<p> One of the important objectives of a Radar Warning Receiver (RWR) aboard a tactical aircraft is to evaluate the level of threat posed by hostile radars in an extremely complex Electronic Warfare (EW) environment in reliable, robust and timely manner. For the RWR objective to be achieved, it passively collects electromagnetic signals emitted from potentially hostile radars. One class of such radar systems is the Multi-Function Radar (MFR) which presents a serious threat from the stand point of a RWR. MFRs perform multiple functions simultaneously employing complex hierarchical signal architecture. The purpose of this paper is to uncover the evolution of the operational mode (radar function) from the view point of a target carrying the RWR when provided with noisy observations and some prior knowledge about how the observed radar functions. The RWR estimates the radar's threat which is directly dependant on its current mode of operation. This paper presents a grid filter approach to estimate operational mode probabilities accurately with the aid of pre-trained Observable Operator Models (OOMs) and Hidden Markov Models (HMMs). Subsequently, the current mode of operation of a radar is estimated in the maximum a posteriori (MAP) sense. Practicality of this novel approach is tested for an EW scenario in this paper by means of a hypothetical MFR example. Finally, we conclude that the OOM-based grid filter tracks the mode of operation of a MFR more accurately than the corresponding HMM-based grid filter. </p> / Thesis / Master of Applied Science (MASc)

<h1><h1>Abstrakt</h1><p> </p><p>Övervikt och fetma är idag ett världsomfattande hälsoproblem och fetma medför en klart ökad risk för att drabbas av olika sjukdomar, såsom hjärtkärlsjukdomar. I Gävleborg är andelen överviktiga och feta större än medelvärdet i riket. Syftet med studien, efter valda begränsningar, var att beskriva hälsosamordnarna arbets- och förhållningssätt gällande övervikt och fetma med avseende den vuxna befolkningen inom primärvården Gästrikland. Resultatet visade att gemensamma riktlinjer fanns för deras arbete och att dessa till största delen efterlevdes även om förhållningssättet till dem skiljde sig åt. Samarbetet med andra yrkeskategorier inom primärvården fungerade bra, dock har omstruktureringar i arbetssätt medfört att vissa brister fanns. Uppfattningen att hälsosamordnarnas utbildningsbakgrund påverkade deras arbetssätt gentemot patienterna kan skönjas. Samtliga lade stor vikt vid patientens eget ansvar gällande livsstil och levnadsvanor. En av de påverkansmetoder som användes var det <em>motiverande samtalet. </em>Flertalet hälsosamordnare använde sig av denna metod, men förhållningssättet till den skiljde sig åt. Hälsocentralerna där hälsosamordnarna verkade skiljde sig åt bland annat gällande storlek på upptagningsområde, social, ekonomisk och kulturell bakgrund hos patienterna. Detta medförde att de ibland arbetade på olika sätt och hade olika förhållningssätt till själva arbetet och de människor de mötte.</p></h1>

Submitted by Aelson Maciera (aelsoncm@terra.com.br) on 2017-08-01T18:55:28Z No. of bitstreams: 1 DissABLF.pdf: 854920 bytes, checksum: 29219ca5ce87de11f89e1e54bb40f66b (MD5) / Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2017-08-08T14:01:58Z (GMT) No. of bitstreams: 1 DissABLF.pdf: 854920 bytes, checksum: 29219ca5ce87de11f89e1e54bb40f66b (MD5) / Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2017-08-08T14:02:05Z (GMT) No. of bitstreams: 1 DissABLF.pdf: 854920 bytes, checksum: 29219ca5ce87de11f89e1e54bb40f66b (MD5) / Made available in DSpace on 2017-08-08T14:07:32Z (GMT). No. of bitstreams: 1 DissABLF.pdf: 854920 bytes, checksum: 29219ca5ce87de11f89e1e54bb40f66b (MD5) Previous issue date: 2017-04-10 / Não recebi financiamento / When it comes to internalization of companies, there are several factors that drive companies to venture into new markets, such as the increasement of the competition and the facilities of trade and production in other countries. However it is indispensable that the company knows the market in which it will operate. And one of the ways is to establish new relationships with agents in the new country, and so acquire new knowledge that will contribute to the evolution of the internationalization’s process of the company in the new country. This research refers, then to the understanding of how occurs the generation and dissemination of knowledge that is acquired from the relationship inter and intra-organizational level which changes the operation’s mode of the multinational company by the time, within its internationalization process. Through the behavioral theories such as the model of Uppsala, the literature of subsidiaries’ development and relational model, it was