• The Journal of the Acoustical Society of Korea
• /
• v.40 no.2
• /
• pp.161-168
• /
• 2021

In this paper, a Silent Speech Interface (SSI) technology was proposed in which Doppler frequency shifts of the reflected signal were used to synthesize the speech signals when 40kHz ultrasonic signal was incident to speaker's mouth region. In SSI, the mapping rules from the features derived from non-speech signals to those from audible speech signals was constructed, the speech signals are synthesized from non-speech signals using the constructed mapping rules. The mapping rules were built by minimizing the overall errors between the estimated and true speech parameters in the conventional SSI methods. In the present study, the mapping rules were constructed so that the distribution of the estimated parameters is similar to that of the true parameters by using Generative Adversarial Networks (GAN). The experimental result using 60 Korean words showed that, both objectively and subjectively, the performance of the proposed method was superior to that of the conventional neural networks-based methods.

• The Journal of the Acoustical Society of Korea
• /
• v.42 no.1
• /
• pp.67-74
• /
• 2023

The images acquired from the speaker's mouth region revealed the unique patterns according to the corresponding voices. By using this principle, the several methods were proposed in which speech signals were recognized or synthesized from the images acquired at the speaker's lower face. In this study, an image-based speech synthesis method was proposed in which the depth images were cooperatively used. Since depth images yielded depth information that cannot be acquired from optical image, it can be used for the purpose of supplementing flat optical images. In this paper, the usefulness of depth images from the perspective of speech synthesis was evaluated. The validation experiment was carried out on 60 Korean isolated words, it was confirmed that the performance in terms of both subjective and objective evaluation was comparable to the optical image-based method. When the two images were used in combination, performance improvements were observed compared with when each image was used alone.

• Journal of Global Scholars of Marketing Science
• /
• v.20 no.2
• /
• pp.219-230
• /
• 2010

Digital content makes big changes to our daily lives while bringing opportunities and challenges for companies. Creative firms integrate pictures, texts, videos, audios, and data by digitalization to develop new products or services and create digital experiences to promote their brands. Most articles on digital content contribute to the basic concept or development of marketing it in literature. Actually, compared with traditional value chains for common products or services, the digital content industry seems to have more potential value. Because quite a bit of digital content is free to the consumer, price is not necessarily perceived as an indicator of the quality or value of information (Rowley 2008). It becomes evident that a current theme in digital content is the issue of "value," and research on customers' perceived value of digital content is a necessity. This article argues that experiential value has an advantage in customers' evaluations of digital content. Two different but related contributions to the understanding of "value" of digital content are made here. First, based on the comparison of digital content with products and services, the article proposes two key characteristics that make experiential strategy available for digital content: intangibility and near-zero reproduction cost. On top of that, based on the discussion of the gap between company's idealized value and customer's perceived value, this article emphasizes that digital content prices and pricing of digital content is different from products and services. As a result of intangibility, prices may not reflect customer value. Moreover, the cost of digital content in the development stage may be very high while reproduction costs shrink dramatically. Moreover, because of the value gap mentioned before, the pricing polices vary for different digital contents. For example, flat price policy is generally used for movies and music (Magiera 2001; Netherby 2002), while for continuous demand, digital content such as online games and anti-virus programs involves a more complicated matter of utility and competitive price levels. Digital content companies have to explore various kinds of strategies to overcome this gap. Rethinking marketing solutions such as advertisements, images, and word-of-mouth and their effect on customers' perceived value becomes essential. China's digital content industry is becoming more and more globalized and drawing special attention from different countries and regions that have respective competitive advantages. The 2008-2009 Annual Report on the Development of China's Digital Content Industry (CCIDConsulting 2009) indicates that, with the driven power of domestic demand and governmental policy support, the country's digital content industry maintained a fast growth of some 30 percent in 2008, obviously indicating the initial stage of industry expansion. In China, anti-virus programs and other software programs which need to be updated use a quarter-based pricing policy. Customers can download a trial version for free and use it for six months or a year. If they want to use it longer, continuous payment is needed. They examine the excellence of the digital content during this trial period and decide whether to pay for continued usage. For China’s music and movie industries, as a result of initial development, experiential strategy has not been much applied, even though firms in other countries find the trial experience and explore important strategies(such as customers listening to music for several seconds for free before downloading it). For the above reasons, anti-virus program may be a representative for digital content industry in China and an exploratory study of the advantage of experiential value in customer's perceived value of digital content is done in the anti-virus market of China. In order to enhance the reliability of the survey data, this study focused on people who were experienced users of anti-virus programs. The empirical results revealed that experiential value has a positive effect on customers' perceived value of digital content. In other words, because digital content is intangible and the reproduction costs are nearly zero, customers' evaluations are based heavily on their experience. Moreover, image and word-of-mouth do not have a positive effect on perceived value, only on experiential value. That is to say, a digital content value chain is different from that of a general product or service. Experiential value has a notable advantage and mediates the effect of image and word-of-mouth on perceived value. The results of this study help provide an understanding of why free digital content downloads exist in developing countries. Customers can perceive the value of digital content only by using and experiencing it. This is also why such governments support the development of digital content. Other developing countries whose digital content business is also in the beginning stage can make use of the suggestions here. Moreover, based on the advantage of experiential strategy, companies should make more of an effort to invest in customers' experience. As a result of the characteristics and value gap of digital content, customers perceive more value in the intangible digital content only by experiencing what they really want. Moreover, because of the near-zero reproduction costs, companies can perhaps use experiential strategy to enhance customer understanding of digital content.

