scholarly journals Dependence of the integral characteristics of a nematic light modulator on the physical parameters of a liquid crystal

2021 ◽  
Vol 2056 (1) ◽  
pp. 012027
Author(s):  
G V Simonenko
Keyword(s):  
Boundary Conditions ◽  
Response Time ◽  
Twist Angle ◽  
Contrast Ratio ◽  
Dielectric Anisotropy ◽  
Physical Parameters ◽  
High Contrast ◽  
Total Response ◽  
Total Response Time ◽  
Integral Characteristics

Abstract In the present work, the effect of physical constants of an LC material on the integral characteristics of a modulator operating in a waveguide mode in an LC structure with a twist angle of 270 and antisymmetric boundary conditions in the working cell was studied using the method of computer simulation. It is shown that, under antisymmetric boundary conditions, the small value of the total response time of the LC modulator is due to the absence of a “backflow” in the LC cell and the role of only half of the LC working gap thickness in the dynamics of switching between two states in such a device. In addition, it was found that in order to simultaneously achieve high contrast ratios and a short total response time of the device, it is necessary to choose an LC material with a high value of its dielectric anisotropy. In this case, there is an optimal set of elasticity constants for the LC material, which simultaneously realizes a high contrast ratio and a short total response time of the modulator.

scholarly journals Effect of Olympic Weight Category on Performance in the Roundhouse Kick to the Head in Taekwondo

2012 ◽  
Vol 31 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Isaac Estevan ◽  
Coral Falco ◽  
Octavio Álvarez ◽  
Javier Molina-García
Keyword(s):  
Response Time ◽  
Impact Force ◽  
Large Impact ◽  
Relative Impact ◽  
Total Response ◽  
Male Athletes ◽  
Weight Category ◽  
Total Response Time

Effect of Olympic Weight Category on Performance in the Roundhouse Kick to the Head in TaekwondoIn taekwondo, kick performance is generally measured using impact force and time. This study aimed to analyse performance in the roundhouse kick to the head according to execution distance between and within Olympic weight categories. The participants were 36 male athletes divided into three categories: featherweight (n = 10), welterweight (n = 15) and heavyweight (n = 11). Our results show that taekwondo athletes in all weight categories generate a similar relative impact force. However, the results indicate that weight has a large impact on kick performance, particularly in relation to total response time.

scholarly journals An M/G/l queueing system with fixed feedback policy

2002 ◽  
Vol 44 (2) ◽  
pp. 283-297 ◽  
Author(s):  
Bong Dae Choi ◽  
Bara Kim
Keyword(s):  
Response Time ◽  
Generating Function ◽  
Queueing System ◽  
Probability Generating Function ◽  
Joint Probability ◽  
Fixed Number ◽  
Single Server ◽  
Total Response ◽  
Stieltjes Transform ◽  
Total Response Time

We consider a single server queueing system where each customer visits the queue a fixed number of times before departure. A customer on his j th visit to the queue is defined to be a class-j -customer. We obtain the joint probability generating function for the number of class-j-customers and also obtain the Laplace-Stieltjes transform for the total response time of a customer.

scholarly journals Serviço de atendimento móvel de urgência do Rio Grande do Sul

2020 ◽  
Vol 11 (2) ◽  
Author(s):  
Magda Regina Dorr ◽  
Gabriella Barbosa Nadas ◽  
Celia Sapin Duarte ◽  
Cristiane Damiani Tomasi ◽  
Lisiane Tuon
Keyword(s):  
Response Time ◽  
Rural Areas ◽  
Rio Grande ◽  
User Profile ◽  
State Regulation ◽  
Rio Grande Do Sul ◽  
Total Response ◽  
Health Services Administration ◽  
Total Response Time ◽  
Day Of The Week

