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- Genre: Doctoral Dissertation
- Creators: Bakkaloglu, Bertan
- Creators: Gu, Bin
Description
Digital media refers to any form of media which depends on electronic devices for its creation, distribution, view, and storage. Digital media analytics involves qualitative and quantitative analysis from the business to understand users’ behaviors. This technique brings disruptive changes to many industries and its path of economic disruption is getting wider and wider. Under the context of the increasingly popular digital media market, this dissertation investigates what are the best content delivery strategy and the new cultural phenomenon: Internet Water Army. The first essay proposes a theory-guided computational approach that consolidates distinct data sources spanning unstructured text, image, and video data, systematically measures modes of persuasion, and unveils the multimedia content design strategies for crowdfunding projects. The second essay studies whether using the Internet Water Army helps sales and under what conditions it helps. This study finds that the Internet water army helps product sales at both post-level and fans-level. The effect is largely reflected by changing the number of emotional fans. Furthermore, the earlier to purchase the water armies, more haters, likers, and neutral fans it can attract. The last essay builds a game model to study the trade- off between honestly promoting the product according to their evaluation and catering to the consumer’s prior belief on the product quality to stay on the market as long as possible. It provides insights on the optimum usage of promotion on social media and demonstrate how conventional wisdom about negative reviews will hurt business may be misleading in the presence of social media. These three studies jointly contribute to the crowdfunding and social media studies literature by elucidating the content delivery strategy, and the impact and purchasing strategy of the Internet Water Army.
ContributorsYIN, XUEYAN (Author) / Chen, Pei-Yu (Thesis advisor) / Gu, Bin (Committee member) / Shi, Zhan (Committee member) / Benjamin, Victor (Committee member) / Arizona State University (Publisher)
Created2020
Description
Nearly all solar photovoltaic (PV) systems are designed with maximum power point tracking (MPPT) functionality to maximize the utilization of available power from the PV array throughout the day. In conventional PV systems, the MPPT function is handled by a power electronic device, like a DC-AC inverter. However, given that most PV systems are designed to be grid-connected, there are several challenges for designing PV systems for DC-powered applications and off-grid applications. The first challenge is that all power electronic devices introduce some degree of power loss. Beyond the cost of the lost power, the upfront cost of power electronics also increases with the required power rating. Second, there are very few commercially available options for DC-DC converters that include MPPT functionality, and nearly all PV inverters are designed as “grid-following” devices, as opposed to “grid-forming” devices, meaning they cannot be used in off-grid applications.
To address the challenges of designing PV systems for high-power DC and off-grid applications, a load-managing photovoltaic (LMPV) system topology has been proposed. Instead of using power electronics, the LMPV system performs maximum power point tracking through load management. By implementing a load-management approach, the upfront costs and the power losses associated with the power electronics are avoided, both of which improve the economic viability of the PV system. This work introduces the concept of an LMPV system, provides in-depth analyses through both simulation and experimental validation, and explores several potential applications of the system, such as solar-powered commercial-scale electrolyzers for the production of hydrogen fuel or the production and purification of raw materials like caustic soda, copper, and zinc.
To address the challenges of designing PV systems for high-power DC and off-grid applications, a load-managing photovoltaic (LMPV) system topology has been proposed. Instead of using power electronics, the LMPV system performs maximum power point tracking through load management. By implementing a load-management approach, the upfront costs and the power losses associated with the power electronics are avoided, both of which improve the economic viability of the PV system. This work introduces the concept of an LMPV system, provides in-depth analyses through both simulation and experimental validation, and explores several potential applications of the system, such as solar-powered commercial-scale electrolyzers for the production of hydrogen fuel or the production and purification of raw materials like caustic soda, copper, and zinc.
