• KSII Transactions on Internet and Information Systems (TIIS)
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• v.13 no.3
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• pp.1502-1522
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• 2019

Leakage of secret keys may be the most devastating problem in public key cryptosystems because it means that all security guarantees are missing. The forward security mechanism allows users to update secret keys frequently without updating public keys. Meanwhile, it ensures that an attacker is unable to derive a user's secret keys for any past time, even if it compromises the user's current secret key. Therefore, it offers an effective cryptographic approach to address the private key leakage problem. As an extension of the forward security mechanism in certificate-based public key cryptography, forward-secure certificate-based signature (FS-CBS) has many appealing merits, such as no key escrow, no secure channel and implicit authentication. Until now, there is only one FS-CBS scheme that does not employ the random oracles. Unfortunately, our cryptanalysis indicates that the scheme is subject to the security vulnerability due to the existential forgery attack from the malicious CA. Our attack demonstrates that a CA can destroy its existential unforgeability by implanting trapdoors in system parameters without knowing the target user's secret key. Therefore, it is fair to say that to design a FS-CBS scheme secure against malicious CAs without lying random oracles is still an unsolved issue. To address this problem, we put forward an enhanced FS-CBS scheme without random oracles. Our FS-CBS scheme not only fixes the security weakness in the original scheme, but also significantly optimizes the scheme efficiency. In the standard model, we formally prove its security under the complexity assumption of the square computational Diffie-Hellman problem. In addition, the comparison with the original FS-CBS scheme shows that our scheme offers stronger security guarantee and enjoys better performance.

• Journal of Oriental Neuropsychiatry
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• v.33 no.4
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• pp.473-484
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• 2022

Objectives: To report a case of a patient with a mild depressive episode accompanied by physical symptoms such as hyposmia visiting a Korean medicine hospital who was treated with oriental psychotherapy in parallel with existentialism-based psychotherapy showing improvement. Methods: For this patient, Korean medicine Psychotherapy was mainly used for treatment. In parallel, existential Psychotherapy, acupuncture treatment, and self-relaxation training were implemented. For estimating this treatment, changes in results of Beck Depression Index (BDI), Beck Anxiety Index (BAI), Numeric Rating Scale (NRS), Korean Version of Sniffin' Sticks Test (KVSS), Butanol Threshold Test (BTT), Cross-Cultural Smell Identification Test (CC-SIT), and somatic symptoms that the patient subjectively expressed were determined. Results: After the comprehensive treatment, it was confirmed that changes in BDI, BAI, KVSS, BTT, CC-SIT, NRS, and subjective somatic symptoms expressed by the patient all showed improvements. Conclusions: We propose that a comprehensive treatment using Korean medicines Psychotherapy in parallel with existential psychotherapy can be used for patients who complain of physical symptoms accompanied by depression and hyposmia.

• Journal of Korean Academy of Nursing
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• v.38 no.5
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• pp.758-767
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• 2008

Purpose: The purpose of this study was to explore and describe life-stories and meanings of life in wives of alcoholics by analyzing their autobiographies. Methods: Autobiographies were collected from 20 participants who produced their own autobiographies in the logotherapeutic autobiography program at community alcohol counseling centers in Korea. The data were coded to identify themes of agency and communion using the manual coding system developed by McAdams, and analyzed by the existential approach. Results: There were 214 coded episodes in twenty autobiographies. There were 128 agency themes and 86 communion themes. The most common themes were Love/Friendship. Five themes emerged from the autobiographical episodes on the existential perspective: 1) overcoming the suffering, 2) meaningful people and relationships, 3) spiritual maturation, 4) caring and helping, and 5) finding a meaning of life. Conclusion: These results showed that the wives of alcoholics who participated in the logotherapeutic autobiography program found the meaning of life through their suffering. Furthermore, a study on existential nursing interventions for people who have meaninglessness in life needs to be done.

