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Corrigendum To “Experimental Investigation and Analytical Verification of Buckling of Functionally Graded Carbon Nanotube-Reinforced Sandwich Beams” [Heliyon Volume 10, Issue 8, April 2024, Article E28388](s2405844024044190)(10.1016/J.heliyon.2024.e28388)
No full textIn this article, reference [52] was included in error: [52] E. Payton, J. Khubchandani, A. Thompson, J.H. Price, Parents’ expectations of high schools in firearm violence prevention, J. Community Health 42 (2017) 1118–1126. The correct version of the reference is as below: [52] Senjanović, I., Vladimir, N., Hadžić, N., ; Tomić, M. (2016). New first order shear deformation beam theory with in-plane shear influence. Engineering Structures, 110, 169-183. https://doi.org/10.1016/j.engstruct.2015.11.032 The authors apologize for the error. © 2025Ministry of Science and Higher Education of the Russian Federation; Najran University, NU, (NU/RG/SERC/12/11); Najran University, NU; Advanced Digital Technologies, (075-15-2022-312
Proton Reconstruction with the TOTEM Roman Pot Detectors for High-Β* LHC Data
No full textAl Kadhim, Ali/0000-0003-3490-8407; Mendizabal, Mikel/0000-0002-6506-5177; Legger, Federica/0000-0003-1400-0709; Tiras, Emrah/0000-0002-5628-7464; Kunnawalkam Elayavalli, Raghav/0000-0002-9202-1516; Golf, Frank/0000-0003-3567-9351; Pasztor, Gabriella/0000-0003-0707-9762; Forthomme, Laurent/0000-0002-3302-336X; Gutsche, Oliver/0000-0002-8015-9622; Csanad, Mate/0000-0002-3154-6925; Mitra, Soureek/0000-0002-3060-2278; Singh, Jasbir/0000-0001-9029-2462; Krintiras, Georgios Konstantinos/0000-0002-0380-7577; Felcini, Marta/0000-0002-2051-9331; Papageorgakis, Christos/0000-0003-4548-0346; Alverson, George/0000-0001-6651-1178; Rebello Teles, Patricia/0000-0001-9029-8506; Snoeys, Walter/0000-0003-3541-9066; Ferrara, Nicola/0009-0002-1824-4145; Reichert, Joseph/0000-0003-2110-8021; Sharma, Ashish/0000-0002-0688-923X; Grunewald, Martin/0000-0002-5754-0388; Vami, Tamas Almos/0000-0002-0959-9211; Azzi, Patrizia/0000-0002-3129-828X; Jin, Weijie/0009-0009-8976-7702; Cardini, Andrea/0000-0003-1803-0999; Heredia De La Cruz, Ivan/0000-0002-8133-6467; Ahmad, Ashfaq/0000-0002-4770-1897; Colaleo, Anna/0000-0002-0711-6319; Diaz, Daniel/0000-0001-6834-1176; D'Enterria, David/0000-0002-5754-4303; Sandro, Fonseca De Souza/0000-0001-7830-0837; Evdokimov, Olga/0000-0002-1250-8931; D'Anzi, Brunella/0000-0002-9361-3142; You, Zhengyun/0000-0001-8324-3291; Fouz Iglesias, Maria Cruz/0000-0003-2950-976X; Lasaosa Garcia, Clara/0000-0003-2726-7111; Perez Adan, Danyer/0000-0003-3416-0726; Bortignon, Pierluigi/0000-0002-5360-1454; Duarte, Javier Mauricio/0000-0002-5076-7096; Pradhan, Raghunath/0000-0001-7000-6510; Whalen, Kathleen/0000-0002-9383-8763; Gomez Espinosa, Tirso Alejandro/0000-0002-9443-7769; De Moor, Alexandre/0000-0001-5964-1935; Wilson, Jonathan/0000-0002-5672-7394; Lu, Meng/0000-0002-6999-3931; Safdari, Murtaza/0000-0001-8323-7318; Hall, Geoffrey/0000-0002-6299-8385; Grandi, Claudio/0000-0001-5998-3070; Mitselmakher, Guenakh/0000-0001-5745-3658; Sculac, Ana/0000-0001-7938-7559; Ligabue, Franco/0000-0002-1549-7107; Yagil, Avi/0000-0002-6108-4004; Pesaresi, Mark/0000-0002-9759-1083; Mora Herrera, Maria Clemencia/0000-0003-3915-3170; Benaglia, Andrea Davide/0000-0003-1124-8450; /0000-0002-6047-4211; Murillo Quijada, Javier Alberto/0000-0003-4933-2092; Ruiz, Jose/0000-0002-3306-0363; Moureaux, Louis/0000-0002-2310-9266; Bruschini, Davide/0000-0001-7248-2967; Hernandez Calama, Jose Maria/0000-0001-6436-7547; Smith, Nicholas/0000-0002-0324-3054; Navarro-Tobar, Alvaro/0000-0003-3606-1780; Mcginnis, Michael/0000-0002-9833-6316; Tumasyan, Armen/0009-0000-0684-6742; Klyukhin, Vyacheslav/0000-0002-8577-6531; Selvaggi, Michele/0000-0002-5144-9655; Ngadiuba, Jennifer/0000-0002-0055-2935; Chou, Pin-Chun/0000-0002-5842-8566; Karneyeu, Anton/0000-0001-9983-1004; Ventura, Sandro/0000-0002-8938-2193; De La Cruz Burelo, Eduard/0000-0002-7469-6974; Paulini, Manfred/0000-0002-6714-5787; Delgado Peris, Antonio/0000-0002-8511-7958; Leonidou, Christos/0009-0008-6993-2005; Trevisani, Nicolo/0000-0002-5223-9342; Jabeen, Shabnam/0000-0002-0155-7383; Diotalevi, Tommaso/0000-0003-0780-8785; Ferencek, Dinko/0000-0001-9116-1202; Lami, Stefano/0000-0001-9492-0147; Kontaxakis, Pantelis/0000-0002-4860-5979; Tytgat, Michael/0000-0002-3990-2074; Melo Da Costa, Eliza/0000-0002-5016-6434; Yazgan, Efe/0000-0001-5732-7950; Zhang, Yousen/0000-0002-6812-761X; Ivanov, Andrew/0000-0002-9270-5643; Santpur, Sai