• Journal of Oral Medicine and Pain
• /
• v.26 no.2
• /
• pp.133-146
• /
• 2001

This study was performed to predict the conservative treatment outcome of TMD patients by investigating the prognostic factors ; symptom duration, history of previous treatment, history of previous medication, history of trauma, disability of daily activity, severity of pain, noise, limitation of mouth opening(LOM) and maximum comfortable opening(MCO). Two hundreds and fifty-four subjects were selected for this study among the TMD patients who had visited the Dept. of Oral Medicine BNUH and been treated conservatively with medication, physical therapy, behavioral treatment, and splint therapy from 1991 to 2000. The subjects were divided into two groups improved or unimproved according to the treatment response following six months of conservative treatment. Those who showed less than 1 on NAS for pain, TMJ noise, and opening limitation belonged to the improved group and those who showed more than 2 on NAS belonged to the unimproved group. The two groups were compared with respect to symptom severity, number of diagnosis, history of trauma, previous treatment, previous medication, and disability of daily activity. A prognostic equation with the factors revealed to be significantly related to the prognosis of conservative treatment was obtained. The obtained results were as follows ; 1. In improved group, mean duration of history was 12 months, mean treatment duration of a patient was 4 months an mean number of treatment was about 10 times. In other words, in unimproved group, mean duration of history was 27.4 months, mean treatment duration of patient was 10.5 months and mean number of treatment was 19 times. 2. In unimproved group, multiple diagnosis, chronicity, disability of daily activity were significantly greater than that of the improved group. 3. Patients in unimproved group revealed severe noise at first visit and smaller maximum comfortable opening comparatively. 4. Prognostic factors such as duration of treatment, number of treatment, multiplicity, and chronicity and disability of daily activity showed a significant relation in prediction of improvement. 5. Prognostic equation with significant variables is as follows ; Y = 1.984 - 0.251Noise + 0.068MCO - 0.673Multiplicity. - 0.958Chronicity - 0.065Disability. Classification accuracy of 70.3 %, sensitivity of 71.4% and specificity of 66.7% were shown. 6. Prognostic equation with all factors is as follows : Y = 1.599 - 0.038Pain - 0.256Noise - 0.006Limitation + 0.068MCO - 0.580Multiplicity - 1.025Chronicity - 0.720Disability - 0.329Medication - 0.087Treatment + 0.740Trauma. Classification accuracy of 70.3 %, sensitivity of 73% and specificity of 64.3% were shown. 7. Prognostic value of the improved group with significant factors was $1.0446{\pm}1.0726$ and prognostic value of the unimproved group with significant factors was $-0.013{\pm}1.0146$. Prognostic value of the improved group with all factors was $1.0465{\pm}1.0849$ and prognostic value of the unimproved group with all factors was $-0.057{\pm}1.0611$.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.33 no.1
• /
• pp.139-145
• /
• 2006

Ranula is a mucocele which occurs at the mouth floor and is mostly related to sublingual gland. In other words ranula is definded as a pseudocyst which occurs as the secretion duct of sublingual gland is destructed there as the saliva from the secretion duct flows out and retention in the soft tissue. The cause of ranula is destruction or obstruction of the duct. The clinical findings of ranula is a painless, unilateral bluish transparent swelling around the frenum and shows fluctuation when palpated. Histological finding represent a formation of cavity inside the connective tissue, but a pseudo-cyst can be seen which the wall of the cyst is composed of granulation tissue rather than epithelial cells. The first treatment of ranula can be considered as marsupialization. which induces the inner wall of the Ranula to be a part of oral mucosa. This case report shows a treatment of marsupialization with gauze packing in a young patient representing a clinical finding of characteristic ranula.

