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        검색결과 31

        1.
        2024.07 KCI 등재 구독 인증기관·개인회원 무료
        Energy storage is one of the leading problems being faced globally, due to the population explosion in recent times. The conventional energy sources that are available are on the verge of extinction, hence researchers are keen on developing a storage system that will face the upcoming energy needs. Supercapacitors, also known as ultracapacitors or electrochemical capacitors, are advanced energy storage devices characterised by high power density and rapid charge–discharge cycles. Unlike traditional batteries, supercapacitors store energy through electrostatic separation, offering quick energy release and prolonged operational life. They hold exceptional performance in various applications, from portable electronics to electric vehicles, where their ability to deliver bursts of energy efficiently complements or replaces conventional energy storage solutions. Ongoing research focuses on enhancing energy density and overall efficiency, positioning supercapacitors as pivotal components in the evolving landscape of energy storage technologies. A novel electrode material of NiO/CuO/Co3O4/rGO was synthesized which when used as a supercapacitor, the highest value of CS is 873.14 F/g which is achieved for a current density of 1 A/g under with an energy density of 190 Wh/kg and the highest power density of 2.5 kW/kg along with 87.3% retention after 5000 GCD cycles under 1 M KOH.
        2.
        2024.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The untreated effluent dropping into the environment from various textile industries is a major issue. To solve this problem, development of an efficient catalyst for the degradation of macro dye molecules has attracted extensive attention. This work is mainly focused on the synthesis of nickel–manganese sulfide decorated with rGO nanocomposite (Ni–Mn-S/rGO) as an effective visible photocatalyst for degradation of textile toxic macro molecule dye. A simple hydrothermal method was used to synthesize Ni–Mn-S wrapped with rGO. The prepared composites were characterized using various techniques such as X-ray diffraction (XRD), high-resolution scanning electron microscopy (HR-SEM), high-resolution transmission electron microscopy (HR-TEM), Fourier transform infra-red spectrometer (FTIR), and ultra violet–visible (UV–Vis) spectroscopy. The photocatalytic performance of nickel sulfide (NiS), manganese sulfide (MnS), nickel–manganese sulfide (Ni–Mn-S), and Ni–Mn-S/rGO nanocomposite was assessed by analyzing the removal of acid yellow (AY) and rose bengal (RB) dyes under natural sun light. Among these, the Ni–Mn-S/rGO nanocomposite showed the high photocatalytic degradation efficiency of AY and RB dyes (20 ppm concentration) with efficiency at 96.1 and 93.2%, respectively, within 150-min natural sunlight irradiation. The stability of photocatalyst was confirmed by cycle test; it showed stable degradation efficiency even after five cycles. This work confirms that it is an efficient approach for the dye degradation of textile dyes using sulfide-based Ni–Mn-S/rGO nanocomposite.
        4,600원
        4.
        2023.10 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The need for high-performance environmental remediation has increased due to the environment’s ongoing degradation in the form of significant growth in industrialization and urbanization. Therefore, the toxic heavy metals can easily enter into environmental as well as foods and thus the search of clean water for drinking, household and irrigation purposes is of crucial importance. To meet this challenge, microelectrodes are flexible, low-cost and easier for fabrication has become the strong role in the detection of heavy metals with high sensitivity towards higher adsorption of heavy metals from contaminated water. To improve the sensitivity of the microelectrodes, carbon-based microelectrodes decorated with nanomaterials have been explored for the detection of metal ions thereby their presence in trace levels can be estimated. The aim of the present review is to summarize the recent developments in carbon-based microelectrodes for the electrochemical determination of heavy metals. It is followed by the various nanomaterials decorated on the carbon microelectrodes for detection of heavy metals was systematically discussed. Finally, the application and the future perspectives in the development of smart electrochemical sensing is provided. This short review will provide the useful information for the recent development in microelectrodes and also guide the pathway for the detection of heavy metals.
        4,000원
        5.
