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Siu Hua Chang 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.50 No.-
Separation of Cu(II) ions from aqueous solutions using an innovative waste vegetable oil-basedcontinuous liquid membrane (WVCLM) was studied with waste vegetable oil as diluent,di-2-ethylhexylphosphoric acid (D2EHPA) as carrier and sulphuric acid (H2SO4) as stripping phase. For an initial Cu(II) ion concentration of 500 mg/L, the maximum percentages of extraction (96%) andstripping (80%) were achieved in 8 h and 24 h, respectively, with feed phase buffered at pH 4.5, 250 mM ofinert salt, 88 mM of D2EHPA, 1.5 M of H2SO4, 2.5 L/h of membrane phase, 4.0 L/h of feed phase and 0 L/h ofstripping phase.
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Siu-Cheung Chan,Winnie Chiu-Wing Chu,Kar-Wai Liu,Chun-Ta Liao,Tsung-Shih Lee,Shu-Hang Ng 대한영상의학회 2011 Korean Journal of Radiology Vol.12 No.2
Objective: We wanted to report on our experience with modified radiology-guided percutaneous gastrostomy (MRPG) without endoscopic or nasogastric access for treating patients with complete obstruction of the upper digestive tract. Materials and Methods: Fourteen oncology patients (13 had hypopharyngeal cancer and 1 had upper esophageal cancer) with complete obstruction of the upper digestive tract were recruited. Conventional percutaneous endoscopic gastrostomy (PEG) and radiologic (fl uoroscopy-guided) percutaneous gastrostomy (RPG) were not feasible in all the patients. An MRPG technique (with a combination of ultrasound, an air enema and fl uoroscopic guidance) was performed in these patients. Results: We achieved successfully percutaneous gastrostomy using the modifi ed technique in all patients without any major or minor complications after the procedure. Conclusion: A modifi ed radiology-guided percutaneous gastrostomy technique can be safely performed in patients who failed to receive conventional PEG or RPG due to the absence of nasogastric access in the completely obstructed upper digestive tract. Objective: We wanted to report on our experience with modified radiology-guided percutaneous gastrostomy (MRPG) without endoscopic or nasogastric access for treating patients with complete obstruction of the upper digestive tract. Materials and Methods: Fourteen oncology patients (13 had hypopharyngeal cancer and 1 had upper esophageal cancer) with complete obstruction of the upper digestive tract were recruited. Conventional percutaneous endoscopic gastrostomy (PEG) and radiologic (fl uoroscopy-guided) percutaneous gastrostomy (RPG) were not feasible in all the patients. An MRPG technique (with a combination of ultrasound, an air enema and fl uoroscopic guidance) was performed in these patients. Results: We achieved successfully percutaneous gastrostomy using the modifi ed technique in all patients without any major or minor complications after the procedure. Conclusion: A modifi ed radiology-guided percutaneous gastrostomy technique can be safely performed in patients who failed to receive conventional PEG or RPG due to the absence of nasogastric access in the completely obstructed upper digestive tract.
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Body Shape Perception and Body Mass Index among Female Adults in Hong Kong
( Siu Kuen Robert Ng ) 한국체육학회 2015 국제스포츠과학 학술대회 Vol.2015 No.1
Purpose: The purposes of this study are to investigate the relationship between different weight status as measured by body mass index (BMI) and the perception of body shape among female college students. Method: 1361 females (ranged: 17- 61; mean age = 22.5 ± 9.9 years old) at two universities in Hong Kong participated in the study. They were asked to complete the Photographic Figure Rating Scale (PFRS; Swami et al., 2008). The PFRS is a figural rating scale that depicts 10 front-view, photographic images of women ranging in body size from emaciated (1) to obese (10). All images were presented in greyscale, with faces obscured, and in standard clothing. Participants were asked to rate the figure that 1) most closely matched their own body, 2) they would most like to possess, 3) most physically attractive, 4) they think men of their age find most physically attractive, 5) represent the body that is typical for women of their age. Weight discrepancy was calculated by their current minus ideal ratings. A series of analysis of variance (ANOVA) was performed to investigate any significant differences among respondents with the four BMI categories [underweight, UW (<18.5); normal weight, NW (18.5-22.9); overweight, OW (23-26.9); obese, OB (>27.0)] on 1) their current, 2) their ideal, 3) most physically attractive, 4) they think men of their age find most physically attractive, 5) represent the body that is typical for women of their age. An alpha level of 0.05 was employed for all statistical tests. Results: Results of ANOVA show that there are statistically significant body shape perception differences among females with four BMI categories. OW respondents reported their perceived "attractive" figures significantly bigger size than their UW and NW counterparts (F(3,1357) = 11.731, p = .00). OW females rated larger figure as "men of their age find most physically attractive" than their NW counterparts (F(3,1355) = 4.448, p = .004). OW and OB women reported bigger size as "typical for women of their age" and their "ideal" compared to their UW and NW counterparts (F(3,1357) = 22.480, p = .00). The BID of respondents increased with their BMI (F(3,1351) = 163.59, p = .00), their age and their indicated "current" figures. All the females regardless of their age, BMI and current figure chose between no. 3 and no. 4 figure as their "ideal", "most physically attractive" and "men of their age find most physically attractive". Conclusion: Firstly, all females regardless of their BMI categories in the present study indicated their desires to be thinner. The vast majority of the overweight (93.7%) and obesity (90.9%) women showed their intention to be thinner. Special attention is drawn to underweight (38.5%) and normal weight (32.7%) females who showed their intentions to lose weight. Their further weight loss will pose a serious hazard to their health. Secondly, their body image discrepancy increased with their BMI and age. Finally, this study highlights such a necessity of helping female adults in Hong Kong to develop a healthy and realistic body image. It also avoids them to develop eating disorder and body image dissatisfaction.