Objetivo: analisar os atendimentos realizados na Central de Regulação de Urgência/SAMU do Estado do Rio Grande do Sul no período de 2016 e 2017. Metodologia: estudo observacional, descritivo e retrospectivo com abordagem quantitativa. Foram coletados os dados sobre perfil do usuário, dia da semana, classificação de risco, tipo do agravo, tempo médio de atendimento às solicitações, quantitativo de desistência da solicitação e número de chamados não regulados por falta de equipes ou veículos. Resultados: o número de solicitações por motivos clínicos foi 53.8%, destes 51,6% foram média gravidade. A prevalência foi do sexo masculino e idade entre 18 e 29 anos. Em 84,7% dos chamados solicitou-se suporte básico. O tempo resposta total foi entre 30 minutos e 1 hora, maior que o recomendado de acordo com a média nacional, seja nas as zonas urbanas ou rurais. Conclusão: este serviço necessita reduzir o tempo resposta de atendimento das solicitações.Palavras-chave: SAMU; Indicadores; Central de Regulação Estadual; Serviços Médicos de Emergência; Administração de Serviços de Saúde. Objective: to analyze the attendances performed at the Emergency Regulation Center / SAMU of the State of Rio Grande do Sul in 2016 and 2017, focusing in response time. Methodology: observational, descriptive and retrospective study with quantitative approach. Data were collected on user profile, day of the week, risk classification, type of grievance, average time to respond to requests, amount of withdrawal and number of calls not regulated due to lack of teams or vehicles. Results: The number of requests for clinical reasons was 53.8%, of these 51.6% were medium severity. The prevalence was male and aged between 18 and 29 years. In 84.7% of the calls, basic support was requested. The total response time was between 30 minutes and 1 hour, longer than recommended according to the national average, whether in urban or rural areas. Conclusion: After analyzing the calls, it is clear that the worst problem with the calls is the response time, and it is necessary to decrease the same of the requests.Key-words: SAMU; Indicators; Central of State Regulation; Emergency Medical Services; Health Services Administration.   Objetivo: analizar las asistencias realizadas en el Centro de Regulación de Emergencias / SAMU del Estado de Rio Grande do Sul en 2016 y 2017, centrándose en el tiempo de respuesta. Metodología: estudio observacional, descriptivo y retrospectivo con enfoque cuantitativo. Se recopilaron datos sobre el perfil del usuario, el día de la semana, la clasificación de riesgos, el tipo de queja, el tiempo promedio para responder a las solicitudes, la cantidad de retiros y la cantidad de llamadas no reguladas debido a la falta de equipos o vehículos. Resultados: El número de solicitudes por razones clínicas fue del 53.8%, de estas 51.6% fueron de gravedad media. La prevalencia fue masculina y de edades comprendidas entre 18 y 29 años. En el 84.7% de las llamadas, se solicitó soporte básico. El tiempo de respuesta total fue de entre 30 minutos y 1 hora, más de lo recomendado según el promedio nacional, ya sea en áreas urbanas o rurales. Conclusión: Después de analizar las llamadas, está claro que el peor problema con las llamadas es el tiempo de respuesta, y es necesario disminuir las mismas solicitudes.Palabras clave: SAMU; Indicadores; Central de Regulación Estatal; Servicios Médicos de Urgencia; Administración de los Servicios de Salud. 

Reflective Chiral-Homeotropic Liquid Crystal Displays

2011 ◽  
Vol 181-182 ◽  
pp. 281-284
Author(s):  
Zhi Ren ◽  
Song Tao Li ◽  
Xi Pai Liu
Keyword(s):  
Liquid Crystal ◽  
Response Time ◽  
Parameter Space ◽  
Contrast Ratio ◽  
Dynamic Parameter ◽  
Liquid Crystal Displays ◽  
Fast Response ◽  
High Contrast ◽  
Fast Response Time ◽  
Space Method

The performance of a reflective chiral-homeotropic (R-CH) liquid crystal (LC) is simulated by the dynamic parameter space method. The normally black reflective chiral-homeotropic display shows weak color dispersion, high contrast ratio, and fast response time.

Efficient Mining of Skyrank Items in Recommender Systems

2012 ◽  
Vol 472-475 ◽  
pp. 3450-3454
Author(s):  
Zhen Hua Huang ◽  
Dong Wang ◽  
Sheng Li Sun
Keyword(s):  
Response Time ◽  
Recommender Systems ◽  
Recommender System ◽  
Efficient Algorithm ◽  
Total Response ◽  
Total Response Time ◽  
Theoretical Analyses

Mining of skyrank items has recently received a lot of attention in recommender system community. Literature [3] presents an efficient algorithm ZHYX to produce the skyrank items in one single subspace. However, in multi-user environments, recommender systems generally receive multiple subspace skyrank queries simultaneously. Hence, in this paper, we propose the first efficient sound and complete algorithm, i.e. AMMSSI(Algorithm for Mining Multiple Subsapce Skyrank Items), to markedly reduce the total response time. The detailed theoretical analyses and extensive experiments demonstrate that our proposed algorithm is both efficient and effective.

P-77: FLC Materials with Fast Response Time and High Contrast Ratio for the τ-Vmin Mode FLCDs

1998 ◽  
Vol 29 (1) ◽  
pp. 778 ◽  
Author(s):  
M. Koden ◽  
T. Furukawa ◽  
M. Kabe ◽  
S. Okamoto ◽  
A. Sakaigawa ◽  
...  
Keyword(s):  
Response Time ◽  
Contrast Ratio ◽  
Fast Response ◽  
High Contrast ◽  
Fast Response Time

The high contrast ratio and fast response time of a liquid crystal display lit by a carbon nanotube field emission backlight unit

2008 ◽  
Vol 19 (23) ◽  
pp. 235306 ◽  
Author(s):  
Young Chul Choi ◽  
Ji Won Lee ◽  
Su Kyung Lee ◽  
Mun Seok Kang ◽  
Chang Soo Lee ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Carbon Nanotube ◽  
Response Time ◽  
Field Emission ◽  
Liquid Crystal Display ◽  
Contrast Ratio ◽  
Fast Response ◽  
High Contrast ◽  
Fast Response Time
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