• The Journal of Korean Academic Society of Nursing Education
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• v.23 no.3
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• pp.300-308
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• 2017

Purpose: The purpose of this study is to examine the factors that influence the clinical practice of nursing students and to identify the mediating effects of spiritual well-being in the relation between stress of clinical practice and burnout caused by clinical practice. Methods: Data were collected by self-report questionnaires targeting 420 nursing students in three nursing colleges located in Gyeonggi and Chungnam province. Results: Burnout of clinical practice according to general characteristics of the study subjects showed significant difference in religion (t=1.895, p=.049). Stress of clinical practice and burnout of clinical practice showed positive correlation (r=.42, p<.001), existential spiritual well-being showed negative correlation between stress of clinical practice (r=-.17, p<.001) and burnout of clinical practice (r=-.47, p<.001). In addition, religious spiritual well-being in spiritual well-being showed no mediating effects and existential spiritual well-being showed mediating effects between burnout in clinical practice stress. Conclusion: In order to alleviate the stress of clinical practice for burnout of clinical practice prevention of nursing students, solutions to improve the existential spiritual well-being will be required in the future.

• Women's Health Nursing
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• v.3 no.2
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• pp.157-179
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• 1997

The purpose of this study is to provide a basis for nursing intervention strategies to enhance health promoting practice that are constructive to a healthy lifestyle. Data were collected through self-reported questionnaires from 281 middle-aged women living in Seoul, Kyeung ki, Taegu, Kyeung pook, and Kyeung nam from July to September 1997. The following instruments were used in the study after some adaption : scale of perceived health status, self-esteem, perceived benefits, family hardiness index, purpose in life, Walker and other health promoting lifestyle profiles. The data were analyzed, by t-test, ANOVA Scheffe's Pearson's correlation & stepwise multiple regression, by using the SAS program. The results are as follows : 1) The average score for the health promoting lifestyle was 2.65. In the sub-categories, the highest degree of practice was self-actualization (2.91), and in the lower degree was health responsibility (2.13). 2) In the relation ship between social demographic and health promoting lifestyle there were significant differences ineducation, occupation, economic status, and type of family. 3) There is a significant correlation between perceived health status, self-esteem, perceived benefits, family hardiness index, existential vacuum and total & subcategory health promoting lifestyles. 4) Existential vacuum was the highest factor predicting a health promoting lifestyle for middle-aged women (38.0%). 5) Existential vacuum, commitment and self-esteem accounted for 45.9% of the total variance.

• Korean Journal of Logic
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• v.14 no.2
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• pp.105-121
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• 2011

The late professor Young-Jung Kim advanced a view that Existential Specification Rule (ES Rule) can be understood as a kind of polylemma. In arguing for this view, he also claimed that all propositions containing free variables are universal propositions. In this paper, I argue that his view on free variables incur numerous problems. Moreover, I introduce a new rule of inference called 'Universalized Conditionalization Rule' (UC Rule), so that I can show that his insight about ES Rule can be substantialized without an appeal to his problematic view on free variables. Finally, I show that ES Rule can be directly derived from UC Rule.

• Journal of English Language & Literature
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• v.57 no.6
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• pp.1017-1041
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• 2011

This study investigates Korean EFL learners' awareness and use of the English existential there-construction by examining data collected from 54 Korean EFL learners of English by means of a pragmalinguistic judgment task and a controlled discourse completion task. The results of the judgment task reveal that lower proficiency learners rated canonical sentences and existentials with a preposed locative best in the communicative situations where the use of existentials would have been most appropriate. A comparison of the ratings by more proficient learners and native speakers shows that existentials received highest ratings by both groups where they are the most natural option, while canonical sentences received significantly higher ratings by the learners. With regard to the production data, learners tended to avoid existentials, but rather relied on canonical sentences. Existentials were rarely used by lower proficiency learners and not used productively even by more proficient learners in the situations where existentials would have been the most natural option. These results suggest that Korean learners' difficulty with the use of existentials is not merely a product of performance limitations, but attributable to limited knowledge about existentials and their syntactic alternatives in terms of contextual appropriateness. Lower proficiency learners lack such knowledge, and more proficient learners, while showing better awareness of the use of existentials, have problems as to the placement of new information when engaging in writing tasks that place lower level of demands on attention to the information status of noun phrases compared to communicative, oral tasks.

