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Development of the ship hull assembly sub-process 船体装配子工艺的开发

St open Pub Date : 2022-12-19 DOI: 10.48188/so.3.12

Stipe Antunović, B. Ljubenkov, Karmela Prlac

{"title":"Development of the ship hull assembly sub-process","authors":"Stipe Antunović, B. Ljubenkov, Karmela Prlac","doi":"10.48188/so.3.12","DOIUrl":"https://doi.org/10.48188/so.3.12","url":null,"abstract":"Objective: The development of the ship hull assembly pro-cess is possible by changing the method of assembly of basic parts at the building site, which would shorten the duration of the process and lead to cost reduction. One of the pos-sibilities is to increase the dimensions and mass of basic building units, as well as the crane capacity at the building site.Methods: Ship hull assembly methods involving sections, blocks and modules are used in the hull assembly phase. In the world’s best shipyards, ships are built from blocks or modules, in which as much equipment as possible is in-stalled. This paper uses the finite element method (FEM) for structural analysis, and its results serve to define the opti-mal technological instructions for the vertical transport of ship hull structure blocks.Results: The development of the ship hull assembly sub-pro-cess can be achieved by using the hull block assembly meth-od instead of the hull section assembly method. For the ship presented in this paper, the mass of a block transported to the building site was increased 3 times, so the number of building units was reduced by 65%. This reduces trans-port activities on the building site and shortens the dura-tion of the assembly process by 20%. This paper shows that strengthening the block structure with temporary stiffen-ers is necessary for safe transport. It is possible to optimize their number and layout by using structural analysis.Conclusion: The development of numerical finite element methods, software packages, and computers allow wider use of structural analysis in solving engineering problems in shipbuilding technology. The simulation of realistic sit-uations, a wide range of analyses and a large number of results become possible, and they raise the level of knowledge and enable better decision-making in the pro-duction process.","PeriodicalId":422483,"journal":{"name":"St open","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130391735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of the reasons for the departure of a part of the Serb minority from Croatia during Operation Storm in August 1995 分析1995年8月风暴行动期间一部分塞族少数民族离开克罗地亚的原因

St open Pub Date : 2022-12-15 DOI: 10.48188/so.3.11

Ante Nazor, Andrijana Perković Paloš

{"title":"Analysis of the reasons for the departure of a part of the Serb minority from Croatia during Operation Storm in August 1995","authors":"Ante Nazor, Andrijana Perković Paloš","doi":"10.48188/so.3.11","DOIUrl":"https://doi.org/10.48188/so.3.11","url":null,"abstract":"Objective: To investigate the reasons behind the departure of a part of the Serb minority from temporarily occupied areas of the Republic of Croatia, mostly during Operation Storm, and to determine if the departure was instigated by the Croatian police and military forces in August 1995. Methods: We used sources of Serbian, Croatian, and inter-national provenance. Besides publicly available sources, we accessed official documents of the Republic of Serb Krajina (RSK), Serbian and Montenegrin media articles, the pub-lished assessments of Serbian politicians, and the testimo-nies of refugee Serbs that are principally archived at the Croatian Memorial-Documentation Center of the Homeland War, Zagreb, Croatia. Findings: We found evidence that the departure of a part of the Serb minority, which occurred mostly during Operation Storm, was voluntary. Among other sources, we present the RSK administration’s two official and explicit orders for the Serb minority to leave the occupied Croatian ter-ritory, which resulted in their departure to Bosnia and Herzegovina (B&H) and Serbia. The accusations that the al-leged brutalities and crimes conducted by Croatian forces and authorities caused the evacuation proved to be inflated and unrelated to the military operation. Conclusion: The departure of a part of the Serb minority from the temporarily occupied territory of the Republic of Croatia, which occurred mostly during Operation Storm in August 1995, was not in response to any actions or threats by Croatia, but was pre-planned by the Serb political and military leadership and was accepted mostly voluntarily by the RSK populatio","PeriodicalId":422483,"journal":{"name":"St open","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134273986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

System for automatic detection and classification of cars in traffic 系统自动检测和分类车辆在交通

