710 research outputs found
Isotope effect suggests site‐specific nonadiabaticity on Ge(111)c(2×8)
No full textOpen-Access-Publikationsfonds 202
Mechanistic Insights into Nonadiabatic Interband Transitions on a Semiconductor Surface Induced by Hydrogen Atom Collisions
No full textTo understand the recently observed enigmatic nonadiabatic energy transfer for hyperthermal H atom scattering from a semiconductor surface, Ge(111)c(2 × 8), we present a mixed quantum-classical nonadiabatic molecular dynamics model based on the time-dependent evolution of Kohn–Sham orbitals and a classical path approximation. Our results suggest that facile nonadiabatic electronic transitions from the valence band to the conduction band occur selectively at the rest atom site, where surface states are doubly occupied, but not at the adatom site, where empty surface states are localized. This drastic site specificity can be attributed to the changes of the local band structure upon energetic H collisions at different surface sites, leading to transient near degeneracies and significant couplings between occupied and unoccupied orbitals at the rest atom but not at the adatom. These insights shed valuable light on the collision-induced nonadiabatic dynamics at semiconductor surfaces
Modeling contaminant spread and mitigation in the indoor environment
No full textExperimental and modeling efforts, using a pilot-scale testbed and multizone modeling, are undertaken to develop filtration and ventilation strategies aimed at improving indoor air quality (IAQ). As part of this effort, a model is developed to effectively estimate crack areas of the multizone testbed. The model is divided into two sub-approaches: one approach is to assume the same crack area for the same type of opening and determine them by minimizing the sum of the squares of relative error between the calculated and experimental ventilation rates for the whole facility; the other is to assume that the crack areas are independent of each other and a similar least-squares minimization is applied to determine these crack areas zone by zone. A comparison of the two approaches shows that both can provide satisfactory results, and the latter approach is preferred, because it provides more flexibility and detail.
Ventilation systems are explored using multizone simulations. The model results suggest a distributed unbalanced ventilation system is preferred for maintaining IAQ, because 1) it can provide positive pressure difference across the building envelope to prevent exterior contaminant infiltration; and 2) some contaminated indoor zones can be “isolated” from adjacent ones by adjusting the relative pressure differences. Realistic particle distributions typical to a particular contamination threat of interest are considered, and an acoustically enhanced impaction (AEI) filtration device is investigated together with other filters. The protection factor (PF, a ratio of concentration integrated over time in the ambient to that indoors) is chosen as a performance metric. A PF-oriented evaluation framework has been established such that ventilation system/strategy (or filter) comparison in terms of IAQ enhancement is straightforward. For instance, 16 filtration schemes are compared to identify preferred ventilation and filtration strategies. For the indoor environment, a highly efficient outside air (OA) filter is recommended, but a recirculated air (RA) filter is relatively much less effective. For vestibule protection, a stand-alone balanced system with 100% RA filtration is recommended. The AEI device can be an alternative to a HEPA filter when the ambient contamination level is low to moderate.
