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On Effective Campus Attack Response:Insights from Agent-Based Simulation for Improving Emergency Information Sharing System Design and Response Strategy

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International Journal of Disaster Risk Science 2022年第3期13卷 435-447页

作者： Steven Beattie Jing Yang Sunny Xi wai kin Victor chan Tsinghua-Berkeley Shenzhen Institute Tsinghua UniversityShenzhen518055China

Information sharing systems are a critical component of emergency response—especially in campus attack situations that unfold very *** design of effective information sharing systems is often difficult,however,due to a lack of data on these assault *** work takes an agent-based approach to simulate three campus emergency information sharing system design alternatives in the context of a college campus knife attack,and incorporates data from on-campus student surveys and parameter tuning *** are evaluated according to:(1)improved student attack response outcomes;and(2)effective institutional response to the *** results confirm that increased awareness supports rapid emergency reporting,but an important gap exists between students'awareness and their ability to respond effectively,which depends on a number of campus-specific factors.A strong positive impact is seen from safe and efficient information sharing with *** impact depends largely on reporting system implementation qualities,as opposed to campus-specific *** a campus in China,WeChat was used as a basis for messaging *** simulation results show a 9%drop in casualties and a 22%faster police response time from a text-based reporting system using‘‘base''WeChat features instead of traditional phone *** results also project a 30%drop in casualties and 52%faster police response time using a system designed around a WeChat Mini Program or standalone campus emergency reporting *** outcomes suggest a number of recommendations for improving outdated campus emergency information-sharing systems and response strategies.

关键词： Agent-based impact analysis Agent-based modeling Campus security Emergency response Information sharing

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Small Molecule Organic Nanostructures—Fabrication and Properties

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Journal of Materials Science & Technology 2008年第4期24卷 563-568页

作者： A.B.Djurii A.M.C.Ng Kai-Yin CHEUNG Man-kin FUNG wai-kin chan Department of Physics University of Hong KongPokfulam RoadHong KongHong Kong SARChina Department of Chemistry University of Hong KongPokfulam RoadHong KongHong Kong SARChina

Organic materials are of great interest for the development of low cost electronic and optoelectronic devices. Although majority of research on organic materials is concerned with synthesis of novel compounds and organic thin films, organic nanostructures are attracting increasing interest in recent years. We briefly review different growth methods of organic nanostructures, which can be roughly divided into vapor deposition methods and self-assembly techniques in solution. Then we highlight some interesting properties of organic nanostructures, as well as possible applications, includinf field emission, electronic and optoelectronic devices.

关键词： Organic nanostructures Self-assembly Vapor deposition

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Colonoscopy in Hong Kong Chinese children

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World Journal of Gastroenterology 2010年第9期16卷 1119-1122页

作者： Yuk Him Tam Kim Hung Lee kin wai chan Jennifer Dart Yin Sihoe Sing Tak Cheung Jennifer wai Cheung Mou Division of Paediatric Surgery & Paediatric Urology Department of SurgeryPrince of Wales HospitalThe Chinese University of Hong Kong

AIM:To investigate the safety and diagnostic yield of colonoscopy in Chinese children in whom the procedure is not often ***:We conducted a retrospective review of all colonoscopies in consecutive children who underwent their fi rst diagnostic colonoscopy from Jan 2003 to ***:Seventy-nine children (48 boys,31 girls;mean age 9.2 ± 4.2 years) were identified and reviewed with a total of 82 colonoscopies *** caecal and ileal intubation rates were 97.6% and 75.6% *** patients (50.6%) had a positive diagnosis made in colonoscopy and that included colonic polyps (23),Crohn's disease (12),ulcerative colitis (1),and miscellaneous causes (4).80% of polyps were in the rectosigmoid *** but one were juvenile hamartomatous *** exceptionwas an adenomatous *** mean ages for children with inflammatory bowel disease (IBD) and polyps were 11.3 and 4.3 years *** was no procedure-related ***:Colonoscopy is a safe procedure in our Chinese *** increasing diagnosis of IBD in recent decades may reflect a rising incidence of the disease in our children.

关键词： Colonoscopy Children Inflammatory bowel disease Colonic polyps

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Laparoscopic excision of Meckel's diverticulum in children:What is the current evidence?

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World Journal of Gastroenterology 2014年第41期20卷 15158-15163页

作者： kin wai Edwin chan Kim Hung Lee Hei Yi Vicky Wong Siu Yan Bess Tsui Yuen Shan Wong Kit Yi Kristine Pang Jennifer wai Cheung Mou Yuk Him Tam Division of Paediatric Surgery and Paediatric Urology Department of SurgeryThe Prince of Wales HospitalThe Chinese University of Hong Kong

Complications aroused from Meckel’s diverticulum tend to developed in children. Children presented with abdominal pain, intestinal obstruction, intussusception or gastrointestinal bleeding may actually suffered from complicated Meckel’s diverticulum. With the advancement of minimally invasive surgery (MIS) in children, the use of laparoscopy in the diagnosis and subsequent laparoscopic excision of Meckel’s diverticulum has gained popularity. Recently, single incision laparoscopic surgery (SILS) has emerged as a new technique in minimally invasive surgery. This review offers the overview in the development of MIS in the management of children suffered from Meckel’s diverticulum. The current evidence in different laparoscopic techniques, including conventional laparoscopy, SILS, the use of special laparoscopic instruments, intracorporeal diverticulectomy and extracorporeal diverticulectomy in the management of Meckel’s diverticulum in children were revealed.

