检索结果-南通市图书馆

Effects of Mo and Zr on Microstructure,Mechanical Properties and Wear Resistance of Fe-Al Based Alloys

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2008年第3期24卷 309-312页

作者： I.D.yeo H.S.Kim Y.G.Yoo W.Y.Kim Advanced Materials R&D Division Korea Institute of Industrial Technology7-47Songdo-dongYeonsu-gu

In this work the microstructure, mechanical properties and wear resistance of Fe-Al based alloys with various alloying elements were studied. The microstructures were examined by optical and scanning electron microscopy （SEM） equipped with an energy dispersive X-ray spectroscope （EDS）. Two types of alloys were prepared by vacuum arc melting. One is Fe-28Al based alloys （D03 structured） with and without alloying elements such as Mo and Zr. The other one is Fe-35Al based alloys （B2 structured） produced with the same manner. For both types of alloys, Mo addition had found to exhibit an equiaxed microstructure, while dendritic structure was observed to show the effect of Zr addition. These microstructural features were more evinced with increasing content of alloying element. Concerning the mechanical properties and wear resistance, Fe-35Al based alloys were superior to Fe-28Al based alloys over the whole temperature range investigated.

关键词： Fe-Al alloy Intermetallic Mechanical properties Wear resistance

Initial Stability Study of Calcium Phosphate Coated Dental Implants

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2005年第B12期20卷 246-248页

作者： Changkook YOU In-sung yeo Tae-kwan EOM M W AHN Sukyoung KIM School of Materials Sci. & Eng. Yeungnam University Gyeongbuk 712-749 Korea Department of Dentistry Special War Command Seoul 138-110 Korea R&D Center Osstem Co. Ltd. Yeonsan-Gu Busan 611-073 Korea Dept.of Orthopedic Surgery College of Medicine Yeungnam Univ. Daegu Korea

Thin film of biodegradable calcium phosphate coated on threaded commercially pure titanium （ cp- Ti ） dental implants has been investigated as one of alternatives to eliminate the problem of the long- term instability of plasma sprayed HA coated implants. In order to compare in-vivo bone-to-implant response behavior among as-machined, HA coated and CMP coated groups, each group was implanted into New Zealand white mature male rabbits for 2 and 6 weeks, and then in-vivo biological behavior was examined in terms of H＆E staining. Initial stability and removable torques of implants were compared among three groups. Measured removable torque of CMP coated specimen at 6 weeks after inplantation was significantly higher than that of non-coated group, but slightly lower than that of HA coated group, without any inflammatory response at the surrounding of the implants. The initial stability （ ISQ value ; implant stability quotient ） of CMP coated specimen at 2 weeks after implantation was slightly lower than that of HA coated group and significantly higher than that of non-coated group. However, after 6 weeks, ISQ value of CMP coated group was slightly higher than that of HA coated group and significantly higher than that of non-coated group.

关键词： calcium metaphosphate initial stability RFA ISQ value osseointegration

Hypothetical hypoxia-driven rapid disease progression in hepatocellular carcinoma post transarterial chemoembolization:A case report

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2023年第19期11卷 4664-4669页

作者： Kai-Fuan yeo Amy Ker Pei-En Kao Chi-Chih Wang Division of Gastroenterology and Hepatology Department of Internal MedicineChung Shan Medical University HospitalTaichung 402306Taiwan China School of Medicine Chung Shan Medical UniversityTaichung 402306TaiwanChina

BACKGROUND Transarterial chemoembolization(TACE)is widely performed for intermediatestage or unresectable hepatocellular carcinoma(HCC),but approximately half of patients do not respond to TACE *** describe a case of rapidly progressing of HCC after TACE and provide a possible hypothesis for this *** finding may contribute to identifying patients who obtain less benefit from TACE,thus avoiding the unnecessary waste of medical resources and treatment during the golden hour *** SUMMARY A 61-year-old woman had been diagnosed with chronic hepatitis B infection and HCC at Barcelona Clinic Liver Cancer stage B,which had been treated by segmental hepatectomy 14 mo *** tumor recurred in the two months after *** received an initial TACE and then underwent systemic therapy with lenvatinib 8 mg daily due to an increased level of alpha-fetoprotein(AFP)after the first ***,the tumor continued to progress with an increased level of AFP,and she underwent a second TACE,after which the tumor volume did not obviously decrease on the contrast-enhanced computed tomography *** month later,she had a third TACE to control the residual HCC *** weeks after that,the HCC had increased dramatically with tea-colored urine and yellowish skin ***,the patient refused further treatment and went into hospice *** Intense hypoxia induced by TACE can trigger rapid disease progression in infiltrative HCC patients with a large tumor burden.

