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2022 ◽  
Vol 169 ◽  
pp. 104657
Author(s):  
Chengcheng Liang ◽  
Chaosheng Song ◽  
Caichao Zhu ◽  
Francesco Cadini ◽  
Siyuan Liu ◽  
...  

2022 ◽  
Vol 22 (1) ◽  
pp. 1-34
Author(s):  
Kevin C. Webb ◽  
Daniel Zingaro ◽  
Soohyun Nam Liao ◽  
Cynthia Taylor ◽  
Cynthia Lee ◽  
...  

A Concept Inventory (CI) is an assessment to measure student conceptual understanding of a particular topic. This article presents the results of a CI for basic data structures (BDSI) that has been previously shown to have strong evidence for validity. The goal of this work is to help researchers or instructors who administer the BDSI in their own courses to better understand their results. In support of this goal, we discuss our findings for each question of the CI using data gathered from 1,963 students across seven institutions.


2022 ◽  
pp. 28-47
Author(s):  
Mohammad Amin Kuhail ◽  
Sujith S. Mathew ◽  
Rawad Hammad ◽  
Mohamed Bahja

Blockchain technology has the potential to revolutionize several industries including finance, supply chain and logistics, healthcare, and more. This primer introduces readers to basic development skills to blockchain foundations including blockchain cryptography, the consensus algorithm, and smart contracts. Further, this primer explains stepwise how to implement and deploy basic data stores using blockchain with Python. The primer serves as a succinct introductory guide to blockchain foundations by relying on a case study illustrated with visuals together with instructions on implementation. This primer is intended for educators, students, and technology enthusiasts with foundational computer science and Python development skills.


2021 ◽  
Vol 21 (6) ◽  
pp. 63-70
Author(s):  
Jaehwan Kwak ◽  
Namgyun Kim ◽  
Man-Il Kim

The Gangwon region (Korea) is severely affected by forest fires, where approximately sixty-six wildfires have occurred over the last three years, which in turn have damaged 1299 ha of this region. Hence, it is necessary to develop schemes for reducing the damage caused by forest fires in Gangwon. In this study, we developed an algorithm for planning evacuation routes. The developed algorithm was applied to a virtual scenario for determining evacuation start points within the spread range of wildfires, fifteen evacuation routes were then determined for each start point, and the associated distance information was displayed. Furthermore, by employing the Naver Maps software, the obtained evacuation routes was compared and analyzed with respect to the route distance. We believe that the results obtained from this study can be used as basic data for making decisions to identify various evacuation routes.


2021 ◽  
Vol 27 (6) ◽  
pp. 1461-1471
Author(s):  
Chae-Won Lim ◽  
Ju-Youn Kim

This study examines the effects of COVID-19 risk perception in women in their 20s and 30s on preventive efficiency and beauty health care behaviors. For this study, a survey was conducted on women in their 20s and 30s in Seoul and Gyeonggi region. It was distributed online from March 28 to April 28, 2021. A total of 610 questionnaires were distributed, of which 602 questionnaires were used for final analysis, excluding 8 unfaithful responses. The collected data was analyzed by using the SPSS WIN 21.0 Program, and the results of the analysis are as follows. First, the level of COVID-19 risk perception, preventive efficiency, and beauty health care behavior among women in their 20s and 30s were found to be high in the order of preventive efficiency, COVID-19 risk perception and beauty health care behavior. Second, it was found that beauty health care behavior has a high correlation of positive(+) in the order of economic, physical, and social perception in relation to COVID-19 risk perception. Third, an analysis of the effects of COVID-19 risk perception on preventive efficiency showed that the higher the social and physical perception of COVID-19 risk perception, the lower the economic perception, the higher the preventive efficiency. Fourth, an analysis of the effect of COVID-19 risk perception on beauty healthcare behavior showed that the higher the economic perception of COVID-19 risk perception, the higher the beauty health care behavior. Therefore, this study raises awareness of COVID-19, promoting preventive action. at the same time, it aims to contribute to the development of the beauty health industry by providing basic data for establishing effective beauty healthcare behavior strategies for the beauty healthcare industry that changes in the environment of the COVID-19 era.