possible to analyze the relationships that were articulate by the company and analyze the knowledge for it acquired and disseminated. To conduct the research, a unique case study of qualitative nature was developed, under a longitudinal perspective, which involved a Brazilian subsidiary called Chery Brazil Manufacture Importation and Distribution Ltda., which the head office is a Chinese origin. This present research showed that it is evident that in its internationalization path, the relationships inter and intra-organizational were fundamental to Cherry Brazil, regarding the generation and dissemination of different type of knowledge and these were decisive for the modification of its mode of operation, which secured their stay in the country. / Em se tratando de internacionalização de empresas, são diversos os fatores que impulsionam as empresas a se aventurarem em novos mercados, como o aumento da concorrência e as facilidades comerciais e de produção em outros países. Porém é imprescindível que a empresa conheça o mercado em que irá operar. Uma das maneiras é estabelecer novos relacionamentos com agentes no novo país e assim adquirir novos conhecimentos que contribuam para a evolução do processo de internacionalização da empresa no novo país. Esta pesquisa refere-se, então, ao entendimento de como ocorre a geração e a difusão do conhecimento que é adquirido a partir dos relacionamentos inter e intraorganizacional que modificam o modo de operação da empresa multinacional ao longo do tempo, dentro de seu processo de internacionalização. Através das teorias comportamentais como o modelo de Uppsala, a literatura de desenvolvimento de subsidiárias e o modelo relacional, foi possível analisar os relacionamentos que foram articulados pela empresa e analisar os conhecimentos por ela adquiridos e difundidos. Para que esta pesquisa fosse realizada, foi desenvolvido um estudo de caso único, de natureza qualitativa, sob uma perspectiva longitudinal, que envolveu uma subsidiária brasileira denominada Chery Brasil Fabricação Importação e Distribuição de Veículos Ltda., cuja sua matriz é de origem chinesa. A presente pesquisa deixou evidente que em sua trajetória de internacionalização, os relacionamentos inter e intraorganizacionais foram fundamentais para a Chery Brasil, quanto à geração e a difusão dos diferentes tipos de conhecimentos, e que estes foram determinantes para as modificações de seu modo de operação, o que garantiu sua permanência no país.

Using mixed-culture fermentation, the carboxylate platform produces carboxylic acids, which are chemically converted into chemicals and fuels. To optimize the mixed-acid fermentation, different bioreactor configurations and operating modes were investigated. Intermittent air exposure did not affect fermentation performance and bacterial profiles, but reduced the high-molecular-weight carboxylic acids. The microbial flora contained strict and facultative microbes, suggesting the presence of a facultative anaerobic community existing in a biofilm. Compared to countercurrent trains, propagated fixed-bed fermentations have similar selectivity and acid distribution, but lower yield, conversion, productivity, and acid concentration. One- to six-stage countercurrent fermentations were operated with similar conditions. Fewer stages increased conversion, whereas more stages increased acid concentration and selectivity. One to four stages achieved similar yield, and four to six stages achieved similar maximum acid concentration. Maximum conversion was achieved with a single stage. Recycling residual biomass retained microorganisms and nutrients and increased yield and productivity. Relative to lower biomass reflux, higher reflux increased conversion, decreased selectivity, and did not affect yield. The recommended carbon-nitrogen ratio is ~24 g carbon/g nitrogen. In four-stage fermentations, recycle to the second fermentor and in parallel to the first three fermentors was optimal. Fermentations with excess or insufficient nitrogen had higher selectivity, but decreased yield and conversion. The glucose-utilization assay is a rapid and repeatable method for determining the amount of microbial activity in a sample. This method determined ~25% efficiency of a new cell separation method. In continuous fermentation, compared to no cell recycle, recycling cellular biomass increased selectivity and yield, but decreased conversion. Compared to lower cell reflux, higher reflux increased productivity, yield, and conversion, but decreased selectivity. Compared to residual biomass recycle, cell recycle had increased selectivity and yield, but decreased conversion. A new method to screen and rank inoculum sources from natural environments was successfully developed and tested.

