Neutron News最新文献

{"title":"Analysis of Land Subsidence Using A Combination of Preloading and Prefabricated Vertical Drain Methods","authors":"Rahayu Rahayu, Syafwandi Syafwandi, Aldo Wirastana Adinegara, Agyanata Tua Munth, A. Sumarno","doi":"10.29138/neutron.v22i01.172","DOIUrl":"https://doi.org/10.29138/neutron.v22i01.172","url":null,"abstract":"Pertamina Balongan Indramayu's New Construction Jetty & Temporary Access Road Construction Project is the construction of a new jetty (silting prevention pier) located on a loamed land, which consists of dredging work on the area to be built by the jetty, protection of existing pipes, and erection of piles. In the implementation of the jetty construction, there are several reviews that need to be considered, such as soil elastic subsidence and soil consolidation subsidence. The method used for land subsidence is the Preloading method and is combined with the use of PVD to increase the time of decline. The results of this study found an elastic decrease using the Preloading method, a result of 0.7765 meters was obtained due to the presence of a stockpile load and an implementation load of 22.1312 kN/m2 on Elv. ± 1.00 m – STA. 0 + 025 m. Meanwhile, the decrease in consolidation (Sc + Ss) using the Preloading method, obtained a result of 4,949 meters due to the heap load and implementation load of 27,201 kN/m2 on Elv. ± 1.00 m – STA. 0 + 025 m and the length of time it takes to achieve the degree of consolidation of the plan (Uv = 90 %) using the Preloading method obtained results, which is 297 days. When the Preloading method is combined with using the Prefabricated Vertical Drain (PVD) method, the result of the length of time (t) needed to achieve the degree of consolidation of the plan (Uv = 90 %) is 158 days using a quadrilateral pattern installation PVD with a distance of 0.8 meters.","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90516500","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}

{"title":"Study of Agung Sleman Mosque Minaret Construction Design: Errors and Solutions","authors":"Ala Ali Qasem Alraimi, M. I. Setiawan, Adi Prawito","doi":"10.29138/neutron.v22i01.171","DOIUrl":"https://doi.org/10.29138/neutron.v22i01.171","url":null,"abstract":"This study helps to solve the problem at the minaret of Agung Mosque which costs about (Rp16.000.000.000), located in Yogyakarta city, Indonesia, Sleman street, where its high sixty seven meters from the ground and it consists of fifty floors, where analyze and prove the safety of the minaret dome, replace the dome, repair the fallen parts from middle floors, and calculate the total cost of replacing the dome and repairing fallen parts of the minaret. This study proved that the existing design reinforcement of the dome is totally safe, estimated the total cost of solving the minaret problems which (Rp2, 281,873,633.54). Where the total costs of replacing the dome were (Rp2, 073,135,813), the total costs of fixing the damaged “fallen” parts of the middle floors were (Rp1, 294,762.24), and the total of the unexpected costs were (Rp207, 443,057.59)","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80184265","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}

{"title":"Experimental Study of Utilization Coconut Fiber as Additional Material and Slag as a Cement Substitution Against Compressive Strength and Split Tensile Strength of Concrete","authors":"Adlan Rafli Pramudya, A. Sumarno","doi":"10.29138/neutron.v22i01.174","DOIUrl":"https://doi.org/10.29138/neutron.v22i01.174","url":null,"abstract":"Development developments have an impact on the building materials industry sector. To reduce CO2 emissions due to soaring productivity of cement, the industry can use Ground Granulated Blast Furnace Slag (GGBFS) as a substitute for cement. This study aims to determine the effect of using GGBFS as a substitute for cement and coconut fiber as an additive on the workability, density, water absorption, compressive strength and split tensile strength of concrete at 3, 7, and 28 days. In this study using the experimental method with a total of 84 samples of cylindrical specimens with a size of 10cm x 20cm. This research was conducted with variations of GGBFS substitution of cement (0%, 35.5%, 43.5%) and coconut fiber as an additive (0.23%, 0.63%).The results of this study indicate that the optimum compressive strength test value at the age of 28 days is at GGBFS (35.5%) and coconut fiber (0.63%) reaches an average compressive strength of 32.32 Mpa. The SU1 variation (24.63 Mpa), SU2 variation (30.20 Mpa), SU3 variation (30.77 Mpa), SU5 variation (28.16 Mpa), SU6 variation (28.31 Mpa). Optimal splitting strength at the age of 28 days, namely the SU4 variation with GGBFS 35.5% and coconut fibers (0.63%) reached an average split tensile strength of 2.23 Mpa.","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86645873","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}