• Journal of Korean Public Health Nursing
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• v.17 no.2
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• pp.255-265
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• 2003

This study was conducted to provide a baseline data for hospice nurses to improve their practices for the spiritual wellbeing of their clients. Analysis of the spiritual wellbeing status of hospice patients was conducted from April 20 to June 20, 2002. A total of 59 cancer patients who admitted to hospice care units of one university medical center, and who have alert mental status were recruited for the study. Paloutzian and Ellison (982) spiritual wellbeing scale and Jungho Kang (996) scale, which was modified for the cancer patients, were used as the study instruments, ANOVA and T-test were applied using SPSS win 10.0 for statistical analysis. The results are as follows : 1. The mean spiritual wellbeing score of the hospice patients was $49.76(SD\pm7.95)$. When it was converted into 4 point scale, the mean score for the spiritual wellbeing was 2.49. The mean religious wellbeing score was $24.17 (SD\pm5.56)$ and that of the existential wellbeing was $25.59 (SD\pm3.10)$. 2 The mean score for the total spiritual wellbeing was $52.54 (SD\pm8.12)$ for female, and $47.86 (SD\pm6.95)$ for male and the difference was statistically significant (t=-2.305, p=.025), 3. In testing the spiritual wellbeing, there was significant difference according to the religion (F=28.931, p=.000). 4. In testing the religious wellbeing, the mean score was $22.77 (SD\pm5.35)$ for male, and $26.20 (SD\pm5.32)$ for female and the difference was statistically significant (t=-2.430, p=.019). 5. In testing the religious wellbeing, there was significant difference according to the religion (F=37.522, p=.000). However, the religious wellbeing was not different according to the age, occupation, marital status and education level. 6. In testing the existential wellbeing. there was significant difference according to the religion (F=8.147, p=.000). However, mean score for the existential wellbeing was not significantly different according to sex, age, occupation, marital status and education level. 7. In testing the existential wellbeing, there was significant difference according to the level of vigor (F=3.662, p=.032), while no difference was observed in the existential wellbeing according to the general health status, degree of pain, and diagnosis. From the results described above it can be concluded that : To improve the spiritual wellbeing status of hospice patients, hospice nurses should identify spiritual needs of the patients according to the religion. gender and the level of vigor.

• The Journal of Fisheries Business Administration
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• v.55 no.1
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• pp.55-76
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• 2024

The purpose of this study is to elucidate the impact of authenticity on experience value and subjective well-being among visitors who have participated in direct experiential activities in experiential fishing villages. The research method used literature research methods and empirical research methods using questionnaires, and this questionnaire was composed by determining three major variables and seven constituent factors for each variable through factor analysis and conducting prior research and preliminary surveys. The survey was conducted from February 5, 2023 to April 5, 2023 among experimental fishing villages with excellent ratings for scenery (environment), service, experience, accommodation, and food, and four villages that can experience tidal flats and manage customers online. The survey was conducted from February 5, 2023 to April 5, 2023, among experimental fishing villages with excellent ratings for scenery (environment), service, experience, accommodation, and food, and four villages that can experience tidal flats and manage customers online. The results of this study are as follows. First, the factors of authenticity in experiential fishing villages include three sub-factors: objective authenticity, constructive authenticity, and existential authenticity. The factors of experience value include two sub-factors: emotional values and functional values. Subjective well-being is derived from positive emotion and life satisfaction. Second, upon examining the importance of authenticity in experiential fishing villages, it was found that existential authenticity and objective authenticity, in that order, have a significant impact on emotional values. However, constructive authenticity did not have a significant impact on emotional values. Third, in terms of functional values, constructive authenticity, existential authenticity, and objective authenticity, in that order, had a significant impact. Fourth, experience value, in the order of emotional values and functional values, had a significant impact on positive emotion and life satisfaction of subjective well-being. Therefore, it was confirmed that the authenticity of experiential fishing villages is important as a strategy to enhance experience value and subjective well-being. Especially, considering that the majority of visitors to experiential fishing villages are family-centered (86.5%), applying marketing management strategies to develop programs that enhance existential authenticity and improve emotional values could elevate the subjective well-being of experiential visitors.

• Journal of architectural history
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• v.14 no.2 s.42
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• pp.21-40
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• 2005

The purpose of this study was to analyze the features of the avant-garde architecture in the end of the 20th Century based on the ontology as a metalanguage. In view of the results so for achieved, it is possible to say that the thought of becoming, topology, rhizome thought and the Deleuze's concepts of the fold and the event as ever-changing and evolving at any given time are found in the avant-garde architecture, and the introduction of ontological thought into architectural design encourage hopes for a more natural and existential quality in architecture. However, the avant-garde architecture in the end of the 20th century disclosed the limitation in the architectural expression of ontological thought due to the lack of fully understand on ontology. In conclusion, the ontological approach in architecture offers a new morphological methodology and a new way of programming considering the existential aspect of space through the bricoleur's means leaving the ontological meaning of architecture itself.