Extension of an existing analytical steady-state PF model is undertaken to demonstrate the advantages of pressurization protection of buildings over non-pressurization protection. The analytical PF model can be used to determine the ventilation flow rate and filter efficiency at a specific PF level and guide the vestibule door operation. It is found that the minimum closing period of the vestibule interior door typically should be 20 minutes to protect the room.Item withdrawn by Laura Spradlin ([email protected]) on 2014-01-02T14:53:49Z
Item was in collections:
University of Illinois Theses & Dissertations (ID: 1)
No. of bitstreams: 2
Meng_Lingjun.docx: 13614092 bytes, checksum: 9c23a4f960daff930a4199ec1a110a03 (MD5)
Meng_Lingjun.pdf: 3047441 bytes, checksum: 1d3e3ab72a8e1d97668bfd0eb792aa81 (MD5)Made available in DSpace on 2014-05-30T16:52:41Z (GMT). No. of bitstreams: 2
Lingjun_Meng.pdf: 3048684 bytes, checksum: 12c0be3cf8dc25d14067b377041ad892 (MD5)
license.txt: 4059 bytes, checksum: ddb4ed60e47f74abfcce53b5b8f9989f (MD5
Uneasiness in family education in China : clinical approach of psychoanalytical orientation
No full textCette thèse s’inscrit dans l’approche clinique d’orientation psychanalytique en sciences de l’éducation. Elle porte sur l’éducation familiale en Chine. Elle est consacrée, plus particulièrement, aux éléments psychiques inconscients dans les processus éducatifs au sein de la famille et dans les rapports familiaux, au rapport entre l’enfance des parents et l’éducation familiale qu’ils donnent à l’égard de leurs enfants et à la manière dont les parents vivent la relation parents-enfants. L’entretien clinique à visée de recherche est choisi comme la méthode pour accueillir des données dans cette recherche. Cinq entretiens ont été retenus auprès des parents chinois à partir de la consigne suivante : «Tu étais autrefois enfant, aujourd’hui toi-même mère, maman (père, papa). Je voudrais savoir concernant l’éducation de votre enfant, comment fais-tu ? Parle-moi librement de tout ce qu’il te vient à l’esprit ». La thèse comporte trois parties : la première partie est consacrée à l’implication du chercheur. La deuxième partie concerne les références théoriques, – quelques aspects de la philosophie chinoise et des éléments autour de l’éducation familiale et la psychanalyse. La troisième partie est consacrée aux aspects méthodologiques, à l’analyse des entretiens cliniques et à la mise en lien des résultats et la perspective.This thesis is part of the clinical approach of psychoanalytical orientation in the sciences of education. It focuses on family education in China. It is devoted, more particularly, to the unconscious psychical elements in the educational processes and in the family relationships, to the correlation between the childhood of parents and the family education they give to their children, to the way parents live the parents-child relationship. The clinical interview aimed at research is chosen as the method to collect data in this research. Five interviews were held with Chinese parents from the following instructions: ‘You were once a child, today yourself mother, mom (father, dad). I would like to know about your child's education, how are you doing? Talk to me freely about everything that comes to your mind.’ The thesis is divided into three parts: the first part is devoted to the involvement of the researcher. The second part includes theoretical references, – some aspects of Chinese philosophy and some elements around family education and psychoanalysis. The third part is devoted to the methodology, the analysis of clinical interviews and the connection between results of analysis and the perspective
Malaise dans l'éducation familiale en Chine Approche clinique d'orientation psychanalytique
No full textThis thesis is part of the clinical approach of psychoanalytical orientation in the sciences of education. It focuses on family education in China. It is devoted, more particularly, to the unconscious psychical elements in the educational processes and in the family relationships, to the correlation between the childhood of parents and the family education they give to their children, to the way parents live the parents-child relationship. The clinical interview aimed at research is chosen as the method to collect data in this research. Five interviews were held with Chinese parents from the following instructions: ‘You were once a child, today yourself mother, mom (father, dad). I would like to know about your child's education, how are you doing? Talk to me freely about everything that comes to your mind.’ The thesis is divided into three parts: the first part is devoted to the involvement of the researcher. The second part includes theoretical references, – some aspects of Chinese philosophy and some elements around family education and psychoanalysis. The third part is devoted to the methodology, the analysis of clinical interviews and the connection between results of analysis and the perspective.Cette thèse s’inscrit dans l’approche clinique d’orientation psychanalytique en sciences de l’éducation. Elle porte sur l’éducation familiale en Chine. Elle est consacrée, plus particulièrement, aux éléments psychiques inconscients dans les processus éducatifs au sein de la famille et dans les rapports familiaux, au rapport entre l’enfance des parents et l’éducation familiale qu’ils donnent à l’égard de leurs enfants et à la manière dont les parents vivent la relation parents-enfants. L’entretien clinique à visée de recherche est choisi comme la méthode pour accueillir des données dans cette recherche. Cinq entretiens ont été retenus auprès des parents chinois à partir de la consigne suivante : «Tu étais autrefois enfant, aujourd’hui toi-même mère, maman (père, papa). Je voudrais savoir concernant l’éducation de votre enfant, comment fais-tu ? Parle-moi librement de tout ce qu’il te vient à l’esprit ». La thèse comporte trois parties : la première partie est consacrée à l’implication du chercheur. La deuxième partie concerne les références théoriques, – quelques aspects de la philosophie chinoise et des éléments autour de l’éducation familiale et la psychanalyse. La troisième partie est consacrée aux aspects méthodologiques, à l’analyse des entretiens cliniques et à la mise en lien des résultats et la perspective
Malaise dans l'éducation familiale en Chine Approche clinique d'orientation psychanalytique
No full textThis thesis is part of the clinical approach of psychoanalytical orientation in the sciences of education. It focuses on family education in China. It is devoted, more particularly, to the unconscious psychical elements in the educational processes and in the family relationships, to the correlation between the childhood of parents and the family education they give to their children, to the way parents live the parents-child relationship. The clinical interview aimed at research is chosen as the method to collect data in this research. Five interviews were held with Chinese parents from the following instructions: ‘You were once a child, today yourself mother, mom (father, dad). I would like to know about your child's education, how are you doing? Talk to me freely about everything that comes to your mind.’ The thesis is divided into three parts: the first part is devoted to the involvement of the researcher. The second part includes theoretical references, – some aspects of Chinese philosophy and some elements around family education and psychoanalysis. The third part is devoted to the methodology, the analysis of clinical interviews and the connection between results of analysis and the perspective.Cette thèse s’inscrit dans l’approche clinique d’orientation psychanalytique en sciences de l’éducation. Elle porte sur l’éducation familiale en Chine. Elle est consacrée, plus particulièrement, aux éléments psychiques inconscients dans les processus éducatifs au sein de la famille et dans les rapports familiaux, au rapport entre l’enfance des parents et l’éducation familiale qu’ils donnent à l’égard de leurs enfants et à la manière dont les parents vivent la relation parents-enfants. L’entretien clinique à visée de recherche est choisi comme la méthode pour accueillir des données dans cette recherche. Cinq entretiens ont été retenus auprès des parents chinois à partir de la consigne suivante : «Tu étais autrefois enfant, aujourd’hui toi-même mère, maman (père, papa). Je voudrais savoir concernant l’éducation de votre enfant, comment fais-tu ? Parle-moi librement de tout ce qu’il te vient à l’esprit ». La thèse comporte trois parties : la première partie est consacrée à l’implication du chercheur. La deuxième partie concerne les références théoriques, – quelques aspects de la philosophie chinoise et des éléments autour de l’éducation familiale et la psychanalyse. La troisième partie est consacrée aux aspects méthodologiques, à l’analyse des entretiens cliniques et à la mise en lien des résultats et la perspective
Teaching Communicative Competence to Adult Learners: An Intensive Foreign Language Program in China
No full textThe main purpose of this paper is to explore some feasible ways in which communicative competence can be taught at the Beijing Second Foreign Language Institute in Beijing, China. In the first part of the paper, a portrait of the institute\u27s intensive language program, including its philosophy, a brief history and a description of the students, is provided so that the readers will have some idea why the paper is focused on communicative competence. Language is then described as a communication process involving linguistic, interactional and variational competence. The main part of this paper focuses on some innovative techniques by which communicative competence can be taught. A set of roleplays that includes situations which Chinese scholars may encounter when studying in the U.S.is presented. Finally, three possible ways to assess students\u27 communicative competence are discussed
Plasminogen Activator Inhibitor-1 4G/5G (rs1799889) Polymorphism in Chinese Patients with Diabetes Mellitus and Hypertension
