Recent Trends in Risk Management for Transportation Projects

Stewart, Robert B. Korean Institute of Construction Engineering and M 2009 한국건설관리학회 논문집 Vol.10 No.4

최신 수중 탄성파 굴절법(USR)을 이용한 호주의 천부해양탐사 사례연구

Robert J. Whiteley,Simon B. Stewart 한국지구물리탐사학회 2008 지구물리와 물리탐사 Vol.11 No.1

Tolerance of adzuki bean to preplant-incorporated, pre-emergence, and post-emergence herbicides in Ontario, Canada

Stewart, Christie L.,Nurse, Robert E.,Gillard, Chris,Sikkema, Peter H. The Korean Society of Weed Science and The Turfgra 2010 Weed Biology and Management Vol.10 No.1

Weed management options for adzuki-bean growers in Ontario, Canada are limited due to few herbicide registrations. Four field trials were conducted at three locations in south-western Ontario in 2007 and 2008 to determine the tolerance of adzuki bean to several preplant-incorporated (PPI), pre-emergence (PRE), and post-emergence (POST) herbicides. All the herbicides were applied at the doses registered for use in soybean. The application of pendimethalin, cloransulam-methyl, and halosulfuron-methyl (PPI), flumetsulam, cloransulam-methyl, and halosulfuron-methyl (PRE), and acifluorfen and fomesafen (POST)caused ${\leq}15%$ crop injury; however, the injury was transient and did not reduce the adzuki bean yield. The POST application of cloransulam-methyl and imazethapyr caused ${\leq}23%$ crop injury and reduced the biomass by ${\leq}50%$, but did not reduce the plant height or crop yield. Metribuzin, flumetsulam, atrazine, and pyroxasulfone (PPI), metribuzin, linuron, pyroxasulfone, and atrazine (PRE), and bentazon, imazethapyr plus bentazon, halosulfuron-methyl, and thifensulfuron-methyl (POST) caused ${\leq}61%$ crop injury. These treatments reduced the biomass, plant height, and crop yield. Based on these results, pendimethalin, cloransulam-methyl, and halosulfuron-methyl applied PPI, flumetsulam, cloransulam-methyl, and halosulfuron-methyl applied PRE, and acifluorfen and fomesafen applied POST might be potential weed management options for weed management in adzuki bean. Cloransulam-methyl and imazethapyr applied POST will need further evaluation due to phytotoxicity concerns. Metribuzin, flumetsulam, atrazine, and pyroxasulfone applied PPI, metribuzin, linuron, atrazine, and pyroxasulfone applied PRE, and bentazon, imazethapyr plus bentazon, halosulfuron-methyl, and thifensulfuron-methyl applied POST did not have an adequate margin of safety.

최신 수중 탄성파 굴절법(USR)을 이용한 호주의 천부해양탐사 사례연구

Robert J. Whiteley,Simon B. Stewart 대한지구물리학회 2008 지구물리 Vol.11 No.1

Thyroid Stimulating Hormone, Cognitive Impairment and Depression in an Older Korean Population

김재민,Robert Stewart,김선영,배경열,양수진,김성완,신일선,윤진상 대한신경정신의학회 2010 PSYCHIATRY INVESTIGATION Vol.7 No.4

ObjectiveaaAssociations of thyroid dysfunction with cognitive impairment and depression in late-life have been described but remain controversial. This study aimed to investigate the associations of serum thyroid stimulating hormone (TSH) levels with cognitive impairment and depression after controlling for potential confounding factors. MethodsaaThe sample consisted of 495 community residents aged 65 or over in whom serum TSH had been assayed. Cognitive impairment was defined using the Community Screening Interview for Dementia, and depression was diagnosed using the Geriatric Mental State schedule. Age, gender, education, smoking history, physical activity, blood pressure, diabetes, and serum total cholesterol and albumin were included as covariates. ResultsaaThere was a significant association between lower (hyperthyroid) serum TSH levels (<0.5 mIU/L) and cognitive impairment after adjustment [odds ratio 7.12 (95% confidence interval 1.35-37.5)]. However, no association was found between TSH levels and depression. ConclusionaaBased on TSH levels, hyperthyroidism but not hypothyroidism was associated with cognitive impairment in this sample, and we found no evidence for an association of either with depression.