Os criminosos seriais que atuam no cometimento do crime de furto possuem modos de operação (Modus operandi) distintos e, que podem ser identificados através da análise dos exames periciais utilizando-se redes neurais. No sistema proposto, identificado um determinado modo de operação, um analista forense utilizando as informações adicionais coletadas e as hipóteses geradas pelos peritos de campo tem a competência de definir conjuntos de ações periciais complementares, que serão adicionados aos registros do modo identificado. Durante um novo exame pericial, em tempo real, a sub-rotina auxiliar analisa os blocos de dados enviados pelos peritos criminais de campo e, em caso de similaridade com um modo de operação anteriormente identificado, envia a eles um conjunto de ações complementares que, a critério do responsável em campo, pode ou não ser usado para alterar o procedimento de campo escolhido. Neste trabalho definimos Neurônios Espelho como sendo a associação das redes neurais para a identificação de padrões com a planilha de trabalho, utilizada pelo analista forense para a definição de ações complementares, com a sub-rotina auxiliar que verifica os blocos de informação recebidos e, que pode identificar partes de um modo de operação, remetendo para os peritos de campo um conjunto de ações complementares. Esta definição deve-se a descoberta pela neurobiologia de um tipo especifico de neurônio que tem a capacidade de disparar ao receber um input sensorial ativando uma área de memória que, em consequência, pode ativar outras áreas de memória ou enviar um comando motor. Neste trabalho foram desenvolvidos os programas de rede neural utilizados para a identificação dos modos de operação parcial e o final, além, das planilhas de trabalho para a elaboração das ações complementares e a sub-rotina auxiliar para identificação em tempo real dos modos de operação parciais. O treinamento da rede foi efetuado com 98 ocorrências e na verificação de validade foram utilizados 10 ocorrências. / The serial criminals who operate in the commission of the crime of theft have different modes of operation (modus operandi) and which may be identified through the analysis of forensic examinations using neural networks. In the proposed system, identified a particular mode of operation, a forensic analyst using the information collected and the hypotheses generated by field experts have the competence to define sets of complementary expert shares, which will be added to the records so identified. During a new forensic examination, in real time, the auxiliary subroutine examines data blocks sent by forensic experts in the field and, in the case of similarity to previously identified a mode of operation, sends them a complementary set of actions that the discretion of the responsible in the field, or can not be used to change the procedure chosen field. In this paper we define Mirror Neurons as the association of neural networks to identify patterns with the worksheet, used by forensic analyst for the definition of complementary actions, with the auxiliary subroutine that checks the blocks of information received and that can identify parts of a mode of operation, referring to field experts a set of complementary actions. This definition should be discovered by the neurobiology of a specific type of neuron that has the ability to shoot while receiving a sensory \"input\" activating an area of memory that, in consequence, can activate other areas of memory or send a motor command. This work programs of neural network used for identifying the modes of operation and the final part were developed, in addition, the worksheets for the elaboration of complementary actions and the auxiliary subroutine for real-time identification of the modes of partial operation. Network training was performed with 98 occurrences and validity check 10 events were used.

