• 말소리와 음성과학
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• 제15권4호
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• pp.45-51
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• 2023

나이가 들면서 발생하는 음성 문제는 사회적, 정서적으로 영향을 미칠 수 있으며, 나아가 고립감과 우울증으로 이어질 수 있다. 이에 본 연구에서는 노화로 인한 음향학적 특성 변화를 음질과 구어 유창성의 변화를 알아보고자 한다. 이를 위해 노년층 남성 20명과 청년층 남성 20명이 산출한 연장발성과 구절 읽기 과제를 녹음하여 분석하였다. 음질 분석 변수로 기본주파수(F0), 주기 변동률(jitter), 진폭 변동률(shimmer), 켑스트럼 정점(cepstral peak prominence, CPP) 값을 분석하였으며 구어 유창성 분석 변수로는 평균 음절 길이(average syllable duration, ASD), 조음 속도(articulation rate, AR), 구어 속도(SR)를 분석하였다. 연구결과, 음질 측정에서 노년층의 경우 F0가 높게 나타났으며 jitter, shimmer, CPP의 결과값을 통해 음질이 저하된 것으로 나타났다. 구어 유창성 분석 결과, 노년층은 ASD, AR, SR의 결과값을 통해 느리게 발화하는 것으로 나타났다. 음질과 구어유창성 간 상관관계 분석 결과, shimmer와 CPP 값과 각각 ASD와 SR에서 높은 상관관계가 나타났다. 본 연구결과를 통해 노화에 따른 음성과 구어 유창성 변화를 조기에 발견하고 이에 대한 적절한 훈련법을 제공할 수 있을 것으로 기대된다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권10호
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• pp.3627-3641
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• 2021

Fintech, which stands for financial technology, is growing fast globally since the economic crisis hit the United States in 2008. Fintech companies are striving to secure a competitive advantage over existing financial services by providing efficient financial services utilizing the latest technologies. Fintech companies can be classified into several areas according to their business solutions. Among the Fintech sector, peer-to-peer (P2P) lending companies are leading the domestic Fintech industry. P2P lending is a method of lending funds directly to individuals or businesses without an official financial institution participating as an intermediary in the transaction. The rapid growth of P2P lending companies has now reached a level that threatens secondary financial markets. However, as the growth rate increases, so does the potential risk factor. In addition to government laws to protect and regulate P2P lending, further measures to reduce the risk of P2P lending accidents have yet to keep up with the pace of market growth. Since most P2P lenders do not implement their own credit rating system, they rely on personal credit scores provided by credit rating agencies such as the NICE credit information service in Korea. However, it is hard for P2P lending companies to figure out the intentional loan default of the borrower since most borrowers' credit scores are not excellent. This study analyzed the voices of telephone conversation between the loan consultant and the borrower in order to verify if it is applicable to determine the personal credit score. Experimental results show that the change in pitch frequency and change in voice pitch frequency can be reliably identified, and this difference can be used to predict the loan defaults or use it to determine the underlying default risk. It has also been shown that parameters extracted from sample voice data can be used as a determinant for classifying the level of personal credit ratings.

• Asia Marketing Journal
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• 제11권3호
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• pp.167-184
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• 2009

세계 항공시장의 경쟁이 점점 치열해지는 가운데 대한항공은 비용절감을 통해 운영의 효율화를 이루는 한편, 서비스 차별화를 통해 고객 충성도를 강화하고자 노력해 왔다. 최근 고객 충성도를 보다 강화하기 위해 대한항공은 적극적인 문화마케팅 활동을 통해 프리미엄 기업이미지를 제고하고 있다. 대한항공은 세계 3대 박물관과 장기간의 제휴를 맺고, 프랑스 루브르 박물관을 필두로 하여 박물관의 새로운 작품안내 서비스를 후원하고 있다. 뿐만 아니라 이들 박물관에 한국어 안내 서비스가 도입될 수 있도록 후원하여 국가적 위상과 국민의 자긍심을 제고시켰다. 본 사례에서는 단순히 물자와 사람을 수송하는 항공사를 넘어 세계의 도시와 문화·예술을 연결하는 Global Leading Carrier로서 그 역할을 확대해 가고 있는 대한항공의 문화마케팅 도입배경과 구체적인 활동 및 전략을 소개하고, 그 성과 및 특징을 논의하고자 한다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.2775-2781
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• 2011

Urban Transit Train Radio is Radio Communication system that is used official business as leading motive for train safety running among the train crew and the central control center and drive-caring-chamber on main line and branch line. This system is operated that organizes talking path on handset of terminal after the train crew receives audio and understands call voice on speaker of terminal at calling the train of the central control center. When the central control center calls the specific train uses all call radio form, the train crew doesn't recognize the call cause the train situation, noise and action as train control. So there is a delay response cause reset call at the central control center. This research discusses the management of subway radio system and describes the call the train system that recognize train call number of all-call used between the central control center and the train crew.

