30 research outputs found
A view-based hypermedia design methodology
No full textHypermedia extends the hypertext paradigm into multimrdia. Recently, many enterprises have attempted to incorperate hypermedia functionality into their diverse range of business applications such as decision support systems, document management, software management, and team collaboration. This paper presents a methodology for designing hypermedia applications based on users views. In designing hypermedia applications, view support is highly desirable. The methodology consists offive phares: requirement analysis, data modeling, view design, navigational design and mapping. Views art generated from the entity-relationship diagram, and used for subsequent novigational and mapping design. This methodology is especially effective for intergrating enterprise wit distributed hypermedia systems on the Internet
A Study on Indexing Efficiency and Retrieval Accuracy for Author Name Search of Academic Papers
No full textAbstract: Most academic information has its creator, that is, a subject who has created the information. The subject can be an individual, a group, or an institution, and can be a nation depending on the nature of the relevant information. Most web data are composed of a title, an author, and contents. A paper which is under the academic information category has metadata including a title, an author, keyword, abstract, data about publication, place of publication, ISSN, and the like. A patent has metadata including the title, an applicant, an inventor, an attorney, IPC, number of application, and claims of the invention. Most web-based academic information services enable users to search the information by processing the meta-information. An important element is to search information by using the author field which corresponds to a personal name. This study suggests a method of efficient indexing and using the adjacent operation result ranking algorithm to which phrase search-based boosting elements are applied, and thus improving the accuracy of the search results of author name. This method can be effectively applied to providing accurate search results in the academic information services
(A) study on the estimation of the character value in media works : based on network centralities and web-search data
No full text학위논문(석사) - 한국과학기술원 : 정보경영프로그램, 2021.8,[iii, 36 p. :]기업의 무형자산의 가치는 그 중요성에도 불구하고 측정에 대한 어려움이 존재하여, 오랜 기간 그 가치를 어떻게 평가할 수 있을지 활발히 연구되어 왔다. 그 중 미디어 산업에서의 캐릭터 가치는 산업의 빠른 성장성에도 불구하고, 그 가치를 정량적으로 평가하기에 적절한 방법이 존재하지 않는다는 문제가 있다. 본 연구에서는 소셜 네트워크 분석 (Social Network Analysis) 방법론을 활용하여 미디어 작품의 캐릭터 네트워크 특징이 인간의 검색 행위와 높은 상관성을 지닌다는 것을 밝힌다. 기존의 미디어 분야에서는 SNA 방법론을 활용하여 작품을 깊이 있게 분석하는 연구가 이루어져 왔다. 본 연구에서는 이에 더하여 미디어 작품은 인간의 행동에 영향을 줄 수 있는 힘을 지니고 있다는 점에 주목하여, 작품 내 캐릭터 네트워크 특징이 인간의 검색 행동에 영향을 줄 수 있을 것이라는 가정 하에 연구를 진행하였다. 연구분석 결과를 통해 미디어 작품의 캐릭터 네트워크 중심성 척도와 검색 데이터 간 상관성을 확인하였으며, 이를 바탕으로 캐릭터 네트워크 중심성 척도가 캐릭터 자산의 가치평가를 위한 단서로서 활용될 수 있음을 발견하였다.한국과학기술원 :정보경영프로그램
Side-Channel Vulnerabilities of Unified Point Addition on Binary Huff Curve and Its Countermeasure
No full textUnified point addition for computing elliptic curve point addition and doubling is considered to be resistant to simple power analysis. Recently, new side-channel attacks, such as recovery of secret exponent by triangular trace analysis and horizontal collision correlation analysis, have been successfully applied to elliptic curve methods to investigate their resistance to side-channel attacks. These attacks turn out to be very powerful since they only require leakage of a single power consumption trace. In this paper, using these side-channel attack analyses, we introduce two vulnerabilities of unified point addition on the binary Huff curve. Also, we propose a new unified point addition method for the binary Huff curve. Furthermore, to secure against these vulnerabilities, we apply an equivalence class to the side-channel atomic algorithm using the proposed unified point addition method
Effect of Emotional Information Preference on Cognitive Processes: Specifics for Decision-making
No full textEmotions affect cognitive processes such as memory and reasoning, but cognitive evaluation and control processes are also important to our emotional experiences. The current study aims to examine the effect of emotional information preference on decision-making processes and whether cognitive processing is affected by task self-relevance and cognitive load. Participants completed the Mini-Mental State Examination (MMSE) and the Cognitive Load Valence interaction. We found that both young and older adults show emotional information preferences when under load and emotional preference in the absence of load for all types of self-reliabilities. The cognitive load valence interaction revealed that the young adults exhibited a more robust negativity decrease when under cognitive load than a positive decrease, with the positive information preference maintained under both cognitive load and no cognitive load The findings from the present study support DIT's suitability for examining emotional information selectivity during decision making processes based on information acquisition goals