Neha/0000-0001-6467-9970; Holmes, Tova/0000-0002-3959-5174; Wilson, Graham/0000-0003-0917-4763; Longo, Luigi/0000-0002-2357-7043; Kyberd, Paul/0000-0002-7353-7090; Sahasransu, Abanti Ranadhir/0000-0003-1505-1743; Vischia, Pietro/0000-0002-7088-8557; Vannerom, David/0000-0002-2747-5095; Giammanco, Andrea/0000-0001-9640-8294; Heath, Helen/0000-0001-6576-9740; Usai, Emanuele/0000-0001-9323-2107; Chatterjee, Suman/0000-0003-2660-0349; Hahn, Kristian/0000-0001-7892-1676; Lipton, Ronald/0000-0002-6665-7289; Dozen, Candan/0000-0002-4301-634X; Calderon Tazon, Alicia/0000-0002-7205-2040; Zhang, Licheng/0000-0001-7947-9007; Lai, Yihui/0000-0002-7795-8693; Portales, Louis/0000-0002-9860-9185; Garcia, Francisco/0000-0002-4023-7964; Giacomelli, Paolo/0000-0002-6368-7220; Schwandt, Joern/0000-0002-0052-597X; Barroso Ferreira, Mapse/0000-0003-3904-0571; Mrenna, Stephen/0000-0001-8731-160X; Matorras, Francisco/0000-0003-4295-5668; Bhowmik, Sandeep/0000-0003-1260-973X; Geurts, Frank/0000-0003-2856-9090; Wittich, Peter/0000-0002-7401-2181; Moon, Chang-Seong/0000-0001-8229-7829; Gerosa, Raffaele/0000-0001-8359-3734; Ecklund, Karl/0000-0002-6976-4637; Tapper, Alexander/0000-0003-4543-864X; Cussans, David/0000-0001-8192-0826The TOTEM Roman pot detectors are used to reconstruct the transverse momentum of scattered protons and to estimate the transverse location of the primary interaction. This paper presents new methods of track reconstruction, measurements of strip-level detection efficiencies, cross-checks of the LHC beam optics, and detector alignment techniques, along with their application in the selection of signal collision events. The track reconstruction is performed by exploiting hit cluster information through a novel method using a common polygonal area in the intercept-slope plane. The technique is applied in the relative alignment of detector layers with mu m precision. A tag-and-probe method is used to extract strip-level detection efficiencies. The alignment of the Roman pot system is performed through time-dependent adjustments, resulting in a position accuracy of 3 mu m in the horizontal and 60 mu m in the vertical directions. The goal is to provide an optimal reconstruction tool for central exclusive physics analyses based on the high-beta* data-taking period at root s = 13 TeV in 2018.We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS and TOTEM institutes for their contributions to the success of the common CMS-TOTEM effort. In addition, we gratefully acknowledge the computing centres and personnel of the Worldwide LHC Computing Grid and other centres for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC, the CMS and TOTEM detectors, and the supporting computing infrastructure provided by the following funding agencies: SC (Armenia), BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS, and FAPESP (Brazil); MES and BNSF (Bulgaria); CERN; CAS, MoST, and NSFC (China); MINCIENCIAS (Colombia); MSES and CSF (Croatia); RIF (Cyprus); SENESCYT (Ecuador); ERC PRG, RVTT3 and MoER TK202 (Estonia); Academy of Finland, Magnus Ehrnrooth Foundation, MEC, HIP, and Waldemar von Frenckell Foundation (Finland); CEA and CNRS/IN2P3 (France); SRNSF (Georgia); BMBF, DFG, and HGF (Germany); GSRI (Greece); NKFIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); MES (Latvia); LMTLT (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MOS (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MES and NSC (Poland); FCT (Portugal); MESTD (Serbia); MCIN/AEI and PCTI (Spain); MOSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); MST (Taipei); MHESI and NSTDA (Thailand); TUBITAK and TENMAK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (U.S.A.). Individuals have received support from the Marie-Curie programme and the European Research Council and Horizon 2020 Grant, contract Nos. 675440, 724704, 752730, 758316, 765710, 824093, 101115353, 101002207, and COST Action CA16108 (European Union); the Leventis Foundation; the Alfred P. Sloan Foundation; the Alexander von Humboldt Foundation; the Science Committee, project no. 22rl-037 (Armenia); the Belgian Federal Science Policy Office; the Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); the F.R.S.