34254 research outputs found
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The impact of new ventures employer brand image on organizational attractiveness
No full textTalent is a vital resource for new ventures and is also one of the important factors affecting the success or failure of new ventures. However, job seekers are less familiar with new ventures which lack resources in the early stages of business. New ventures often encounter difficulties in recruiting talent and attracting the attention of job seekers. Although employer brand image can enhance organizational attractiveness and improve recruitment performance, it is unable to apply to new ventures. Therefore, this study integrates optimal distinctiveness theory with employer brand literature to address this research gap and to improve the organizational attractiveness of new ventures with an optimal distinctive employer image. This research conducts field experiments on the interview invitation email in the actual process of recruiting sales representatives for the focal new venture. The email encompasses messages depicting the symbolic images (innovative and warm) of the new venture. The participants are 240 actual job seekers who are qualified candidates\ue2 fitting criteria including living in the Taipei metropolitan area, having more than one year of sales work experience, with ages between 22 and 3 ages and with a bachelor\ue2s degree or above \ue2for the new venture. Text messages were randomly assigned to the emails sent to job seekers, and the attractiveness of the organization was measured by whether or not potential job seekers accepted interview invitations. This study verifies the impact of a new venture's employer brand image positioning on organizational attractiveness. Based on the research results, this study discusses the theoretical and practical implications of the research
Study on Physical Mechanism of Resistive Random Access Memory Device and Supercritical Fluid Technique for Semiconductor Device
No full textWith the fast development of technology, there have been so many electronic products in our daily lives. The concept of the Internet of things (IoT) get more and more attention because of the requirement of applications. The evolution of memory devices dominates the advancement, and among the next-generation memory devices, resistive random access memory (RRAM) has the most potential because of its advantages of low power-consumption and high performance.
In addition, this research develops a novel supercritical fluid (SCF) technology, which can modify electronic devices and reduce material defects at low temperatures (RT~250\uc2\ub0C), greatly improving the performance and the reliability of electronic devices. In this study, this technology is applied to optimize the electrochromic performance and increase the selectivity and the moisture resistance of alcohol gas sensors.
In Chapter 3, the transparent resistive switching layer is realized by co-sputtering different powers of gadolinium on indium tin oxide thin film. Film transparency and surface flatness are verified by utilizing material analyses. Using this thin film as the switching layer of the RRAM enables the memory to have stable resistance switching characteristics and very low operating voltages and power consumption. Such RRAM also demonstrates the potential for data storage on transparent devices. Finally, a physical model is suggested on the basis of material analyses.
In Chapter 4, varying current compliances are utilized to control the thickness of conduction filaments in the RRAM, while also the resistance switching properties of a single RRAM device with both unipolar and bipolar operations is realized. The reliability of the device is confirmed by electrical measurements. Finally, a physical model is suggested on the basis of material analyses.
In Chapter 5, with the high-pressure carbon dioxide treatment, electrochromic element performance and dependability are significantly increased. After the treatment, the middle layer's lithium tantalum oxygen electrolyte crystallizes, which significantly boosts the bleaching transparency and the coloring rate. Electrochromic devices are treated with high pressure carbon dioxide to improve color retention and switching stability. High-resolution transmission electron microscopy is used to show how crystalline phase development occurs.
