• Journal of Korea Technology Innovation Society
• /
• v.15 no.3
• /
• pp.500-532
• /
• 2012

This study analyzed the technology innovation strategies of knowledge-based companies in the semiconductor IP industry. The theoretical approaches of this study are to i) the creation, protection and utilization of knowledge and innovation, ii) value creation from innovation, iii) modularity, timing of market entry, and the emergence and competition of standard (dominant design). Based on the theoretical analysis, I presented exploratory research hypotheses. Ultimately, this study examined the proposed hypotheses by conducting case studies on the technology innovation strategy of two leading knowledge-based companies in the semiconductor IP industry: ARM and INTEL. First, knowledge-based companies entering in the early stage of the technology cycle select the vertically-integrated technology strategy because of lower access to complementary knowledge assets, and maintain the vertically-integrated technology strategy despite the environmental change-driven differentiation of industry's value chain. Second, knowledge-based companies entering in the later stage of the technology cycle prefer the contract-based technology strategy because of its increased accessibility to complementary knowledge assets, and choose a different path of innovation strategies depending on whether their asset has the feature of discontinuity or not.

• Journal of Digital Convergence
• /
• v.16 no.4
• /
• pp.39-47
• /
• 2018

This paper aim to propose and suggest for government to reinvent and re-steering the policy on the 4th industrial revolution in Korea. To do it, this paper annalize the advanced country's policies and hard-data sets from many international research institutes. So this paper emphasized the concept and frame of socio-technical system approach by Geels. According to this approach, this paper can get a conclusion that Korea government has to focus on the roles to solve the big social dilemma with high-tech tools from the 4th industrial revolution. And this paper point out the necessary of increasing the diversity and multidisciplinary in 4th industrial revolution policy of Korean government. These findings of this paper recommend for Korea to redesigns the governance mechanism and legislation platform and to design the future readiness.

• Applied Microscopy
• /
• v.40 no.4
• /
• pp.237-244
• /
• 2010

Utricularia forms small, but complex carnivorous trap along the stem either in water or in soil depending upon species. The shapes and sizes of the traps, appendages, and trichomes are known to differ among aquatic, terrestrial and epiphytic species. In the present study, the morphology and microstructure of the trap in aquatic Utricularia japonica and terrestrial U. livida were examined using light and electron microscopy. The aim of this study was to compare the characteristics of trap features between the aquatic and terrestrial species. The trap was found to be comprised of a thin walled bladder with numerous capitate trichomes, two-armed bifid and four-armed quadrifid glands in both species; however, the traps of the two species were different in size, and number and morphology of the trichomes and glands. Aquatic Utricularia was chlorenchymatous with chloroplasts distributed throughout the body, whereas the terrestrial species was translucent without plastids due to an adaptation to underground habitats. Furthermore, the former differed considerably in that the traps developed antenna and appendages around the entrance area. A peculiar trap entrance was also noted in U. livida, which exhibited radiating rows of various trichomes within funnel-shaped tissue. A large number of glandular trichomes covered the entrance area and door surface with four trigger hairs each in the aquatic form but only two in the terrestrial form. The glandular trichomes near the door secreted a large amount of mucilage that temporarily composed the velum in the U. japonica, however, it was not observed in the terrestrial species. All of the aforementioned features were highly related in their structure and function during carnivorous mechanism in Utricularia. The current findings provide important data for further comparison of the different life forms within Utricularia.

• The korean journal of orthodontics
• /
• v.30 no.6 s.83
• /
• pp.739-745
• /
• 2000

Ectodermal dysplasia is a hereditary disease characterized by a congenital dysplasia of one or mote ectodermal structures. Characteristic manifestations Include scanty hair and eyebrows, pigmented and hyperkeratinized skin around the eyes and mouth, frontal bossing with prominent supraorbital ridges, nasal bridge depression and dental anomalies. Hyperthermia or unexplained high fever as a result of the deficiency of sweat glands is common medical history. Findings of intraoral structures are anodontia or oligodontia with conical crowns. Consequently, generalized spacing and loss of vertical dimension of occlusion. Interdisciplinary approach has been performed to treat a 10-year old boy with ectodermal dysplasia. Orthodontists and a prosthodontist worked together on this case, and the result was satisfactory.

