• Bulletin of the Korean Mathematical Society
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• v.40 no.2
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• pp.223-234
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• 2003

This note contains the following results for a ring A : (1) A is simple Artinian if and only if A is a prime right YJ-injective, right and left V-ring with a maximal right annihilator ; (2) if A is a left quasi-duo ring with Jacobson radical J such that $_{A}$A/J is p-injective, then the ring A/J is strongly regular ; (3) A is von Neumann regular with non-zero socle if and only if A is a left p.p.ring containing a finitely generated p-injective maximal left ideal satisfying the following condition : if e is an idempotent in A, then eA is a minimal right ideal if and only if Ae is a minimal left ideal ; (4) If A is left non-singular, left YJ-injective such that each maximal left ideal of A is either injective or a two-sided ideal of A, then A is either left self-injective regular or strongly regular : (5) A is left continuous regular if and only if A is right p-injective such that for every cyclic left A-module M, $_{A}$M/Z(M) is projective. ((5) remains valid if 《continuous》 is replaced by 《self-injective》 and 《cyclic》 is replaced by 《finitely generated》. Finally, we have the following two equivalent properties for A to be von Neumann regula. : (a) A is left non-singular such that every finitely generated left ideal is the left annihilator of an element of A and every principal right ideal of A is the right annihilator of an element of A ; (b) Change 《left non-singular》 into 《right non-singular》in (a).(a).

• The Journal of the Korean dental association
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• v.20 no.6 s.157
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• pp.513-524
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• 1982

The purpose of this study was to test the statistical significance of Ideal Acceptable Compromise and determine the range of their use according to the Steiner's analysis. 56 adults male and 62 adults female ranging in age from 18 to 20 years with normal occlusion were studied and analyzed statistically. The results were as follows; 1. The authors obtained the ANB range values and ideal acceptable compromise. 2. Simple correlation coefficients of each variables used in the ideal acceptable compromise were obtained. 3. It is most valid that use the ANB angle as a dependent variable among the five variables. 4. In the multiple regression equations, the rank of significant variables were 1 to NA(angle), I to NA(mm), 1 to NB (mm) in male group, and 1 to NA (angle), 1 to NB (angle), 1 to NA (mm), 1 to NB (mm) in female group when ANB angle was used as a dependent variables.

• Bulletin of the Korean Mathematical Society
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• v.20 no.1
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• pp.45-49
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• 1983

If R is ring and M is a right (or left) R-module, then M is called a faithful R-module if, for some a in R, x.a=0 for all x.mem.M then a=0. In [4], R.E. Johnson defines that M is a prime module if every non-zero submodule of M is faithful. Let us define that M is of prime type provided that M is faithful if and only if every non-zero submodule is faithful. We call a right (left) ideal I of R is of prime type if R/I is of prime type as a R-module. This is equivalent to the condition that if xRy.subeq.I then either x.mem.I ro y.mem.I (see [5:3:1]). It is easy to see that in case R is a commutative ring then a right or left ideal of a prime type is just a prime ideal. We have defined in [5], that a chain of right ideals of prime type in a ring R is a finite strictly increasing sequence I$_{0}$.contnd.I$_{1}$.contnd....contnd.I$_{n}$; the length of the chain is n. By the right dimension of a ring R, which is denoted by dim, R, we mean the supremum of the length of all chains of right ideals of prime type in R. It is an integer .geq.0 or .inf.. The left dimension of R, which is denoted by dim$_{l}$ R is similarly defined. It was shown in [5], that dim$_{r}$R=0 if and only if dim$_{l}$ R=0 if and only if R modulo the prime radical is a strongly regular ring. By "a strongly regular ring", we mean that for every a in R there is x in R such that axa=a=a$^{2}$x. It was also shown that R is a simple ring if and only if every right ideal is of prime type if and only if every left ideal is of prime type. In case, R is a (right or left) primitive ring then dim$_{r}$R=n if and only if dim$_{l}$ R=n if and only if R.iden.D$_{n+1}$ , n+1 by n+1 matrix ring on a division ring D. in this paper, we establish the following results: (1) If R is prime ring and dim$_{r}$R=n then either R is a righe Ore domain such that every non-zero right ideal of a prime type contains a non-zero minimal prime ideal or the classical ring of ritght quotients is isomorphic to m*m matrix ring over a division ring where m.leq.n+1. (b) If R is prime ring and dim$_{r}$R=n then dim$_{l}$ R=n if dim$_{l}$ R=n if dim$_{l}$ R<.inf. (c) Let R be a principal right and left ideal domain. If dim$_{r}$R=1 then R is an unique factorization domain.TEX>R=1 then R is an unique factorization domain.

• East Asian mathematical journal
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• v.36 no.1
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• pp.101-114
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• 2020

In this paper, we investigate commutativity of semiprime rings with a derivation which is strongly commutativity preserving and acts as a homomorphism or as an anti-homomorphism on a nonzero Lie ideal.