        2023.05 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Biomass-derived porous carbon is an excellent scientific and technologically interesting material for supercapacitor applications. In this study, we developed biomass-derived nitrogen-doped porous carbon nanosheets (BDPCNS) from cedar cone biomass using a simple KOH activation and pyrolysis method. The BDPCNS was effectively modified at different temperatures of 600 °C, 700 °C, and 800 ℃ under similar conditions. The as-prepared BDPCNS-700 electrode exhibited a high BET surface area of 2883 m2 g− 1 and a total pore volume of 1.26 cm3 g− 1. Additionally, BDPCNS-700 had the highest electrical conductivity (11.03 cm− 1) and highest N-doped content among the different electrode materials. The BDPCNS-700 electrode attained a specific capacitance of 290 F g− 1 at a current density of 1 A g− 1 in a 3 M KOH electrolyte and an excellent longterm electrochemical cycling stability of 93.4% over 1000 cycles. Moreover, the BDPCNS-700 electrode had an excellent energy density (40.27 Wh kg− 1) vs power density (208.19 W kg− 1). These findings indicate that BDPCNS with large surface areas are promising electrode materials for supercapacitors and energy storage systems.
        4,300원
        6.
        2022.12 구독 인증기관 무료, 개인회원 유료
        Underwater heritage is the term commonly used to mean material found underwater. Many states have heightened of underwater heritage remains unprotected. The UNESCO 2001 convention on the protection of the underwater cultural heritage is the foremost international legal reference for the protection or salvage of underwater heritage. To conduct a literature review for this thesis, five keywords were chosen such as UNESCO, under water cultural heritage, marine salvage and sovereignty, exploration, and investigation. The objective is; i) To ensure Malaysia underwater heritage is being well enforced by respective enforcement authorities.; ii) To create an awareness and protection to public and relevant parties.; iii) To identify the relevant implementation of legal enforcement from the respective Malaysia authority) To formulate Malaysia underwater cultural heritage strategic framework for enhancement sustainability development of underwater assets and wealth, and sovereignty. And for the problem statement, i) Lack of proactive measures from operational patrol of underwater cultural heritage for the enforcement from maritime authority,; ii) lack of public disclosure on the importance and existence of underwater heritage in Malaysia by stakeholders,; Iii) Lack of procedures and legal aspects for implementation of underwater cultural heritage in Malaysia water,;iv) None of national underwater cultural heritage strategic framework for sustainability of underwater assets and wealth in Malaysia. Specifically, the component of the underwater heritage is outlined for the protection and conservation of artifacts which have been partially or totally underwater. Qualitative method as main method and data collection from research book, journal article, publish and non-publish report. While expert interviewed via Webex within expert from academician and operational as supportive for this research. Text transcribed has been used for this research and coding system functioned for reference during discussion and findings. This thesis also uses theory of formulation and marine salvage as well as underwater cultural heritage law as a main reference. Finally, underwater cultural heritage strategic framework has been formulated regards to enhancement sustainability development of underwater assets and wealth, and sovereignty. thereby, it shown the Malaysian government commitment and concern to remain national maritime sovereignty.
        5,500원
        7.
        2022.10 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In this work, we report a direct preparation of a few-walled carbon nanotube (FWCNTs) and NiMgAl composites namely FWCNT-NiMgAl by pyrolysis of waste high-density polyethylene (HDPE) plastic at 800 °C with NiMgAl-layered double hydroxide (LDH) as catalysts. The composite formation is carried out in a single step using our lab-developed pyrolysis reactor. The NiMgAl-LDH catalyst was prepared by co-precipitation method and the FWCNTs were grown on the NiMgAl-LDH catalyst with FWCNT yield of 10% and FWCNT-NiMgAl composite yield of 55% whose quality is determined by Raman ID/IG ratio of 2.57. The average outer and inner diameter of the FWCNT are found to be 5.5 nm and 2.9 nm, respectively, from TEM and 2.92 nm from the outer RBM (radial breathing mode) band, which indicates the formation of a few-walled CNTs. FWCNT-NiMgAl is used for the fabrication of flexible supercapacitor electrodes on a polyethylene terephthalate (PET) sheet which achieved a specific capacitance of 432 Fg− 1 in a wide potential range (ΔV = 2) at a scan rate of 5 mV s− 1 in 2 M KOH electrolyte with a high energy density of 240 Wh kg− 1, whereas NiMgAl displayed a capacitance of 200 Fg− 1 with an energy density of 111 Wh kg− 1. The diffusion-type charge storage mechanism (pseudocapacitance) is found to be dominant with contributions of 73.2% and 69.75% for NiMgAl and FWCNT-NiMgAl, respectively. The highest specific capacitance and energy density are obtained for NiMgAl in 2 M KCl and for FWCNT-NiMgAl in 2 M NaOH electrolytes. However, the largest potential window is observed in KOH electrolyte for both NiMgAl and FWCNT-NiMgAl with value of ΔV = 2 V. The electrode material shows good stability in acidic electrolytes and also shows good capacitive stability at high frequencies maintaining a phase angle of 70°. The present work is a novel approach to fabricate low-cost multifunctional carbon composite nanomaterials and will contribute to the research on low-cost waste-derived CNT composite preparation and its application in flexible energy storage devices.