关键词： Carcinoma hepatocellular Transarterial chemoembolization Tumor hypoxia Disease progression Tumor burden Case report

Study on the Relationship between Mental Health Literacy and Psychological Symptoms of University Students: Mediating Effect of Grit

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mental Health Promotion 2023年第7期25卷 813-821页

作者： yeo-Won Jeong Jung-Ha Kim Hyun-Kyeong Park Department of Nursing College of Nursing Dongguk UniversityGyeongju-si38066Korea Aeromedical Center of Korean Air Seoul07505Korea Department of Nursing Graduate SchoolDongguk UniversityGyeongju-si38066Korea

Background:The occurrence of mental health symptoms is higher in individuals aged between 18 and 24 years than in other age *** health literacy is derived from health literacy,and focuses on the knowledge,attitudes,and competencies that individuals need to acquire to manage their own health *** mental health literacy is associated with poorer mental *** is also a known protective factor against mental *** a heightened focus on mental health literacy and grit as important factors for decreasing mental health symptoms,knowledge of the effect of mental health literacy and grit on mental health symptoms is very *** study aimed to evaluate the relationship between mental health literacy and psychological symptoms and the mediating effect of grit on these ***:This cross-sectional descriptive study used survey data from 178 university students in *** were collected between March and May *** SPSS PROCESS macro(Model 4)was used to analyze the ***:Mental health literacy was not directly associated with psychological ***,an indirect pathway was observed between mental health literacy,depression,and anxiety,through ***:Mental health literacy affects psychological symptoms through ***,to improve the mental health of university students,it is necessary to develop programs that increase mental health literacy and grit.

关键词： Depression anxiety psychological stress health literacy mental health students

3D Printing of Polylactic Acid Bioplastic–Carbon Fibres and Twisted Kevlar Composites Through Coextrusion Using Fused Deposition Modeling

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2020年第12期8卷 1671-1680页

作者： J.Y.Tey W.H.yeo Y.J.King W.O.Ding Department of Mechanical and Material Engineering Lee Kong Chian Faculty of Engineering and ScienceUniversiti Tunku Abdul RahmanJalan Sungai LongBandar Sungai LongCheras43000 KajangSelangorMalaysia

Polylactic acid(PLA)bioplastic is a common material used in Fused Deposition Modeling(FDM)3D *** is biodegradable and environmentally friendly biopolymer which made out of ***,it exhibits weak mechanical properties which reduced its usability as a functional prototype in a real-world *** the present study,two PLA composites are created through coextruded with 3K carbon fibres and twisted Kevlar string(as core fibre)to form a fibre reinforced parts(FRP).The mechanical strength of printed parts was examined using ASTM D638 standard with a strain rate of 1 mm/*** has been demonstrated that the FRPs coextruded with 3K carbon fibres had achieved significant improvement in Young’s modulus(+180.6%,9.205 GPa),ultimate tensile strength(+175.3%,103 MPa)and maximum tensile strain(+21.6%,1.833%).Although the Young’s modulus of Kevlar FRP was found to be similar to as compared to unreinforced PLA(~3.29 GPa),it has gained significant increment in terms of maximum tensile strain(+179.7%,104.64 MPa),and maximum tensile strain(+257%,5.384%).Thus,this study revealed two unique composite materials,in which the 3K carbon FRP can offer stiff and high strength structure while Kevlar FRP offers similar strength but at a higher elasticity.

