34254 research outputs found
Sort by
Resource Allocation Design for Enhanced URLLC using Reconfigurable Intelligent Surfaces and Next-generation Multiple Access Schemes
No full textThis thesis presents a comprehensive investigation into resource allocation designs for enhancing Ultra-Reliable low latency communication (URLLC) in reconfigurable intelligent surface (RIS)-aided systems. In order to support the need for higher spectral and energy efficiencies with a wider coverage area, we propose different novel intelligent surface-assisted analytical frameworks: an unconventional RIS-aided full-duplex non-orthogonal multiple access (FD-NOMA) systems, an aerial RIS (ARIS)-assisted rate splitting multiple access (RSMA) multi-user multiple-input multiple-output (MU-MIMO) downlink (DL) scheme, and an energy-efficient simultaneous transmitting and reflecting (STAR-RIS) aided MU-MIMO system. Primarily, our goal is to optimize and achieve highest possible spectral efficiency and energy efficiency, amidst ensuring the satisfaction of minimum rate, delay, and reliability requirements. Due to the inherent lack of convexity and the computationally intractable nature of the original problem, we solve the joint optimization problem using alternating optimization where the subproblems of beamforming design, power allocation, ARIS height determination using successive convex approximations, particle swarm optimization (PSO), and fractional programming respectively. Numerical simulation and analysis of computational complexity validate the proposed solution attains rapid convergence within a few iterations. Specifically, among all the possible modes of STAR-RIS, the time-splitting mode renders an effective solution due to its better interference management
Virtual YouTubers: The Value Born from Reality and Fantasy
No full textThe research was conducted through face-to-face interviews and online forums with fans to discuss the various values that Virtual Youtubers can create, values that were specifically discussed were religious, entertainment and social values, accompanied by others. Religious values were discussed because fans perform religious-like actions such as worshipping, offerings, and recruitments. Through discussion only minor fans see Virtual Youtubers as a religion, and majority consider it as entertainment.
Therefore, we discuss the entertainment value of Virtual Youtubers through applying concepts of a \ue2game,\ue2 for which 6 elements were considered. It was concluded that Virtual Youtubers meet the concept of a \ue2game,\ue2 but it does not only satisfy the entertainment values such as joy, but it also fulfills social values such as involvement and motivation for an individual
Intra- and Intermolecular Hydrogen Bonding of PCHC-based Copolymer and Poly(Vinyl Phenol) Miscible Blends
No full textIn this work, through ring opening copolymerization (ROCOP), the cyclohexene oxide (CHO) was used as the main monomer to carry out high pressure polymerization with metal catalyst and carbon dioxide (CO2), and the poly(cyclohexene carbonate) (PCHC) was successfully synthesized. Through FTIR and NMR analyses of its structure, indicating that the PCHC copolymer was successfully synthesized. Furthermore, in two-dimensional correlation spectroscopy, PCHC was found to possess intramolecular hydrogen bonds, making PCHC less miscible with other polymers. Therefore, poly(vinyl phenol) (PVPh) with a strong hydrogen bond donor was selected for blending, and the change of hydrogen bond interaction between PCHC and PVPh was also investigated. In the blending experiment, the between PCHC and PVPh can be observed by measuring the binary blend, using DSC and ssNMR. Because intermolecular H-bonding of PCHC/PVPh binary blend is weak, the Tg values measured by DSC analyses exhibited negative deviations from the linear equation.
In the second part, epoxy cyclohexyl isobutyl POSS (CHO-POSS) is added for polymerization to form a terpolymer poly(PCHC-co-PCHCPOSS). Identify its structure and properties through NMR, FTIR, and DSC, and explore the impact of POSS on polymer properties. Due to its huge volume, the free volume of the polymer increases, the glass transition temperature decreases and two phases gradually appear in POSS
A Study of Succession Planning of Family Business - A Case Study of A Company
No full textFamily businesses are a common business model. Since the peak of entrepreneurship in Taiwan from 1970 to 1990, which marked the peak of second-generation succession, the literature has shown that the inheritance difficulties of family businesses include issues such as loss of technical skills, talent drain, and insufficient successor capabilities. Ensuring the sustainable operation and development of family businesses is a common issue for all enterprises.
Company A has been in business for over 20 years, mainly engaged in the domestic distribution and sales of medical equipment. The founder has reached retirement age, but succession has not been arranged, and the successor has problems with management and leadership abilities. This study aims to develop a succession plan for Company A.
This study used in-depth interviews with three manufacturing business owners, all of whose businesses operate overseas and have achieved successful succession. Through the interviews, the context and challenges of the three businesses' successions were thoroughly understood, and successful experiences were extracted as the basis for succession planning.