        5,100원
        8.
        2021.10 KCI 등재 구독 인증기관 무료, 개인회원 유료
        This work reveals a modified method for the preparation of activated carbon (P-ACA) using low-cost materials (mix natural asphalt: polypropylene waste). The P-ACA was prepared at 600 °C by assisting KOH and HF. The morphological variations and chemical species of the P-ACA were characterized using SEM–EDX and FTIR. The active surface area, density and ash content of the P-ACA were also investigated. Adsorption properties of P-ACA were used for the thermodynamic and kinetic study of 4-((2-hydroxy naphthalenyl) diazenyl) antipyrine (HNDA), which was prepared as a novel azo dye in this work. The optimal conditions (initial concentration, adsorbent dose, contact time and temperature) of the adsorption process were determined. Adsorption isotherms (Freundlich and Langmuir) were applied to the experimental data. These isothermal constants were used to describe the nature of the adsorption system, and the type of interaction between the dye and the P-ACA surface. The results have indicated that the mixture (Natural asphalt-polypropylene waste) is efficient for the synthesis of P-ACA. The synthesized P-ACA demonstrates the presence of pores on the surface with various diameter ranges (from 1.4 to 4.5 μm). Furthermore, P-ACA exhibits an active surface area of 1230 m2 g−1, and shows a high adsorption capacity for HNDA.
        4,500원
        10.
        2021.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        A simulation based (DFT) study is performed on activated 2D-carbon sheet without and with vacancies of central carbon atoms, and explored the electronic properties. The inter-atomic distance at the center of activated carbon sheet is gradually increased with increasing number of vacancies. We get lower binding energy with three vacancies, and higher without a vacancy. A covalent bond is found between C–C atoms, density of states exhibit a semiconductor nature of a system without vacancy, and metallic nature in the presence of vacancies. There are higher peaks of resultant anti-bonding states with three vacancy system and it exhibits higher amorphous nature which causes higher electron concentration, mobility and higher electrical conductivity.
        4,000원
        11.
        2021.03 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        As an example of research activities in decontamination for decommissioning, new data are presented on the options for corrosion layer dissolution during the decommissioning decontamination, or persulfate regeneration for decontamination solutions re-use. For the management of spent decontamination solutions, new method based on solvent extraction of radionuclides into ionic liquid followed by electrodeposition of the radionuclides has been developed. Fields of applications of composite inorganic-organic absorbers or solid extractants with polyacrylonitrile (PAN) binding matrix for the treatment of liquid radioactive waste are reviewed; a method for americium separation from the boric acid containing NPP evaporator concentrates based on the TODGA-PAN material is discussed in more detail. Performance of a model of radionuclide transport, developed and implemented within the GoldSim programming environment, for the safety studies of the LLW/ILW repository is demonstrated on the specific case of the Richard repository (Czech Republic). Continuation and even broadening of these activities are expected in connection with the approaching end of the lifespan of the first blocks of the Czech NPPs.
        5,400원
        12.
        2020.11 KCI 등재 구독 인증기관 무료, 개인회원 유료
        This paper focuses on critical anti-corruption measures taken by the State of Kuwait and the international community, specifically as they relate to the implementation of the United Nations Convention against Corruption (UNCAC). Specific provisions of Nazaha Law, particularly those related to crimes and persons under its jurisdiction, are compared to the UNCAC, shedding light on the inherent advantages and disadvantages of the Law and whether the law constitutes a sufficient domestic anticorruption measure. By focusing on specific statutes and related jurisdictional matters, significant discrepancies between Nazaha Law and the UNCAC are noted. Kuwaiti legislators should immediately consider these discrepancies to ensure a more effective domestic policy in the global campaign against corruption. This paper comprises five parts including the Introduction and Conclusion. Part two will detail the various types of corruption covered by the Nazaha Law. Part three will focus on the persons covered under Nazaha jurisdiction. Part four will expound the issues of legal jurisdiction.
        7,000원
        13.
