Dissertations / Theses on the topic 'B-nodes'
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KOHLI, Gurpreet, and gkohli@student ecu edu au. "An Investigation into the Use of B-Nodes and State Models for Computer Network Technology and Education." Edith Cowan University. Computing, Health And Science: School Of, 2006. http://adt.ecu.edu.au/adt-public/adt-ECU2006.0020.html.
Full textKohli, Gurpreet. "An investigation into the use of B-Nodes and state models for computer network technology and education." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2005. https://ro.ecu.edu.au/theses/78.
Full textPretscher, Dominik. "Distribution of immune cells in head and neck cancer : CD8+ T-cells and CD20+ B-cells in metastatic lymph nodes are associated with favourable outcome in patients with oro- and hypopharyngeal carcinoma." kostenfrei, 2010. http://d-nb.info/1000329054/34.
Full textCasas, Escoda Adrià. "An Erlang Implementation of a Scalable Node B Control Unit." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-37235.
Full textAllouche, Farouk. "Role of RANKL in the differentiation of B cell associated stroma in secondary lymphoid organs." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAJ002.
Full textRANKL (receptor activator of NF-κB ligand), a member of the TNF family that signals via RANK, plays an important role for immune regulation. In the adult, RANKL is constitutively expressed by marginal reticular cells (MRCs) of the lymph nodes. Because MRCs are positioned in close vicinity to B cells and may be precursors of follicular dendritic cells (FDCs), RANKL could play a role in the differentiation of B cell-associated stroma and the humoral immune response. In order to better understand the role of RANKL expressed by the MRCs, we generated mice with conditional RANKL deficiency in the stromal compartment. We found that the B cell follicle structure was disrupted and FDC network formation was reduced. Although RANKL was not required for MRC formation, it was necessary for the expression of B cell attracting chemokine CXCL13. Among the TNFRSF members known to control CXCL13 expression and FDC formation, we found that TNFR1 was significantly reduced in the RANKL cKO mice. Thus, RANKL may present a novel therapeutic strategy against B cell-mediated immunopathologies by acting on its stroma
Pesce, John Thomas. "Early events leading to the host protective Th2 immune response to an intestinal nematode parasite /." Download the dissertation in PDF, 2005. http://www.lrc.usuhs.mil/dissertations/pdf/Pesce2005.pdf.
Full textGoldman, Lea Nichole. "Kinetics and phenotype of the draining lymph node and pulmonary B cell response to an influenza A virus-like particle vaccine." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/4634.
Full textLopes, Ana Alexandra Festas. "Estudo funcional das células T de gânglio normal/reativo e com doença linfoproliferativa crónica de células B." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/16768.
Full textAs doenças linfoproliferativas crónicas de células B são um grupo heterogéneo de entidades que representam cerca de 80-90% de todas as síndromes linfoproliferativas crónicas, nas quais podem ser observadas uma proliferação clonal de linfócitos B. Amostras de biópsia de gânglio linfático podem ser usadas para o diagnóstico destas doenças. Os gânglios linfáticos são o local adequado para as interações entre as células B e as células T e para ocorrer uma resposta imune. Neste sentido, é esperado que, na presença de células B malignas, com uma capacidade diferente para interagir com as células T, estas irão responder de uma forma diferente. O objetivo do presente trabalho consistiu na análise numérica e funcional das células T, nomeadamente de células T ativadas, células T reguladoras, Th/c17 e Thc/1, bem como, das células NK e quantificação de monócitos e células dendríticas. Foram analisadas dezanove amostras de biópsia de gânglio linfático, sete normais/reativas, cinco com linfoma linfocítico/LLC-B e sete com linfomas Não- Hodgkin B. Quantificou-se as subpopulações de células T CD4 e CD8; Th/c17; Th/c1; Tregs; células T ativadas através da citometria de fluxo, e após purificação das células TCD4 e TCD8, procedeu-se à quantificação da expressão de mRNA para os genes IL2 e IL10. Os nossos resultados mostraram um aumento das células Treg bem como, um decréscimo das células Th/c17 e Th/c1 no grupo com linfomas linfocíticos/LLC-B e no grupo com LNH-B. Relativamente à expressão génica, verificou-se uma diminuição de IL2 e um aumento de IL10 tanto para as células T CD4, como para as células T CD8 no grupo com linfomas linfocíticos/LLC-B e no grupo com LNH-B. Os resultados, embora preliminares, devido ao reduzido números de amostras estudadas, apontam para alterações significativas fenotípicas e funcionais nas células T e NK dos gânglios linfáticos com infiltração por células B patológicas, o que sugere diferenças ao nível da resposta imune anti-tumoral, que podem contribuir para o prognóstico destas entidades.