Os criminosos seriais que atuam no cometimento do crime de furto possuem modos de operação (Modus operandi) distintos e, que podem ser identificados através da análise dos exames periciais utilizando-se redes neurais. No sistema proposto, identificado um determinado modo de operação, um analista forense utilizando as informações adicionais coletadas e as hipóteses geradas pelos peritos de campo tem a competência de definir conjuntos de ações periciais complementares, que serão adicionados aos registros do modo identificado. Durante um novo exame pericial, em tempo real, a sub-rotina auxiliar analisa os blocos de dados enviados pelos peritos criminais de campo e, em caso de similaridade com um modo de operação anteriormente identificado, envia a eles um conjunto de ações complementares que, a critério do responsável em campo, pode ou não ser usado para alterar o procedimento de campo escolhido. Neste trabalho definimos Neurônios Espelho como sendo a associação das redes neurais para a identificação de padrões com a planilha de trabalho, utilizada pelo analista forense para a definição de ações complementares, com a sub-rotina auxiliar que verifica os blocos de informação recebidos e, que pode identificar partes de um modo de operação, remetendo para os peritos de campo um conjunto de ações complementares. Esta definição deve-se a descoberta pela neurobiologia de um tipo especifico de neurônio que tem a capacidade de disparar ao receber um input sensorial ativando uma área de memória que, em consequência, pode ativar outras áreas de memória ou enviar um comando motor. Neste trabalho foram desenvolvidos os programas de rede neural utilizados para a identificação dos modos de operação parcial e o final, além, das planilhas de trabalho para a elaboração das ações complementares e a sub-rotina auxiliar para identificação em tempo real dos modos de operação parciais. O treinamento da rede foi efetuado com 98 ocorrências e na verificação de validade foram utilizados 10 ocorrências. / The serial criminals who operate in the commission of the crime of theft have different modes of operation (modus operandi) and which may be identified through the analysis of forensic examinations using neural networks. In the proposed system, identified a particular mode of operation, a forensic analyst using the information collected and the hypotheses generated by field experts have the competence to define sets of complementary expert shares, which will be added to the records so identified. During a new forensic examination, in real time, the auxiliary subroutine examines data blocks sent by forensic experts in the field and, in the case of similarity to previously identified a mode of operation, sends them a complementary set of actions that the discretion of the responsible in the field, or can not be used to change the procedure chosen field. In this paper we define Mirror Neurons as the association of neural networks to identify patterns with the worksheet, used by forensic analyst for the definition of complementary actions, with the auxiliary subroutine that checks the blocks of information received and that can identify parts of a mode of operation, referring to field experts a set of complementary actions. This definition should be discovered by the neurobiology of a specific type of neuron that has the ability to shoot while receiving a sensory \"input\" activating an area of memory that, in consequence, can activate other areas of memory or send a motor command. This work programs of neural network used for identifying the modes of operation and the final part were developed, in addition, the worksheets for the elaboration of complementary actions and the auxiliary subroutine for real-time identification of the modes of partial operation. Network training was performed with 98 occurrences and validity check 10 events were used.

Multilevel inverters play a major role in the modern day medium and high power energy conversion processes. The classic two level voltage source inverter generates PWM pole voltage output having two levels with strong fundamental component and harmonics centered around the switching frequency and its multiples. With higher switching frequency, its components can be easily filtered and results in better Total harmonic distortion (THD) output voltage and current. But with higher switching frequency, switching loss of power devices increases and electromagnetic interferences also increases. Also in two level inverter, pole voltage switches between zero and DC bus volt-age Vdc. This switching results in high dv=dt and causes EMI and increased stress on the motor winding insulation. The attractive features of multilevel inverters compared to a two level inverter are reduced switching frequency, reduced switching loss, improved volt-age and current THD, reduced dv=dt, etc. Because of these reasons, multilevel invertersultilevelinvertersplayamajorroleinthemoderndaymediumandhighpower find application in electric motor drives, transmission and distribution of power, transportation, traction, distributed generation, renewable energy systems like photo voltaic, hydel power, energy management, power quality, electric vehicle applications, etc. AC motor