        2018.07 구독 인증기관 무료, 개인회원 유료
        This conceptual paper drew on the uses and gratifications theory to theorize about what drives consumers to engage in social media activation campaigns. This paper proposed that satisfying the needs for integration and social interaction, personal identity, information seeking, entertainment, and utilitarian reward through a social media activation campaign can enhance consumers‘ engagement with it. Finally the way in which cognitive, affective, and behavioral engagement with such campaigns affect brand image was explained theoretically. The developed conceptual framework can help marketing managers to create engaging social media activation campaigns, thereby improving the image of their brands.
        4,200원
        14.
        2017.11 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        Self-cleaning and photocatalytic TiO2 thin films were prepared by a facile sol-gel method followed by spin coating using peroxo titanic acid as a precursor. The as-prepared thin films were heated at low temperature(110 °C) and high temperature (400 °C). Thin films were characterized by X-ray diffraction(XRD), Field-emission scanning electron microscopy(FESEM), UVVisible spectroscopy and water contact angle measurement. XRD analysis confirms the low crystallinity of thin films prepared at low temperature, while crystalline anatase phase was found the for high temperature thin film. The photocatalytic activity of thin films was studied by the photocatalytic degradation of methylene blue dye solution. Self-cleaning and photocatalytic performance of both low and high temperature thin films were compared.
        4,000원
        15.
        2016.07 구독 인증기관·개인회원 무료
        Substantial knowledge about how electronic word of mouth (eWOM) relates to influentials, or, individuals who either intentionally or unintentionally have a great impact on the network, is lacking because influence patterns are hardly quantifiable when human and societal components are not deeply understood. The eWOM networks in social media platforms drive the theoretical and practical progress of the social structure of eWOM and the social role of influentials. The purpose of this study is to explore the diffusion of eWOM in a Twitter network by drawing from the Diffusion of Innovation theory in conjunction with Social Network Analysis (SNA) approach. Through a large amount of data collected from Twitter regarding the terrorist attack in Paris on November 13, 2015, this study examined the social structure of eWOM network groups and identifies the social role of influential users in the network of #prayforparis. To identify influentials of eWOM in Twitter networks, SNA was conducted with NodeXL, which is an Excel add-in network analysis software. The Twitter data set was uploaded at 11 am, on November 17, 2015 by applying hashtag prayforparis through Twitter Search Network feature of NodeXL. A total of 19,592 tweets (vertices) were downloaded with a total of 20,297 edges (relations between vertices). “Justin Bieber” was identified as the most influential and dominant user in the network of #prayforparis because he has the highest in-degree (4,196) and highest betweenness centrality (51,772,745.861). Justin Bieber lost one of his friends in the terrorist attack, and his tweet about the sadness from the loss was retweeted more than 50,000 times and received 77,000 likes. Throughout the network, top word pairs respectively repeated more than 4,000 times were “thomas, prayforparis,” “rt, justinebieber,” “rip, thomas,” and “justinbiber, rip.” “Ally Brook” and “Louis Tomlin” ranked 3rd and 5th respectively with the highest betweenness centrality also demonstrated the celebrity power in the eWOM network of #prayforparis. While the three celebrities as dominant influentials were prominent in the Twitter network of #prayforparis, the social roles of fans were also acknowledged. The celebrities’ fans and fan sites have constantly diffused the celebrities’ posts by retweeting and by mentioning every tweet posted by the celebrities that they support. Without the celebrities and their fans, the #prayforparis network would have depicted a completely different style of diffusion of eWOM. The study confirmed social role of fans that constantly presented idiosyncratic manners by identifying and by linking to the public figure. The distinctive characteristics of the fans also enabled identifying the social role of the celebrity while spreading the new ideas with hashtag. The celebrity played a key role as an information hub even in a network of socio-political events such as the #prayforparis Twitter network. Thus, identified overwhelming influence of the celebrities in the eWOM network extends the areas of marketing choices and applicable strategies with celebrities.
        16.