-FNRS and FWO (Belgium) under the "Excellence of Science - EOS" - be.h project n. 30820817; the Be.ing Municipal Science ; Technology Commission, No. Z191100007219010 and Fundamental Research Funds for the Central Universities (China); the Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the Shota Rustaveli National Science Foundation, grant FR-22-985 (Georgia); the Deutsche Forschungsgemeinschaft (DFG), among others, under Germany's Excellence Strategy -EXC 2121 "Quantum Universe" - 390833306, and under project number 400140256 -GRK2497; the Hellenic Foundation for Research and Innovation (HFRI), Project Number 2288 (Greece); the Hungarian Academy of Sciences, the New National Excellence Program - UNKP, the NKFIH research grants K 131991, K 133046, K 138136, K 143460, K 143477, K 146913, K 146914, K 147048, 2020-2.2.1-ED-2021-00181, and TKP2021-NKTA-64, and 2021-4.1.2-NEMZ_KI-202400036 (Hungary); the Council of Science and Industrial Research, India; ICSC -National Research Centre for High Performance Computing, Big Data and Quantum Computing and FAIR - Future Artificial Intelligence Research, funded by the NextGenerationEU program (Italy); the Latvian Council of Science; the Ministry of Education and Science, project no. 2022/WK/14, and the National Science Centre, contracts Opus 2021/41/B/ST2/01369 and 2021/43/B/ST2/01552 (Poland); the Fundacao para a Ciencia e a Tecnologia, grant CEECIND/01334/2018 (Portugal); the National Priorities Research Program by Qatar National Research Fund; MCIN/AEI/10.13039/501100011033, ERDF "a way of making Europe", and the Programa Estatal de Fomento de la Investigacion Cientifica y Tecnica de Excelencia Maria de Maeztu, grant MDM-2017-0765 and Programa Severo Ochoa del Principado de Asturias (Spain); the Chulalongkorn Academic into Its 2nd Century Project Advancement Project, and the National Science, Research and Innovation Fund via the Program Management Unit for Human Resources ; Institutional Development, Research and Innovation, grant B39G670016 (Thailand); the Kavli Foundation; the Nvidia Corporation; the SuperMicro Corporation; the Welch Foundation, contract C-1845; and the Weston Havens Foundation (U.S.A.).FWF; FNRS; FWO (Belgium); CNPq; CAPES; FAPERJ; FAPERGS; FAPESP (Brazil); BNSF (Bulgaria); MoST; NSFC (China); CSF (Croatia); RIF (Cyprus); SENESCYT (Ecuador); ERC PRG [MoER TK202]; Academy of Finland; Magnus Ehrnrooth Foundation; MEC; Waldemar von Frenckell Foundation; CEA; CNRS/IN2P3 (France); SRNSF; BMBF; HGF (Germany); NKFIH (Hungary); DAE; DST; IPM; SFI (Ireland); INFN (Italy); NRF (Republic of Korea); MES (Latvia); MOE; UM (Malaysia); BUAP; CONACYT; UASLP-FAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); FCT (Portugal); MESTD (Serbia); PCTI (Spain); MOSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); NSTDA; TUBITAK; NASU; DOE; NSF; Marie-Curie programme; European Research Council; Horizon 2020 Grant [675440, 724704, 752730, 758316, 765710, 824093, 101115353, 101002207]; COST Action [CA16108]; Leventis Foundation; Alfred P. Sloan Foundation; Alexander von Humboldt Foundation; Science Committee [22rl-037]; Belgian Federal Science Policy Office; Fonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium); FWO (Belgium) under the "Excellence of Science - EOS [30820817]; Be.ing Municipal Science ; Technology Commission [Z191100007219010]; Fundamental Research Funds for the Central Universities (China); Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; Shota Rustaveli National Science Foundation [FR-22-985]; Deutsche Forschungsgemeinschaft (DFG) [EXC 2121, 390833306, 400140256 -GRK2497]; Hellenic Foundation for Research and Innovation (HFRI) [2288]; Hungarian Academy of Sciences [K 131991, K 133046, K 138136, K 143460, K 143477, K 146913, K 146914, K 147048, 2020-2.2.1-ED-2021-00181, TKP2021-NKTA-64, 2021-4.1.2-NEMZ_KI-202400036]; Council of Science and Industrial Research, India - NextGenerationEU program (Italy); Latvian Council of Science; Ministry of Education and Science [2022/WK/14]; National Science Centre [Opus 2021/41/B/ST2/01369, 2021/43/B/ST2/01552]; Fundacao para a Ciencia e a Tecnologia [CEECIND/01334/2018]; National Priorities Research Program by Qatar National Research Fund; ERDF "a way of making Europe [MDM-2017-0765]; Programa Severo Ochoa del Principado de Asturias (Spain); National Science, Research and Innovation Fund via the Program Management Unit for Human Resources ; Institutional Development, Research and Innovation [B39G670016]; Kavli Foundation; Nvidia Corporation; SuperMicro Corporation; Welch Foundation [C-1845]; Weston Havens Foundation (U.S.A.
Involution-Based Harmonynet: an Efficient Hyperspectral Imaging Model for Automatic Detection of Neonatal Health Status