关键词： 3D printing Kevlar fibre 3K carbon fibre coextruded reinforced plastic polylactic acid bioplastic

Choroidal changes in eyes treated with high-dose systemic corticosteroids for optic neuritis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2020年第9期13卷 1430-1435页

作者： Jun Hyuk Lee Ji Young Lee Ho Ra Nam yeo Kang Jiwon Baek Department of Ophthalmology Bucheon St.Mary's HospitalCollege of Medicinethe Catholic University of KoreaGyeonggi-do 14647Republic of Korea Department of Ophthalmology Yeoeuido St.Mary's HospitalCollege of Medicinethe Catholic University of KoreaSeoul 06591Republic of Korea

AIM:To analyze the effect of systemic high-dose corticosteroid on the choroid in patients with unilateral optic ***:A retrospective comparative cohort ***-six eyes of 38 patients with unilateral optic neuritis that received systemic high-dose corticosteroid treatment were *** thickness(CT)and choroidal vascularity index(CVI)were measured in both affected and the fellow eyes at baseline,1 wk.1 and 3 *** in CT and CVI were analyzed in both eyes and compared between ***:The mean CT and CVI were 349μm and 0.70 in the affected eyes and 340μm and 0.69 in the fellow eyes at baseline(P=0.503 and 0.440,respectively).Decrement of CT and CVI at month 3 were significant in affected eyes(P=0.017 and P<0.001).Decreased CVI began 2 wk after treatment whereas CT decreased from 1 *** CVI also decreased significantly in fellow eyes at 3 mo compared to the baseline(P=0.001).CONCLUSION:A significant decrement in CT and CVI can appear after 3 mo in optic neuritis patients treated with high-dose systemic corticosteroid *** decrease in CVI appeared earlier than the decrease in CT,suggesting choroidal vasoconstriction caused by systemic steroid as a possible mechanism.

关键词： corticosteroid optic neuritis choroidal thickness prednisolone

T4 cervical esophageal cancer cured with modern chemoradiotherapy: A case report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2020年第10期8卷 1950-1957页

作者： Chia Ching Lee Chong Ming yeo Wee Khoon Ng Akash Verma Jeremy CS Tey Department of Radiation Oncology National University Cancer InstituteNational University HospitalTan Tock Seng HospitalSingapore 119228Singapore Department of Medical Oncology Tan Tock Seng HospitalSingapore 308433Singapore Department of Gastroenterology and Hepatology Tan Tock Seng HospitalSingapore 308433Singapore Department of Respiratory and Critical Care Medicine Tan Tock Seng HospitalSingapore 308433Singapore

BACKGROUND T4 esophageal cancer portends a poor prognosis,particularly when it is complicated by a tracheoesophageal fistula(TEF)either resulting from disease or occurring as a complication of *** with TEF that occurs during treatment are commonly treated with palliative intent because fistula-associated treatment complications such as aspiration pneumonia and mediastinitis are associated with high morbidity and *** date,there is no clear evidence on the optimal treatment of T4 esophageal cancer,particularly when a TEF formation *** SUMMARY A 67-year-old gentleman who presented with dysphagia and weight *** and imaging revealed a T4N1M0 cervical esophageal squamous cell *** received image-guided intensity-modulated radiation therapy,with concurrent weekly carboplatin(area under curve 2 mg/mL per minute)and paclitaxel(50 mg/m2 of body surface area).One week after treatment initiation(16.2 Gy thus far),he developed cough on swallowing.A TEF was detected on image-guided radiation therapy using cone-beam computed tomography during the treatment course,for which a tracheal stent was *** discussing the risks and morbidity of continuing treatment,he resumed chemoradiotherapy with an additional radiation dose of 45 Gy in 25 *** months after completion of chemoradiotherapy,he developed an esophageal stricture that required esophageal stenting and *** patient remains cancer-free at two year on *** response of esophageal cancer was evident on post-treatment endoscopy and computed tomography imaging,with successful closure of *** This case highlights that successful curative treatment for esophageal cancer complicated by a TEF is possible using novel chemotherapeutic regimens and modern radiation technologies.