2021 ◽  
Vol 27 (6) ◽  
pp. 1307-1312
Author(s):  
Gum-Ju Sung ◽  
Yong-Mi Jin

The purpose of this study is to increase the artistic value of hair art. And it is about providing basic data and expanding contributions to follow-up research. Hair art works reinterpret the inner beauty of winter flowers that bloom in full bloom in the cold winter. The research method collected prior studies and references based on winter flowers. Also, we selected four types of winter flowers and analyzed their shapes and colors. I created 4 pieces of hair art. As a result, the colorful color of work 1 increased the aesthetic effect due to its high chroma. Works 2 expresses the elegance of irregularly blooming petals on a single stalk. In work 3, warm yellow flowers are soft and cozy on a scrawny tree. The flower in work 4 is seductive navy purple. And the large and small flowers were placed stably with increased concentration. In conclusion, the possibility of creating hair art from a new perspective was confirmed by applying several colors with white wigs. In future research, we look forward to the possibility of combining hair art with nature motifs and re-lighting it with formative art to satisfy its value.


2021 ◽  
Vol 19 (4) ◽  
pp. 627-638
Author(s):  
Hye Jeong Koo ◽  
Ki Han Kwon

Purpose: This study intends to prove whether the efficacy already proven in the existing light therapy LED mask device is similarly exerted in the self-luminous LED sheet mask that does not require power.Methods: The experimental subjects of this study were women with an average age of 47.9 years, and the effect of improving 24-hour moisturizing lasting, skin elasticity, eye expression wrinkles, and facial (cheek) lifting was studied by prohibiting the use of cosmetics containing active ingredients that could affect the results and making them use an LED sheet type mask pack.Results: As a result of the experiment, the 24-hour moisturizing lasting power was 90.573% immediately after use and 37.384% after 24 hours, so it increased significantly (p<0.05), and skin elasticity was also increased by 7.087% immediately after use. After one week, it was increased significantly (p<0.025) to 11.181%. Expression wrinkles around the eyes were significantly reduced (p<0.05) to 1.621% immediately after use and 4.579% after 1 week of use. In the facial (cheek) lifting experiment, the cheek angle (°) was reduced to 2.065% immediately postuse compared to pre-use. Also, it was significantly decreased (p<0.05) with a result of 3.762% after 1 week of use, thus proving that the light therapy LED sheet mask is also effective for skin improvement.Conclusion: Using this research material as basic data, it is expected that various skincare products will be developed as well as mask packs with a simple and easy structure of effective light therapy.