No full textBackground and Objective: Neonatal health is critical for early infant care, where accurate and timely diagnoses are essential for effective intervention. Traditional methods such as physical exams and laboratory tests may lack the precision required for early detection. Hyperspectral imaging (HSI) provides non-invasive, detailed analysis across multiple wavelengths, making it a promising tool for neonatal diagnostics. This study introduces HarmonyNet, an involution-based HSI model designed to improve the accuracy and efficiency of classifying neonatal health conditions. Methods: Data from 220 neonates were collected at the Neonatal Intensive Care Unit of Sel ; ccedil;uk University, comprising 110 healthy infants and 110 diagnosed with conditions such as respiratory distress syndrome (RDS), pneumothorax (PTX), and coarctation of the aorta (AORT). The HarmonyNet model incorporates involution kernels and residual blocks to enhance feature extraction. The model's performance was evaluated using metrics such as overall accuracy, precision, recall, and area under the curve (AUC). Ablation studies were conducted to optimize hyperparameters and network architecture. Results: HarmonyNet achieved an AUC of 98.99%, with overall accuracy, precision and recall rates of 90.91%, outperforming existing convolution-based models. Its low parameter count and computational efficiency proved particularly advantageous in low-data scenarios. Ablation studies further demonstrated the importance of involution layers and residual blocks in improving classification accuracy. Conclusions: HarmonyNet represents a significant advancement in neonatal diagnostics, offering high accuracy with computational efficiency. Its non-invasive nature can contribute to improved health outcomes and more efficient medical interventions. Future research should focus on expanding the dataset and exploring the model's potential in multi-class classification tasks.This study was supported by Scientific and Technological Research Council of Turkey (TUBITAK) under the Grant Number 122E021. The authors thank to TUBITAK for their supports.Scientific and Technological Research Council of Turkey (TUBITAK) [122E021]; TUBITA
Development of the Middle Devonian-Mississippian Carbonate Platform in Zonguldak Terrane (Nw Anatolia, Türkiye) With Special Emphasis on the Devonian-Carboniferous Boundary
No full textThe Zonguldak Terrane in the northwestern Türkiye is one of the continental micro-plates representing the eastern prolongation of the Variscan belt in Eastern Europe. Its distinguishing feature from the neighboring Variscan terranes (e.g. Istanbul Terrane) is the presence of a well-developed Middle Devonian–Mississippian carbonate platform. This platform carbonate succession, named as Yılanlı Formation, was sampled in detail for conodonts and foraminifera along six measured sections for a better understanding of its geological evolution. In the studied sections, the lowermost limestone bands alternating with green-yellow shales and marls are dated by conodonts to latest Emsian–late Eifelian. This interval is interpreted as the onset of the carbonate platform deposition. The following limestone-shale intercalations yielded an Eifelian–lower Givetian succession, conformably overlain by upper Givetian–? lower middle Frasnian strata. This series is covered by shallow marine, medium to thick-bedded grey limestones with five to twenty cm thick K-bentonite bands. Scarce foraminifera findings only suggest a Late Devonian age. The upper part of this thick-bedded carbonate package with cm-thick black chert bands, which are named as the “transitional D-C beds” as they yielded foraminifera (including the new taxon: Laxoendothyra parakosvensis gracilis subsp. nov.) ranging from latest Famennian to earliest Tournaisian. Upwards the cherty limestones are replaced by cherts and nodular limestones with conodonts of the Siphonodella mehli Zone indicating a change from platform to slope conditions during the early Tournaisian. The following package of dark grey, thick-bedded to massive limestone with conodonts of the Si. isosticha Zone marks the restoration back to shallow platform conditions during the middle Tournaisian, frequently observed in Variscan terranes. The uppermost part of the Yılanlı Formation comprises a thick package of grey to pink nodular limestones alternating with shales and mudstones. The Yılanlı Formation is transitional to the Alacaağzı Formation, which comprises siltstones and plant-bearing sandstones with calcarenite nodules including early Serpukhovian conodonts. This change from carbonate platform to deltaic and fluvial conditions is typical along the Variscan belt and ascribed to the drowning of the Middle Devonian–Mississippian carbonate platform. Biostratigraphic data recovered from the studied sections of the Yılanlı Formation from the Zonguldak Terrane in NW Anatolia suggest that the Yılanlı Formation was deposited during latest Emsian-late Eifelian to late Viséan. © The Author(s), under exclusive licence to Senckenberg Gesellschaft für Naturforschung 2025.Turkish Scientific Council; Bulgarian Council of Scientific Research; Bulgarian Academy of Sciences, BAS, (NZ-1404); Bulgarian Academy of Sciences, BAS; Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, TÜBİTAK, (102Y157); Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, TÜBİTA
