• East Asian mathematical journal
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• v.27 no.4
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• pp.453-470
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• 2011

Arithmetic education is based not only on concept but also fundamentally on intuition. Pestalozzi understood time, a Kant's transcendental intuition, as numbers, a form of cognition, so that he considered intuition essential in arithmetic education. Pestalozzi and Herbart also recommended the intuitive arithmetic education. Significance of the arithmetic education based on intuition resides in the fact that arithmetic, an expression of nature and the world, is succeeded to modern arithmetic education because numbers, a cornerstone of mathematics, are symbolized as a law of mind reasoning.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 1998.11a
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• pp.335-340
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• 1998

This paper presents a study on the electrical fire hazards of leakage current in a distribution circuit simulating a domestic circuit for low voltage. In this simulated circuits, total charges and energy of leakage current are calculated by a theoretical approach and compared with the results obtained from experiments, The approach and results become a cornerstone for studying and analyzing causes of electrical fires.

• 제어로봇시스템학회:학술대회논문집
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• 1989.10a
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• pp.296-301
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• 1989

As a cornerstone of assembly automation, the automatic part feeders are used to feed the various kind of the parts to the assembly workstation in the desired order and fashion. In this paper, EXPERT SYSTEM consisting of the data base for the feeding functions and part properties plus the rule base for the selection of feeder types is developed. The symbolic data of the part properties are used as basic factors in the selection rule of the suitable feeder types.

• Journal of Korean Library and Information Science Society
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• v.31 no.3
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• pp.213-241
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• 2000

'Preservation of records' is the very cornerstone upon which library is founded. The paper is regarded as one of the most proper media for the preservation. This study analyzed the preservation environment for paper records. And this study made several suggestions.

• The Journal of the Korean dental association
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• v.55 no.9
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• pp.634-639
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• 2017

Oral ulcerative and/or vesicular diseases have similar characteristics of clinical phenotypes. Detailed and careful history taking is the cornerstone of the diagnosis of oral mucosal disease. Moreover, complete screening of review of system for patient is important. Through this article, the simple ulcerative, recurrent ulcerative, acute multiple ulcer, chronic multiple ulcerative diseases will be discussed. Clinicians have to keep in mind its differential diagnosis and management.

• Proceedings of the Korean Society for Quality Management Conference
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• 2006.04a
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• pp.149-152
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• 2006

In this paper, We study several method of CTQ measurement for improvement of Quality. Measurement are cornerstone of basic improvement of Science and Technology and are considered continuous thesis. In this paper, we survey measure several variable for CTQ for Six sigma. We introduce Taguchi's SN ration Which is important example good measure for improve quality Improvement are succeed by good select measure variable which is called CTQ which should agree problem define and final goal.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.10a
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• pp.716-719
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• 2019

Collaborative filtering has been used frequently as a recommendation system. To reduce the errors on predicting the ratings that may be given by the user, we propose a new aggregation method to do so. We used a real-world dataset MovieLens to compare our proposed method from previously existing methods, and accordingly to the results, ours was more accurate.

• Journal of IKEEE
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• v.15 no.1
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• pp.70-75
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• 2011

Longitudinal recording has been the cornerstone of all two generations of magnetic recording systems, FDD and HDD. In recent, perpendicular recording has received much attention as promising technology for future high-density recording system Research into signal processing techniques is paramount for the issued storage system and is indispensable like longitudinal recording systems. This paper focuses on the performance evaluation of the various detectors under perpendicular recording system. Parameters for improving the their performance are examined for some detectors. Detectors considered in this work are the partial response maximum likelihood (PRML), noise-predictive maximum likelihood (NPML), fixed delay tree search with decision feedback (FDTS/DF), dual decision feedback equalizer (DDFE) and multilevel decision feedback equalizer (MDFE). Their performances are analyzed in terms of mean squared error (MSE) and noise power spectra, and similarity between recording channel and partial response (PR) channel.

• Journal of Information Technology Applications and Management
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• v.12 no.4
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• pp.105-121
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• 2005

Ubiquitous computing(UC) is an emerging paradigm. Its arrival as a mainstream is expected to trigger innovative UC-driven business models (UCBMs). Currently, there is no Parsimonious methodology to analyze and provide diagnostics for UCBMs. With this research, we propose a analytical architecture that enables the assessment of an UCBM in its structural strengths and weaknesses. With value logic as the cornerstone, the architecture is composed of value actors, value assets, value context, business value Propositions, customer value propositions, value creation logics, and value assumptions. Dimensional variables are initially Identified based on the review of business model literature. Then, their significance is empirically examined through 14 UCBM scenarios, and variables that are expected to Play an important role in the UCBM assessment are decided. Finally, by analyzing the scenarios in terms of the dimensional variables, we attempted to summarize general characteristics of emerging UCBMs.

• Tuberculosis and Respiratory Diseases
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• v.79 no.4
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• pp.241-247
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• 2016

Bronchodilators are the cornerstone of symptomatic chronic obstructive pulmonary disease (COPD) treatment. They are routinely recommended for symptom reduction, with a preference of long-acting over short-acting drugs. Bronchodilators are classified into two classes based on distinct modes of action, i.e., long-acting antimuscarinics (LAMA, once-daily and twice-daily), and long-acting ${\beta}2$-agonists (LABA, once-daily and twice-daily). In contrast to asthma management, evidence supports the efficacy of both classes of long-acting bronchodilators as monotherapy in preventing COPD exacerbations, with greater efficacy of LAMA drugs versus LABAs. Several novel LAMA/LABA fixed dose combination inhalers are currently approved for COPD maintenance treatment. These agents show superior symptom control to monotherapies, and some of these combinations have also demonstrated superior efficacy in exacerbation prevention versus monotherapies, or combinations of inhaled corticosteroids plus LABA. This review summarizes the current data on clinical effectiveness of bronchodilators alone or in combination to prevent exacerbations of COPD.