No full textZiran Wang,1 Jintu Chen,2 Jingjing Song,3 Lingjun Kong,1 Xuanzhi Wang,4 Tengda Xu,5 Songbai Lin,5 Yaling Dou1 1Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, People’s Republic of China; 2Department of Clinical Laboratory, Quanzhou First Hospital Affiliated to Fujian Medical University, Quanzhou, Fujian, People’s Republic of China; 3Department of Clinical Laboratory, Anhui Provincial Maternal and Child Health Hospital, Hefei, Anhui, People’s Republic of China; 4Department of Medical Laboratory, North Sichuan Medical College, Nanchong, Sichuan, People’s Republic of China; 5Department of Health Management, Peking Union Medical College Hospital, Beijing, People’s Republic of ChinaCorrespondence: Yaling Dou, Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, 100730, People’s Republic of China, Email [email protected]: To determine the plasminogen activator inhibitor-1 (PAI-1) 4G/5G (rs1799889) genotype of the subjects in a robust detection method and to explore the association of the PAI-1 4G/5G polymorphism with susceptibility to diabetes mellitus (DM) and hypertension (HTN) as well as clinical characteristics.Methods: This study recruited 208 patients (68 patients were diagnosed with DM, 70 patients with HTN and 70 patients with DM combined with HTN) and 132 healthy controls (HC). A subset of the population was selected to evaluate the accuracy of the Real-time PCR (RT-PCR) method for detecting PAI-1 4G/5G polymorphism by using the sequencing method as the gold standard. Furthermore, the association of the PAI-1 4G/5G polymorphism with genetic susceptibility to DM and HTN was explored. Moreover, variations in clinical characteristics among individuals with various PAI-1 genotypes were also analyzed in the DM group, the HTN group and the DM+HTN group.Results: There was a high concordance between the RT-PCR method and the sequencing method in determining the PAI-1 4G/5G polymorphism. No association was observed between the PAI-1 4G/5G polymorphism and susceptibility to DM, HTN and DM+HTN, respectively. There were no statistical differences in all study indicators among individuals that carrying various genotypes in the HC group. There were several variations in clinical characteristics among individuals harboring different PAI-1 4G/5G genotypes in the DM group, the HTN group and the DM+HTN group.Conclusion: The RT-PCR method can accurately identify the PAI-1 4G/5G genotype in different individuals. The PAI-1 4G/5G polymorphism may not be associated with genetic susceptibility to DM, HTN and DM+HTN, but differences in clinical characteristics among individuals with various genotypes may provide a reference for disease assessment and personalized treatment of patients.Keywords: diabetes mellitus, hypertension, plasminogen activator inhibitor-1, gene polymorphis
Research on Niche Improvement Path of Photovoltaic Agriculture in China
No full textTo explore the niche improvement path of photovoltaic agriculture in China, a niche influencing factor system was constructed first. Then, this study innovatively combined the DEMATEL and analytic network process (DANP) method and the NK model, which can correct the defects of the traditional NK model. Based on the above method, the influence coefficients and index weight of each niche factor were calculated, and the niche fitness landscape of photovoltaic agriculture was constructed. Finally, according to the fitness landscape map of each combination state, the optimal configuration state of niche influencing factors of photovoltaic agriculture and the optimal niche improvement path of photovoltaic agriculture were explored. We found that the interaction between the six niche influencing factors determines the niche fitness of photovoltaic agriculture, and the changes in the niche fitness and the niche improvement of photovoltaic agriculture are coordinated. It was proposed that the optimal niche improvement path of photovoltaic agriculture in China is “technological innovation → policy formulation → resource allocation → economic improvement → social recognition → environmental protection”, and the research conclusions were further explained and discussed
Economic and Social Benefits of Aquavoltaics: A Case Study from Jiangsu, China
No full textAquavoltaics is an innovative and beneficial solution that makes dual use of water area for photovoltaic (PV) power generation and aquaculture. Currently, China has made remarkable developments in aquavoltaics. This paper first analyzes the current development status of aquavoltaics in China, then takes the TW “fishery–PV integration” base project in Nanjing, Jiangsu Province, as a case study to analyze its economic and social benefits, and finally puts forward countermeasure suggestions for the development of aquavoltaics in China. It is found that Jiangsu Province is one of the clustering areas for the development of aquavoltaics in China, and the development of aquavoltaics in this province has a high level of specialization. The payback period (PP) of the TW “fishery–PV integration” base project is 10.44 years, the net present value (NPV) is USD 18.5334 million (the discount rate is 5%), and the internal rate of return (IRR) is 8.06%. The social benefits of this project are mainly reflected in the promotion of energy conservation and emission reduction, the alleviation of energy shortages, the optimization of land use, and the development of culture, tourism, science, and education. The development of aquavoltaics should be promoted by strengthening scientific research, paying attention to the impact of PV panel erection on the ecological environment of the waters, emphasizing the fishery farming part of the aquavoltaic project, and improving the commercial operation mode of the aquavoltaic project
- …