In Chapter 6, the supercritical-fluid (SCF) technique is used for changing the Tin oxide film. Sulfur element is drawn in to form bonds due to the high solubility and the penetration of supercritical fluid. Boost sensing sensitivity is enhanced, moisture influence is eliminated, and then suggest a model of the linked physical mechanism based on material analyses is proposed
Using next generation sequencing to analyze the diet composition of terns from feces in the South Penghu Marine National Park
No full textThe diet of seabirds usually reflects the abundance of prey and serves as indicators of fish abundance and health of marine ecosystem. However, the traditional methods of investigating diet composition still have many disadvantages. As molecular technology develops, Next Generation Sequencing (NGS) is applied to analyze the diet composition from fecal samples. In the present study, 250 fecal samples were collected in the South Penghu Marine National Park, and 82 fecal samples were successfully amplified and sequenced using NGS. The diet composition of all samples contain 108 preys which belong to 98 species of 44 families, and the rest can only be identified to genus or family level. The Apogonidae, Nomeidae, Siganidae, Mullidae and Clupeida were relatively dominant. The results of PCA revealed the dominant preys vary in different months. The Mullidae were the dominant prey in May, followed by the Nomeidae and Siganidae dominant in June, and the Apogonidae were dominant in August. Sequences of bridled terns were detected in 52 samples (out of 81; 64.1%), and their diet compositions contain 80 preys belonging to 74 species of 37 families. The dominant prey of bridled terns are similar to the prey of all samples. Some fishes are not likely to be preyed by terns because of their habit, including the nocturnal families Apogonidae and Nomeidae. However, bridled terns are considered active at night. It is reasonable to find some prey including the Apogonidae and Nomeidae in the present study. Compared to previous studies, the diversity of prey and accuracy of identification are higher than previous studies. However, the main prey of in the present study is not of the Clupeidae, the dominant prey in previous studies. The local fish fauna of SPMNP is also compared to diet composition of terns, and 71 prey items have not been recorded. However, most of prey have been recorded in Penghu. In summary, the result successfully shows the diet composition of terns from fecal samples by using DNA metabarcoding. DNA metabarcoding have more advantage than traditional methods, and it is a non-invasive and more precise method to investigate the dietary composition
Network congestion control performance measure and analysis
No full textAs the Internet has evolved, link bandwidth has increased dramatically, and many data-intensive applications have emerged to benefit from this increased bandwidth. Since most applications still use TCP as the primary transport protocol, TCP is often considered to be relatively inefficient and conservative and does not make full use of bandwidth.
Although UDP has a high transmission speed, it is unreliable because of packet loss depending on the prevailing network conditions. It is very important to define an efficient control mechanism for the UDP protocol.
Therefore, this research aims to deploy the three congestion control mechanisms, UDT, CTCP, and CBIC TCP, through the Composable framework provided by UDT, and to perform UDP protocol-based network transmission. The experiments were conducted by setting different network conditions and finally investigating the performance of the three congestion control mechanisms in different network conditions
The reaction directionality mechanism of \u3d5C31 integrase with recombination directionality factor
No full textSerine integrases catalyse a site-specific recombination between an attachment site in the host (attB) and an attachment site in the phage(attP). The reverse reaction requires an additional protein, the recombination directionality factor (RDF ) to mediate recombination between attL and attR. The RDF is known to bind integrase and switch its activity from integration (attP x attB) to excision (attL x attR) , the RDF play an important role in regulating reaction directionality mechanism. In previous study, gp3 binds to the C-terminal 200 amino acids of \uc3C31 integrase. We will show the integrase mutant reduce gp3 binding in excision and integration reactions. From TPM experiments, residue substitutions in integrase (W526R, W526A, I420A and I582A) not only have effect on binding to gp3 ,but also decrease the binding rate. The integrase mutant reduces the activity at attP \uc3 attB recombination in the absence of gp3, IntI420A and Int582A are both severely inhibited in integration reaction.From the BM amplitude of synapse state suggests that IntW526R, IntW526A, IntI420A and IntI582A exhibits different topology preference compared to wild-type \uc3C31 integrase, and the integrase mutant disturb interaction with gp3 on attL x attR recombination make the recombination successful
Probing Ozonolysis of Monoterpenes and Formation of Secondary Organic Aerosols by Density Functional Theory Calculation and Electron Paramagnetic Resonance Spectroscopy
No full textAerosols are broadly referred to droplets or ultrafine particles suspended in the air. The aerosol has been considered as a crucial role in numerous research fields. The aerosol is also the important factor in controlling global climate by affecting the formation of clouds or absorbing sunlight. Organic aerosols (OA) account for 20-90% to the total fine aerosol mass. Secondary organic aerosols (SOA) account for major fraction of organic aerosols. Ozonolysis of mononterpene is the major source of secondary organic aerosols in atmosphere. To better understand the monoterpene ozonolysis reactions, we use density functional theory calculation to get the potential energy profiles for reactions of three monoterpenes, limonene, \uce\ub1-pinene and \uce\ub2-pinene, with ozone. Since water is more abundant than other trace gas in atmosphere and monoterpenes often dissolved in ethanol in reaction experiments, we also probe the participation of water and ethanol in monoterpene ozonolysis with theoretical calculation. The result shows hydroxyalkyl hydroperoxide (HHP) channel is the favorable pathway in most reactions with attendance of water. Ethanol can be competitive with water in the reaction with Criegee Intermediate formed in ozonolysis of monoterpenes. The another method we use in this thesis is the electron paramagnetic resonance spectroscopy. We collect the products formed from ozonolysis of limonene on filter paper. After appropriate sample preparation, we inlet the sample to the electron paramagnetic resonance spectroscopy to acquire the free radical informations in the reaction. We can find different amount of hydroxyl radicals and carbon-centered organic radicals form with different water doses or ozone levels in ozonolysis of limonene
Synthesis of Two Dimensional Rhodamine Surface Modified Metallic Nanosheets and their Application as Biosensors
No full textTwo-dimensional nanomaterials can act as good charge acceptors or donors, giving these materials quite attractive optical properties. In addition, materials used as biosensors need to be highly selective for analytes and have reproducible functions. Therefore, two-dimensional nanomaterials have gradually been widely used in the field of molecular biomedical detection.