2021 ◽  
Vol 65 (1) ◽  
pp. 15-27

U uvodu se daju temeljni podatci o genezi, rasprostiranju i podjeli kajkavskog narječja. Najbliže se činje- ničnom stanju o genezi kajkavskog narječja smatra mišljenje Z. Junkovića koji je smatrao da je kajkavski dijalekt pripadao panonskoj skupini zapadnoga južnoslavenskoga prajezika koju bi po njemu još spadali prleški, prekmurski i neki zapadnoštajerski govori. Osmanlijska osvajanja uzrokovala su velike migracije stanovništva prema sjeveru i zapadu, a stanovništvo koje ga je kasnije supstituiralo bilo je uglavnom s pod- ručja štokavskog narječja. Od mnogih podjela kajkavskog narječja apostrofira se ona Mije Lončarića koji ga je podijelio na 15 dijalekata.U daljem dijelu rada prikazuju se neke najtipičnije jezične osobine kajkavskih govora na fonološkoj, mor- fološkoj i sintaktičkoj razini. Daju se primjeri minimalnih fonoloških parova između različitih istovrsnih samoglasnika o- ili e- kategorije u pojedinim kajkavskim govorima. U nekim govorima izgubljena je opreka po kvantiteti jer je u tim govorima, kako bi se nadoknadila razlikovna obilježja koja postoje u govorima gdje postoje te opreke, došlo do prefonologizacije prozodijskih suprasegmentalnih obilježja u segmentne. Eliminacija kvantitete važna je poveznica kajkavskog govora s istokom slavenskoga sjevera te poljskim i lužičkim jezicima.Od morfoloških osobina posebno se ističe izricanje morfoloških kategorija s alternacijama samoglasni- ka u nekim dijalektima. Još se apostrofira čuvanje supina, gubitak vokativa, nepostojanje duge množine u A-deklinaciji i nestanak dvojine.U zaključku se kaže da će većina opisa kajkavskih govora koji se u dijalektološkoj literaturi još uvijek navode kao sinkronijska činjenica vrlo brzo postati jezična dijakronija jer su kod većine ispitanika prisutni su znakovi procesa erozije govora koje navodi C. Hagège. Tih promjena ispitanici uglavnom nisu svjesni i oni su većinom još uvijek uvjereni da govore izvornom kajkavštinom, a ne interdijalektom u kojem je veći- na specifičnih osobina njihovih mjesnih govora reducirana. Zaključuje se da kajkavsko narječje ipak neće doživjeti svoj nestanak, već će nestati specifičnosti pojedinih skupina i mjesnih govora s trajno očuvanim „čvrstim dijelovima“.The introduction provides basic data on the genesis, distribution, and division of the Kajkavian dialect. It is thought that the closest to the factual situation on the genesis of the Kajkavian dialect is the opinion of Z. Junković, who believed that the Kajkavian dialect belonged to the Pannonian group of the Western South Slavic proto-language, which according to him would still include the dialects of Prlekija, the dialect of Prekmurje as well as some West Styrian dialects. The Ottoman conquests caused large migrations of the population to the north and west, and the population that later replaced it was mainly from the area of the Štokavian dialect. Of the many divisions of the Kajkavian dialect, the one by Mijo Lončarić is usually em- phasized; it divides the Kajkavian dialect into 15 dialects.The following part of the paper continues to present some of the most typical linguistic features of the Kajkavian vernaculars at the phonological, morphological, and syntactic level. Examples of minimal phono- logical pairs between different identical vowels of the o- or e-category in individual Kajkavian vernaculars are given. In some vernaculars, the opposition in quantity was lost because in these vernaculars, in order to compensate for the distinctive features that exist in vernaculars where these contradictions exist, the prosodic suprasegmental features were transformed into segmental ones. The elimination of quantity is an important link between the Kajkavian dialect and the east of the Slavic North as well as the Polish and the Lusatian language.Among the morphological features, the pronunciation of morphological categories with vowel alterna- tions in some dialects stands out. The emphasis is on the preservation of the supine, the loss of the vocative, the absence of the long plural in the A-declension, and the disappearance of the dual.In conclusion, it is said that most descriptions of Kajkavian vernaculars that are still cited in the dialec- tological literature as a synchronic fact will soon become linguistic diachrony because most respondents have signs of the vernacular erosion process cited by C. Hagège. Respondents are largely unaware of these changes and are mostly still convinced that they speak the original Kajkavian rather than an interdialect in which most of the specific characteristic features of their local dialects have been reduced. It is concluded that the Kajkavian dialect will not disappear but the specific features of individual groups and local dialects with permanently preserved “solid parts” will not be preserved.


Author(s):  
Sang-Jin Yoon ◽  
Kazunori Irie ◽  
Jun-Ho Lee ◽  
Sea-Mi Lim

The purpose of this study was to investigate relationships among mood states, perfectionism, and choking, and to identify a mediating effect of perfectionism on the relationship between mood states and choking experienced by Asian university baseball players in extremely stressful situations during a game. Data collected from a total of 209 male university baseball players were analyzed using SPSS 21 and AMOS 21 statistical software. The mean age of study subjects was 20.25 years. Results are as follows. First, mood states had a positive influence on perfectionism. Second, mood states had no significant influence on choking. Third, perfectionism had a positive influence on choking. Lastly, perfectionism had a complete mediating effect on the relationship between mood states and choking. The study findings will provide basic data to relieve athletes’ psychological burdens, and prevent manifestations of extreme perfectionism and choking, which can ultimately help athletes maintain high self-control of their mood states and perfectionism for better performance.


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