• Journal of the Korean Mathematical Society
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• v.57 no.4
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• pp.1053-1057
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• 2020

We indicate that some results in [2] are wrong, and obtain some new results on them.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.2 no.2
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• pp.19-32
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• 1979

The title of research is a study on the leadership in Korean management. The purpose of research is that I build up the ideal management-leadership in future which is objective and suitable studying through the existing theory at all points, and analyzing the leadership in Korean management concentrated on situational factors. Moreover it contributes to the promotion of productivity, the contents of research 1. The importance of management-leadership. 2. The development in theory concentrated on a principle of leadership. 3. The development in behavioral scientific leadership, which adopts situational approach to its methodology. 4. The study on the leadership-style and the pursuit of the ideal management-leadership in accordance with behavioral analysis. 5. The build up of leadership in Korean management. The refore I learn the following facts through the study on the leadership in modern management. 1. Leadership consists of the relations among all interdependant variables composing of system. 2. The problem of the increase in the management-leadership effectiveness. 3. The pursuit oriented ideal management-leadership. 4. The build-up of leadership in Korean management. So far 1 have studied the theory of management-leadership at all points and the leadership in Korean management concentrated on situational factors. I learn that leadership is made of the relations among these in building the future management-leadership. Therefore I try to come to the conclusion by raising the following three problems. 1. The increase in leadership effectiveness. 2. Leadership-oriented. 3. The build-up of the leadership in Korean management.

• Journal of Oriental Neuropsychiatry
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• v.13 no.2
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• pp.93-100
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• 2002

Objects and Methods : BDl, STAI and Self-Esteem scale were completed by 28 female subjects who composed of nurses of Kyung Hee Medical Center and students of Kyung Hee Oriental Medical college. At the same time, current weight, height and BMI(Body Mass Index), ideal weight, height and BMI, the difference of current weight and ideal weight, the difference of current height and ideal height, and the difference of current BMI and ideal BMI were measured. Result : 1. There was a significant difference between obese and normal weight group in the difference between the current weight and the ideal weight. The difference of the obese group were higher than the normal weight group. 2. There was a significant difference between obese and normal weight group in the mean BDI score. The mean BDI score of the obese group were higher than that of the normal weight group. 3. There was no significant difference between obese and normal weight group in the mean STAI score. 4. There was no significant difference between obese and normal weight group in the mean Self-Esteem Scale score. Conclusion : There are a tendency; the more weight, the more depression in women.

• Bulletin of the Korean Mathematical Society
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• v.44 no.1
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• pp.151-156
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• 2007

A connection between weak ${\pi}-regularity$ and the condition every prime ideal is maximal will be investigated. We prove that a certain 2-primal ring R is weakly ${\pi}-regular$ if and only if every prime ideal is maximal. This result extends several known results nontrivially. Moreover a characterization of minimal prime ideals is also considered.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.1 no.2
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• pp.193-205
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• 1994

The Study was carried out for the purpose of investigating the degree of perception in nursing activities. The data of this study were collected by self-reported questionnaire composed of 5 point rating scale measure the ideal level and the performance level of nurses activity. For the analysis of the data, percentage, MANOVA and ANOVA were 231 nurses in 3 general hospitals in Taegu. Data was administrated from October 4 through 14, 1994. The results were as follow : 1. The average mean score for the ideal level was 4.19 with a maximum possible score 5points. The highest mean score was Infection Controll and the lowest mean score was nutrition The average mean score for the performance level was 3.75, the highest mean score was fluid and electrolyte, the lowest mean score was nutrition. In the desirable nursing pergormance, Education was found the highest response above charge nurse, Medication was found the highest response above General nurse, environment was found the highest response above aide. 2. In the analysis of the relationship between the ideal level and th performance level, significant defference was found in age, position, career, marital status, occupation satisfaction, Nursing unit, parent. 3. In the analysis of the relationship between the ideal level and the performance level and the general characteristics, significant difference was found in marital status in the ideal level of direct nursing care, significant difference was found in age, position, marital status, nursing unit in the ideal level of indirect nursing care, significant difference was found in age, position, career, marital status, occupation satisfaction, nursing unit in the performance level of direct nursing care. significant difference was found in age (25-29) and above 30 career(4-7 and 7), occupation satisfaction(good and moderate, good and poor) in scheffe test of the performance level of direct nursing care.

• Food Science of Animal Resources
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• v.32 no.4
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• pp.458-466
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• 2012

In this study, consumer preferences toward traditional cheeses were investigated with Tulum cheese sample which is one of the traditional cheeses of Turkey. Type of milk used for Tulum cheese making was identified as the most important factor, followed by Tulum cheese's texture, price, salinity, fat content, origin and flavour. The ideal Tulum cheese profile for the overall consumers was made with cow milk, a hard texture, a price of 20 TL per kg, a low salt cheese, a full fat cheese, the regional cheese which belongs to Izmir region and a mild-flavoured cheese.A cluster analysis revealed there were two clusters with different ideal product profiles. Cluster 1's ideal Tulum cheese comprised a soft texture, a mild-flavoured cheese, a cheese made with cow milk, a full fat cheese, a low salt cheese, the regional cheese which belongs to Izmir region and a price of 10 TL per kg. Cluster 2 differed from cluster 1 in that its ideal Tulum cheese was a hard textured cheese and priced at 20 TL per kg. The consumers in cluster 2 were less price sensitive than those in cluster 1. In addition to, the consumers in both segments are ready to pay extra money for regional Tulum cheese versus non-regional Tulum cheese. We found that the older ones were more willing to pay as compared to younger individuals. Young people are critical target consumers for Tulum cheese marketers. The findings on cluster 1's ideal Tulum cheese of this study could therefore provide guidance to marketing managers.