Search for New Resonances Decaying To Pairs of Merged Diphotons in Proton-Proton Collisions at (formula Presented
No full textA search is presented for an extended Higgs sector with two new particles, (Formula presented) and (Formula presented), in the process (Formula presented). Novel neural networks classify events with diphotons that are merged and determine the diphoton masses. The search uses LHC proton-proton collision data at (Formula presented) collected with the CMS detector, corresponding to an integrated luminosity of (Formula presented). No evidence of such resonances is seen. Upper limits are set on the production cross section for (Formula presented) between 300 and 3000 GeV and (Formula presented) between 0.5% and 2.5%, representing the most sensitive search in this channel. © 2025 CERN, for the CMS Collaboration.Ministry of Business, Innovation and Employment, MBIE; Ministry of Education and Science, MES; Benemérita Universidad Autónoma de Puebla, BUAP; NSC; Fundação para a Ciência e a Tecnologia, FCT; Department of Atomic Energy, Government of India, DAE; PCTI; National Academy of Sciences of Ukraine, NASU; National Science and Technology Development Agency, สวทช; National Research Foundation of Korea, NRF; MSES; Ministerio de Educación, Cultura y Deporte, MECD; National Science Foundation, NSF; Institut National de Physique Nucléaire et de Physique des Particules, IN2P3; Science and Technology Facilities Council, STFC; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, CINVESTAV; Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, FAPERJ; Ministerio de Ciencia e Innovación, MCIN; Universiti Malaya, UM; Ministry of Science and Technology, Taiwan, MOST; Ministry of Science,Technology and Research, MoSTR; Hispanics in Philanthropy, HIP; Instituto Nazionale di Fisica Nucleare, INFN; Secretaría de Educación Pública, SEP; Austrian Science Fund, FWF; Department of Science and Technology, Ministry of Science and Technology, India, DST; Consejo Nacional de Humanidades, Ciencias y Tecnologías, Conahcyt; Centre National de la Recherche Scientifique, CNRS; Bundesministerium für Bildung und Forschung, BMBF; Fonds Wetenschappelijk Onderzoek, FWO; Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, TÜBİTAK; LMTLT; Helmholtz-Gemeinschaft, HGF; Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA; Research Council of Finland, AKA; Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq; Pakistan Atomic Energy Commission, PAEC; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, CAPES; MSIP; Türkiye Enerji, Nükleer ve Maden Araştırma Kurumu, TENMAK; Deutsche Forschungsgemeinschaft, DFG; Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFIH; Ministry of Education - Singapore, MOE; Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja, MPNTR; Science Foundation Ireland, SFI; U.S. Department of Energy, USDOE; Fundação de Amparo à Pesquisa do Estado de São Paulo, FAPESP; Cosmetic Surgery Foundation, CSF; Agencia Estatal de Investigación, AEI; General Secretariat for Research and Innovation, GSRI; Bulgarian National Science Fund, BNSF; Direktion für Entwicklung und Zusammenarbeit, DEZA; Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie, BMBWF; Ministerio de Ciencia, Tecnología e Innovación, Minciencias; Maryland Ornithological Society, MOS; Chinese Academy of Sciences, CAS; Ministry of Higher Education, Science, Research and Innovation, Thailand, MHESRI; Fonds De La Recherche Scientifique - FNRS, FNRS; Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul, FAPERGS; Shota Rustaveli National Science Foundation, SRNSF; Institute for Research in Fundamental Sciences, IPM; Laboratorio Nacional de Supercómputo del Sureste de Mexico, LNS; CERN; Secretaría de Educación Superior, Ciencia, Tecnología e Innovación, SENESCYT; Universidad Autónoma de San Luis Potosí, UASLP; National Natural Science Foundation of China, NSFC; European Research Council, ERC, (MoER TK202); European Research Council, ER
İşlenmiş Yayların Katlanabilir Roket Kanatçıklarındaki Performansının İncelenmesi