        2016.07 구독 인증기관 무료, 개인회원 유료
        International business ventures are able to survive and succeed in today’s turbulent global market only by developing dynamic capabilities. The dynamic capabilities paradigm proposes for multinationals to integrate, build and reconfigure internal and external competencies as well as tangible (e.g. financial) and intangible (e.g. reputational) resources to face environmental volatility (Teece, Pisano & Shuen, 1997; Morgan, Katsikeas & Vorhies, 2012; Leonidou et al., 2015). However, dynamic capability development needs the organizational “capacity to extract economic benefits from current resources and to develop new capabilities” (Luo, 2000). Here the scholars do not offer a unified view. Capacity for dynamic capability is most often linked to knowledge exploitation / innovation capability (e.g. Monferrer et al., 2015), competitor knowledge utilization (e.g. Luo, 2000), or knowledge- sourcing, generative and integrative capabilities (e.g. Michailova & Zhan, 2015). When speaking about global dynamic capabilities, Lawson and Samson (2001) proposed 7-factor model, Chen and Law (2009) 6-factor model, and Leonidou et al. (2015) 5-factor model. New dynamic capabilities were born, e.g. networking capability (Mitrega et al., 2012), international marketing capability (Morgan, Katsikeas & Vorhies, 2012), etc. In spite of various views, scholars agree that dynamic capabilities generate new forms of competitive advantage (Teece, 2014; Leonidou et al., 2015) and offer strategic value to the firm (Morgan, Katsikeas & Vorhies, 2012). Thus, the advancement of the knowledge in this area will significantly contribute to better performance of export ventures in the future. This study addresses the equivocal results of international (business relationship) marketing and international business scholars and closes the gap between the two domains by proposing a structured framework towards global dynamic capabilities understanding. We build on two dynamic capability models (see Table 1): (1) antecedents-processes-outcomes model proposed by Eriksson (2014); and (2) strategy, structure and environment model proposed by Wilden et al. (2013). First, following Fang and Zou (2009) we believe that the magnitude and complementarity of resources deployed to create dynamic capabilities will differ depending on the antecedents or outcomes phases compared to dynamic capabilities creation process. Second, following Wilden et al. (2013) we claim that dynamic capabilities need to be aligned with organizational structure, environmental (competitive) intensity and multinational firm’s strategy to have a positive effect on export performance. In essence, the objective of this study is to offer an extensive literature review and answer the question, which are the key components of the future global dynamic capabilities model. At the end, this multidisciplinary study offers the directions for future research in the dynamic capabilities area. We suspect future studies will focus on the comparison between developed and emerging markets (Khalid & Larimo, 2012), as the level of turbulence in these markets differs leading to unique conditions for multinationals’ dynamic capabilities development. Furthermore, the comparison between headquarters’ and subsidiaries’ dynamic response to cultural, psychic and economic differences (Leonidou et al., 2015) might reveal other factors that equally importantly impact the export marketing strategy implementation effectiveness (Morgan, Katsikeas & Vorhies, 2012). Finally, we may expect more multidisciplinary studies in the future (Teece, 2014), particularly in the overlapping dynamic fields of (international) management, (business relationship) marketing, and humanistic studies.
        3,000원
        17.
        2016.07 구독 인증기관 무료, 개인회원 유료
        Marketing literature have widely discussed the interplay between marketing capabilities (i.e. company resources and competences in marketing-mix area), market orientation, company innovativeness and company performance (e.g. Knight & Cavusgil, 2004; Luca & Atuahene-Gima, 2007; Moorman & Slotegraaf, 1999; Morgan, Vorhies, & Mason, 2009). However, these studies presented static view of marketing capabilities and resources which becomes less and less relevant in today uncertain market environments (Day, 2011). In this study we follow dynamic capability view (DCV) in management research (Eisenhardt & Martin, 2000; Teece, Pisano, & Shuen, 1997) and we distinguish dynamic marketing capabilities (DMC) from other dynamic capabilities, company resources and competencies (Barrales - Molina, Martínez - López, & Gázquez - Abad, 2014; Morgan, 2012). Specifically, we conceptualize Dynamic Marketing Reconfiguration (DMR) as a DMC grounded explicitly in dynamic capability view and we provide empirical test for a research model, where DMR is hypothesized as factor complementing Market Orientation and influencing on company product innovation success. Corresponding with contingency theory (Donaldson, 2001; Drazin & Van de Ven, 1985), in this study we hypothesize and test the idea that DMR is a company capability that is in a good “fit” with certain organizational and environmental factors. Morgan (2012) and Barrales - Molina, et al. (2014) have proposed dynamic marketing capabilities (DMC) aligned with concepts of “market knowledge” and “marketing resources” and they distinguish DMC from other company capabilities (e.g. manufacturing capabilities, SCM capabilities). Recent marketing literature illustrated empirically that there are actually various