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Development and characterization of mouse small intestinal enteroids
Siu Lee,Na-Yeon Gu,Se-A Lee,Jienny Lee,Yoon-Hee Lee,Bang-Hun Hyun 한국예방수의학회 2020 예방수의학회지 Vol.44 No.2
The culture of the intestinal epithelium into three dimensional (3D) structures typically termed organoid culture. Organoid culture is based on the ability of intestinal stem cells (ISCs), at the base of the crypt, perpetually to divide and produce a fully differentiated, polarized epithelium. Leucine-rich-repeat-containing G-protein-coupled receptor 5 (Lgr5) positive ISCs isolated from the intestine can form organoids in long-term culture. Thus, when cultured under the appropriate 3D conditions, single Lgr5⁺ ISCs undergo cycles of self-renewal, differentiation and morphogenesis, and self-organize into crypt-villus domains that house cycling ISCs and differentiated intestinal epithelial cells (IECs). In this study, we performed isolation, characterization and consecutive subculture of small intestinal crypts from BALB/c-nude mouse. Briefly, isolated mouse crypts were embedded in matrigel, cast into 40 μL droplets at the bottom of well in a 48-well plate. Following polymerization, the gels were overlaid with ISCs expansion medium containing B27, N2, N-acetylcysteine, epidermal growth factor, noggin, and R-spondin 1. As a result, mouse crypt-derived ISCs had enteroids and spheroid morphologies. We also confirmed by quantitative real-time RT-PCR that expression of ISCs-related specific genes (Lgr5, sox9) and IECs-related specific genes (chromogranin A, defensin-5, mucin-1, mucin-2, and villin) was maintained at eight passages or more. Thus, we observed that expression of specific markers and consecutive self-renewing in the mouse small intestinal crypt-derived organoids.
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Siu Man Keung 한국수학사학회 2020 Journal for history of mathematics Vol.33 No.5
HPM (History and Pedagogy of Mathematics) activities deal with integrating the history of mathematics with the teaching and learning of mathematics. As a teacher of mathematics the author will share his personal experience in the engagement of HPM activities during the past forty-five years with fellow teachers who are interested in such activities and who may wish to know how another teacher goes about doing it.
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Developing a Career Decision Making Scale for Chinese Students
Siu Man R Ting 한국상담학회 2013 Journal of Asia Pacific counseling Vol.3 No.1
Career-related decision making of Chinese students was explored through a new instrument, the Chinese Career Decision Making (CCDM). In this study, 345 freshmen (126 men and 219 women) at a university in southern mainland China, and another sample of 253 high school students in Hong Kong, responded to the CCDM. In the factor analysis, the preliminary findings show good reliability and validity across nine to ten factors, including traditional culture orientation, family expectation, peer advising, role model, and self-efficacy. Implications for career counseling practice and theory, as well as the limitations of the study, are discussed.
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SIU, Man-Keung The Korean Society for History of Mathematics 2015 Journal for history of mathematics Vol.28 No.6
In 1613 the official-scholar LI Zhi-zao (李之藻) of the Ming Dynasty, in collaboration with the Italian Jesuit Matteo RICCI (利瑪竇), compiled the treatise Tongwen Suanzhi (同文算指). This is the first book which transmitted into China in a systematic and comprehensive way the art of written calculation that had been in common practice in Europe since the sixteenth century. This paper tries to see what pedagogical lessons can be gleaned from the book, in particular on the basic operations in arithmetic and related applications in various types of problems which form the content of modern day mathematics in elementary school education.
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Evershed and Counter-Evershed Flows in Sunspot MHD Simulations
Siu-Tapia, A. L.,Rempel, M.,Lagg, A.,Solanki, S. K. American Astronomical Society 2018 The Astrophysical journal Vol.852 No.2
<P>There have been a few reports in the literature of counter-Evershed flows observed in well-developed sunspot penumbrae, i.e., flows directed toward the umbra along penumbral filaments. Here, we investigate the driving forces of such counter-Evershed flows in a radiative magnetohydrodynamic simulation of a sunspot, and compare them to the forces acting on the normal Evershed flow. The simulation covers a timespan of 100 solar hours and generates an Evershed outflow exceeding 8 km s(-1) in the penumbra along radially aligned filaments where the magnetic field is almost horizontal. Additionally, the simulation produces a fast counter-Evershed flow (i.e., an inflow near tau = 1) in some regions within the penumbra, reaching peak flow speeds of similar to 12 km s(-1). The counter-Evershed flows are transient and typically last a few hours before they turn into outflows again. By using the kinetic energy equation and evaluating its various terms in the simulation box, we found that the Evershed flow occurs due to overturning convection in a strongly inclined magnetic field, while the counter-Evershed flows can be well-described as siphon flows.</P>
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Digital Health in Southeast Asia: Startups and Digital Technology Applications
Siu Loon Hoe 아시아기술혁신학회 2022 Asian Journal of Innovation and Policy Vol.11 No.2
The purpose of this article is to provide preliminary findings on the state of digital technology applications of startups in Southeast Asia and to discuss issues related to digital health adoption in the region. This exploratory study is based on an empirical analysis of startups and digital technology applications information from various publicly available website databases. Public and private organizations would benefit from a better understanding of the current state of digital technology applications provided by startups and the challenges faced in digital health adoption. This article contributes to the existing literature by offering an overview of startups and digital technology applications in the digital health space in the fast-growing region of Southeast Asia. It offers advice to organizations intending to pursue healthtech initiatives on the types of health services provided by startups and issues that need to be addressed to increase the adoption rate.
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