The interview results of the three business owners, combined with literature research, show that the most important part of succession is to plan early, have sufficient time, and a good training program, allowing the successor to grow into an independent entrepreneur. This will ensure the sustainable operation of the business
Aqueous Suzuki Couplings Mediated by a Diarylamido Phosphine Complex of Palladium
No full textThe remarkable name reactions such as Suzuki couplings, Heck reaction and Kumada couplings had successfully catalyzed by [Ph-PNP]PdCl. The pincer complex also exhibited its water adaptability in particular reaction condition and proved the thermal stability at temperature as high as 200 oC.
The catalytic activity of [Ph-PNP]PdCl in aerobic aqueous Suzuki couplings is described. Though hydrophobic, this molecular catalyst is competent in cross-coupling reactions of arylboronic acids with a variety of electronically activated, unactivated, and deactivated aryl iodides, bromides, and chlorides upon heating in aqueous solutions under aerobic conditions to give biphenyl derivatives without the necessity of amphiphiles. Even in the presence of an excess amount of mercury, [Ph-PNP]PdCl maintains the molecular structure without any Pd(0) nanoparticles emerges.
Keywords: aqueous Suzuki couplings, water adaptability, thermal stability, without amphiphiles, without Pd(0) nanoparticles
Rational Design of Ultrastable Fluoresecnt Polymers Containing Double-Decker Silsesquioxane and Benzoxazine Units: Thermal Stability, and Aggregation-Enhanced Emission
No full textPart A
In this work, the first part we synthesized the double-decker silsesquioxane (DDSQ)-functionalized prepared with NaN3. By using the Cu(I)-catalyzed azide-alkyne click polymerization with a series of DDSQ units. Among AIE effect systems, tetraphenylethylene (TPE) units and their corresponding polymers are the typical materials that have received the most popular topic on the fluorescence behavior and development. In addition, DDSQ-containing nanocomposite units in their main chains could exhibit high thermal stability and exhibited a good fluorescent property. Based on these results, we could conclude that the synthesized a powerful of high thermal and high well-defined fluorescent performance that could be attributed to the after click reaction with the TPE units.
Part B
In the second part of our study, we synthesized main chain benzoxazine monomers and prepared P-NH monomer with high thermal stability and fluorescence excitation effects through ring-opening polymerization (ROP). The resulting copolymers exhibited exceptional thermal stability and high fluorescence excitation after ROP process. The BZ-O monomer had a char yield of 56.7 wt% (Td5 = 318 \ue2, Td10 = 386 \ue2), while BZ-S monomer showed a char yield of 61.9 wt% (Td5 = 368 \ue2, Td10 = 407 \ue2). Furthermore, after curing temperatures, these copolymers demonstrated low surface free energy characteristics with surface properties of 28.96 mJ/m\uc2\ub2 for BZ-O and 34.10 mJ/m\uc2\ub2 for BZ-S. Consequently, our copolymers, with benzoxazine as the main chain structure exhibited excellent thermal stability and the potential for intense fluorescence excitation
Analysis on the Development Trend of 5G AIoT Smart Industrial Security Platform
No full textDuring occupational safety and health incidents, losses in terms of both life and property can occur. This thesis explores the feasibility of a 5G AIOT intelligent security platform developed as part of a scientific and technological project. It aims to identify the problems associated with current factory safety and security measures, compare homogeneous security platforms, and enhance the feasibility of this 5G AIOT intelligent security platform through the use of the latest technology.
The challenges faced by Taiwanese factories in terms of safety and security measures and inspections include insufficient manpower, aging equipment, poor working conditions, lack of training, and failure to establish standards. Workers operate in an unsafe working environment and must rely on caution to prevent accidents. Achieving zero occupational accidents requires suitable safety and security tools.
In terms of market demand, according to the "Taiwan Smart Manufacturing Development Status and Investment Demand Survey" published by MIC in December 2020, compared to 2016, the degree of smart manufacturing development in Taiwan had grown by 14.3% in 2020. Moreover, up to 90% of businesses have either implemented or expressed interest in implementing AI-based smart security applications.