• Journal of Korean Medical classics
• /
• v.24 no.6
• /
• pp.101-110
• /
• 2011

There are not a few cases in Oriental medicine where a different prescription should be given to some of the patients whose symptoms are similar to each other. In other words, there might happen a misdiagnosis due to an extremely delicate difference in symptoms of the same diseases, causing a patient's condition to get worse or to be even on the brink of death. In such a context, the records in "WooJam JabJeo(愚岑雜著)" are worthwhile to do in-depth research on. Jang-Taegyung described his first-hand experience in major medical treatment very vivaciously during his ages between 25 and 42. Particularly, most of the prescriptions recorded in this book include not only his empirical prescriptions on the patients who life was almost on the brink of death but it also so plentifully contained the process of overcoming the side effect caused by other clinics' misdiagnosis; thus, that this book is drawing attention in that it could be indispensable materials not only in the research on medical history but also for clinical treatment. Particularly, as regards two cases of insanity, this book mentions the reason for using totally different prescription on one case from the other case even though the two cases had a similar symptom, through which we can acquire somewhat concrete experience in curing scenes though indirectly during the period of the Joseon Dynasty. We were able to get the result from the analysis of the two cases of insanity as follows: 1. WooJam, in treating the two cases of insanity due to the severe exacerbation of yang energy, managed to treat the one case by inducing a bowel movement and the other case by inducing urination. Such a different treatment seems to be greatly attributable to the constitutional factor of the two patients. Such an Oriental-medicine-based method of diagnosis and prescription as WooJam's is rarely found in Western medicine-i.e., that's why more thorough research on Oriental medicine is deeply required. 2. In case of the second patient, the patient arrived at insanity due to another clinic's treatment on perspiration on the patient with severe mouth thirst. This medical story once again highlights the importance of a diagnosis in today's Oriental medicine and at the same time it's a good example showing how big the side effect caused by the abuse of medicinal herbs is. The second patient's body fluids ran dry and finally his yang energy got exacerbated all the more due to the treatment by perspiration.

• Journal of the Korean Society of School Health
• /
• v.13 no.2
• /
• pp.319-329
• /
• 2000

This study suggestes that the improvement of oral care through on investigation of the effects of oral care on children by parents. This investigation was done on Sep. 29 1999 through Oct. 8 examining 376 of elementary, 1grade, 2grade, 3grade students in Kyunggi-Do. The content of the questions was analzed with a t-test and a one-way ANOVA; the relation to the oral care on children by parents with oral care behavior was analyzed by a Pearson's Correlation Coefficient. The results are as follow; 1) Statistically women were higher(F=-2.675, p<0.01). The average of the oral care of children was 2.34, man averaged 2.29, woman are raged 2.32. Statistically women were also higher(F=4.682, p<0.052). 2) The more educatior the mother had higher, the higher the grade. Statistically there was a difference(F=6.756, p<0.01. The oral care of children above Uni graduate(M=2.38), high (M=2:23), middle graduate(M=2.Z3). Statistically, the higher the academic degree, the more optimistic(F=4.114, p<0.05). 3) In the oral care on children by parents, when the conversation with the family was often 2.17, there was little difference(F=7.343, p<0.01). In the oral care of children was 2.45, there was little difference(F=7.343. p<0.01). As a result, the conversation with family affects the behavior. 4) In the oral care of children, if the food that they like was fruits, vegetables, and fresh food, the average was 2.37, very high. There was little difference in other cases(F=-3.179, p<0.05). We can conclude that fresh food affects the oral care of children. 5) In the oral care on children by parents, when the course of knowledge on the oral care was viewed by a grandfather(M=2.02), grandmother(M=2.05), father(M=2.14), mother(M=2.08). There was little difference(F=2.666, p<0.05). 6) In oral care, if the level of income was viewed high level(M=2.42), middle(M=2.34), 10w(M=1.88), there was a little difference(F=3.300, p<0.05). 7) The relation of the oral care on children by parents and the oral care was normal. In other words, the more management by parents, the more management by children.(p<0.01) Therefore in this study, the oral care on children by parents effect the oral care behavior of children. To improve the mouth health of children, the parents's interest in their children must be constant. Also, it is needed to develope an education program where parents and children can be educated.