关键词： Laparoscopy Meckel’ s diverticulum Children

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Cystic meconium peritonitis with jejunoileal atresia:Is it associated with unfavorable outcome?

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World Journal of Clinical Pediatrics 2017年第1期6卷 40-44页

作者： kin wai Edwin chan Kim Hung Lee Hei Yi Vicky Wong Siu Yan Bess Tsui Yuen Shan Wong Kit Yi Kristine Pang Jennifer wai Cheung Mou Yuk Him Tam Division of Paediatric Surgery and Paediatric Urology Department of Surgerythe Prince of Wales Hospitalthe Chinese University of Hong Kong

AIM To compare the outcome between patients with jejunoileal atresia(JIA) associated with cystic meconium peritonitis(CMP) and patients with isolated JIA(JIA without CMP).METHODS A retrospective study was conducted for all neonates with JIA operated in our institute from January 2005 to January *** including the gestation age,sex,birth weight,age at operation,the presence of associated syndrome was *** outcome including the type of operation performed,operative time,the need for reoperation and mortality were *** demographics and the outcome between the 2 groups were *** During the study period,53 neonates had JIA underwent operation in our *** neonates(32%) were associated with *** was no statistical difference on the demographics in the two *** with CMP had earlier operation than patients with isolated JIA(mean 1.4 d vs 3 d,P = 0.038).Primaryanastomosis was performed in 16 patients(94%) with CMP and 30 patients(83%) with isolated JIA(P = 0.269).Patients with CMP had longer operation(mean 190 min vs 154 min,P = 0.004).There were no statistical difference the need for reoperation(3 vs 6,P = 0.606) and mortality(2 vs 1,P = 0.269) between the two *** Primary intestinal anastomosis can be performed in94% of patients with JIA associated with *** patients with CMP had longer operative time,the mortality and reoperation rates were low and were comparable to patients with isolated JIA.

关键词： Meconium Peritonitis Atresia Jejunoileal

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Casein kinase-2 inhibition promotes retinal ganglion cell survival after acute intraocular pressure elevation

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Neural Regeneration Research 2024年第5期19卷 1112-1118页

作者： Meng Wang Shi-Qi Yao Yao Huang Jia-Jian Liang Yanxuan Xu Shaowan Chen Yuhang Wang Tsz kin Ng wai Kit Chu Qi Cui Ling-Ping Cen Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong ShantouGuangdong ProvinceChina Shantou University Medical College ShantouGuangdong ProvinceChina Beijing Tongren Eye Center Beijing Tongren HospitalCapital Medical UniversityBeijingChina Department of Ophthalmology and Visual Sciences The Chinese University of Hong KongHong Kong Special Administrative RegionChina

Intraocular pressure elevation can induce retinal ganglion cell death and is a clinically reversible risk factor for glaucoma,the leading cause of irreversible *** previously demonstrated that casein kinase-2 inhibition can promote retinal ganglion cell survival and axonal regeneration in rats after optic nerve *** investigate the underlying mechanism,in the current study we increased the intraocular pressure of adult rats to 75 mmHg for 2 hours and then administered a casein kinase-2 inhibitor(4,5,6,7-tetrabromo-2-azabenzimidazole or 2-dimethylamino-4,5,6,7-tetrabromo-1H-benzimidazole)by intravitreal *** found that intravitreal injection of 4,5,6,7-tetrabromo-2-azabenzimidazole or 2-dimethylamino-4,5,6,7-tetrabromo-1H-benzimidazole promoted retinal ganglion cell survival and reduced the number of infiltrating *** analysis showed that the mitogen activated protein kinase signaling pathway was involved in the response to intraocular pressure elevation but was not modulated by the casein kinase-2 ***,casein kinase-2 inhibition downregulated the expression of genes(Cck,Htrsa,Nef1,Htrlb,Prph,Chat,Slc18a3,Slc5a7,Scn1b,Crybb2,Tsga10ip,and Vstm21)involved in intraocular pressure *** data indicate that inhibition of casein kinase-2 can enhance retinal ganglion cell survival in rats after acute intraocular pressure elevation via macrophage inactivation.