DMCs that the focal company may utilize to achieve competitive advantage. For example, Narver, Slater & MacLachlan (2004) focus on Proactive Market Orientation that enable dynamic sensing and satisfying unconscious consumer needs through new product development. Weerawardena, et al. (2015) tested the impact of global dynamic marketing capability and market focused learning on innovation performance and company early internationalization. In this study we focus on specific dynamic marketing capability that complements prior works in this area, namely Dynamic Marketing Reconfiguration (DMR). In line with DCV we conceptualize DMR as company routines oriented at transforming market knowledge into modified and new configurations of marketing resources that are better aligned with market changes. Corresponding with prior studies on static marketing resources and capabilities (Knight & Cavusgil, 2004; Moorman & Slotegraaf, 1999; Morgan, Vorhies, & Mason, 2009), we argue that DMR utilizes such static resources dynamically by systematic enriching and combining them, and,as the consequence, the company equipped with advanced DMR can improve their alignment with the market environment. We do not assume that DMR equals strategy orientating company only at new marketing resources (e.g. utilizing new market knowledge, implementing new advertising instruments, brand repositioning, entering new market segments), but rather at improved configurations of marketing resources (e.g. combing existing resources and marketing experience with new marketing tools in effective way). Our conceptualization of DMR mirrors some real marketing practices that are observable in case of companies operating successfully in regional markets and companies operating on global scale today. The spectacular illustration of DMR is Disney corporation strategy with regard to their new product “Star Wars: the Force Awakens” that was released in December 2015. Disney have implemented very dynamic, innovative and massive approach to promotion of their new product, complementing their traditional advertising tools (e.g. TV advertisement, toys) by modern instruments, such as fan events, new computer games, cartoons and PR in social media (Bart, 2015; Schwartz, 2015). The positive influence of Market Orientation (MO) on company product innovations and company performance was widely discussed in prior studies (Atuahene-Gima, 1996; Han, Kim, & Srivastava, 1998; Hurley & Hult, 1998; Kumar, Jones, Venkatesan, & Leone, 2011). Following Narver, et al. (2004), in this study we treat MO as business’s attempt to understand and to satisfy customers’ needs. Such understanding is useful at every stage of new product development. Additionally, MO does not help the company only through positive impact on product innovativeness, but also through leveraging effectiveness of all marketing resources and instruments, because they are aligned with knowledge about customer needs. Thus, we hypothesize: H1.1: The higher Market Orientation of the company, the stronger success of its product innovations. H1.2: The higher Market Orientation of the company, the better company performance. Dynamic Marketing Reconfiguration (DMR) complements company MO in attempts to improve product innovation success, because understanding and satisfying customer needs present rather static approach to marketing-market alignment. MO is not enough in today volatile markets, when company needs to constantly reconfigure marketing resources to develop and, especially commercialize, new products (Day, 2011; Barrales - Molina, et al. 2014). DMR does not only influence positively on product innovations, but it also directly influences on company performance. Systematically adjusting marketing resources to changes in market environment leverages sales of all company products, not only newly introduced ones. Therefore, we hypothesize: H2.1: The higher Dynamic Marketing Reconfiguration in the company, the stronger success of its product innovations. H2.2: The higher Dynamic Marketing Reconfiguration in the company, the better company performance. This research is focused on product (offering) innovations as the key innovation outcome of a firm’s marketing routines. Product innovation has been established in the management and strategy literature as an important driver of firm performance (e.g. Han et al., 1998). Thus, our hypothesis is:H3: The stronger Product Innovation Success, the better company performance. Companies do not operate in a vacuum, so this study follows contingency theory that postulates finding the “fit” between environmental contingencies and internal configurations within the company (Donaldson, 2001; Van de Ven & Drazin, 1984). So far, only a few studies applying dynamic capabilities perspective have discussed the role of contingencies which creates a research gap for our understanding of DCV (Barreto, 2010). Such research gap is even more visible with regard to our knowledge of dynamic marketing capabilities (DMC), because prior empirical studies in this area have largely ignored contingencies, except environmental uncertainty and firm age (Flatten, et al., 2015). Consequently, in this study we analyse the role of two contingency factors, namely: company size (internal configuration) and industry norms related to product customization (external configuration). Prior studies have presented blurred picture of the role of company size, because dynamic capabilities were also found effective in case of small enterprises (Døving & Gooderham, 2008; Salvato, 2003). Nevertheless, in this study