关键词： Esophageal cancer Chemoradiotherapy Fistula Stenting T4 Case report

The cortical activation pattern during bilateral arm raising movements

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2017年第2期12卷 317-320页

作者： Sung Ho Jang Jung Pyo Seo Seung-Hyun Lee Sang-Hyun Jin Sang Seok yeo Department of Physical Medicine and Rehabilitation College of Medicine Yeungnam University Daegu Republic of Korea Robot System Research Division Daegu Gyeongbuk Institute of Science & Technology Daegu Republic of Korea Department of Physical Therapy College of Health Sciences Dankook University Cheonan-si Chungnam Republic of Korea

Bilateral arm raising movements have been used in brain rehabilitation for a long time. However, no study has been reported on the effect of these movements on the cerebral cortex. In this study, using functional near infrared spectroscopy（f NIRS）, we attempted to investigate cortical activation generated during bilateral arm raising movements. Ten normal subjects were recruited for this study. f NIRS was performed using an f NIRS system with 49 channels. Bilateral arm raising movements were performed in sitting position at the rate of 0.5 Hz. We measured values of oxyhemoglobin and total hemoglobin in five regions of interest： the primary sensorimotor cortex, premotor cortex, supplementary motor area, prefrontal cortex, and posterior parietal cortex. During performance of bilateral arm raising movements, oxyhemoglobin and total hemoglobin values in the primary sensorimotor cortex, premotor cortex, supplementary motor area, and prefrontal cortex were similar, but higher in these regions than those in the prefrontal cortex. We observed activation of the arm somatotopic areas of the primary sensorimotor cortex and premotor cortex in both hemispheres during bilateral arm raising movements. According to this result, bilateral arm raising movements appeared to induce large-scale neuronal activation and therefore arm raising movements would be good exercise for recovery of brain functions.

关键词： nerve regeneration neuronal activation bilateral arm raising functional NIRS motor control corticospinal tract corticoreticulospinal tract neural regeneration

Cortical activation pattern during shoulder simple versus vibration exercises： a functional near infrared spectroscopy study

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2017年第8期12卷 1294-1298页

作者： Sung Ho Jang Sang Seok yeo Seung Hyun Lee Sang Hyun Jin Mi Young Lee Department of Physical Medicine and Rehabilitation College of Medicine Yeungnam University Daegu Republic of Korea Department of Physical Therapy College of Health Science Dankook University Cheonan-si Republic of Korea Robot System Research Division Daegu Gyeongbuk Institute of Science & Technology Daegu Republic of Korea Department of Physical Therapy College of Health and Therapy Daegu Haany University Gyeongsan-si Republic of Korea

To date, the cortical effect of exercise has not been fully elucidated. Using the functional near infrared spectroscopy, we attempted to compare the cortical effect between shoulder vibration exercise and shoulder simple exercise. Eight healthy subjects were recruited for this study. Two different exercise tasks（shoulder vibration exercise using the flexible pole and shoulder simple exercise） were performed using a block paradigm. We measured the values of oxygenated hemoglobin in the four regions of interest： the primary sensory-motor cortex（SM1 total, arm somatotopy, and leg and trunk somatotopy）, the premotor cortex, the supplementary motor area, and the prefrontal cortex. During shoulder vibration exercise and shoulder simple exercise, cortical activation was observed in SM1（total, arm somatotopy, and leg and trunk somatotopy）, premotor cortex, supplementary motor area, and prefrontal cortex. Higher oxygenated hemoglobin values were also observed in the areas of arm somatotopy of SM1 compared with those of other regions of interest. However, no significant difference in the arm somatotopy of SM1 was observed between the two exercises. By contrast, in the leg and trunk somatotopy of SM1, shoulder vibration exercise led to a significantly higher oxy-hemoglobin value than shoulder simple exercise. These two exercises may result in cortical activation effects for the motor areas relevant to the shoulder exercise, especially in the arm somatotopy of SM1. However, shoulder vibration exercise has an additional cortical activation effect for the leg and trunk somatotopy of SM1.

关键词： nerve regeneration functional near infrared spectroscopy cortical activation shoulder vibrationexercise flexible pole neural regeneration