• Korean Journal of Environment and Ecology
• /
• v.11 no.2
• /
• pp.240-248
• /
• 1997

기존 연구 문헌의 고찰로 서울시 야생조류상의 현황 및 관리방안은 다음과 같이 결론지을 수 있다. 1. 서울시 야생조류상에 대하여 물새와 산새를 모두 연구한 결과가 아직 발표되지 않아 정확한 현황은 파악하기 어려우나 번식기에는 약 40 여종, 겨울철에는 40여종이 서식하는 것으로 볼 수 있으나, 앞으로 정교하며 지속적인 모니터링이 필요하다. 2. 도시림 뿐만 아니라 주변의 패치를 동시에 고려한 통합적 접근방식(intergrated approach)으로 도시림을 연구하여 관리해야 할 것이다. 3. 도시림의 면적은 도시림에 번식하는 야생조류의 종 수에 큰 영향을 미치는 지배적인 인자로써 도시림이 더 이상 다른 토지이용 형태로 전환되지 않도록 관리하는 것이 가장 기초적인 관리 지침이다. 4. 대면적의 숲이 세분화 될 경우, 여름철새의 번식에 지장이 있을 수 있으므로 대면적 숲의 세분화를 막아야 하며, 가능한 한 생태통로(eco-corridor)로 세분화 된 숲을 연결할 수 있는 기술을 개발해야 할 것이다. 5. 도시림에 생육하는 임목 중 대경급 임목은 나무구멍을 둥지자원으로 이용하는 조류의 중요한 은신처와 둥지이므로 대경급 임목을 대신할 수 있는 인공새집의 설치는 나무구멍을 둥지로 이용하는 조류의 번식 종 수를 높이는 방법이다. 또한, 도시림이 시민에 의해 과도하게 이용될 경우, 관목층이 제거되어 관목층을 둥지자원으로 이용하는 조류의 서식에 불리한 조건을 제공할 수 있으므로 등산로 주변에 관목성 수목을 밀식하여 등산로의 확폭과 파괴를 막아야 할 것이다. 풍부한 먹이 자원을 제공하기 위하여 관목층 보호를 꾀하고 임목의 조림과 무육에 힘써야 할 것이다. 6. 동일한 면적에서 번식 조류 종 수를 높이는 방법은 엽층의 피도량을 늘이는 것이다. 현재 서울의 도시림은 엽층의 분화보다는 우선, 피도량의 증가를 위해 노력해야 하며 후에 엽층의 다양성을 높여 산림의 수직적 구조를 다양하게 만들어야 할 것이다. 7. 들고양이와 들개에 의한 소형 조류의 피해가 늘고 있으므로, 야생조류의 천적인 들고양이와 들개를 구제해야 할 것이며, 이에 앞서 서식실태가 조사되어야 할 것이다. 8. 한각을 비롯한 지천의 하변에 서식, 월동하는 물새류와 서식지에 대한 연구와 관리가 시급히 이루어져야 할 것이다. 9. 산불방지와 도시림 정비의 일환으로 실시해 온 관목층과 낙엽 및 죽은 가지를 제거하는 비과학적인 관행과, 하천유지유량을 높이고 하변 정비 및 산불 방지으 ㅣ한 방편으로 진행된 하변 식생 제거는 전문가와 충분히 제고한 후, 없어져야 할 것이다.

• Journal of Navigation and Port Research
• /
• v.35 no.3
• /
• pp.271-279
• /
• 2011

This study aims at searching the global strategy which can raise the competitive power of IEC(International Express Companies) in Korea analyzing and coping with the international express companies and global factor of promotion. The global strategy varialbe for IEC- invigorating in korea is composed with nine variables which is M&A strategy, Intergrated logistics enterprise strategy, Globalized alliance strategy, SCM stratege, the third party operating strategy, Total logistic operating system strategy, Differentiated service providing strategy, Phased market entry strategy, Core capability strengthen strategy. According to the result of study, the global strategy influence for the nature of international express company's and increasing competitiveness is depend on specialization strategy and using scale of economy for globalization strategy.

• The Journal of the Korean dental association
• /
• v.48 no.2
• /
• pp.106-112
• /
• 2010

Tissue engineering has been enhanced by advance in biomaterial nature, surface structure and design. In this paper, I report specifically vertically aligned titania ($TiO_2$) nanotube surface structuring for optimization of titanium implants utilizing nanotechnology. The formation, mechanism, characteristics of titania nanotubes are explained and emerging critical role in tissue engineering and regenerative medicine is reviewed. The main focus of this paper is on the unique 3 dimensional tubular shaped nanostructure of titania and its effects on creating epochal impacts on cell behavior. Particularly, I discuss how different cells cultured on titania nanotube are adhered, proliferated, differentiated and showed phenotypic functionality compared to those cultured on flat titanium. As a matter of fact, the presence of titania nanotube surface structuring on titanium for dental applications had an important effect improving the proliferation and mineralization of osteoblasts in vitro, and enhancing the bone bonding strength with rabbit tibia over conventional titanium implants in vivo. The nano-features of titania nanotubular structure are expected to be advantageous in regulating many positive cell and tissue responses for various tissue engineering and regenerative medicine applications.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.30 no.11 s.158
• /
• pp.1495-1506
• /
• 2006