we incorporate original DCV reasoning, because intuitively, in SMEs company routines may be replaced by other factors that are typical advantages of small scale enterprise. On the extreme point, in micro firms (e.g. below 10 employees), there is no need to standardize certain behaviours among employees at all, because all marketing actions, including planning, execution and control are performed usually by one person. Therefore, we hypothesize: H4.1: The Dynamic Marketing Reconfiguration has stronger influence on Product Innovation Success in big and medium companies in comparison to small companies. Contingency theory suggests controlling for the effects from not only organizational features, but also environmental factors (Donaldson, 2001; Van de Ven & Drazin, 1984). We follow Lampel & Mintzberg (1996) suggestion that “…some industries favour customization and some foster standardization…” (p. 21) and we assume that all industries may be distinguished into two main categories: High customization industry vs. Low customization industry. Such distinction is based on perceived dominance of customization vs. standardization practices among competing companies and it may be treated as a proxy to the popularization of relationship marketing strategy (Grönroos, 1994) and service-dominant logic (Vargo & Lusch, 2004) in a given industry. In industries, where high product customization function as a norm, the new product development works through collaborative efforts with customers and value co-creation (Hoyer, Chandy, Dorotic, Krafft, & Singh, 2010). Dynamic marketing capabilities oriented at marketing reconfiguration may be not effective in case of companies working in high customization industries, as close customer relationships popular in such industries demand customer trust and commitment rather than dynamic marketing, including utilizing newest marketing instruments (Mitrega & Katrichis, 2010; Palmatier, Dant, Grewal, & Evans, 2006). In sum, we hypothesize: H4.2: The Dynamic Marketing Reconfiguration has weaker influence on Product Innovation Success, when it is implemented in the industry that favours high product customization. We tested our hypotheses on the cross-sectional survey data based on the sample of 155 companies operating in Poland and we applied structural equation modeling(PLS-SEM) to estimate the hypothesized research model using SmartPLS 3.0 (Hair, Hult, Ringle, & Sarstedt, 2013; Ringle, Wende, & Becker, 2014). As our conceptualization of DMR is grounded in the dynamic capabilities view, we searched for such scales for this construct, which would reflect actions standardized among managers and other people involved in marketing (Eisenhardt & Martin, 2000; Teece, 2007). Thus, for DMR we have adapted selected scales proposed for dynamic capabilities by Pavlou & El Sawy (2011). The market orientation was measured in line with reactive market orientation (Narver, et al. 2004), product innovation success was measured according to Ritter and Gemünden (2003) and company performance according to Reinartz et al. (2004). We applied single item measurement for our contingency factors. Specifically, company size was measured due to number of people employed in the company and industry norms with regard to product customization were measured through question: “Please specify, if your industry demands adjusting company offering to individual requirements of a given customer (e.g. detailed negotiations, product adjustments)”. After purifying measurement model through Exploratory Factor Analysis, we retained 18 items for our 4 latent constructs. The items are available by email upon request. Our measurement model received empirical support for its validity and reliability with regard to literature suggestions, i.e. AVE > 0.5; Cronbach Alpha >0.7; Alpha and Fornell-Larcker discriminant validity criterion (Fornell & Larcker, 1981; Hair et al., 2012). We conducted PLS-SEM analysis following Hair et al. (2013) suggestions. T-statistics were computed by applying a bootstrapping procedure with 5000 bootstrap samples. The detailed results of model estimation are available upon request. Path coefficients for the research model appeared to be all significant except the link between market orientation and company performance, which supports hypotheses H1.1, H2.1; H2.2 and H3, but rejects H1.2. Additionally, contingency effects were tested using Multi-Group Analysis (MGA) implemented in SmartPLS 3.0 (Ringle, et al.2014). The differences in coefficient for path DMR -> PROD. INNOV SUCCESS were found significant in sub-samples according to company size and according to customization industry norms. Specifically, in case of medium and big companies (n = 71) the influence of DMR on product innovation success was significantly stronger (b=0.59) than in case of small companies (n=84; b = 0.28). In case of companies that did not report product customization as industry norm (n=93) the influence of DMR on product innovation success was significantly stronger (b=0.46) than in case of companies that reported industry pressure on product customization (n=62; b=0.27). Thus, all hypotheses connected with contingency effects (H4.1; H4.2) received support. Our study corresponds with recent research devoted to dynamic marketing capabilities (Flatten, et al, 2015; Weerawardena, et al. 2015) and it enriches this research by looking at DMCs from a different angle. Dynamic Marketing Reconfiguration (DMR) that we focus on embraces explicitly these company routines that transform existing marketing resources into their new combinations better aligned with market changes. Thus, DMR is different to proactive market orientation (Narver, at al. 2004) as such PMO is oriented at latent customer needs, but does not assume marketing reconfiguration, e.g. in terms of utilizing new marketing tools. In contrast to Flatten et al. (2015), DMR does not focus only on dynamic pricing capabilities, but it refers to reconfiguration of all marketing resources (i.e. pricing and other marketing-mix elements as well). Our study validates and enriches study by Weerawardena, et al.