• Journal of Korea Technology Innovation Society
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• v.1 no.3
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• pp.374-385
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• 1998

This study is estimates telephone service demand based on empirical studies of telecommunication service demand model. First, the telephone charge(call price index) by each location and subscription fee bring about a negative effect to telephone distribution rate: while the other explanatory variables bring about a positive effect. Second, the flexibility of telephone charge in A location(relevant location) and the flexibility between the distance of A location and B location are negative values, while the flexibility of other explanatory variables is represented in a positive value. This means that the long distance call numbers from A location to B location are in inverse proportion against the phone charge(call price index) of A location and against the distance between A location and the distance of other locations except A location, while they are in direct proportion with an average call number per minute from A location to other locations except A location, and also with subscription numbers of A location, other subscribers in locations other than A location, and the total expenditures of A location.

• Journal of Korean Biological Nursing Science
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• v.11 no.2
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• pp.157-166
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• 2009

Purpose: The purpose of this study was to determine the effects of self-care program using Short message service (SMS), e-mail, or telephone call on self-care compliance and nutritional status in maintenance of hemodialysis patient. Methods: Nonequivalent pretest-posttest control experimental design was used. Ninety-six patients were allocated to control (n=24), SMS (n=24), e-mail (n=24), or telephone (n=24) group from four hospitals. Experimental groups received self-care program about hemodialysis diet, drug administration, exercise, and fistula care by SMS, e-mail, or telephone call respectively at 3 times a week for 4 weeks. Results: Subjective self-care compliance, and objective self-care compliance including interdialytic weight of SMS and telephone groups were significantly increased than those of control groups. However, nutritional status of SMS and e-mail groups were significantly improved than those of control groups in albumin and protein level. Conclusion: Self-care program using SMS and telephone call were effective on promoting self-care compliance, while SMS and e-mail were effective on improving nutritional status. The pop-up remaining effect and easy accessible effect of SMS message in busy daily life was considered as an alarm to control fluid and diet.

• International journal of advanced smart convergence
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• v.8 no.3
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• pp.69-77
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• 2019

Today, most of elevators have an emergency call facility for emergency situations. However, if the network installed in the elevator is also out of power, it cannot be used for the elevator remote monitoring and management. So, we develop an integrated and unified emergency call system, which can transmit not only telephone call but also data signals using PSTN(Public Switched Telephone Network) in order to remote monitoring and management of elevators, even though a power outage occurs. The proposed integrated emergency call system to process multiple data such as voice and operational information is a multi-channel board system which is composed of an emergency phone signal processing module and an operational information processing module in the control box of elevator. In addition, the RMS(remote management server) systems based on the Web consist of a dial-up server and a remote monitoring server where manages the elevator's operating information, status records, and operational faults received via the proposed integrated and unified emergency call system in real time. So even if there's a catastrophic emergency, the proposed RMS systems shall ensure and maintain the safety of passengers inside the elevator. Also, remote control of the elevator by this system should be more efficient and secure. In near future, all elevator emergency call system need to support multifunctional capabilities to transmit operational data as well as phone calls for the safety of passengers. In addition, for safer elevators, it is necessary to improve them more efficiently by combining them with high-tech technologies such as the Internet of Things and artificial intelligence.

• Child Health Nursing Research
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• v.2 no.1
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• pp.112-126
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• 1996

The purpose of this study was to investigate the current status of the need of telephone call and to identify the status of nursing intervention through telephone. Head nurses of the pediatric nursing unit and a nurse of pediatric outpatient clinic wrote down the telephone record of calls by parents of children discharged from hospital from 7 am to 3 pm during the period of March to June, 1995. Content of 120 telephone calls but for 26 calls with incomplete record among 146 calls were analyzed into frequency of general characteristics, needs and nursing intervention. The needs of telephone call were identified and classified into 11 areas and analyzed into frequency of detailed content by 11 areas. Nursing intervention was identified and classified into 10 categories, and analyzed into frequency of detailed content by 10 categories. The findings of this study were as follows ; The need of telephone call was identified with nutritional state, medication, vital signs, language retardation, personal hygiene, vaccination, administration procedure, physical symptoms, follow up care management and others. The most frequent needs were physical symptoms and vaccination. A kind of food among nutrition dose of drugs among medication, fever among vital signs, cough among physical symptoms, and content of vaccination among vaccination was the most frequent needs. Nursing intervention through telephone was identified with instruction, knowledge offer, information offer, judgement, solicitation, referral and instruction, referral, connection, reassurance, reservation, and regulation. Instruction, knowledge offer and information offer was the most frequent nursing intervention by telephone call. Instruction was about a visit to hospital, a visit to nearby clinic, instruction about symptoms,, instruction about nursing care procedure, retelephoning and vaccination. Knowledge offer was about vaccination, knowledge related to medication, and dental care. Information offer and judgement was about vaccination and medication. Referral and instruction delivery was about instruction delivery following consultation to doctor, visit to emergency room and a visit to hospital following consultation to doctor. These results suggest that telephone call intervention program should be established as a field of extended pediatric nursing role in health care delivery system for the children.