ContributorsAzzolini, Joseph Anthony (Author) / Tao, Meng (Thesis advisor) / Bakkaloglu, Bertan (Committee member) / Qin, Jiangchao (Committee member) / Reno, Matthew J. (Committee member) / Arizona State University (Publisher)
Created2020
Description
Modern Communication systems are progressively moving towards all-digital transmitters (ADTs) due to their high efficiency and potentially large frequency range. While significant work has been done on individual blocks within the ADT, there are few to no full systems designs at this point in time. The goal of this work is to provide a set of multiple novel block architectures which will allow for greater cohesion between the various ADT blocks. Furthermore, the design of these architectures are expected to focus on the practicalities of system design, such as regulatory compliance, which here to date has largely been neglected by the academic community. Amongst these techniques are a novel upconverted phase modulation, polyphase harmonic cancellation, and process voltage and temperature (PVT) invariant Delta Sigma phase interpolation. It will be shown in this work that the implementation of the aforementioned architectures allows ADTs to be designed with state of the art size, power, and accuracy levels, all while maintaining PVT insensitivity. Due to the significant performance enhancement over previously published works, this work presents the first feasible ADT architecture suitable for widespread commercial deployment.
ContributorsGrout, Kevin Samuel (Author) / Kitchen, Jennifer N (Thesis advisor) / Khalil, Waleed (Committee member) / Bakkaloglu, Bertan (Committee member) / Aberle, James T., 1961- (Committee member) / Garrity, Douglas (Committee member) / Arizona State University (Publisher)
Created2019
Description随着移动互联网的快速发展，共享经济在我国产业结构转型升级中作用愈来愈大，IT服务的供给和需求已逐渐卷入共享经济发展的浪潮。本文以我国产业互联网生态建设中共享经济应用的典型IT技术服务生态平台——S公司为例，系统研究线上IT技术服务模式下客户满意度的构成和影响因素。针对当前IT服务需求与资源的不均衡情况，S公司将社会化协作、共享经济等新型理念植入线上IT共享服务平台，将分散在全国范围内不同行业、不同地域、不同层次IT服务需求（客服IT服务外包）和供给（工程师、服务商资源、备品备件资源等）进行资源整合，通过APP打通了传统方式下客户需求和IT服务资源供给间的通道，并部署了云端IT服务资源池，持续为客户提供高质量的IT服务。
本文构建了客户所处不同阶段满意度量表，并结合S公司线上IT服务平台模式特征建立客户满意度影响因素研究模型，并从客户层面、工程师层面、平台层面入手构建了不同阶段实证模型。本文主要从两方面着手：第一，构建系统化的客户评价量表，并借助问卷调查法获取有效数据，为后续实证储备资源；第二，通过构建多元线性回归模式，实证检验客户对工程师的满意度的影响因素和作用机理。实证结果发现：（1）客户层面，客户自身对产品或服务价值感知的认可度越高，客户的整体满意度越高；（2）实证结果并未发现工程师年龄、性别、历史接单量对客户满意度具有显著的正向或负向影响，工程师级别越高客户满意度水平越高，交易后教育程度对客户满意度具有正向影响，工程师优质的服务评价对客户满意度具有正向影响，工程师投诉率越高客户满意度越低，订单的延期或终止（特别是由工程师发起）会大大降低客户的满意度；（3）平台层面，平台下载量越高，客户的整体满意度越高。
本文的研究框架和实证结论不仅可以丰富学术界有关线上IT服务平台的客户评价体系，而且有助于从企业提升客户粘性、提升平台流量等角度系统分析影响客户粘性的主要因素，为线上共享服务平台的发展提供借鉴。
ContributorsCao, Hongyi (Author) / Shao, Benjamin (Thesis advisor) / Li, Xianglin (Thesis advisor) / Gu, Bin (Committee member) / Arizona State University (Publisher)
Created2021
Description
This thesis presents three novel studies. The first two works focus on galvanically isolated chip-to-chip communication, and the third research studies class-E pulse-width modulated power amplifiers. First, a common-mode resilient CMOS (complementary metal-oxide-semiconductor) galvanically isolated Radio Frequency (RF) chip-to-chip communication system is presented utilizing laterally resonant coupled circuits to increases maximum common-mode transient immunity and the isolation capability of galvanic isolators in a low-cost standard CMOS solution beyond the limits provided from the vertical coupling. The design provides the highest reported CMTI (common-mode transient immunity) of more than 600 kV/µs, 5 kVpk isolation, and a chip area of 0.95 mm2. In the second work, a bi-directional ultra-wideband transformer-coupled galvanic isolator is reported for the first time. The proposed design merges the functionality of two isolated channels into one magnetically coupled communication, enabling up to 50% form-factor and assembly cost reduction while achieving a simultaneously robust and state-of-art performance. This work achieves simultaneous robust, wideband, and energy-efficient performance of 300 Mb/s data rate, isolation of 7.8 kVrms, and power consumption and propagation delay of 200 pJ/b and 5 ns, respectively, in only 0.8 mm2 area. The third works studies class-E pulse-width modulated (PWM) Power