(2015), where dynamic marketing capabilities were found as the leverage for innovation performance. Similarly to this recent study, our study also confirms positive influence of dynamic marketing capability on innovation performance, but study by Weerawardena et al. (2015) was limited to early internationalizing firms in US and Australia, so we provide different empirical setting for testing this influence (i.e. companies based in Poland in various stages of their internationalization). More importantly, we qualify Weerawardena et al. (2015) by combining insights from dynamic capabilities theory (Teece et al., 1997) and contingency theory (Donaldson, 2001; Van de Ven & Drazin, 1984) and we test previously neglected contingency effects, namely: company size and industry norms with regard to product customization. Our research results suggest that dynamic marketing capabilities, namely DMR, are especially important for bigger companies and for these companies that are not under pressure for strong product customization. It may mean that DMR should be not applied in case of these companies that follow relationship marketing approach (Palmatier, Scheer, Evans, & Arnold, 2008), especially these companies that operate in B2B settings. In general, our study follows recent call for better understanding of dynamic marketing capabilities through more rigorous conceptualizations and providing tests in various empirical settings (Barrales - Molina, et al, 2014).
        4,000원
        18.
        2012.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Porcine has been known to have a great impact on the studies of organ transplantation, biomaterial production and specific biomodel development such as transgenic animals. To achieve such therapeutic purposes, establishment of porcine embryonic stem cells (pESCs) will be needed. Especially, in vitro differentiation toward neural cells from pESCs can be a useful tool for the study of early neural development and neurodegenerative disorders. In addition, these cells can also be used in cell replacement therapies and drug development for neuroprotective and/or neurotoxic reagents. Although several studies reported the successful isolation of pES-like cells, it has been a big challenge to determine optimal conditions to generate pESCs without loss of pluripotency for a long time. The present study was performed for generation and characterization of putative pESCs, and differentiation into neurons and astrocytes. In this study, porcine blastocysts were produced by parthenogenetically activated oocytes. The putative pESCs were cultured in pESC growth media supplemented with a growth factor and cytokines (bFGF, LIF and SCF). Subculture of pESCs was conducted by mechanical dissociation using syringe needles after 4-5 days of incubation. As results, six putative pESC lines were maintained over thirty passages. The putative pESCs were compact, round, flat, and single layered, which were similar to human embryonic stem cell morphologically. Six pES-like cells were positive for alkaline phosphatase activity at every three passages. Furthermore, Oct-3/4, Sox-2, Nanog and SSEA-4 were shown to be expressed in those cells. Also, normal karyotypes of pESCs were observed by Giemsa-staining. Differentiation potential into the three germ layers of the putative pESCs was demonstrated by the formation of embryoid bodies (EB). Besides, the study of ESC is very important in aspect of its application to not only the cell-based replacement therapies but also cellular differentiation research. Our results also showed that RA and N2 supplements activated the neural differentiation in pESC5. Neurofilament-l60 were expressed in neural precursor cells. The expression of markers for specific neural lineages, such as Microtubule-associated protein-2 expressed in matured neuron, was also induced from embryonic neural progenitors. In summary, the pESCs were generated from the parthenogenetically activated blastocysts and the typical characteristics of the cells were maintained for the long term culture. Furthermore, it was successful to differentiate the pESCs into various neural lineages through in vitro neurogenesis system. Eventually, pESCs will be excellent biomedicine in incurable and/or zoonotic diseases by regenerating the damaged tissue.
        4,000원
        20.
        2006.09 구독 인증기관·개인회원 무료
        The present study examines the sintering behaviour and effect of manganese addition both mechanically-blended and mechanically alloyed on Cr-Mo low alloyed steels to enhance the mechanical properties. Mn sublimation during sintering provides some specific phenomena which facilitate the sintering of alloying elements with high oxygen affinity. First step is the optimization of milling time to attain a master alloy with 50% of Mn which is diluted in Fe-1.5Cr-0.2Mo water atomized prealloyed powder by normal mixing. These mixtures are pressed to a green density of 7.1 g/cm3 and sintered at 1120 ºC in 90N2-10H2 atmosphere.
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