B cells Chronic lymphoproliferative diseases are a heterogeneous group of entities representing about 80-90% of all chronic lymphoproliferative syndromes, in which can be observed a clonal proliferation of B lymphocytes. Lymph node biopsy samples may be used to diagnosis of these diseases. Lymph nodes are suitable location for the interaction between B cells and T cells and an immune response to occur. Therefore, it is expected that in the presence of malignant B cells with a different capacity to interact with T cells, they will respond in a different way. The objective of this study was to numerical and functional analysis of T cells, particularly of activated T cells, regulatory T cells, Th/c17 and Th/c 1, as well as quantitation of NK cells and monocytes and dendritic cells. Nineteen lymph node biopsy samples were analyzed, seven normal/reactive, five with lymphocytic lymphoma/CLL-B and seven non- Hodgkin's lymphomas. Subpopulations of CD4 and CD8 T cells; Th/c17; Th/c1 Tregs; and T cells activated by flow cytometry were quantitated. After purification of CD4 and CD8 T cells, we proceeded to quantify the expression of mRNA for IL-2 and IL-10 genes. Our results showed an increase of Treg cells as well as a decrease in Th/ c17 cells and Th/c1 in the group with lymphocytic lymphoma/B-CLL and NHL-B group. For the gene expression, there was a decrease in IL2 and an increase of IL10 both CD4 T cells, as for CD8 T cells in the group with lymphocytic lymphomas/B-CLL and NHL-B group. The results, although preliminary, due to the small number of samples analyzed, indicate phenotypic and functional significant changes in the T and NK cells from lymph nodes with infiltration by pathological B-cells, suggesting differences in anti-tumor immune response, which may contribute to the prognosis of these entities.
Palm, Anna-Karin E. "Function and Regulation of B-cell Subsets in Experimental Autoimmune Arthritis." Doctoral thesis, Uppsala universitet, Kemisk biologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-265024.
Full textTemple, Kip. "AN INITIAL LOOK AT ADJACENT BAND INTERFERENCE BETWEEN AERONAUTICAL MOBILE TELEMETRY AND LONG-TERM EVOLUTION WIRELESS SERVICE." International Foundation for Telemetering, 2016. http://hdl.handle.net/10150/624192.
Full textMaraczek, Patrik. "Návrh a realizace systému zpracování dat z environmentálních čidel v prostředí IoT." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417775.
Full textChypre, Mélanie. "Role of receptor activator of NF-kB ligand (RANKL) in adult lymph node homeostasis and identification of inhibitors." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAJ016/document.
Full textThe TNF-family member Receptor Activator of NF-κB (RANK) is known for its role in bone homeostasis and is increasingly recognized as a central player in immune regulation. Firstly I looked for new molecular tools to target RANK/RANKL axis. I characterized and compared the biological activity of two anti-RANK antibodies. Moreover, I screened the Prestwick Chemical Library® of small molecules in order to identify inhibitors of RANK/RANKL interaction. Secondly, I studied the effect of the RANK/RANKL axis in lymph node homeostasis. RANKL is known to promote osteoclast differentiation but whether it also plays a role in the differentiation of other macrophage subsets is not known. We addressed this question by conditionally deleting RANKL from marginal reticular stromal cells (MRCs) that constitutively express RANKL in the lymph node. We observed impaired differentiation of the subcapsular sinus macrophages (SSMs). We also studied lymph node lymphatic endothelial cells (LECs) and showed that integrin alpha 2b (ITGA2b) is expressed by a lymph node subset of LECs and its expression is sensitive to RANKL
Mayol, Serra Catalina. "Dinàmica no lineal de sistemes làsers: potencials de Lyapunov i diagrames de bifurcacions." Doctoral thesis, Universitat de les Illes Balears, 2002. http://hdl.handle.net/10803/9430.
Full text1) Als làsers de classe A, la dinàmica determinista s'ha interpretat com el moviment damunt el potencial de Lyapunov. En la dinàmica estocàstica s'obté un flux sostingut per renou per a la fase del camp elèctric.
2) Per als làsers de classe A amb senyal injectat, s'ha descrit el conjunt de bifurcacions complet i s'ha determinat el conjunt d'amplituds i freqüències en el quals el làser respon
ajustant la seva freqüència a la del camp extern.