• Journal of the Korean Data and Information Science Society
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• v.18 no.2
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• pp.561-572
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• 2007

In this paper, we describe various efficient optimization algorithms for obtaining an optimal customer allocation in the telephone call center. The main advantages of the proposed algorithms are simple, fast and very attractive for massive dataset. The proposed algorithms also provide comparable performance with the other more sophisticated linear programming methods. The proposed optimal allocation algorithms increase the customer contact, response rate and management product and optimize the performance of call centers. Simulation results are given to demonstrate the effectiveness of our algorithms.

• Proceedings of the KIEE Conference
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• 2002.11c
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• pp.573-576
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• 2002

In this paper we propose multi-functional telephone rejecting a simultaneous call at home or small office with several telephones in one line. Also we describe the protocol to transfer a call to the other telephone in different place with ease. So the proposed scheme can protect a personal privacy and provide the conveniency. Since the proposed phone is implemented with Holtek HT95C20P microprocessor, the most of functions can be easily changed accordance with user's needs.

• Speech Sciences
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• v.12 no.2
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• pp.183-191
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• 2005

This paper describes the automated call routing for call center system based on speech recognition. We focus on the task of automatically routing telephone calls based on a users fluently spoken response instead of touch tone menus in an interactive voice response system. Vector based call routing algorithm is investigated and normalization method suggested. Call center database which was collected by KT is used for call routing experiment. Experimental results evaluating call-classification from transcribed speech are reported for that database. In case of small training data, an average call routing error reduction rate of 9% is observed when normalization method is used.

• The Korean Journal of Applied Statistics
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• v.16 no.2
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• pp.247-259
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• 2003

In Korea, quota sampling is mainly adopted in telephone surveys, instead of random sampling which requires call-back procedure and random selection of respondent within households. The contact mode based on the se $x^{*}$age quotas is economically more advantageous and less time-consuming. However, it lacks theoretical ground for valid statistical inference, so that it is hardly accepted in academic circles despite of widely spread practice. Subsequently, survey theoreticians argued that random sampling-based telephone surveys should be tried. In response, Research & Research (R&R), a private research company in Seoul, executed atelephone survey by random sampling mode for the prediction of 2002 Ulsan City Mayor Election. The aim of this case study is to find out various effects of the call-back rule with random selection of respondents by statistically re-analyzing R&R’s Ulsan Survey Data.s by statistically re-analyzing R&R’s Ulsan Survey Data.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2001.05a
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• pp.25-39
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• 2001

Calling Party Pays(CPP) and Receiving Party Pays(RPP) are the models for billing mobile telecom services. CPP makes the person who originates the call liable for the per-minute charges, even if the caller is not a mobile telephone customer. However, RPP makes the person who receives a call pay the per-minute charges associated with that call. This paper collected and analyzed some foreign cases to understand the impact of CPP and RPP. This paper also analyzes the key issues that will face the industry in implementing CPP and RPP.

• MALSORI
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• no.43
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• pp.179-188
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• 2002

Improving the recognition performance of connected digit telephone speech still remains a problem to be solved. As a basic study for it, this paper analyzes the variation of feature parameters of Korean digit telephone speech according to channel distortion. As a feature parameter for analysis and recognition MFCC is used. To analyze the effect of telephone channel distortion depending on each call, MFCCs are first obtained from the connected digit telephone speech for each phoneme included in the Korean digit. Then CMN, RTCN, and RASTA are applied to the MFCC as channel compensation techniques. Using the feature parameters of MFCC, MFCC+CMN, MFCC+RTCN, and MFCC+RASTA, variances of phonemes are analyzed and recognition experiments are done for each case. Experimental results are discussed with our findings and discussions