최신 수중 탄성파 굴절법(USR)을 이용한 호주의 천부해양탐사 사례연구

Whiteley, Robert J.,Stewart, Simon B. Korean Society of Earth and Exploration Geophysici 2008 지구물리와 물리탐사 Vol.11 No.1

Underwater seismic refraction with advanced interpretation approaches makes important contributions to shallow marine exploration and geotechnical investigations in Australia's coastal areas. A series of case studies are presented to demonstrate the recent applications of continuous and static USR methods to river crossing and port infrastructure projects at various sites around Australia. In Sydney, static underwater seismic refraction (USR) with bottom-placed receivers and borehole seismic imaging assisted the development of improved geotechnical models that reduced construction risk for a tunnel crossing of the Lane Cove River. In Melbourne, combining conventional boomer reflection and continuous USR with near-bottom sources and receivers improved the definition of a buried, variably weathered basalt flow and assisted dredging assessment for navigation channel upgrades at Geelong Ports. Sand quality assessment with continuous USR and widely spaced borehole information assisted commercial decisions on available sand resources for the reclamation phase of development at the Port of Brisbane. Buried reefs and indurated layers occur in Australian coastal sediments with the characteristics of laterally limited, high velocity, cap layers within lower velocity materials. If these features are not recognised then significant error in depth determination to deeper refractors can occur. Application of advanced refraction inversion using wavefront eikonal tomography to continuous USR data obtained along the route of a proposed offshore pipeline near Fremantle allowed these layers and the underlying bedrock refractor to be accurately imaged. Static USR and the same interpretation approach was used to image the drowned granitic regolith beneath sediments and indurated layers in the northern area of Western Australia at a proposed new berthing site where deep piling was required. This allowed preferred piling sites to be identified, reducing overall pile lengths. USR can be expected to find increased application to shallow marine exploration and geotechnical investigations in Australia's coastal areas as economic growth continues and improved interpretation methods are developed.

Prevalence and Correlates of Problematic Internet Experiences and Computer-Using Time: A Two-Year Longitudinal Study in Korean School Children

양수진,Robert Stewart,이주연,김성완,신일선,윤진상 대한신경정신의학회 2014 PSYCHIATRY INVESTIGATION Vol.11 No.1

Objective To measure the prevalence of and factors associated with online inappropriate sexual exposure, cyber-bullying victimisation,and computer-using time in early adolescence. Methods A two-year, prospective school survey was performed with 1,173 children aged 13 at baseline. Data collected included demographicfactors, bullying experience, depression, anxiety, coping strategies, self-esteem, psychopathology, attention-deficit hyperactivitydisorder symptoms, and school performance. These factors were investigated in relation to problematic Internet experiences andcomputer-using time at age 15. ResultsaaThe prevalence of online inappropriate sexual exposure, cyber-bullying victimisation, academic-purpose computer overuse,and game-purpose computer overuse was 31.6%, 19.2%, 8.5%, and 21.8%, respectively, at age 15. Having older siblings, more weeklypocket money, depressive symptoms, anxiety symptoms, and passive coping strategy were associated with reported online sexual harassment. Male gender, depressive symptoms, and anxiety symptoms were associated with reported cyber-bullying victimisation. Femalegender was associated with academic-purpose computer overuse, while male gender, lower academic level, increased height, and havingolder siblings were associated with game-purpose computer-overuse. Conclusion Different environmental and psychological factors predicted different aspects of problematic Internet experiences andcomputer-using time. This knowledge is important for framing public health interventions to educate adolescents about, and prevent,internet-derived problems.