St open Pub Date : 2022-10-31 DOI: 10.48188/so.3.10

Niko Bralić, J. Musić

{"title":"System for automatic detection and classification of cars in traffic","authors":"Niko Bralić, J. Musić","doi":"10.48188/so.3.10","DOIUrl":"https://doi.org/10.48188/so.3.10","url":null,"abstract":"Objective: To develop a system for automatic detection and classification of cars in traffic in the form of a device for autonomic, real-time car detection, license plate recognition, and car color, model, and make identification from video.Methods: Cars were detected using the You Only Look Once (YOLO) v4 detector. The YOLO output was then used for classification in the next step. Colors were classified using the k-Nearest Neighbors (kNN) algorithm, whereas car models and makes were identified with a single-shot detector (SSD). Finally, license plates were detected using the OpenCV library and Tesseract-based optical character recognition. For the sake of simplicity and speed, the subsystems were run on an embedded Raspberry Pi computer.Results: A camera was mounted on the inside of the windshield to monitor cars in front of the camera. The system processed the camera’s video feed and provided information on the color, license plate, make, and model of the observed car. Knowing the license plate number provides access to details about the car owner, roadworthiness, car or license place reports missing, as well as whether the license plate matches the car. Car details were saved to file and displayed on the screen. The system was tested on real-time images and videos. The accuracies of car detection and car model classification (using 8 classes) in images were 88.5% and 78.5%, respectively. The accuracies of color detection and full license plate recognition were 71.5% and 51.5%, respectively. The system operated at 1 frame per second (1 fps).Conclusion: These results show that running standard machine learning algorithms on low-cost hardware may enable the automatic detection and classification of cars in traffic. However, there is significant room for improvement, primarily in license plate recognition. Accordingly, potential improvements in the future development of the system are proposed.","PeriodicalId":422483,"journal":{"name":"St open","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114721517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Dr Ivan Šreter Contest for New Croatian Words by the Jezik journal 由Jezik杂志主办的Ivan博士Šreter克罗地亚新词汇大赛

St open Pub Date : 2022-08-11 DOI: 10.48188/so.3.8

Sanda Ham

引用次数: 0

The relationship between Reverend Frane Bulić and Reverend Ivan Delalle 弗兰·布里奇牧师和伊万·德拉莱牧师之间的关系

St open Pub Date : 2022-08-11 DOI: 10.48188/so.3.9

Ljubo Jermelić, Josip Dukić

{"title":"The relationship between Reverend Frane Bulić and Reverend Ivan Delalle","authors":"Ljubo Jermelić, Josip Dukić","doi":"10.48188/so.3.9","DOIUrl":"https://doi.org/10.48188/so.3.9","url":null,"abstract":"Objective: To illustrate the relationship between two histo-rians and priests, Reverend Frane Bulić and Reverend Ivan Delalle, based on a study of their correspondence archived at the library of the Catholic Faculty of Theology.Methods: Part of Revd Bulić’s legacy, preserved at the li-brary of the Catholic Faculty of Theology at the University of Split, includes his correspondence with Revd Delalle. This comprises 43 postcards and 19 letters. Beyond the corre-spondence, the library also conserves Revd Bulić’s Pro me-moria (refer to reference number 68) on 10 pages. This text illustrates the relationship between Bulić and Delalle.Correspondence: The author covers topics concerning the interpretation of the Good Shepherd sarcophagus, the ques-tion of Kairos’ discovery, Revd Delalle’s use of his doctoral title, and the issue of Delalle’s political involvement. Conclusion: Based on their correspondence, Bulić and Delalle never managed to resolve their disagreements. The last record of their relationship was made 19 days before Revd Bulić’s death. Revd Bulić still appeared to be invested in Delalle. The questions of why Delalle never printed and published his doctoral dissertation and why he misappropriated the discovery of the Trogir Kairos re-main unresolved.","PeriodicalId":422483,"journal":{"name":"St open","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130838273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Online safety awareness of elementary school students from Croatian rural and urban areas 克罗地亚农村和城市地区小学生的网络安全意识

