Investigation of possible causes for appearance of a crack in the welded joint of the ship winch frame

Ship winches are one of the most important parts of the ship equipment since they perform the most responsible tasks on various ships. In the majority of cases, the ship winches are welded structures. All the necessary calculations according to required standards, that have to be done prior to actual execution of the structure, should also include the verification by the finite elements method. For the high reliability requirements to be met, the welded joints integrity of all the parts must be examined before they are assembled into the winch. After all the tests are conducted and parts are assembled into the winch, the factory acceptance test (FAT) must be done. During those tests all the flaws, which can appear during manufacturing, must show. An appearance of a very unusual crack in the ship winch frame, which happened during the FAT, is described in this paper. The simulation by the finite elements method was performed to obtain the stresses at which the crack appeared. The possible causes for that crack appearance are considered. Some measures for reducing appearance of such cracks to a minimum are proposed, as well as certain directions for further research of this problem.

In Memoriam: Very Rev. Dr. Mateja Matejic

Special report dedicated to the memory of Professor Mateja Matejic (1924-2018) and his legacy of the Hilandar Research Library (HRL) and the Resource Center for Medieval Slavic Studies (RCMSS) at The Ohio State University.A four-page Special Report, inserted into Cyrillic Manuscript Heritage, v42 (October 2018), in memory of the Very Rev. Dr. Mateja Matejic. It includes an obituary written by Professor Predrag Matejic, his elder son, that was published in the local newspaper The Columbus Dispatch on July 30, 2018, (https://www.legacy.com/obituaries/dispatch/obituary.aspx?n=mateja-matejic&pid=189740357&fhid=8700) and on the website of the Rutherford Funeral Homes and Crematories, Columbus, Ohio (https://www.rutherfordfuneralhomes.com/obituaries/Mateja-Matejic/#!/Obituary), pp. I-II; Condolences - excerpts from comments regarding Father Matejic's legacy of the Hilandar Research Library and the Resource Center for Medieval Slavic Studies from researchers who have used the HRL/RCMSS resources, i.e., from Mirjana Živojinović, Adelina Angusheva, Svetlana Kujumdzhieva, and Enrique Santos Marinas, p. III; a list of donors who made contributions to the Hilandar Endowment Funds in memory of Father Matejic, p. IV. The Special Report is illustrated with photographs of Father Matejic by M.A. Johnson, Tatyana Nestorova-Matejic, Predrag Matejic, Walt Craig, Helene Senecal, and Pam McClung

Impact of COVID pandemic on attitude and prevalence of plant-based food products consumption in Serbia

COVID pandemic influence on eating behavior and dietary habits with respect to various plant-based foods in Serbia were estimated by an anonymous questionnaire. Most examinees agree that fruits and vegetables contribute to strengthening immunity and that herbal medicines and natural products have beneficial effects on health. Around 55% of examinees consider their diet balanced, and 4% have started to drink herbal teas more often when the pandemic started. Garlic and ginger were the most frequently reported newly included plants in examinees’ diet. The attitudes toward plant-based food products are not strongly dependent on the education level. The age and previous dietary habits of examinees have great influence in the current frequency of consuming fruits, vegetables, herbal teas, spices, and dietary supplements. There was a significant shift toward greater use of herbal teas and dietary supplements, especially among the population that has already consumed them occasionally. Somewhat concerning is the fact that around half of respondents use dietary supplements without the recommendation of an expert. People with good dietary habits and the elderly were most prone to improving their diet. Roughly 15% of all respondents now have the same habits as before the pandemic, although they improved their diets temporarily at the beginning of COVID pandemic