3) S'ha obtingut un potencial de Lyapunov pels làsers de classe B, només vàlid en el cas determinista, que inclou els termes de saturació de guany i d'emissió espontània.
4) S'ha realitzat un estudi del conjunt de bifurcacions parcial al voltant del règim tipus II de la singularitat Hopf--sella--node en un làser de classe B amb senyal injectat.
5) S'han identificat les respostes òptimes pels làsers de semiconductor sotmesos a modulació periòdica externa. S'han obtingut les corbes que donen la resposta màxima per cada tipus de resonància en el pla definit per l'amplitud relativa de modulació i la freqüència de modulació.
In this work we have studied the dynamics of both class A and class B lasers in terms of Lyapunov potentials. In the case of an injected signal or when some laser parameters are modulated, and more complex behaviour is expected, the bifurcation set is studied. The main results are the following:
1) For class A lasers, the deterministic dynamics has been interpreted as a movement on the potential landscape. In the stochastic dynamics we have found a noise sustained flow for the phase of the electric field.
2) For class A lasers with an injected signal, we have been able to describe the whole bifurcation set of this system and to determine the set of amplitudes frequencies for which the laser responds adjusting its frequency to that of the external field.
3) In the case of class B lasers, we have obtained a Lyapunov potential only valid in the deterministic case, including spontaneous emission and gain saturation terms. The fixed point corresponding to the laser in the on state has been interpreted as a minimum in this potential. Relaxation to this minimum is reached through damped oscillations.
4) We have performed a study of the partial bifurcation set around the type II regime of the Hopf-saddle-node singularity in a class B laser with injected signal.
5) We have identified the optimal responses of a semiconductor laser subjected to an external periodic modulation. The lines that give a maximum response for each type of resonance are obtained in the plane defined by the relative amplitude modulation and frequency modulation.
Meiring, Estelle. "The relative importance of property-specific factors that influence office occupation decisions in P-grade, A-grade and B-grade office buildings in the decentralized office nodes of Johannesburg, South Africa." Thesis, 2016. http://hdl.handle.net/10539/22350.
Full textPurpose – Within the paradigm of consumer behaviour, the purpose of this study was to determine the relative importance of the various property-specific factors that influence office occupation decisions in the decentralized office nodes of Johannesburg. The aim was to provide more definitive information on office space occupation to real estate marketers, managers, investors and owners. Design/Methodology/Approach – A Malaysian study by Adnan et al. (2012) was replicated in the South African context, utilizing their (adjusted) questionnaire survey. After review, Adnan et al.’s (2012) data analysis methods were altered and, in addition, three key-informant interviews were conducted to discuss the results of the survey and to try and gain further insight into the findings. Findings – The three categories that were considered of highest importance were Cost/Financial Considerations, Services and Management. Factors that scored the highest overall were Security & Access Control, Car Parking Provisioning & Accessibility, Electricity Systems & Provisioning and Rental Rate. The categories On-site Amenities, Space Functionality & Atmosphere and Location were considered of least importance. Research Limitations/Implications – The study was confined to property-specific factors and limited to tenants in P-grade, A-grade and B-grade office buildings in the decentralized office nodes of Johannesburg. It also took place during a specific stage of the South African economic cycle. Further research is required to determine the impact of office grade, firm type, firm size and economic climate on office occupation decisions. Originality/Value – No research on this topic exists within the South Africa context and this study contributes to the limited research, internationally, on real estate within the consumer behaviour paradigm.
MT2017
Pretscher, Dominik [Verfasser]. "Distribution of immune cells in head and neck cancer : CD8+ T-cells and CD20+ B-cells in metastatic lymph nodes are associated with favourable outcome in patients with oro- and hypopharyngeal carcinoma / vorgelegt von Dominik Pretscher." 2010. http://d-nb.info/1000329054/34.
Full textWang, Yi, and 王逸. "Study of 3rd generation Radio Acces Network Expansion in Node B." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/05173792678925118348.
