Bolted joint torque setting using numerical simulation and experiments

Hsiu-Ying Hwang 대한기계학회 2013 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.27 No.5

In vehicle design process, the torque setting for a bolted joint is mainly determined based on hardware tests. For a newly designed joint of a vehicle, making prototypes and performing tests is expensive and time consuming. Numerical simulation can help predict joint behavior and detect potential failure modes prior to hardware testing. This study developed a numerical simulation using the finite element method to set the installation torque for a joint based on torque-angle signature curves. A three-dimensional detailed model of the joint was constructed. Then, finite element dynamic simulation was used to simulate the installation process of the bolt by gradually applying a torque until the bolt failed. Using these simulations, the torque-angle curves were generated and were used to determine the installation torque of the joint. This was different from the majority of earlier approaches which mainly used hardware tests, two-dimensional or three-dimensional simplified models, and static analyses instead of dynamic analyses. Material nonlinearity and contact were used in the study to capture the joint failure and contact conditions. For comparison, experiments were conducted. The study showed that the finite element analysis accurately predicted the bolt behavior. These results show that numerical simulation can be used to determine torque settings analytically, and can be developed as a standard practice for determining joint torque when designing vehicles.

The Associated Factors of Peripheral Arterial Occlusive Disease in Patients after Kidney Transplantation

Hsiu-Ying Lin,Hsueh-Erh Liu 한국간호과학회 2015 한국간호과학회 학술대회 Vol.2015 No.10

Noise and vibration on the bogie of a mass rapid train

Hsiu-Ying Hwang,Jia-Shiun Chen 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.10

This paper investigated a noise and vibration concern on a metro train while the train made turns. The study was conducted to identify the root causes of the vibration and noise through hardware experimental testing as well as dynamic computer simulation. The initial investigation indicated the noise came from the bogie of the train. It was between the slewing ring bearing and the friction sets. A lab test was established to duplicate the reported problem and to root out the causes. One-factor-at-a-time method was used to screen the main key factors. Under certain contact conditions, unsmooth turning would occur and cause the noise and vibration. Dynamic simulation was proposed in the study to predict the potential issue. A multibody dynamic model was built with train body, underbody, slewing ring bearing and friction set to simulate the train turning motion. The results showed unsmooth/discontinuous dynamic motions and torque oscillation behaviors. The stop-and-go and stick-and-slip motion led to the vibration. The analysis confirmed the unsmooth friction forces and adhesion could cause the noise and vibration. The computer simulation showed good correlation with the hardware testing. It demonstrated the computer dynamic simulation could be used to predict the potential friction induced vibration issues. In the study, a different substitute material was also investigated through the computer simulation. The results showed the vibration could be effectively reduced if ceramic compound friction material was used.

The Excessive Structural Article in Mandarin-Study of dao(到)

( Hsiu Ying Liu ) 한국언어정보학회 2007 학술대회 논문집 Vol.2007 No.-

The present paper targets on the excessive structural article dao in the "X1 + dao + si" phrases, aiming to see the possible generation of the excessive meaning. The generation of excessiveness will be analyzed from the aspect of cognition, including conceptual structure and metaphor. It will be concluded that the position indicated by si in concept plays a crucial, which then tells the importance of collocation. What is more, the comparison of dao and Southern Min kah will be made to see the degree of grammaticalization of dao.

An Exploration of Nurses' Antibiotics Cognition on Hemodialysis Treatment in a Medical Center of Southern Taiwan

Ying-Chen Lee,Hsiu-Yuan LO,Miaofen Yen 한국간호과학회 2005 한국간호과학회 학술대회 Vol.2005 No.10

HPV Vaccine Knowledge and Perceived Risk of Cervical Cancer among Female College Students in Taiwan

Wang, Hsiu-Ho,Wu, Shiao-Ying Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.12

Aims: The study targeted the HPV vaccine knowledge and perceived risk of cervical cancer among female college students in Taiwan as well as the relationship between knowledge of the HPV vaccine and perceived risk of cervical cancer. Materials and Method: The results of this study on female college students are described using descriptive and correlation designs. A convenience sampling approach was employed with a self-filling structured questionnaire. Results: A total of 150 students completed the questionnaire. Values were 7.49 for the mean HPV vaccine knowledge scale and 18.0 for their mean perceived risk of cervical cancer scale. HPV vaccine knowledge was positively correlated with perceived risk of cervical cancer. Conclusions: The findings of this study can serve as a reference for future HPV prevention in Taiwan.

The most ideal interval between blastocyst biopsy and vitrification applied in preimplantation genetic screening (PGS)

( Hui-ying Low ),( Hsiu-hui Chen ),( Chun-chia Huang ),( Tsung-hsien Lee ),( Chung-i Chen ),( Lii-sheng Huang ),( Maw-sheng Lee ) 대한산부인과학회 2016 대한산부인과학회 학술대회 Vol.102 No.-