St open Pub Date : 2022-07-15 DOI: 10.48188/so.3.7

Anamarija Baraba, Suzana Tomaš

{"title":"Online safety awareness of elementary school students from Croatian rural and urban areas","authors":"Anamarija Baraba, Suzana Tomaš","doi":"10.48188/so.3.7","DOIUrl":"https://doi.org/10.48188/so.3.7","url":null,"abstract":"Objective: To examine the factors related to the use of in-ternet and the awareness of online safety among students from one elementary school in a village and one in a city.Participants and methods: Participants in the research (n=119) were first to fourth graders attending “Braća Ribar” Elementary School in the village of Posedarje (n=53), and “Šimun Kožičić Benja” Elementary School in the city of Zadar (n=66). An 18-item questionnaire in Croatian was cre-ated and distributed among participants.Results: Six (11.3%) students attending school in the village and 16 (24.2%) students attending school in the city were not sufficiently informed about what the Internet is and what purposes it serves. Students from urban area were bet-ter informed about the concept of personal data compared with students from rural area (71,2% vs. 47.2%, P=0.038). There was no statistically significant difference with regard to other aspects of online safety. Conclusion: Elementary school students from rural and ur-ban areas know what the Internet is and frequently use dif-ferent Internet applications. However, they still lack aware-ness and proper understanding of online safety. Results from this study highlight the need for an appropriate edu-cational intervention.","PeriodicalId":422483,"journal":{"name":"St open","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115454647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heterogeneous catalytic transesterification of waste vegetable oil using modified natural zeolite 改性天然沸石催化废植物油多相酯交换反应

St open Pub Date : 2022-07-05 DOI: 10.48188/so.3.6

Ema Kostešić, Branka Andričić

{"title":"Heterogeneous catalytic transesterification of waste vegetable oil using modified natural zeolite","authors":"Ema Kostešić, Branka Andričić","doi":"10.48188/so.3.6","DOIUrl":"https://doi.org/10.48188/so.3.6","url":null,"abstract":"Objectives: In the search of an economical process for bio-diesel synthesis, waste cooking oil was analyzed as a poten-tial feedstock. The influence of different concentrations and granulations of the zeolite catalyst on the yield and quality of the final product was also investigated.Methods: The pretreatment of waste oil was carried out using the simple processes of filtration and drying with CaCl2, after which its physicochemical properties were de-termined. Transesterification of waste oil with methanol was carried out using zeolite clinoptilolite as the catalyst. Its preparation included modification with sodium hydrox-ide, drying at 105°C and calcination at 300°C. As for the waste oil, the density, acid and peroxide number, moisture content, kinematic viscosity and flash point of the obtained biodiesels were determined by standardized methods. After the synthesis, the Fourier transformation infrared (FT-IR) spectra of the obtained biodiesel and waste cooking oil were recorded and compared.Results: The process of transesterification with methanol was found to be suitable due to the high conversion of waste oil esters under relatively mild reaction conditions. Moreover, modified natural clinoptilolite proved to be a suitable catalyst for the process of biodiesel production. At each catalyst concentration and granulation, the biodiesel yield was satisfactory and its quality parameters met the prescribed standards. Conclusion: The basic characteristics of the biodiesel ob-tained from waste cooking oil enable its potential appli-cation. Moreover, the properties of clinoptilolite, such as concentration and particle size, can be adjusted for each transesterification process to attain high quality product. The performed experiment presents an example of the efficient linking of biofuel production and waste oil dis-posal processes.","PeriodicalId":422483,"journal":{"name":"St open","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117101916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anthropological individualization of relics from sarcophagus stored in Vodnjan monastery, Vodnjan, Croatia 克罗地亚Vodnjan修道院石棺文物的人类学个体化研究

St open Pub Date : 2022-06-24 DOI: 10.48188/so.3.5

Ž. Bašić, S. Janković, Š. Anđelinović, D. Primorac, K. Vilović, D. Kero, Snježana Štambuk, Frane Mihanović, Luka Ursić, Marijan Jelenić, I. Kružić

{"title":"Anthropological individualization of relics from sarcophagus stored in Vodnjan monastery, Vodnjan, Croatia","authors":"Ž. Bašić, S. Janković, Š. Anđelinović, D. Primorac, K. Vilović, D. Kero, Snježana Štambuk, Frane Mihanović, Luka Ursić, Marijan Jelenić, I. Kružić","doi":"10.48188/so.3.5","DOIUrl":"https://doi.org/10.48188/so.3.5","url":null,"abstract":"Aim: To develop a methodology for the estimation of the preservation of human skeletal remains – the relics in the Vodnjan assembly; to estimate the minimum number of individuals (MNI), sex, and age; to evaluate the physical state of their remains, and to individualize the remains to verify the list of saints allegedly buried at the monastery. Methods: Standard crime scene investigation and forensic anthropology methods were used, including trace evidence marking, photography, minimum number of individuals (MNI) estimation, sex, age, stature estimation, pathological and traumatic changes examination, individuation, and individualization by the comparison to the biography. Results: The total sample of the bones in the Vodnjan relic collection was very poorly preserved. The MNI in the sarcophagus was twenty-two. Of those, three were female, twelve were male, and seven were subadults. Conclusion: The forensic approach to the documentation and analysis of relics was appropriate for this kind of skeletal material. The final identification was not possible because of the poor preservation of skeletal material and the lack of hagiographical (antemortem) data. However, the forensic anthropology approach enabled us to create osteobiographies, and after the comparison with the existing antemortem data, we could not exclude that the remains belonged to the named saints.","PeriodicalId":422483,"journal":{"name":"St open","volume":"311 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123251276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The relationship of public investments in science and scientometric indicators from the perspective of Croatian universities 从克罗地亚大学的角度看公共科学投资与科学计量指标的关系