amplifiers (PAs). For the first time, it presents a design technique to significantly extend the Power back-off (PBO) dynamic range of PWM PAs over the prior art. A proof-of-concept watt-level class-E PA is designed using a GaN HEMT and exhibits more than 6dB dynamic range for a 50 to 30 percent duty cycle variation. Moreover, in this work, the effects of non-idealities on performance and design of class-E power amplifiers for variable supply on and pulse-width operations are characterized and studied, including the effect of non-linear parasitic capacitances and its exploitation for enhancement of average efficiency and self-heating effects in class-E SMPAs using a new over dry-ice measurement technique was presented for this first time. The non-ideality study allows for capturing a full view of the design requirement and considerations of class-E power amplifiers and provides a window to the phenomena that lead to a mismatch between the ideal and actual performance of class-E power amplifiers and their root causes.
ContributorsJavidahmadabadi, Mahdi (Author) / Kitchen, Jennifer N (Thesis advisor) / Aberle, James (Committee member) / Bakkaloglu, Bertan (Committee member) / Burton, Richard (Committee member) / Arizona State University (Publisher)
Created2021
Description
Impedance is one of the fundamental properties of electrical components, materials, and waves. Therefore, impedance measurement and monitoring have a wide range of applications. The multi-port technique is a natural candidate for impedance measurement and monitoring due to its low overhead and ease of implementation for Built-in Self-Test (BIST) applications. The multi-port technique can measure complex reflection coefficients, thus impedance, by using scalar measurements provided by the power detectors. These power detectors are strategically placed on different points (ports) of a passive network to produce unique solution. Impedance measurement and monitoring is readily deployed on mobile phone radio-frequency (RF) front ends, and are combined with antenna tuners to boost the signal reception capabilities of phones. These sensors also can be used in self-healing circuits to improve their yield and performance under process, voltage, and temperature variations. Even though, this work is preliminary interested in low-overhead impedance measurement for RF circuit applications, the proposed methods can be used in a wide variety of metrology applications where impedance measurements are already used. Some examples of these applications include determining material properties, plasma generation, and moisture detection. Additionally, multi-port applications extend beyond the impedance measurement. There are applications where multi-ports are used as receivers for communication systems, RADARs, and remote sensing applications. The multi-port technique generally requires a careful design of the testing structure to produce a unique solution from power detector measurements. It also requires the use of nonlinear solvers during calibration, and depending on calibration procedure, measurement. The use of nonlinear solvers generates issues for convergence, computational complexity, and resources needed for carrying out calibrations and measurements in a timely manner. In this work, using periodic structures, a structure where a circuit block repeats itself, for multi-port measurements is proposed. The periodic structures introduce a new constraint that simplifies the multi-port theory and leads to an explicit calibration and measurement procedure. Unlike the existing calibration procedures which require at least five loads and various constraints on the load for explicit solution, the proposed method can use three loads for calibration. Multi-ports built with periodic structures will always produce a unique measurement result. This leads to increased bandwidth of operation and simplifies design procedure. The efficacy of the method demonstrated in two embodiments.
In the first embodiment, a multi-port is directly embedded into a matching network to measure impedance of the load.
In the second embodiment, periodic structures are used to compare two loads without requiring any calibration.