关键词： casein kinase-2 glaucoma intraocular pressure elevation macrophages retinal ganglion cells

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A case of secretory breast carcinoma with ETV6-NTRK3 fusion gene during childhood

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镜湖医学 2024年第1期24卷 62-63,F0004页

作者： TAI wai Meng chan kin Iong WONG Peng Hong XU De Li WEN Jian Ming Department of Pathology Kiang Wu HospitalMacao SARChina Department of Surgery Kiang Wu HospitalMacao SARChina

Secretory carcinoma is a rare breast *** report a case of secretory carcinoma occurred in childhood.A 7-year-old girl had a history of a mass in the breast for 4 *** tumor grew slowly and well circumscribed,mimicking benign lesions on *** breast lumpectomy,a diagnosis of secretory carcinoma was made based on its histological morphology,immunohistochemical reaction,and molecular ***,we report the process of diagnosis,and treatment of this rare case.

关键词： diagnosis carcinoma lesions

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Successful capture of red thrombus in acute inferior ST-elevation myocardial infarction

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Journal of Geriatric Cardiology 2018年第10期15卷 647-648页

作者： wai-kin CHI Chi-Yuen chan Division of Cardiology Department of Medicine and TherapeuticsPrince of Wales Hospitalthe Chinese University of Hong KongHong KongChina

A 50-year-old gentleman with past medical history of hypertension presented with acute inferior ST-segment elevation myocardial infarction (STEMI).He complained severe chest pain despite onset time was more than *** p... 详细信息

关键词： Embolic protection device Successful capture Thrombus

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Use of laparoscopy as the initial surgical approach of impalpable testes:10-year experience

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World Journal of Clinical Pediatrics 2015年第4期4卷 155-159页

作者： kin wai Edwin chan Kim Hung Lee Hei Yi Vicky Wong Siu Yan Bess Tsui Yuen Shan Wong Kit Yi Kristine Pang Jennifer wai Cheung Mou Yuk Him Tam Division of Paediatric Surgery and Paediatric Urology Department of Surgerythe Prince of Wales Hospitalthe Chinese University of Hong Kong

AIM: To review the experience in the management of impalpable testes using laparoscopy as the initial approach and the need for inguinal ***: From January 2004 to June 2014, 339 patients with undescended testes underwent operation in our institute. Fifty patients(15%) had impalpable testes. All children with impalpable testes underwent initial laparoscopy. A retrospective review was conducted on this group of patients and the outcome was ***: Forty children had unilateral impalpable testis. Ten children had bilateral impalpable testes. Thirty-one children(78%) in the unilateral group underwent subsequent inguinal exploration while 4 children(40%) in the bilateral group underwent inguinal exploration(P < 0.05). Orchidopexy was performed in 16 children(40%) in the unilateral group and 9 children(90%) in the bilateral group(P < 0.05). Regarding the 24 children with unilateral impalpable testis and underwent orchidectomy for testicular nubbin(n = 19) or atrophic testes(n = 2) or has vanishing testes(n = 3); contralateral testicular hypertrophy was noticed in 10(41%). No intra-operative complication was encountered. Two children after staged Fowler-Stephensprocedure and 1 child after inguinal orchidopexy had atrophic ***: The use of laparoscopy in children with impalpable testes is a safe procedure and can guide the need for subsequent inguinal exploration. Children with unilateral impalpable testis were associated with an increased need for inguinal exploration after laparoscopy. Orchidopexies could be performed successfully in 90% of children with bilateral impalpable testes.

关键词： Laparoscopy Impalpable Testis Inguinal

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Clinicopathological survey of 23 patients with lacrimal fossa lesions in Hong Kong

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International Journal of Ophthalmology(English edition) 2011年第3期4卷 311-313页

作者： Danny Siu-Chun Ng Edwin chan kin Yau Clement wai-Nang chan Department of Ophthalmology Tung Wah Eastern Hospital

AIM: To survey the clinicopathological correlations of lacrimal fossa lesions in the Hong Kong population. METHODS: A total of 23 patients with lacrimal fossa lesions were identified radiologically. The mean age at the time of diagnosis was 52 year-old. The medical records of patients diagnosed with lacrimal fossa lesions and subsequently underwent radiological investigations were collected and reviewed retrospectively throughout a six years period from 2000 to 2006 from three regional hospitals (Tung Wah Eastern Hospital, Pamela Youde Nethersole Eastern Hospital and Queen Mary Hospital) belonging to the Hong Kong Mega Cluster. Patient demographics, presenting signs and symptoms, imaging modalities, pathological reports and subsequent management were recorded. RESULTS: The most common initial presenting symptom was upper lid swelling (83%) followed by proptosis (13%). 19 patients (83%) had benign lacrimal fossa lesion and 4 patients (17%) had malignancy. Three of the malignancies were lymphomas and one was adenoid cystic carcinoma. CONCLUSION: Age is an important factor in considering the differential diagnosis of lacrimal fossa lesion. Lymphoproliferative diseases have the highest incidence in patients over 60 years of age while inflammatory lesions are more common in younger patients in Hong Kong.

关键词： lacrimal gland tumor lymphoma

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