Study Question: To evaluate the most ideal interval between blastocyst biopsy and vitrification in preimplantation genetic screening (PGS). Study Design, Size, Duration: This is a retrospective study and total 224 patients underwent the PGS from 2012 Dec. to 2015 Mar. All of patients underwent blastocyst vitrification after biopsy and 1~2 euploid blastocyst for transfer after warming. The primary outcome measures were the implantation and pregnancy rates per PGS-frozen embryo transfer cycle. Materials, Setting, Methods: The blastocyst grading including grade 4, 5 and 6 (according to Gardner grading system) on day 5 or day 6 were selected for trophectoderm biopsy. All blastocyst underwent vitrification immediately (interval: 0.5 hour) or 1 to 7 hours after biopsy. At the time of vitrification the grade of blastocyst expansion was also recorded. All patients were divided into two groups according to the grade of expanded (Group1: ≤1/2 expansion (n=41), Group2: ≥3/4 expansion (n=183)). Furthermore, combined two factors including the interval and morphology of blastocyst after biopsy, all patients were further divided into interval 1 (<3 hours and ≤1/2 expansion) and interval 2 (≥3 hours and ≥3/4 expansion). The morphologically best euploid blastocyst(s) (1~2 embryos) was/were selected first for transfer on the next cycle. Main Results: Assessment morphology of blastocyst after biopsy in different interval, at 0.5 hour after biopsy, 100% blastocyst was non-expansion; at 1 hour after biopsy, only 17% blastocyst was 3/4 expansion or all-expansion; at 3 hours after biopsy, 86% blastocyst was 3/4 expansion or all-expansion and after 5.5 hours, 100% blastocyst was all-expansion or hatching. All blastocysts were survival (100%, 359/359) after warming. The mean of embryo transfer number between all groups were no significantly difference. The implantation rate in Group2 (63.4%) was significantly higher than that in Group1 (46.9%, p=0.014). The pregnancy rates in Group4 (73.8%) was sig-nificantly higher than that in Group1 (51.2%, p=0.004). The implantation and pregnancy rates in the group of embryo ≥3/4 expansion combined with ≥3 hours after biopsy (63.6%, 178/280; 73.8%, 127/172) were significantly higher than that in the group of ≤1/2 expansion with <3 hour (45.6, 26/57; 50.0%, 18/36; p=0.0113 and p=0.0056, respectively). Conclusion: The most ideal interval between biopsy and vitrification was least 3 hours and ≥3/4 expansion of blastocyst after biopsy could improve the implantation and pregnancy rates for PGS.

Monitoring changes in the genetic structure of Brown Tsaiya duck selected for feeding efficiency by microsatellite markers

Yi-Ying Chang,Hsiu-Chou Liu,Chih-Feng Chen Asian Australasian Association of Animal Productio 2023 Animal Bioscience Vol.36 No.3

Objective: Few studies have genetically monitored chickens over time, and no research has been conducted on ducks. To ensure the sustainable management of key duck breeds, we used microsatellite markers to monitor Brown Tsaiya ducks over time genetically. Methods: The second, fourth, sixth to eighth generations of the Brown Tsaiya duck selected for feeding efficiency and control lines were included in this study to investigate the genetic variations, effective population size, population structure and the differentiation between populations over time with 11 microsatellite markers derived from Brown Tsaiya duck. Results: The results showed there were a slight decrease in the genetic variations and an increase in within-population inbreeding coefficient (F_IS) in both lines, but no consistent increase in F_IS was observed in each line. The effective population size in the second and eighth generations was 27.2 for the selected line and 23.9 for the control line. The change in allele richness showed a downward trend over time, and the selected line was slightly lower than the control line in each generation. The number of private alleles (N_p) in the selected line were higher than in the control line. Moderate differentiation was observed between the second and eighth generations in the selected line (F_ST = 0.0510) and the control line (F_ST = 0.0606). Overall, differentiation tended to increase with each generation, but genetic variation and structure did not change considerably after six generations in the two lines. Conclusion: This study provides a reference for poultry conservation and helps to implement cross-generation genetic monitoring and breeding plans in other duck breeds or lines to promote sustainable management.

To Evaluate the Duration of Peripheral Intravenous Injection Catheter Devices by Means of Experimental Nursing Operation

Hui Ching Hsu,Hsiu Ying Chen 한국간호과학회 2009 한국간호과학회 학술대회 Vol.2009 No.10

The Global Competitiveness of Taiwan`s Industrial Technology

Wu, Rong I,Lin, Hsiu Ying 이화여자대학교 국제통상협력연구소 2001 Asian International Studies Review Vol.4 No.1/2

For more than a decade, Taiwan has been working actively on programs for the localization of technology. Taiwan is not only ranked the world's third largest supplier of information and technology (IT) products, but it is also ranked fourth in technology and third in innovation according to the 2001 World Economy Forum (WEF) " Global Competitiveness Report." Overall, the competitiveness of Taiwan's technology has been very impressive. Taiwan is not a member of the organization for Economic Cooperation and Development (OECD). With report to Taiwan's technological innovation capability and national competitiveness of each individual industry, the indices to make direct comparison with OECD are still under construction. In consideration of data comparability and availability, this research aims to establish a set of indicators that can be used to compare the competitiveness of Taiwan's industrial technology with other countries, so as to understand the technological performance of Taiwan's industrial technology and its international status. These assessment indices include indicators representing current competitiveness and output (such as patents, licensing feeds and royalties, added values, and export indicators), as well as indicators to represent the input competitiveness index (research and development (R&D) investment and researcher). The method of analysis includes comparing of individual indicators, as well as using patents and market share for cross-analysis, in order to study changes in Taiwan and its competitors. The results of comparison and analysis show that Taiwan experienced a slow downturn on inputs in 2000. In both hi-tech industry as a whole the R&D expenditure growth rate and R&D density were lower than in 1999. Because R &D and innovation are significantly related to Taiwan's future competitiveness, causes for the slack in R&D investment growth need to be confirmed in order for the government to make the industrial policy. AS to the performance on output, patent performance has been outstanding despite the number of granted patents, patent strength, or impact. It reflects the fact that Taiwan has become an important player on the international innovation stage. however, Taiwan's industrial structure is highly concentrated in the information and communication technology (ICT) sector, and the weak demand in the ICT market following the September 11th terrorist attacks in the United States had a serious impact on the export competitiveness of Taiwan's hi-tech industries in 2001. In the future, enhancing the density of industrial technology R&D investmel future risks will be Taiwan's next challenge.