Insomnia, Depression, and Physical Disorders in Late Life: A 2-year Longitudinal Community Study in Koreans

Kim, Jae-Min,Stewart, Robert,Kim, Sung-Wan,Yang, Su-Jin,Shin, Il,Yoon, Jin-Sang Oxford University Press 2009 SLEEP Vol.32 No.9

Modification by Two Genes of Associations Between General Somatic Health and Incident Depressive Syndrome in Older People :

Kim, Jae-Min,Stewart, Robert,Kim, Sung-Wan,Yang, Su-Jin,Shin, Il-Seon,Yoon, Jin-Sang Ovid Technologies (Wolters Kluwer) - Lippincott Wi 2009 Psychosomatic medicine Vol.71 No.3

<P>OBJECTIVE: To investigate the modifying effects of two candidate genes (serotonin transporter gene linked promoter region (5-HTTLPR) and methylenetetrahydrofolate reductase (MTHFR) C677T polymorphisms) on the associations between general somatic morbidity and incidence of depression in an East Asian population with high frequencies of potential risk alleles. METHODS: With a 2-year prospective study of a community sample (N = 521) of older people (aged 65+), information on baseline number of health complaints, diagnosis of moderate/severe depressive syndrome (Geriatric Mental State), and genotypes for 5-HTTLPR and MTHFR C677T polymorphisms were ascertained. Interactions between somatic morbidity and the two genotypes were investigated for incident depression. RESULTS: Incident depression was present in 63 (12%) and was associated with worse somatic health. Significant interactions between number of somatic complaints and both genotypes were observed. For the 5-HTTLPR genotypes, the association between the number of somatic disorders and depression was significant in s/s homozygotes (chi2 = 8.80 (1 df), p = .003) but not in heterozygotes (chi2 = 0.23, p = .634) or l/l homozygotes (chi2 = 0.04, p = .840). For the MTHFR genotypes, the association between the number of somatic disorders and depression was significant in T/T homozygotes (chi2 = 4.97, p = .026) but not in C/T heterozygotes (chi2 = 1.24, p = .265) or C/C homozygotes (chi2 = 1.04, p = .307). CONCLUSIONS: These findings suggest that associations between general somatic morbidity and late-life depression are modified by at least two genes, and that elders with particular genotypes are at greater risk for onset of depression in the presence of somatic ill health.</P>

Synergistic associations of depression and apolipoprotein E genotype with incidence of dementia

Kim, Jae‐,Min,Stewart, Robert,Kim, Seon‐,Young,Kim, Sung‐,Wan,Bae, Kyung‐,Yeol,Yang, Su‐,Jin,Shin, Il‐,Seon,Yoon, Jin‐,Sang John Wiley Sons, Ltd. 2011 INTERNATIONAL JOURNAL OF GERIATRIC PSYCHIATRY Vol.26 No.9

<P><B>Abstract</B></P><P><B>Objectives</B></P><P>A cohort study of Japanese‐American men suggested interactive effects of depression and apolipoprotein E (APOE) e4 allele on risk of incident dementia. In another sample of East Asian origin, we sought to replicate the findings and to explore individual depressive symptoms where this interaction was most evident.</P><P><B>Methods</B></P><P>Of 625 Korean community elders without dementia at baseline, 518 (83%) were followed over a 2.4‐year period and were clinically assessed for incident dementia. Depression was identified by the Geriatric Mental State Schedule (GMS), and nine individual depressive symptoms relevant to DSM‐IV major depressive episode criteria were extracted. APOE genotype was ascertained. Covariates included age, gender, education, and disability.</P><P><B>Results</B></P><P>There were synergistic interactions between depression and APOE e4 on incident dementia independent of covariates. This interaction was particularly strong for four depressive symptoms: depressed mood, worthlessness, concentration difficulty, and suicidal ideation.</P><P><B>Conclusions</B></P><P>We were able to replicate the previous study, finding that, at least in East Asian origin populations, the APOE e4 allele is a stronger predictor of incident dementia in the presence of depressive syndrome, and particular depressive symptoms. Copyright © 2010 John Wiley & Sons, Ltd.</P>