St open Pub Date : 2022-05-05 DOI: 10.48188/so.3.4

Miroslav Rajter

{"title":"The relationship of public investments in science and scientometric indicators from the perspective of Croatian universities","authors":"Miroslav Rajter","doi":"10.48188/so.3.4","DOIUrl":"https://doi.org/10.48188/so.3.4","url":null,"abstract":"Aim: This study addresses the hypothesis that the invest-ments in science are positively correlated with the indica-tors of productivity and performance of the universities. Methods: A cross-sectional design was used with the datafrom 27 EU countries. The percentage of GDP invested in science in higher education in 2019 and investments ex-pressed as €/inhabitant were used. The criterion variables were total number of publications in Web of Science for 2020; number of publications categorized as article, review or note (ARN); change in the number of publications com-pared to 2016 in total and for Organisation for Economic Co-operation and Development (OECD) research areas; productivity per inhabitant; productivity per researcher; productivity per researcher in higher education system; and number of Academic Ranking of World Universities (ARWU) TOP1000 universities per inhabitant. Descriptive data and Pearson and Spearman correlations were calculat-ed. Additionally, partial Spearman correlations for detailed examinations were used.Results: Most of the productivity indicators were positivelycorrelated to the investment in science. The absolute invest-ment in science in €/inhabitant is more important than in-vestment expressed as the percentage of GDP. Unexpectedly, the correlations between investments and the growth rate in productivity were negative indicating that the less devel-oped countries have achieved a larger growth in productiv-ity in the examined 5-year period. Conclusion: The results indicate that the investments inscience as the percentage of GDP is important, but the ab-solute amount of money also has an important role in the prediction of scientific productivity. However, since the absolute amount of investments is limited in the less developed countries, they should be more focused on buildingthe strategies that capitalize on specific strengths and potentials. This further accentuates the need for science policychange in Croatia with the strategic focus on aligning the re-sources to the expected results.","PeriodicalId":422483,"journal":{"name":"St open","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126840628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ottoman religious architecture in Croatia 克罗地亚的奥斯曼宗教建筑

St open Pub Date : 2022-04-28 DOI: 10.48188/so.3.3

Monika Gusić

{"title":"Ottoman religious architecture in Croatia","authors":"Monika Gusić","doi":"10.48188/so.3.3","DOIUrl":"https://doi.org/10.48188/so.3.3","url":null,"abstract":"Objective: To provide a description and analysis of built, surviving, and lost Ottoman religious monuments in Croatia within the historical and sociopolitical context. Methods: Based on the analysis of relevant published sources, historical maps, online sources, as well as site analysis, we provide a description of Ottoman architectural, religious, and cultural heritage in the contemporary Croatian regions of the Dalmatian hinterland and Slavonia. This includes the art historical interpretation of the remains of the three surviving 16th-century domed mosques in three Croatian towns: Klis (today, the Catholic Church of St. Vitus in the Fortress), Drniš (now incorporated into the Catholic Church of St. Anthony held by the Franciscans), and Đakovo (today, the Catholic Church of All Saints). Results: The period of Ottoman rule saw the construction of a great number of Ottoman religious buildings in what is now the territory of the Republic of Croatia. There were two methods of mosque establishment: from the ground up, or by repurposing an older building, generally of Christian origin. With cessation of Ottoman rule these objects decayed and became less interesting for reutilization for Christian religious purposes. Many such converted objects perished in spite of their new utilization. The site analysis revealed the continuity of these sacred places in spite of religious conversion of the sacral site. Conclusion: The introduction of Ottoman architectural and urbanistic features was the defining feature of urban development in Croatia during the Ottoman era. In the settlements, the Ottomans built both sacral and utilitarian profane buildings, but Ottoman religious buildings were the most prominent. In the territory of present day Croatia, only three such Ottoman places of worship remain in existence as structures, albeit reconverted into Catholic churches. Today, due to the conversion and renovation works, they represent a fusion of several stylistic periods.","PeriodicalId":422483,"journal":{"name":"St open","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129001612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0