Full text國立臺灣大學
電信工程學研究所
97
At the present, the income from mobile communication service makes 59.26% of the revenue of the telecom industry in Taiwan. The users are accustomed to mobile communication, and the descending rate of vocal communication is pushing the operators to develop new contents and provide mobile internet related services to satisfy the users and as a result to make a breakthrough to surmount the present revenue. However, the operators are facing the same problem:The mobile internet service takes much more system resources than the traditional vocal communication service, in terms of the amount of radio network controller (RNC) and the capacity of base stations. Therefore, how to accurately plane ahead the expansion of network capacity of the 3rd generation communication is obviously a critical issue for the operators. In the past, when planning the expansion of base station capacity, the traffic estimation was based on assumption, without considering the actual distribution of the traffic. As a result, the accuracy of the estimate capacity is usually unsatisfying. This research has taken into consideration that in most of the cases, 2G & 3G collocated at the same base station,therefore, it would estimate the capacity based on the past traffic record of 2G and 3G, and the expected growth rate of user. The traffic model, although base on the concept of packet switch service, has similar estimation rules with traditional vocal traffic. Therefore, we will make the inference based on the concept of Erlang, then, to test and verify the inference with the actual traffic expansion in the following six months. This research aims at accomplishing a more accurate planning tool for the expansion of base stations.
Hsiao, Ming-Tsung, and 蕭明宗. "A Congestion Control Strategy in Remote Multiplexing Node (RMN) of B-ISDN." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/92306581753615118425.
Full text國立交通大學
電信研究所
81
In the late few years, Broadband ISDN (B-ISDN) has been raised attention as a communication architecture which can support multimedia applications on asynchronous transfer mode (ATM) networks. This paper presents several source models such as data, voice, and video. Especially on video model, we considered scene change condition. Then, we applied those model to ATM network for congestion control. We use two level threshold on buffer queue length to selective discard some less significant packets. A mathematical model of this system is analysed and queue length distributions are derived. It is shown that the control procedures can achieve significant performance improve- ment over uncontrolled system. In chapter 2, we propose a two-threshold reactive congestion control strategy with partial reject. The two-threshold conges- tion control strategy will be active when the queue length exceeds a higher threshold and will continue until the queue length drops to a lower threshold for each type of traffic. When the batch size of a new coming arrival exceeding the remaining free buffers of its queue, the system will accept packets until there is no free buffer, and these exceeding packets are re- jected and lost. The major purpose is to get high throughput. In chapter 3, the strategy used in here is similar to chapter 2, but replace ``partial reject" to ``complete reject". When the batch size of a new coming arrival exceeding the remaining free buffer of its queue, the whole batch packets will be complete reject. The purpose is to keep message integrality.
Cillanueva, Lucas García. "3D Video Transmission over LTE." Master's thesis, 2014. http://hdl.handle.net/10316/99192.
Full textThis thesis presents a research work on quality of experience in 3D video transmission over LTE networks. The objective is to study the state-of-art of LTE and 3D video, described in the scientific literature, and to quantify the user quality of experience (QoE) during a simulated LTE transmission. The work will start by a study of the University of Wien “LTE-A System Simulator” and its capabilities. In addition, different scenarios with various users equipment (UEs) and base stations (eNodeBs) densities will be configured and simulated in order to obtain the frame-by-frame Block Error Rate (BLER) values experienced by different UEs. Once obtained, the Block Error Rate frames will be converted to packet level error traces, which will be used to introduce erasures and corruptions into the packetized 3D video bitstream. The corrupted encoded video stream will be decoded using an error-concealment capable video decoder and the decoded/recovered video quality (QoE) will be estimated based on the Structural Similarity Index of the recovered video. Finally, the QoE results for the different system configurations will allow classifying the severity of the QoE degradations due to transmission losses, through inferring the relationship between those system parameters and the achievable QoE.
Esta dissertação apresenta um trabalho de investigação sobre a qualidade de experiência numa transmissão de vídeo 3D sobre redes LTE. O objectivo é estudar o estado-da-arte no que respeita a rede LTE e vídeo 3D, descrito na literatura científica, e obter a qualidade de experiência de usuário (QoE) durante uma simulação de transmissão LTE. O trabalho começará por um estudo do University of Wien “LTE-A System Simulator” e as suas capacidades. Para este efeito, vão ser configurados diferentes cenários com distintas densidades de utilizadores (UEs) e estações base (eNodeBs), com o fim de obter a taxa de erros do bloco (BLER) experimentada por diferentes utilizadores. Depois de obter esta taxa, as tramas da taxa de erros do bloco (BLER) serão convertidas em tramas de nível de erro de pacotes, que vão ser usadas para adicionar corrupções de bit em ficheiros de vídeo 3D. O fluxo de vídeo codificado e corrompido será descodificado usando um descodificador de vídeo e a qualidade do vídeo recuperado vai ser calculada com base no Índice de Similitude Estrutural. Finalmente, os resultados de QoE para as diferentes configurações do sistema permitirão classificar o nível das degradações de QoE devido a perdas de transmissão, por meio de inferir a relação entre os parâmetros do sistema e a QoE obtida.