Cannibalizing or Complementing?. The Impact of Online Streaming Services on Music Record Sales
No full textAbstractThe Internet has changed the media contents industry, and the music industry's business form has transformed from records into online digital products as the online music platform increasingly develops. Before the stabilization of the online music platform, digital music files were considered music piracy and were related to the decline of music record sales. Although research finds that increased Internet penetration led the decline of music record sales, after the stabilization of the online music platform and the introduction of online streaming services in the mid-2000s, a recognizable increase in music record sales appeared. We analyze the impact of adopting online music streaming services on the sales of music records to determine the effect of digital products on physical products by a two-stage least squares (2SLS) regression approach. Using monthly music record sales and streaming data from the official Korean Gaon Music Chart, we find that online streaming services positively impact music record sales. Furthermore, male artists sell more records than female artists as female fans, who prefer male artists, have a higher willingness-to-pay for individual services. Both the number of songs included in one album and the number of artists in one group also positively affect music record sales. Our analysis suggests that online streaming positively impacts music record sales
Novel Key Recovery Attack on Secure ECDSA Implementation by Exploiting Collisions between Unknown Entries
Get PDFIn this paper, we propose a novel key recovery attack against secure ECDSA signature generation employing regular table-based scalar multiplication. Our attack exploits novel leakage, denoted by collision information, which can be constructed by iteratively determining whether two entries loaded from the table are the same or not through side-channel collision analysis. Without knowing the actual value of the table entries, an adversary can recover the private key of ECDSA by finding the condition for which several nonces are linearly dependent by exploiting only the collision information. We show that this condition can be satisfied practically with a reasonable number of digital signatures and corresponding traces. Furthermore, we also show that all entries in the pre-computation table can be recovered using the recovered private key and a sufficient number of digital signatures based on the collision information. As case studies, we find that fixed-base comb and T_SM scalar multiplication are vulnerable to our attack. Finally, we verify that our attack is a real threat by conducting an experiment with power consumption traces acquired during T_SM scalar multiplication operations on an ARM Cortex-M based microcontroller. We also provide the details for validation process
Hybrid Approach for Large Size FC-BGA to Enhance Thermal and Electrical Performance Including Power Delivery
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Electrospun Poly(L-Lactic Acid)/Gelatin Hybrid Polymer as a Barrier to Periodontal Tissue Regeneration
No full textPoly(L-lactic acid) (PLLA) and PLLA/gelatin polymers were prepared via electrospinning to evaluate the effect of PLLA and gelatin content on the mechanical properties, water uptake capacity (WUC), water contact angle (WCA), degradation rate, cytotoxicity and cell proliferation of membranes. As the PLLA concentration increased from 1 wt% to 3 wt%, the tensile strength increased from 5.8 MPa to 9.1 MPa but decreased to 7.0 MPa with 4 wt% PLLA doping. The WUC decreased rapidly from 594% to 236% as the PLLA content increased from 1 to 4 wt% due to the increased hydrophobicity of PLLA. As the gelatin content was increased to 3 wt% PLLA, the strength, WUC and WCA of the PLLA/gelatin membrane changed from 9.1 ± 0.9 MPa to 13.3 ± 2.3 MPa, from 329% to 1248% and from 127 ± 1.2° to 0°, respectively, with increasing gelatin content from 0 to 40 wt%. However, the failure strain decreased from 3.0 to 0.5. The biodegradability of the PLLA/gelatin blend increased from 3 to 38% as the gelatin content increased to 40 wt%. The viability of L-929 and MG-63 cells in the PLLA/gelatin blend was over 95%, and the excellent cell proliferation and mechanical properties suggested that the tunable PLLA/gelatin barrier membrane was well suited for absorbable periodontal tissue regeneration
