim of the study was to explore the use of CAM and the influencing factors in the Northern region of Peninsular Malaysia. Materials and Methods: This was a cross-sectional descriptive study on a convenience sample of 100 Malaysian breast cancer survivors. Findings: The reported use of CAM among the breast cancer survivors was lower than in other studies but the types of CAM used had a similar pattern with nutrition supplements/vitamins being the most common. The factors that positively influenced the use of complimentary/traditional therapy were income and getting information from television or radio. Survivors with access to internet/blogs appear to have lower odds of using complimentary/traditional therapy compared to the respondents who reported no such access. Conclusions: Information transmitted via television and radio appears to have a positive influence on CAM use by breast cancer patients compared to other information sources and it is important to ensure that such information is accurate and impartial.

Modal Auxiliary Verbs in Japanese EFL Learners' Conversation: A Corpus-based Study

  • Nakayama, Shusaku
    • Asia Pacific Journal of Corpus Research
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    • v.2 no.1
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    • pp.23-34
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    • 2021
  • This research examines Japanese non-native speakers' (JNNS) modal auxiliary verb use from two different perspectives: frequency of use and preferences for modalities. Additionally, error analysis is carried out to identify errors in modal use common among JNNSs. Their modal use is compared to that of English native speakers within a spoken dialogue corpus which is part of the International Corpus Network of Asian Learners' English. Research findings show at a statistically significant level that when compared to native speakers, JNNSs underuse past forms of modals and infrequently convey epistemic modality, indicating the possibility that JNNSs fail to express their opinions or thoughts indirectly when needed or to convey politeness appropriately. Error analysis identifies the following three types of common errors: (1) the use of incorrect tenses of modal verb phrases, (2) the use of inflected verb forms after modals, and (3) the non-use of main verbs after modals. The first type of error is largely because JNNSs do not master how to express past meanings of modals. The second and third types of errors seem to be due to first language transfer into second language acquisition and JNNSs' overgeneralization of the subject-verb agreement rules to modals respectively.

Ultrasonography of Abdominal Organs in Common Marmoset (Callithrix jacchus) (Common Marmoset(Callithrix jacchus)에서의 복부 초음파에 관한 연구)

  • 김명철;이재일;이수진;김남중;현병화;최양규;이철호
    • Journal of Veterinary Clinics
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    • v.18 no.4
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    • pp.354-357
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    • 2001
  • The purpose of this study is to construct fundamental information about the ultrasonographic diagnosis for extrinsic and intrinsic abdominal disease. Normal ultrasonography of liver, gall bladder, spleen, kidney, urinary bladder, stomach, pylorus, duodenum, and heart of 5 common marmoset(Callithrix jacchus) were determined by use of ultrasonography. One common marmoset was autopsied at the time of euthanasia which is performed 24 hours after ultrasonography, and above mentioned organs were measured actually. In ultrasonography of common marmoset, the gall bladder was 8.2 cm long, and 3.4 cm wide. The width of spleen was 4.3 mm. The right kidney was 22.2 mm long, 16.1 mm wide, and 9.3 deep. The ultrasonographic measurements of the left kidney in calves was similar. The urinary bladder was 8.6 mm long, and 5.0 mm wide.

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A Study on Common Use of Chinese Character Notation of Beam and Purlin (보와 도리의 한자표기(漢字表記) 통용(通用)에 관한 연구)

  • Kim, Jae-Ung;Park, Gang-Chul
    • Journal of architectural history
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    • v.17 no.1
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    • pp.29-46
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    • 2008
  • This study is to present Chinese character notation for common use through investigation of examples and graphonomy related literature with beam and purlin of wooden members and its conclusions are as follows. It suggests two commonly used Chinese characters of beam and purlin. The first method of indicating them is Riyang(樑) for beam and Hang(桁) for purlin and the second method is Bo(保) for beam and Hang(桁) for purlin. Riyang(樑) as the first method was already used in the Joseon period and was profitable to convey limited meaning as wooden term compared to Riyang(樑) with wider meaning and Bo(保) as the second method contained logical association and hieroglyphic connection of Bo(保) as the Korean character. Hang(桁) for purl in was presented by both the first and second methods and it was already used in the Koryeo age, also commonly used as the term of purlin in China and Japan and it was also presented as letter containing logical and hieroglyphic connection with Hyeng(行).