No full textThe defense industry and space exploration represent the pinnacle of technology today. Rockets, satellites, and other spacecraft used in these fields are formed by bringing together complex systems. However, the most crucial element within this complexity is the precise operation of sensitive components in harmony. One of the most striking examples of this harmony is the foldable rocket fins and foldable satellite panels. The accurate and precise functioning of these parts at the moment they are deployed is of critical importance for the success of space exploration and defense strategies. In this thesis, 10 machined torsion spring samples with different spring constants were produced for use as actuators in the designed foldable rocket fin mechanism. AISI 630 (1.4542) martensitic stainless steel was chosen for the production of the machined springs, and tensile tests of the material were conducted. Machining and profile laser cutting methods were used for the production of the springs, and the effects of these manufacturing methods on the springs' performance were also investigated. The spring constants of the springs were determined through analytical, numerical, and experimental measurements. Subsequently, a test system was designed and manufactured to measure the performance of the springs in foldable rocket fins. The springs were tested in this system, and the fin deployment times were measured to reveal their performance. While the springs produced through machining achieved much more precise dimensions with a tolerance of 0.05 mm, dimensional deviations of up to 0.2 mm occurred in the profile laser cutting method. Additionally, it was observed that softening of the material caused by the laser cutting process led to yielding during torsion tests. However, the laser profile cutting method was found to have an advantage over machining, with a reduction in production time by 3.6 times and cost by 5 times. It was demonstrated that the spring constant and torque values determined through numerical and analytical methods were accurate to over 95% compared to the experimentally measured values. The foldable fin mechanism designed and produced within the scope of the thesis was successfully used to measure the performance of the machined springs. In this context, it was found that the springs providing approximately 11 Nm torque at 135° achieved the target deployment time of 200 milliseconds with an average value of 182.5 milliseconds. The results of the dynamic analysis were found to be 95.4% accurate compared to the deployment times measured in foldable fin tests performed experimentally using high-speed cameras. Thus, it has been shown that dynamic analyses can be successfully used to avoid the costs associated with setting up experimental systems.Savunma sanayi ve uzay keşifleri, günümüzde teknolojinin zirvesini temsil eden alanlardır. Bu alanlarda kullanılan roketler, uydular ve diğer uzay araçları, karmaşık sistemlerin bir araya gelmesiyle oluşturulurlar. Ancak, bu karmaşıklığın içindeki en önemli unsur, hassas parçaların birbiri ile uyumlu bir şekilde çalışmasıdır. Bu uyumun en çarpıcı örneklerinden biri, katlanır roket kanatları ve katlanır uydu kanatlarıdır. Bu parçaların açıldığı anda tam doğruluk ve hassasiyetle çalışması, uzay keşiflerinin ve savunma stratejilerinin başarısı açısından kritik bir öneme sahiptir. Bu tez çalışmasında, tasarlanan katlanır roket kanatçığı mekanizmasında eyleyici olarak kullanılmak üzere, farklı yay sabitlerine sahip, 10 adet işlenmiş burulma yayı numunesi üretilmiştir. İşlenmiş yayların üretiminde AISI 630 (1.4542) martenzitik paslanmaz çelik tercih edilmiş ve malzemenin çekme testleri gerçekleştirilmiştir. Yayların üretilmesinde talaşlı imalat ve profil lazer kesim yöntemleri kullanılarak yayların elde edilmesine ve performansına üretim yöntemlerinin etkisi de araştırılmıştır. Yayların yay sabitleri analitik, nümerik ve deneysel ölçümlerle belirlenmiştir. Ardından yayların katlanabilir roket kanatçıklarındaki performanslarını ölçmek için bir deney sistemi tasarlanarak imal edilmiştir. Yaylar bu deney sisteminde test edilerek kanatçığın açılma süreleri ölçülerek performansları ortaya konulmuştur. Yaylar talaşlı imalat ile 0,05 mm tolerans ile çok daha hassas ölçülerde elde edilirken, profil lazer kesim yönteminde 0,2 mm'ye varan oranda ölçüsel sapmalar meydana gelmiştir. Ayrıca lazer kesim yönteminde malzemede meydana gelen yumuşamaya bağlı olarak burma testlerinde akma meydana geldiği görülmüştür. Bununla birlikte lazer profil kesim yönteminin, talaşlı