In this thesis, the composite two-dimensional nanosheets were prepared with two metal salts of stannous chloride and molybdenum trichloride and different types of rhodamine by probe-type ultrasonic synthesis method, and then detected by ultraviolet-visible spectrometer for their optical properties, and the various 2D nanosheets after synthesis are detected by the fluorescence spectrometer to detect the change of fluorescence intensity over time, in order to measure the best measurement time and select the two-dimensional nanosheets with the optimal stable fluorescence, and then the most suitable nanosheets are measured by TEM, SAED, EDS, and XRD as follow-up applications.
It has been found and confirmed through experiments that in the biochemical tests of rhodamine 6G modified two-dimensional amorphous tin oxide and molybdenum oxide, it can be found that both are fluorescence quenching phenomena. In the biochemical test of two-dimensional amorphous tin oxide and molybdenum oxide modified by rhodamine 123, the addition of tryptophan and epinephrine has the effect of rapidly quenching the fluorescence, but when it is increased to 10nM, the fluorescence intensity rapidly pick up. In the test of dopamine on the two-dimensional amorphous molybdenum oxide modified by rhodamine 123, it was found that both of them had fluorescence enhancement effect (AIE), especially the two-dimensional amorphous molybdenum oxide modified by rhodamine 123 was the most obvious. No matter what kind of rhodamine-modified two-dimensional amorphous metal nanosheets, cysteamine has the phenomenon of rapidly quenching fluorescence, and the effect is very obvious when added in a small amount
The anti-melanoma effect and mechanism of marine carotenoid Fucoxanthin : the role of STAT3 signaling pathway
No full textFucoxanthin is a carotenoid found in macroalgae and microalgae. The main functions of this kind of pigment are as a light-harvesting complex for photosynthesis or as a photo protectant. In recent years, Fucoxanthin has been confirmed to have many beneficial biological activities, such as anti-cancer, anti-oxidation, anti-inflammatory, anti-diabetic, etc. In terms of anti-cancer, there are very few studies on anti-melanoma, so this study focuses on the anti-melanoma effects and underlying mechanisms. Melanoma is a fatal malignant skin cancer with a rapidly increasing incidence around the world. At present, most melanoma patients are treated with surgery, but the recurrence rate is high after surgery, so patients need to consider further adjuvant treatment. This study proved for the first time that compared with normal melanocyte HEM-L, Fucoxanthin has the effect of selectively kill melanoma cell lines A375 and A2058 and inhibit the growth of melanoma colony through apoptosis. In addition, we found that Fucoxanthin can effectively inhibit both constitutive activated of STAT3 (STAT3 (phosphor-Tyrosine 705)) and Interleukin 6 induced STAT3 activation in melanoma. Notably, overexpression of constitutive activated STAT3 (STAT3 (A661C/N663)) was found to significantly antagonize the anti-melanoma effect of Fucoxanthin, confirming that inhibition of STAT3 activation is the main mechanism of Fucoxanthin's anti-melanoma. In addition, we found that Fucoxanthin can also down-regulate the expression of STAT3 downstream genes BCL-2, BCL-xL, MCL-1 and Survivin. Especially, Fucoxanthin cannot inhibit BCL-xL in cells who overexpressing with STAT3. When we overexpression BCL-xL in melanoma, it will blockade the apoptosis induced by Fucoxanthin. Our experiments show that Fucoxanthin can inhibit the activation of STAT3 and affect its downstream BCL-xL expression, and promote the apoptosis of melanoma cells. Finally, we also found that Fucoxanthin can inhibits the protein expression of Janus kinase 2 (JAK2), an upstream kinase in the STAT3 pathway. Altogether, our study confirmed that Fucoxanthin has the property of selectively killing melanoma, and can induce apoptosis of melanoma cells by inhibiting JAK2/STAT3 activation and BCL-xL signaling pathway
A study on marketing strategy of Retailer's omni-channel
No full textWith the change of consumer behavior and the rise of the Internet economy, the omni-channel business model has become the business goal of every retailer. In addition to developing online channels, traditional retailers should also optimize the in-store consumer experience and bring technology into the physical channels, while traditional e-commerce should not ignore the importance of physical channels. To successfully implement the omnichannel business model, retailers must treat consumers as the center of the business and provide a seamless and consistent consumer experience.