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A treatment utilization of Atopic Dermatitis According to Severity (아토피피부염 환자들의 중증도별 치료 실태)

  • Yun, Young-Hee;Choi, In-Hwa
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.22 no.1
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    • pp.172-180
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    • 2009
  • Objective : to investigate the modalities and treatments with atopic dermatitis. Methods : We made up a questionnaire consisting of symptoms, birth, family history, previous treatments of atopic dermatitis. We interviewed mild to severe 60 atopic dermatitis patients with questionnaire, from August to October, 2008 who were participating in clinical trials of Kyunghee University East-west neo medical center. Results : The results obtained are summarized as follows: 1. 49(81.7%) out of 60 patients reported previous or current use of medical treatment, and most common type of medical treatment was topical corticosteroid (95.9%). Oral antihistamine (61.2%), oral corticosteroid (61.2%) were also commonly used. 2. 31(51.7%) out of 60 patients reported previous or current use of oriental medical treatment, and most common type of oriental medical treatment was herbal medicine(100%). Acupuncture (41.9%), Herbal external supplements (22.6%) were also used. 3. 36(60.11% ) out of 60 patients reported previous or current use of folk remedies, and the most common type of folk remedy was extract of tree(Mokcho-ak)(75.0%). Aloe(61.1%), Charcoal(22.2%) were also commonly used. Conclusion : It seems the frequency of folk remedies used were related to severity of AD. However, there were no significant difference between medical treatment and oriental medical treatment.

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Effective management method of OVSF code using Dynamic Common Channel at Inter-frequency/inter-system handover in UTRR (비동기 시스템의 Inter-frequency/inter-system handover에서 Dynamic Common Channel을 이용한 효율적인 OVSF(Orthogonal Variable Spreading Factor) code 이용 방안)

  • 이종원;구연상;유인호;예정화
    • Proceedings of the IEEK Conference
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    • 2000.06a
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    • pp.13-16
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    • 2000
  • This paper introduces a more effective usage of the limited OVSF cod in compressed mode which is used during inter-frequency/inter-system handover in UTRA(Universal mobile telecommunications system) Terrestrial Radio Access). The usager is to use dynamic common channel which is shared by several users during the compressed mode.

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COMMON FIXED POINTS FOR TWO MAPPINGS WITH EXPANSIVE PROPERTIES ON COMPLEX VALUED METRIC SPACES

  • Piao, Yong-Jie
    • Journal of the Chungcheong Mathematical Society
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    • v.28 no.1
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    • pp.13-28
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    • 2015
  • In this paper, we use two mappings satisfying certain expansive conditions to construct convergent sequences in complex valued metric spaces, and then we prove that the limits of the convergent sequences are the points of coincidence or common fixed points for the two mappings. The main theorems in this paper are the generalizations and improvements of the corresponding results in real metric spaces, cone metric spaces and topological vector space-valued cone metric spaces.

Understanding and Use of $C_{PK}$ and $P_{PK}$ According to the Pattern of Common and Assignable Causes (우연, 이상원인의 유형에 따른 $C_{PK}$, $P_{PK}$의 이해와 적용방안)

  • Choi, Sung-Woon
    • Proceedings of the Safety Management and Science Conference
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    • 2009.11a
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    • pp.549-555
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    • 2009
  • The research proposes two calculation methods for estimating the overall, within and between standard deviation of population. These standard deviations can be used to evaluate the process capability and performance indexes. The guidelines for using $C_{PK}$ and $P_{PK}$ according to the pattern of common and assignable causes are presented.

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