1,853 research outputs found
Cha guan. [3 & 4]
No full text1. 茶館 : side 3 -- 2. 茶館 : side 4.Section number supplied by cataloguer.Possibly reproduced from other commercial recording or radio broadcast (Pending for review)Electronic reproduction from Rulan Chao Pian Audio Cassette Collection.Spoken in Chinese.1. Cha guan : side 3 -- 2. Cha guan : side 4
Cha guan. [1 & 2]
No full text1. 茶館 : side 1 -- 2. 茶館 : side 2.Section number supplied by cataloguer.Possibly reproduced from other commercial recording or radio broadcast (Pending for review)Electronic reproduction from Rulan Chao Pian Audio Cassette Collection.Spoken in Chinese.1. Cha guan : side 1 -- 2. Cha guan : side 2
Cognitive Load Estimation with Behavioral Cues in Human-Machine Interaction
No full textDetecting human cognitive load is an increasingly important issue in the interaction between humans and machines, computers, and robots. In the past decade, several studies have sought to distinguish the cognitive load, or workload, state of humans based on multiple observations, such as behavioral, physiological, or multi-modal data. In the Human-Machine Interaction (HMI) cases, estimating human workload is essential because manipulators’ performance could be adversely affected when they have many tasks that may be demanding. If the workload level can be detected, it will be beneficial to reallocate tasks on manipulators to improve the productivity of HMI tasks. However, it is still on question marks what kinds of cues can be utilized to know the degree of workload. In this research, eye blinking and mouse tracking are chosen as behavioral cues, exploring the possibility of a non-intrusive and automated workload estimator. During tests, behavior cues are statistically analyzed to find the difference among levels, using a dataset focused on three levels of the dual n-back memory game. The statistically analyzed signal is trained in a deep neural network model to classify the workload level. In this study, eye blinking related data and mouse tracking data have been statistically analyzed. The one-way repeated measure analysis of variance test result showed eye blinking duration on the dual 1-back and 3-back are significantly different. The mouse tracking data could not pass the statistical test. A three-dimension convolutional deep neural network is used to train visual data of human behavior. Classifying the dual 1-back and 3-back data accuracy is 51% with 0.66 F1-score on 1-back and 0.14 on 3-back data. In conclusion, blinking and mouse tracking are unlikely helpful cues when estimating different levels of workload
Delay in Seeking Care Among Tuberculosis Patients Attending Tuberculosis Clinics in Rungwe District, Tanzania.
No full textTuberculosis is one of the major public health problems in Tanzania. The main control strategy in the country is passive case finding whereby people with symptoms are expected to go to health facilities for further investigation. Still there is delay in seeking care in the population. Delay in case detection and treatment may worsen the prognosis of the disease and spread of infection. It is therefore important to determine factors responsible for delay in seeking care in order to develop strategies to address them. The main objective of this study was to asses social and cultural factors that contribute to delay in seeking care among tuberculosis patients attending DOTS clinics in Rungwe District Materials and methods: The study was a cross sectional analytical in nature conducted in Rungwe district involved 232 TB patients .Exit interview were used to collect data and data were analyzed computer software, Statistical Package for Social Science (SPSS) version 15. Convenience sampling was used to select study participants. Results were presented in frequencies, percentages and Chi-square test was applied to show the association between dependent and independent variables. Ethical issues were observed. The study revealed majority of the patients (71%) delayed to seek care. Older (above 44 years) patients were at a significant elevated risk (OR = 3.8; 95% CI = 1.7, 8.5), to delay in seeking for health care. Similarly, although not significant, females were twice as likely as males to delay to seek for health care (OR = 2.1; 95% CI = 0.9, 4.5). Social and traditional practices had significant contribution to delay in seeking medical care. Factors associated with delay in seeking health care for more than 30 days after development of symptoms included age, gender, place of first resort and perceived severity of the disease. Community should be sensitized on seeking appropriate health care, sensitization programs should take into consideration different groups in a society such as women, elders, illiterate and poor by using culturally convenient media of communication to ensure that the whole community is reached.\u
GO-modified flexible polymer nanocomposites fabricated via 3D stereolithography
No full textGraphene oxide (GO) induced enhancement of elastomer properties showed a great deal of potential in recent years, but it is still limited by the barrier of the complicated synthesis processes. Stereolithography (SLA), used in fabrication of thermosets and very recently in “flexible” polymers with elastomeric properties, presents itself as simple and user-friendly method for integration of GO into elastomers. In this work, it was first time demonstrated that GO loadings can be incorporated into commercial flexible photopolymer resins to successfully fabricate GO/elastomer nanocomposites via readily accessible, consumer-oriented SLA printer. The material properties of the resulting polymer was characterized and tested. The mechanical strength, stiffness, and the elongation of the resulting polymer decreased with the addition of GO. The thermal properties were also adversely affected upon the increase in the GO content based on differential scanning calorimetry and thermogravimetric analysis results. It was proposed that the GO agglomerates within the 3D printed composites, can result in significant change in both mechanical and thermal properties of the resulting nanocomposites. This study demonstrated the possibility for the development of the GO/elastomer nanocomposites after the optimization of the GO/“flexible” photoreactive resin formulation for SLA with suitable annealing process of the composite in future
GO-modified flexible polymer nanocomposites fabricated via 3D stereolithography