driven applications are consuming the significant part of the generated electrical energy (more than 60%) around the world. The multilevel inverters are ideal for such applications, since the switching frequency of the devices can be kept low with lower out-put voltage dv=dt. Also by using multilevel inverters, the common mode voltage (CMV) switching can be made zero and associated motor bearing failure can be mitigated. For multilevel inverter topologies, as the number of level increases, the power circuit becomes more complex by the increase in the number of DC power supplies, capacitors, switching devices and associated control circuitry. The main focus of development in multilevel inverter for medium and high power applications is to obtain an optimized number of voltage levels with reduced number of switching devices, capacitors and DC power sources. In this thesis, a new hybrid seven level inverter topology with a single DC supply is proposed with reduced switch count. The inverter is realized by cascading two three level flying capacitor inverters with a half bridge module. Compared to the conventional seven level inverter topologies, the proposed inverter topology uses lesser number of semiconductor devices, capacitors and DC power supplies for its operation. For this topology, capacitor voltage balancing is possible for entire modulation range irrespective of the load power factor. Also capacitor voltage can be controlled over a switching cycle and this result in lowering the capacitor sizing for the proposed topology. A simple hysteresis band based capacitor voltage balancing scheme is implemented for the inverter topology. For a voltage source inverter fed induction motor drive system, the inverter pole voltage is the sum of motor phase voltage and common mode voltage. In induction motors, there exists a parasitic capacitance between stator winding and stator iron, and between stator winding and rotor iron. Common mode voltage with significant magnitude and high frequency switching causes leakage current through these parasitic capacitances and motor bearings. This leakage current can cause ash over of bearing lubricant and corrosion of ball bearings, resulting in an early mechanical failure of the drive system. In this thesis, analysis of extending the linear modulation range of a general n-level inverter by allowing reduced magnitude of common mode voltage (CMV) switching (only Vdc/18) is presented. A new hybrid seven level inverter topology, with a single DC supply and with reduced common mode voltage (CMV) switching is presented in this thesis for the first time. Inverter is operated with zero CMV for modulation index less than 86% and is operated with a CMV magnitude of Vdc/18 to extend the linear modulation range up to 96%. Experimental results are presented for zero CMV operation and for reduced common voltage operation to extend the linear modulation range. A capacitor voltage balancing algorithm is designed utilizing the pole voltage redundancies of the inverter, which works for every sampling instant to correct the capacitor voltage irrespective of load power factor and modulation index. The capacitor voltage balancing algorithm is tested for different modulation indices and for various transient conditions, to validate the proposed topology. In recent years, model predictive control (MPC) using the system model has proved to be a good choice for the control of power converter and motor drive applications. MPC predicts system behavior using a system model and current system state. For cascaded multilevel inverter topologies with a single DC supply, closed loop capacitor voltage control is necessary for proper operation. This thesis presents zero and reduced common mode voltage (CMV) operation of a hybrid cascaded multilevel inverter with predictive capacitor voltage control. For the presented inverter topology, there are redundant switching states for each inverter voltage levels. By using these switching state redundancies, for every sampling instant, a cost function is evaluated based on the predicted capacitor voltages for each phase. The switching state which minimizes cost function is treated as the best and is switched for that sampling instant. The inverter operates with zero CMV for a modulation index upto 86%. For modulation indices from 86% to 96% the inverter can operate with reduced CMV magnitude ( Vdc/18) and reduced CMV switching frequency using the new space-vector PWM (SVPWM) presented herein. As a result, the linear modulation range is increased to 96% as compared to 86% for zero CMV operation. Simulation and experimental results are presented for the inverter topology for various steady state and transient operating conditions by running an induction motor drive with open loop V/f control scheme. The operation of a two level inverter in the over-modulation region (maximum peak phase fundamental output of inverter is greater than 0:577Vdc) results in lower order harmonics in the inverter output voltage. This lower order harmonics (mainly 5th, 7th, 11th, and 13th) causes electromagnetic torque ripple in motor drive applications. Also these harmonics causes extra losses and adversely affects the efficiency of the