imalata göre imalat süresinde 3,6 kat ve maliyette 5 kat azalma sağlaması avantajına sahip olduğu görülmüştür. İşlenmiş yay numunelerinde nümerik ve analitik yöntemlerle belirlenen yay sabiti ve tork değerlerinin, deneysel olarak ölçülen değerleri %95'in üzerinde bir oranla doğru belirlenebildiği gösterilmiştir. Tez kapsamında tasarlanıp üretilen açılır kanat mekanizması, işlenmiş yayların performanslarının ölçümünde başarıyla kullanılabilmiştir. Bu kapsamda 135°'de yaklaşık 11 Nm tork veren yayların, ortalama olarak 182,5 milisaniye süreyle hedeflenen 200 milisaniye kanat açma süresini çok yakın değerlerle sağlayabildiği bulunmuştur. Dinamik analiz sonuçlarının, deneysel olarak gerçekleştirilen katlanır kanat testlerinde yüksek hızlı kameralarla ölçülen açılma sürelerine, %95,4 oranında yaklaştığı görülmüştür. Böylece dinamik analizlerin, deneysel sistemler kurmaya bağlı maliyetlerden kaçınmak için başarıyla kullanılabileceği gösterilmiştir
Management of Sour Cherry Processing Industry Wastewater by Super Critical Fluid Method: Sequential Recovery and Treatment
No full textThe fruit processing industry wastewater contains a significant amount of bioactive substances. In the sustain-ability framework and the circular economy, the by-product can be transformed into valuable resources before being treated. By integrating management strategies, the industry can minimize its environmental footprint, promote economic benefits, and support the sustainability of freshwater resources. This study subjected consecutively recovery (supercritical CO2: SC-CO2) and treatment (supercritical water oxidation: SCWO) by using the supercritical fluid method. In this study, sour cherry UF retentate with high-load organics, which include especially valuable phenolics was used. The mean COD and total phenolic substance content (TPC) were determined as 15,650 mg/L and 457 mg GAE/L, respectively. Recovery efficiencies of TPC and total flavonoid substance content (TFC) of extracts were up to 5 % and 10 % with SC-CO2 extraction, respectively. Additionally, the highest enrichment efficiencies were determined as 35 % and 140 %. While the TPC of sour cherry UF retentate was 72 mg/100 g sample, it increased up to 278 mg/100 g in the extract obtained under 40 degrees C and 30 MPa. Flavonoids from phenolic substances had high recoverability in SC-CO2 compared to the other phenolic groups. Following extraction, the samples were treated using the supercritical water oxidation process. Wastewater with high organic load was effectively treated in a short time (15 min) and the removal efficiencies changed between 78 % and 98 %. Additionally, toxicity tests were conducted in selected optimum extraction (27 MPa and 40 degrees C) and oxidation (1.68 DOD and 3 min) conditions, and the toxicity units of extracted and treated wastewaters decreased compared to those obtained from raw wastewater for Daphnia magna and Vibrio fischeri toxicity tests. These findings show that the supercritical fluid method can be a favorable alternative for management of fruit juice industry wastewater.KTUN-BAP [222301003]TUBITAK [120Y351]The authors would like to acknowledge for the financial support provided by TUBITAK (project number: 120Y351) and KTUN-BAP (project number: 222301003) . Additionally, the authors express their gratitude to Mueberra Nur Kilicarslan, Esra Bircan, and Asl ; imath;han Ozturk for their contributions to the laboratory experiments
The Effect of Ambiguity Resolution on the Precision of the Gps/Galileo Ppp Using a U-Blox Zed-F9p Low-Cost Gnss Receiver
No full textThanks to the increasing number of low-cost dual-frequency GNSS receivers available on the market, the usability of these receivers for geodetic applications is increasing. Recently, PRIDE Lab at GNSS Research Center of Wuhan University has started to produce GNSS observable-specific phase biases for all-frequency. This enables precise point positioning with ambiguity resolution (PPP-AR) not only for conventional frequencies but also for other arbitrary frequencies. In this work, static and kinematic PPP-AR precision of the u-blox ZED-F9P low-cost GNSS receiver are investigated by comparing it with a geodetic-grade GNSS receiver using GPSonly, Galileo-only, and GPS + Galileo combinations for nearly two months period. Wide-lane (WL) and Narrow-lane (NL) AR fixing rates, cycle slips, code multipath, and frequency availability are also investigated for both receivers. In the positioning domain, GPSonly, Galileo-only, and GPS + Galileo PPP positioning precision using float ambiguities is significantly improved after AR for both receivers. GPS + Galileo PPP provides the best precision comparing with the other PPP solutions for both receivers using float and fix ambiguities. For static GPS + Galileo PPP-AR, the standard deviation of north, east, and up components are computed as 2.7/1.7/3.2 mm and 2.2/2.3/5.4 mm for the geodetic receiver and the u-blox receiver, respectively. The results also reveal that kinematic PPP-AR for the u-blox receiver is not as reliable as the geodetic-grade receiver yet suggesting potential for improvement in future iterations. (c) 2024 COSPAR. Published by Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies
A New Approach To Determine the Flexural Stiffness Coefficient for Reinforced Concrete Shear Walls According To Non-Linear Behaviour
No full textThe precision in calculating the stiffness of reinforced concrete sections is critical for establishing accurate values for structural stiffness and the associated seismic loads. This study investigated effective stiffnesses recommended for use in designing and analysing structures. A total of 135 section models with transverse and longitudinal reinforcement ratios, compressive strength of concrete and axial load levels affecting the analytical analysis of the nonlinear behavior of reinforced concrete shear walls with high ductility levels were considered. The key parameters influencing effective stiffness an aspect that encompasses the impact of cracking and theoretical yielding within structural sections were identified through thorough moment-curvature analyses conducted on a range of shear wall sections. According to the numerical analysis results of the shear wall models, it was found that these design parameters were effective on the stiffness coefficient of the sections. Considering the effective stiffness of section models, a secure and simpler equation is proposed to include these parameters. The equation provides a high degree of accuracy in design and analysis by considering the nonlinear behavior of shear walls in buildings concerning important design parameters. Based on the results of the nonlinear analysis, the proposed predictions for the effective stiffness coefficient, relations proposed by many researchers, standards, and codes, are verified by comparisons with moment-curvature relations. The proposed equation for the effective stiffness of shear wall sections with high ductility levels offers fairly accurate and consistent estimates since it considers all design parameters that affect the non-linear behavior of the sections. This equation has been compared with nonlinear analyses of section models and existing relationships in the literature and has been proven to be reasonably accurate for practical engineering design applications. In the proposed equation, the stiffness coefficients of shear walls can be calculated according to these effective design parameters, and it can verify and design high ductility shear walls with sufficient accuracy in practical engineering design and analysis applications
Effect of Water Aging on the Mechanical Properties of Hybrid Carbon/Aramid Reinforced Thermoplastic Composites
No full textIn this study, the mechanical properties of thermoplastic Elium matrix composites reinforced with Carbon/Aramid (CA) intraply hybrid fibers are investigated experimentally. CA Elium composites, produced using the hand lay-up assisted vacuum infusion method, are subjected to aging in distilled water for 6 months. Tensile, flexural, and single-edge notch bending (SENB) tests are performed on specimens aged for 2, 4, and 6 months, as well as on unaged specimens. The mechanical performance of CA Elium composites is compared to evaluate the effects of water aging. Water absorption nearly reaches saturation after two months, and the mechanical properties are significantly affected during this period. Flexural properties are the most affected by aging, and flexural strength decreases by 25.89% from 291.46 to 216.00 MPa after 6 months. The tensile properties are slightly affected by aging, and the tensile strength decreases by only 4.40% from 515.37 to 492.68 MPa. SENB tests indicate a moderate change and fracture toughness decreasing by 21.56% from 138.83 to 108.89 MPa.m0.5 after aging. In conclusion, flexural behavior emerges as the most critical aspect to consider for CA Elium composites intended for long-term water exposure. © 2025 The Author(s). Advanced Engineering Materials published by Wiley-VCH GmbH.Konya Teknik Üniversitesi, KTUN, (221110045); Konya Teknik Üniversitesi, KTU