ContributorsAvci, Muslum Emir (Author) / Ozev, Sule (Thesis advisor) / Bakkaloglu, Bertan (Committee member) / Kitchen, Jennifer (Committee member) / Trichopoulos, Georgios (Committee member) / Arizona State University (Publisher)
Created2023
Description
As securities companies occupy an increasingly important position in the national economy, and the most valuable competitive advantage for whom is human resources; therefore, Security Industry practitioners pay close attention to the influences of securities companies' incentive mechanisms regarding to various business types.
This paper finds that asymmetry of information in business models is the motivation of the gaming for all participants, through analyzing the differences of various business models of securities brokerage services. Further, various incentive mechanisms under different circumstances result in diverse strategies of gaming. It varies development paths of securities companies. Therefore, the purpose of the paper is to theoretically deduce the most reasonable and optimal securities companies’ incentive mechanism.
This paper intends to identify the principle component factors influencing securities brokerage services via questionnaire investigations towards 75 branches under the same securities company and 13 different securities companies, respectively. In addition, based on historical data, the paper aim to explain rationales between adjustments of incentive mechanisms and market shares of securities brokerage services.Lastly, combining author’s personal experience of various incentive mechanisms and development tracks in four securities companies that hopefully presents valuable information and clues for deducing the optimal securities company incentive mechanism.
There are two critical agency relationships in securities brokerage services. One is between principals, securities companies, and agents which are directors of branches. The other is between principals, securities companies, and agents which are securities marketers or brokers. Because of such operational setup, information is highly asymmetrical between all parties. It brought prominent problems regarding agency relationship and motivation aspects.
Under the certain circumstances, implementation of Incomplete Contracting Theory with franchising models in securities companies is quite useful. Specifically, for the former relationship between securities companies and marketers, the motivation effects of sub-license franchising are better than bonus compensation structure. Fixed salaries without bonus have the worst stimulating effects in such business model. For the latter relationship between securities companies and directors of branches, the agents focus on long term residual value claim rights, since it coincides with agents’ appraisals, focusing on incremental market shares and profit drawings.
This paper finds that asymmetry of information in business models is the motivation of the gaming for all participants, through analyzing the differences of various business models of securities brokerage services. Further, various incentive mechanisms under different circumstances result in diverse strategies of gaming. It varies development paths of securities companies. Therefore, the purpose of the paper is to theoretically deduce the most reasonable and optimal securities companies’ incentive mechanism.
This paper intends to identify the principle component factors influencing securities brokerage services via questionnaire investigations towards 75 branches under the same securities company and 13 different securities companies, respectively. In addition, based on historical data, the paper aim to explain rationales between adjustments of incentive mechanisms and market shares of securities brokerage services.Lastly, combining author’s personal experience of various incentive mechanisms and development tracks in four securities companies that hopefully presents valuable information and clues for deducing the optimal securities company incentive mechanism.
There are two critical agency relationships in securities brokerage services. One is between principals, securities companies, and agents which are directors of branches. The other is between principals, securities companies, and agents which are securities marketers or brokers. Because of such operational setup, information is highly asymmetrical between all parties. It brought prominent problems regarding agency relationship and motivation aspects.
Under the certain circumstances, implementation of Incomplete Contracting Theory with franchising models in securities companies is quite useful. Specifically, for the former relationship between securities companies and marketers, the motivation effects of sub-license franchising are better than bonus compensation structure. Fixed salaries without bonus have the worst stimulating effects in such business model. For the latter relationship between securities companies and directors of branches, the agents focus on long term residual value claim rights, since it coincides with agents’ appraisals, focusing on incremental market shares and profit drawings.