The purposes of this study are to investigate the formation and the change of apparel retail structure historically with the viewpoint that the retail structure is affected by the process of economic development. This study was done by literature research method and the result of this study is the following. The tailor and seamstress shops, the first clothing shops in Korea, were replaced by ready-made shops, because mass production system which had developed with the industrialization of Korea increased the advantage of economy of scale compared to handicrafts individual one. After that, the production system of apparel industry had been efficient continuously, while retail system had not. The retailing of famous brand apparel conducted by exclusive franchise store caused supplier oriented markets where the opinion and the desire of consumers were not reflected. While the retailing of the unknown brand apparel handled by small retail stores were inefficient. As the apparel industry matured in 1990s, various types of new stores appeared such as specialty stores, discount stores, TV home shopping, internet shopping, outlet malls, and big fashion stores in Dongdeamoon. These new stores have features of seeking profits in mass merchandising. As these large retail stores grow, the apparel retail structure of Korea is changing from a fragmented market to a vertically integrated one. This change is shown by the decrease of stores per inhabitants. With the change of environment, the apparel retail system which has lagged behind comparatively is expected to develop into more efficient system based on the large capital investment which raise the advantage of economy of scale.

• Journal of the Korean earth science society
• /
• v.37 no.6
• /
• pp.332-345
• /
• 2016

The columnar joints in Goheung are developed in three places of Yuju-san area, Palyeong-san and Yongbawi area. Vertical and fan-shaped columnar joints which have maximum width 100 m and maximum heigh 50 m are developed in the Yuju-san area Columnar joints are developed next to the road near the the Yuju-san and along the coast of Jijuk-do. Thick columnar joints of maximum width 1m are developed in the Paryeong-san area. Horizontal columnar joints of maximum width 50 cm at length of polygon side are developed on dyke in the Yongbawi area. The columnar joints show high rate of rectangles and pentagons in the number of polygons. The length of polygon side of columnar joints in study area ranges from 10 to 100 cm, and 20 cm among the range appears in high frequency. Columnar joints are developed vertically to the ground from the cooling surface in Yuju-san and Palyeong-san area. Columnar joints in Yongbawi area are developed vertically to the contact of country rocks. As a result, the columnar joints began cooling from the country rock contact. And columnar joints are developed vertically to contact surface. The rocks in columnar joints is rhyolitic welded tuff in Yuju-san and Palyeong-san area, dacite in Yongbawi area. In the acid volcanic rocks flow structure well developed. The white phenocryst mineral about 2 mm size by eye, is usually feldspar, and includes some quartz. The rate of $SiO_2$ is 70wt.% or more. It is the last stage of differentiation to calc-alkaline series. The columnar joints of the Yuju-san area are expected to be distributed along a band that extends to about 1km east of the stone pit.

• Applied Microscopy
• /
• v.31 no.4
• /
• pp.355-365
• /
• 2001

This study was performed to investigate the distribution and differentiation on the immunoreacted cells of the ChAT (choline acetyltransferase) at the Meynert basal nucleus of the forebrains in the growth periods of rat, using the immunohistochemistric method. According to the cell shape and the ratio of long axis vs short axis of cell soma, the ChAT antibody reacted nerve cells in the Meynert basal nucleus of the rats were classified into six types. In the adult rats, the FD (frequency distributions) of round, oval and elongated cells were maximum. The FD of these types were shown to be progressively decreased during the postnatal development. In addition, the FD of elongated nerve cells in were observed in the adult rats respectively. This was thought to be the same phenomenon as those in the round and oval cells . The total mean volume of ChAT antibody reacted cell somata was lowest in the PND (postnatal days) 7 rats and was highest in the PND 21 rats. But, those were decreased to the adult. These results suggest that ChAT antibody reacted nerve cells grow up to PND 21 and then, differentiate into the various types by neurites outgrowing. On the electron micrography, the adult rat forebrain cells were obtained to be well developed ribosomes, polysomes , rough endoplasmic reticula and mitochondria. The immunreactivities were observed in ribosomes, polysomes, rough endoplasmic reticula and outer membrane of mitochondria. Golgi complexes were poorly developed and not showed jmmunreactivity. The ribosomes , polysomes and endoplasmic reticula are considered to be closely related to the inter cellular localization and biosynthesis of the ChAT but not Golgi complex. According to the results in the present study, it is considered that the ChAT-immunoreacted nerve cells in the Meynert basal nucleus of the rat forebrains are differentiated throughout the postnatal development with following processes of changes; 1) the cholinergic nerve cells develop postnatally 2) cell soma volumes gradually increase during the early postnatal days 3) and then, cells differentiate into the various types by projecting the neurites to the appropriate area after PND 21.