This study focuses on the literature and the successful implementation of omnichannel in the case of the two leading supermarkets/supermarkets, Quan Lian and 711, and the leading e-commerce companies, AMAZON and Alibaba, to explore how to successfully implement omnichannel retailing and how to solve the difficulties in the implementation process. Retailers must first identify where they are in the omnichannel process, and set their own omnichannel retailing strategy according to their business objectives.
The key factors for successful implementation of omnichannel are integration of virtual and real channels, optimization of digital marketing, perfect membership system and logistics system, convenient electronic payment, and clear understanding of consumer behavior through technical analysis, allowing retailers to find more efficient ways to implement omnichannel marketing
Phylogeny and color morph variation of the genus Ecsenius
No full textThe genus Ecsenius is the largest genus under the tribe Salariini, Blenniidae. A total of 62 species are currently recognized. They are a group of small (mostly <10 cm total length), scaleless fishes which displays elongate body shape, and diverse color pattern. They distribute in tropical to subtropical region in Indian Ocean and Western Pacific Ocean, some of the species are endemic species in the Red Sea. Different from other blennies occurs in various type of habitat such as sea grass bed, intertidal pool etc., Ecsenius inhibit restricted in coral reef zone with distribution depth of 10 \ue2 39 meters. In previous taxonomic studies, Ecsenius has been classified into 12 species groups based on morphological character, geographical distribution, and color pattern. However, the relationships between species groups remains unknown. In addition, 11 species of Ecsenius were included in phylogenetic studies of Blenniidae (Hundt, 2018). However, most of the intra-species group and inter-species group phylogenetic relationships remains unstudied. The relationships between color variants and genetic divergent is also poorly understood. In this study, I used four nuclear and two mitochondrial genes to reconstruct phylogenetic relationship of Ecsenius to inferring the phylogenetic relationship between species groups and within specie groups. The results showed that phylogenetic relationship within species groups was identical to previous taxonomic assignment, except E. randalli. The results also support Ecsenius composed of four clades, Clade I : Frontalis species group, Plucher species group, Lineatus species group, Mandibularis species group and Yaeyamensis species group. Clade II: Pictus species group, Prooculis species group, Opisifrontalis group, Trillineatus species group and Oculus species group. Clade III: Bicolor species group and Stigmatura species group formed a monophyletic. Clade IV contains only E. randalli. The intra-species group phylogenetic relationships corresponded to their geographical and color pattern. However, meristic treats cannot separate these four clades. Furthermore, possible hybridization was found between two close-related species E. bimacultus and E. shirleyae based on intermediate color morph and the result of phylogenetic relationship. To test the species-level diversity among color morph, the minimum pairwise genetic distance between species based on combined data set of nuclear and mitochondrial loci was used as a threshold to evaluate species boundary. The result found that potential hybridization may occur in E. axelrodi. The pairwise distance between color morphs of E. axelrodi, E. bicolor, E. bandanus, E. lineatus, and E. trilineatus were higher than the species boundary, which indicating those color morphs are potentially new species