ContributorsZhang, Xiangdong (Author) / Pei, Ker-Wei (Thesis advisor) / Li, Feng (Thesis advisor) / Gu, Bin (Committee member) / Arizona State University (Publisher)
Created2018
Description
This study investigates the impact of a specific organizational form – partnership – on employees’ awareness of risk control and job engagement in securities companies. Given that their organizational performance relies heavily on the performance of individual employees, it is critical for securities companies in China to adopt appropriate organizational forms so that they can better captalize on their employees’ human capital to cope with the increasingly intense market competition. Partnership, as one of the few organizational forms, has been widely adopted in industries that rely on the performance of individuals, such as law, auditing, consulting, and investment banking, around the world. In the context of China’s emerging economy, it has also been adopted as an incentive system by market leaders across several industries, including Alibaba in online shopping, Vanke in real estate, and Fosun in investments. In contrast, partnership has not been adopted or implemented by securities companies in China as most of them are still state-owned enterprises.
Based on my review of the corporate governance literature and qualitative analysis of partnership adoption in China, I propose that partnership can help better alighn the interests of employees with owners in securities companies as well. Specifically, the prospect of becoming a partner in the future can improve employees’ awareness of risk control and increase their job engagement. Taking advantage of partnership adoption at a Chinese securities company as a natural field experienment, I surveyed its employees about their awareness of risk contrl and job dedication before and after the adoption. The results from 505 matched surveys showed an increase in the average scores of both awareness of risk control and job dedication after the company adopted partnership as a new organizational form. Findings of this study have important implications for organizational and incentive design for securities companies in China.
Based on my review of the corporate governance literature and qualitative analysis of partnership adoption in China, I propose that partnership can help better alighn the interests of employees with owners in securities companies as well. Specifically, the prospect of becoming a partner in the future can improve employees’ awareness of risk control and increase their job engagement. Taking advantage of partnership adoption at a Chinese securities company as a natural field experienment, I surveyed its employees about their awareness of risk contrl and job dedication before and after the adoption. The results from 505 matched surveys showed an increase in the average scores of both awareness of risk control and job dedication after the company adopted partnership as a new organizational form. Findings of this study have important implications for organizational and incentive design for securities companies in China.
ContributorsSha, Changming (Author) / Shen, Wei (Thesis advisor) / Li, Feng (Thesis advisor) / Gu, Bin (Committee member) / Arizona State University (Publisher)
Created2018
Description
Valuation adjustment mechanism has been widely applied in acquisitions of listed companies in China today, and is usually agreed upon future financial performance indicators of acquired companies (mostly net income). This paper examines how changes of key contents of VAM agreement affect firms’ ability to meet performance commitments from the perspective of incentive effects. Empirical results show that as the performance goals set in VAM agreement becomes higher, the incentive for management to meet performance commitments will initially increase and then decrease, so that the ratio of actual profits to promised profits for target firms will reach peak at some reasonable performance goal and then decrease. Second, as the level of the information asymmetry between buyer and seller turns higher, the incentive effect of performance goals becomes lower. Third, compared with cash-based compensation, stock-based compensation shows significantly higher incentive effects on promisors thus increasing the ability for target firms to achieve performance commitments.
ContributorsWang, Yixin (Author) / Gu, Bin (Thesis advisor) / Yu, Xiaoyun (Thesis advisor) / Jiang, Zhan (Committee member) / Arizona State University (Publisher)
Created2018
Description
China's city commercial banks were reorganized by the urban credit cooperatives in the same city in the 1990s. Although they are allowed to open branches outside the registered city, the location and the number of their branches have been strictly restricted. It is fatal to them to increase the competitiveness of their branches. Based on the diversity theory and its mechanism, in this study I examined the impact of source diversity of the senior management in the branches of the city commercial bank on the branches’ productivity and their asset yield. Invoking the resource-based theory and the social capital framework, the source diversity lead to the organization resources diversity and the organization knowledge diversity. The results demonstrate that the source diversity contribute to the branches’ competitiveness advantage. Both internal trained personnel and external introduction personnel are important for the branches’ top management team. But one of the two kinds of personnel is more suitable to their middle management team.
ContributorsZhang, Xiande (Author) / Gu, Bin (Thesis advisor) / Wang, Tan (Thesis advisor) / Shen, Wei (Committee member) / Arizona State University (Publisher)
Created2017