With the advent of the latest technologies such as 5G, AI, metaverse, and AIoT, and with the help of faster data transmission, more intelligent and faster computing, these technologies have accelerated the evolution of the era's industries and lifestyles. This includes smart cities, factory automation, smart healthcare, smart homes, smart transportation, etc. The 5G AIOT intelligent security platform described in this thesis also employs the latest technologies, introduces proprietary 5G AIoT technology, and uses AR/VR and high-efficiency sensing devices in combination with Taiwanese manufacturer teams to verify the performance of this security platform in real-world scenarios. This platform is an open, collaborative technological platform that allows related industries to participate and continuously collaborate in research and development, and expand related applications. It is hoped that this will create a representative 5G and AIoT industry linkage and cluster paradigm in Taiwan and deepen international links
Preparation of Main-Chain Polymer and Porous Carbons by Double-Decker Silsesquioxanes
No full textPart 1, we synthesized main-chain benzoxazine, which is PDMS-DABZ-DDSQ copolymer (DA-BZ), through the Diels-Alder reaction by using double-decker silsesquioxanes monomers with maleimide groups (DDSQ-BMI) and polydimethylsiloxane-benzoxazine monomers with furan groups (PDMS-FBZ). The structure of the DA-BZ was identified by FTIR and 1H NMR measurements. According to the thermogravimetric analyzer (TGA), differential scanning calorimetry (DSC), dynamic mechanical analyzer (DMA) and contact angle (CA) measurement, this copolymer demonstrated high flexibility, excellent thermal stability (Tg = 177 oC, Td10 = 441 oC and char yield = 60.1 wt.%) and low surface free energy (18.18 mJ/m2) after thermal ring-opening polymerization (ROP). In addition, we also observed the thermos-reversible phenomenon of the DA reaction and DA-BZ has reversible function during partial curing process by solubility test and optical microscope.
Part 2, three types of organic-inorganic hybrids synthesized through hydrosilylation of the Double-Decker silsesquioxane (DDSQ) with divinylbenzene (DVB), divinyl-DDSQ (DV-DDSQ), and cubic octavinylsilsesquioxane (OVS), respectively. Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopy confirmed the structure of them. TGA measurements revealed that OVS-DDSQ possesses high thermal stability (Td10 =596 \uc2\ub0C; char yield = 82 wt%); Furthermore, OVS-DDSQ features electrochemical performance with specific capacitances of 24.5 F g-1 at 0.5 A g\ue21. In order to increase the electrochemical performance, we carbonized to increase the surface area. According to the BET analyses, its surface area shows 169 m2 g\ue21 and the electrochemical performance increases to 149.2 F g-1 at 0.5 A g\ue21, besides having outstanding stability (98% of the average capacitance was retained at 20 A g-1 after 5000 cycles)
Exploration on Response Strategies of Taiwan Electricity Industry for Net-Zero Transition
No full textThe research aims to explore Taiwan\ue2s electricity industry how to cope with the challenges of climate change. Accompanied with the opening-and-closure COP26, NZE has become a global trend. Most countries have pledged to reduce the use of fossil fuels to achieve the goal of 2050 NZE. With no exception, Taiwan has committed to the goal of NZE by 2050.
In this research, we review the relevant literatures and utilize the strategies and measures collected from worldwide NZE cases to compare with the domestic policies and measures under discussion to bring forward some recommendations. The results of this research may serve as reference for the government to formulate emission reduction policies.
The results of this research have the following conclusions: The first, in response to the challenges of large-scale integration of renewable energy sources. Government can discuss regarding the potential of hydrogen energy in the promotion of clean energy and low-carbon hydrogen energy technology. The second, promoting carbon reduction, zero carbon power resources, electrification, carbon capture and low carbon co-firing technology. Lastly, evaluating the development of small modular reactors (SMRs)
Enjoy working alone? Exploring the relationship between daily solitude at work, creativity and cyberloafing: The mediating roles of autonomy need satisfaction and loneliness at work, and the moderating role of physical work environment
No full textIn recent years, due to the changing nature of work, the trend of working solitude in the workplace has gradually emerged. While working solitude can bring benefits, it can also have negative impacts. However, previous research has been limited in integrating theoretical frameworks and has not fully elucidated the complex consequences of working solitude in the workplace. Therefore, this study adopts Self-Determination Theory as the theoretical framework to explore both the positive and negative pathways of working solitude, incorporating autonomous needs satisfaction and work loneliness as mediating variables. Additionally, situational variables (i.e., office environment interactivity) are included to clarify their moderating effects and examine whether the level of office environment interaction influences the positive or negative experiences employees encounter when working solitude.
In this study, an experience sampling method was used to collect data from a sample of 229 full-time employees who either worked alone in the office or in other settings, or lacked social interaction with others while in the office. Data collection was carried out for ten consecutive workdays, and the end-of-day data from each day were paired with the next day's end-of-day data, resulting in a total of 2003 matched daily responses. The research findings indicate that: (1) Daily solitude at work positively predict autonomy need satisfaction, which further positively predicts daily creativity. In addition, high level of office environment interactivity can strengthen this positive indirect effect; (2) Daily solitude at work positively predict workplace loneliness, which further positively predicts cyberloafing behavior. However, high level of office environment interactivity can attenuate this positive indirect effect. Overall, this study offers practical and theoretical insights for organizations and individuals facing the challenge of daily solitude at work and contributes to the field of physical work environment research