• 한국산업안전학회:학술대회논문집
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• 한국안전학회 2003년도 추계 학술논문발표회 논문집
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• pp.3-16
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• 2003

After a not-widely-known fact is revealed that Japan is a leading country in production and use of industrial unmanned helicopters, a kind of UAV. The voice command system and the autonomous flight control system with a variety of control algorithms including neural network, robust and adaptive control that have been developed in collaboration between Kyoto University and Yamaha Motor Co., and funded by the Ministry of Education and Science of Japan are described in some detail. Both already-proven and promising future applications of the autonomous unmanned helicopters are given.

• Journal of Communications and Networks
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• 제8권2호
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• pp.182-186
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• 2006

Previous approaches to sizing the carrier spacing for voice-oriented cellular systems have been based on the outage requirement. However, such a design paradigm needs to be changed as the performance of most upcoming cellular systems employing adaptive modulation and coding (AMC) techniques is more sensitive to throughput than outage. In this paper, we propose a novel approach to determining the carrier spacing which is based on a throughput criterion. The proposed method reflects well the characteristics of throughput-sensitive cellular systems that transport multimedia traffic. Numerical results show that our approach requires less carrier spacing, thus leading to more efficient spectrum utilization.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.273-274
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• 2008

According to current RRC procedures, network does not know either how long it will take the RRC reconfiguration message (such as Physical Channel Reconfiguration (PCR)/Transport Channel Reconfiguration (TCR)/Radio Bearer Reconfiguration (RBR)) to be transmitted over the source cell or how long the UE will take to reconfigure on receiving the message, it has to assume the worst-case. Thus, it typically indicates a conservative activation time, leading to potentially large interruption for voice traffic, particularly if the source cell signal strength has degraded. This proposals allow the UE to receive the serving cell related information (carried today in PCR/RBR/TCR message) in an Active Set Update message.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.1294-1302
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• 2008

Talk-Back systems comprised of master-equipment at the control room and slave-equipment at turnouts refer to the intercommunication facilities that optimize mutual communication between maintenance staff on trackside and the control room to facilitate quickness and accuracy of train operation control and its maintenance within depot and on mainlines with turnouts for direction switching of the trains in operation. The weakness lies in additional maintenance costs of cables since the Talk-Back system installed on line 1 along with line 2-4 has a profound effect on the voice quality leading to the attenuation and crosstalk of the system due to the deterioration of cables and environmental factors. This paper discusses the Talk-Back system in a radio communication environment with the application of RF(Radio Frequency) communication system from the wire communication system by cables to ameliorate these problems, and deals with the energy saving environmentally friendly facilities in consideration of replacing power section at salve-equipment with solar batteries benefitting the system in light of energy consumption.

• 대한두경부종양학회지
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• 제16권2호
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• pp.191-195
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• 2000

Objectives: Despite various attempts to preserve the normal voice in advanced laryngeal cancer, it is inevitable for many advanced laryngeal cancer patients to undergo total laryngectomy and thus making a trade off between quality and quantity of life. Laryngectomees are faced with voice loss, change in physical appearance and health deterioration which hinder their efforts to rehabilitate back into their family and employment leading to poor quality of life. The objectives of this study were to evaluate the quality of life in long term surviving laryngectomees to, define the factors which are most important in determining their present quality of life and to propose a theoretical model for quality of life after laryngectomy in Korea. Materials and Methods: From 1986 to 1995, 120 laryngectomees with no evidence of disease were followed up for at least 3years were evaluated. Each of 15 quality of life domains with a total of ten points were given for a quality of life score. Results: There was no significant difference in the physical-mental adaptation index such as general health and mental health between the laryngectomees and control group(p>0.05). However, social adaptation index such as social activity, occupational status and economic status for laryngectomees were significantly lower with 2.3, 3.5, and 4.4 points compared to control group with 8.5, 7.6, and 7.1 points respectively(p<0.05). Conclusion : Vocational and social rehabilitation should be emphasized with highest priority for improving their economic status and thus improving their quality of life.

• 정보통신설비학회논문지
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• 제3권1호
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• pp.88-101
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• 2004

The Third Generation (3G) cellular mobile communication systems aim at providing higher data rates, improved quality of service, support for multimedia applications and global roaming. Cdma2000 and Universal Mobile Telecommunication System (UMTS) have emerged as two leading 3G standards in USA and European countries, respectively. Both the standards are capable of delivering high bandwidth data, voice and multimedia services to users of mobile equipment, but are not directly interoperableand are not available across different geographic areas, due to which global roaming is not possible in true sense of using single mobile equipment. However, both UMTS and cdma2000 are based on wideband code division multiple access (WCDMA) as the access method. Due to this, there exist some inherent commonalities between them. In this paper we will try to exploit the commonalities between the two standards in order to design an ASIC, which can provide dual standard capability. This paper discusses the physical layer aspects of the two standards and proposes an approach to design an ASIC which can be mapped to baseband processing part of the physical layer and is capable of delivering for either of the two aforementioned standards.