• Journal of the Korea Convergence Society
• /
• v.11 no.6
• /
• pp.237-248
• /
• 2020

The purpose of this study is to measure the agricultural product market efficiency of the three e-commerce platforms from the perspective of consumer price fairness perception, analyze the quality and price gap of invalid brands, and help agricultural products enterprises to formulate reasonable price strategies. The characteristics of farm products sold in e-commerce platforms(quality, origin, taste, safety level) were selected as output indicators and the prices of products were selected as input indicators to evaluate the efficiency of the market through DEA analysis. According to the analysis, JD mall has the largest proportion of effective brands, while YHD.com has the highest average market efficiency, and northeast rice has the largest difference in average efficiency among the three platforms. The results show that price inefficiencies still exist in the electronic market. The development of online market for agricultural products should pay attention to consumer price fairness and pay attention to the coordination between price and quality. The limitation of this paper is that it does not focus on the influence of words of mouth marketing in internet market and consumer experience, which can be the future research direction.

• The Korean Journal of Archival Studies
• /
• no.68
• /
• pp.205-241
• /
• 2021

This article explores how to incorporate the topic of the global environmental crisis called the "anthropocene" into archives studies and connect it to ecological practical reasons. In order to encourage discussion of archival studies, which puts the environmental crisis at a kind of archive constant value, this study seeks to examine the possibility of a quality shift in archival studies based on ecology. This article aims to go beyond the pragmatism of preparing improvements to eco-friendly record management, which is recently claimed by the "Green Archive" in Western archival studies. It calls for a new concept called 'ecological archive', which theoretically combines a more archives-based and ecological paradigm, and its epistemological transformation. Specifically, the ecological approach of archives is first discovered in the discussion of archival studies and at the same time, through the "ecological turn" of archives emphasized by recent anthropocene discourses, the concept of "ecological archive" emphasized by this article is embodied. This study uses 'ecological archive' as a universal and theoretical framework for archives as a basic concept for building ecological 'living' archives. In other words, for the construction of ecological archives, we reinterpret and extend so-called democratic values for archives, i.e., post-custodianship, community archives, and archives of emotions. Finally, the records of foot-and-mouth disease killing burial sites, an important site and example of the anthropocene tragedy, exemplifies the methodology of the actual application of ecological living archives. The case analysis aims to seek a new qualitative shift in record management that adapts to global ecological transformation, while also emphasizing the documentation by archival activism in ecological field practices jointly organized by archivists and citizens.

• Management & Information Systems Review
• /
• v.29 no.1
• /
• pp.117-144
• /
• 2010

This paper planned to review positively the influence of leading variables - Functional benefits, Emotional benefits, Self-expressive benefits over Consumer-brand relationship, and the structural relationship between Consumer-brand relationship and Brand attachment, Word-of-mouse. For it, we verified our hypothesis utilizing Hierarchial chi-square analysis that was available to statistically verify the size between 2 paths out of Structural models As the result of research, Emotional benefits was more influential than Functional benefits in the formation of Consumer-brand relationship. Additionally, the influential difference between Emotional benefits and Self-expressive benefits was not found in the formation of Consumer-brand relationship. In other words, both Emotional benefits and Functional benefits were proved to have a positive influence on forming Consumer-brand relationship. On the other hand, Self expressive benefits played a more influential role than Functional benefit in the formation of Consumer-brand relationship. The fact was also proved that the higher the formation level of Consumer -brand relationship was, the greater positive influence over Brand attachment and Word-of-mouse Through the above results, it is more desirable to establish brand strategy for forming Consumer-brand relationship through Emotional benefits and Self expressive benefits rather than Functional benefits. Additionally, the Consumer-brand relationship formed by Value benefit is expected not only to get the level of attachment, showing like love, toward the brand deeper, but also to achieve the effect of positive, long term communication through voluntary Word-of-mouse.