drive system. Also inverter control becomes non linear and special control algorithms are required for inverter operation in the over modulation region. In conventional schemes, maximum fundamental output voltage possible is 0:637Vdc. In that case inverter is operated in a square wave mode, also called six-step mode. This operation results in high dv=dt for the inverter output voltage. With multilevel inverters also, the inverter operation with peak phase fundamental output voltage above 0:577Vdc results in lower order harmonics in the inverter output voltage and results in electromagnetic torque pulsation. In this thesis, a new space vector PWM (SVPWM) method to extend the linear modulation range of a cascaded five level inverter topology with a single DC supply is presented. Using this method, the inverter can be controlled linearly and the peak phase fundamental output voltage of the inverter can be increased from 0:577Vdc to 0:637Vdc without increasing the DC bus voltage and without exceeding the induction motor voltage rating. This new technique makes use of cascaded inverter pole voltage redundancy and property of the space vector structure for its operation. Using this, the induction motor drive can be operated till the full speed range (0 Hz to 50 Hz) with the elimination of lower order harmonics in the phase voltage and phase current. The ve level topology presented in this thesis is realized by cascading a two level inverter and two full bridge modules with floating capacitors. The inverter topology and its operation for extending the modulation range is analyzed extensively. Simulation and experimental results for both steady state and dynamic operating conditions are presented. Zero common mode voltage (CMV) operation of multilevel inverters results in reduced DC bus utilization and reduced linear modulation range. In this thesis two reduced CMV SVPWM schemes are presented to extend the linear modulation range by allowing reduced CMV switching. But using these SVPWM schemes the peak phase fundamental output voltage possible is only 0:55Vdc in the linear region. In this thesis, a method to extend the linear modulation range of a CMV eliminated hybrid cascaded multilevel inverter with a single DC supply is presented. Using this method peak fundamental voltage can be increased from 0 to 0:637Vdc with zero CMV switching inside the linear modulation range. Also inverter can be controlled linearly for the entire modulation range. Also, various PWM switching sequences are analyzed in this thesis and the PWM sequence which gives minimum current ripple is used for the zero CMV operation of the inverter. The inverter topology with single DC supply is realized by cascading a two level inverter with two floating capacitor fed full bridge modules. Simulation and experimental results for steady state and dynamic operating conditions are presented to validate the proposed method. A three phase, 400 V, 3.7 kW, 50 Hz, two-pole induction motor drive with the open-loop V/f control scheme is implemented in the hardware for testing proposed inverter topology and proposed SVPWM algorithms experimentally. The semiconductor switches that were used to realize the power circuit for the experiment were 75 A, 1200 V IGBT half-bridge modules (SKM-75GB-12T4). Optoisolated gate drivers with de-saturation protection (M57962L) were used to drive the IGBTs. For the speed control and PWM timing computation, TMS320F28335 DSP is used as the main controller and Xilinx SPARTAN-3 XC3S200 FPGA as the PWM signal generator with dead time of 2.5 s. Level shifted carrier-based PWM algorithm is implemented for the normal inverter operation and zero CMV operation. From the PWM algorithm, information about the pole voltage levels to be switched can be obtained for each phase. In the sampling period, for capacitor voltage balancing of each phase, the DSP selects a switching state using the capacitor voltage information, current direction and pole voltage data for each phase. This switching state information along with the PWM timing data is sent to an FPGA module. The FPGA module generates the gating signals with a dead time of 2.5 s for the gate driver module for all the three phases by processing the switching state information and PWM signals for the given sampling period. For fundamental frequencies above 10Hz, synchronous PWM technique was used for testing the inverter topology. For modulation frequencies 10Hz and below, a constant switching frequency of 900 Hz was used. Various steady state and transient operation results are provided to validate the proposed inverter topology and the zero and reduced CMV operation schemes and extending the linear modulation scheme presented in this thesis. With the advantages like reduced switch count, single DC supply requirement, zero and reduced CMV operation, extension of linear modulation range, linear control of induction motor over the entire modulation range with zero CMV, lesser dv=dt stresses on devices and motor phase windings, lower switching frequency, inherent capacitor balancing, the proposed inverter power circuit topologies, and the SVPWM methods can be considered as good choice for medium voltage, high power motor drive applications.