No full textGraphene oxide (GO) induced enhancement of elastomer properties showed a great deal of potential in recent years, but it is still limited by the barrier of the complicated synthesis processes. Stereolithography (SLA), used in fabrication of thermosets and very recently in “flexible” polymers with elastomeric properties, presents itself as simple and user-friendly method for integration of GO into elastomers. In this work, it was first time demonstrated that GO loadings can be incorporated into commercial flexible photopolymer resins to successfully fabricate GO/elastomer nanocomposites via readily accessible, consumer-oriented SLA printer. The material properties of the resulting polymer was characterized and tested. The mechanical strength, stiffness, and the elongation of the resulting polymer decreased with the addition of GO. The thermal properties were also adversely affected upon the increase in the GO content based on differential scanning calorimetry and thermogravimetric analysis results. It was proposed that the GO agglomerates within the 3D printed composites, can result in significant change in both mechanical and thermal properties of the resulting nanocomposites. This study demonstrated the possibility for the development of the GO/elastomer nanocomposites after the optimization of the GO/“flexible” photoreactive resin formulation for SLA with suitable annealing process of the composite in future
Voices, values, and the urban village: An imagined roundtable for Cha Kwo Ling
No full textIn 2022, the Outline Zoning Plan S/K15/27 was approved by the Hong Kong Government, confirming the demolition of Cha Kwo Ling Village (hereinafter: CKL Village) for high-density residential development. The fate of CKL Village and the responses it instigated raises how various stakeholders value the same space differently, but lack a sufficiently comprehensive framework and inclusive, common platform to express and negotiate them. Consequently, the unarticulated heritage assets often become subordinate to urban development.Thus, this thesis analyses four perspectives - namely the Government, the Developer, the Villager, and the Hong Konger - to understand their respective valuations of CKL Village, and whether there are potentials amidst their similarities and differences. In academia, these perspectives have previously been addressed in relation to Hong Kong's heritage; but since the Anti-Extradition Law Movement (2019), there is a need to renew the understanding of these societal stakeholders and their motivations. Thus, this thesis serves as a theoretical rehearsal of gathering and aligning different voices, utilising UNESCO's values and attributes framework, and resonating with the first two steps of the Historic Urban Landscape concept.In doing so, the thesis presents two key critiques against the Hong Kong Government's current heritage mechanism. Firstly, the underlying monument-based approach that fails to address heritage assets in the form of groups and landscapes. Secondly, the reluctance to engage with the existing communities who currently occupy the heritage. Finally, as the thesis framework has revealed specific and different interests for each perspective, it calls for an active negotiation between them, beyond the scope of thesis writing.AR2A011Architectural History ThesisArchitecture, Urbanism and Building Science
Goethe’s World Literature, Universal Particularism, and European Imperialism
No full textIn his article Goethe\u27s World Literature, Universal Particularism, and European Imperialism Dongho Cha tracks the ideology in Goethe\u27s concept of world literature. Early comparatists claim to stand for the universalism of this concept by understanding it to totalize all literatures across linguistic, territorial, and national boundaries and intended to go beyond European nationalism. Cha argues that Goethe\u27s idea of world literature is not a universal category that includes all of the world nliteratures, but a limited category that includes European literatures only and posits that world literature\u27s and comparative literature\u27s universalism is related to nineteenth-century European imperialism. Contrary to the paradigm of world literatures as practiced in comparative literature, Cha argues that the building and the politics and practice of world literature understood as world literatures must be characterized by boundlessness and limitlessness in order to achieve an understanding and practice of the universal and planetary
COMPLEXITIES OF 3-MANIFOLDS FROM TRIANGULATIONS, HEEGAARD SPLITTINGS AND SURGERY PRESENTATIONS
No full textWe study complexities of 3-manifolds defined from triangulations, Heegaard splittings, and surgery presentations. We show that these complexities are related by linear inequalities, by presenting explicit geometric constructions. We also show that our linear inequalities are asymptotically optimal. Our results are used in another paper of the author to estimate Cheeger-Gromov L-2 rho-invariants in terms of geometric group theoretic and knot theoretic data.110sciescopu
Lean NOx Capture and Reduction by NH3 via NO+ Intermediates over H-CHA at Room Temperature
No full textThe oxidation of NO to NO2 and the subsequent reduction by NH3 via a NO+ intermediate over a proton-type chabazite zeolite (H-CHA) were investigated by the combination of in situ infrared (IR) spectroscopy and density functional theory (DFT) calculations. The in situ IR spectral results indicate that the NO' species formed under a flow of NO + O-2 at 27-250 degrees C are more stable at lower temperatures over both H-CHA and copper-cation-exchanged CHA zeolite (Cu-CHA). The Arrhenius plot (T = 27-120 degrees C) shows a negative apparent activation barrier energy (-11.5 kJ mol(-1)) for the formation of NO+ species under the NO + O(2 )flow over H-CHA. The time course of the IR spectra at 27 degrees C shows that NO is oxidized by O-2 to NO2 and then further converted via N2O4 to NO+ and NO3. The subsequent exposure to NH3 at 27 degrees C reduces the NO species to N-2. DFT calculations revealed that Bronsted acid sites in zeolite pores promote the dissociation of N2O4 intermediates into NO and NO3- species with a low activation barrier (15 kJ mol(-1)). Moreover, the computed activation barrier for the reduction of NO+ species by NH3 was considerably low (6 kJ mol(-1)). The experimental and theoretical results of this study demonstrate the high potential of Cu-free H-CHA zeolites for promoting lean NOx capture to form NO+ species and the subsequent reduction by NH3 at room temperature
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