{"title":"The Effect of Concrete Mixture on Usage Fly Ash and Chicken Egg Shell Powder as Cement Substitutions in Concrete Compressive Strength","authors":"Farhan Fatahillah, A. Sumarno","doi":"10.29138/neutron.v22i01.173","DOIUrl":"https://doi.org/10.29138/neutron.v22i01.173","url":null,"abstract":"The purpose of this study was to determine the effect of utilizing fly ash and chicken egg shell powder on the compressive strength of concrete, workability, density and water absorption. In this study, testing was carried out with the use of fly ash waste and chicken egg shell powder with variations of 15% fly ash waste and variations of chicken egg shell powder by 10% and 17.5% at the age of 3 days, 7 days, 14 days, and 28 days. for the test objects used measuring with a diameter of 10 cm and a height of 20 cm as many as 36 test samples by making variations of the day as many as 3 samples of test objects. \u0000Concrete with a mixture of 15% Fly Ash waste and 10% Egg Shell Powder in test sample 2 obtained a compressive strength at the age of 28 days of 29.45 Mpa. Variation of the Normal Concrete sample got a compressive strength at the age of 28 days of 30.37 MPa. Variation of test sample 3 got a compressive strength at the age of 28 days of 21.16 Mpa.","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84192998","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}

{"title":"Strikingly different roles of SARS-CoV-2 fusion peptides uncovered by SNR, SANS, QENS, and NSE experiments","authors":"N. Zaccai, A. Maestro","doi":"10.1080/10448632.2022.2091400","DOIUrl":"https://doi.org/10.1080/10448632.2022.2091400","url":null,"abstract":"Due to the COVID-19 pandemic, a thorough understanding of the molecular mechanisms of cellular infection by coronaviruses has become imperative. SARS-CoV-2 is from a family of single-stranded positive sense RNA viruses named β-coronaviruses. SARS-CoV-2 and other β-coronaviruses can cause severe respiratory dis-ease and are highly contagious. Despite this, a critical understanding of the mechanisms of cellular infection by coronaviruses has been lacking. A critical stage in cell entry by the SARS-CoV-2 virus occurs when its Spike protein mediates fusion between viral and host membranes (Figure 1). We have therefore recreated important elements of the membrane fusion mechanism by simpli-fying the system down to its core elements, amenable to experimental analysis by neutron scattering at the ILL. Structural information from Specular Neutron Reflectometry and Small Angle Neutron Scattering were com-plemented by dynamics information from Quasi-Elastic and Spin-Echo neutron scattering, accessing membrane fluidity and rigidity. Importantly, neutrons are particu-larly well suited for the study of soft and biological matter since they allow measurements with better than nanometer resolution and at energies corresponding to thermal fluctuations. They are non-destructive and highly penetrating, thus allowing work in physiological condi-tions. Furthermore, as neutrons interact very differently with hydrogen ( 1 H) and deuterium ( 2 H), it is possible through isotopic substitution, to observe hydrogen atoms and water molecules in biological samples, and therefore highlight structural and chemical differences in","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"33 1","pages":"22 - 23"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42300357","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}

{"title":"Wolfgang Götze (1936–2021)","authors":"Joachim Wuttke","doi":"10.1080/10448632.2022.2093088","DOIUrl":"https://doi.org/10.1080/10448632.2022.2093088","url":null,"abstract":"","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"33 1","pages":"29 - 29"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45708758","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}

{"title":"John R. D. Copley (1944–2022)","authors":"V. García Sakai, D. Neumann","doi":"10.1080/10448632.2022.2093087","DOIUrl":"https://doi.org/10.1080/10448632.2022.2093087","url":null,"abstract":"","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"33 1","pages":"30 - 30"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46042648","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}

{"title":"“No cost” way to improve neutron scattering resolution by 500 percent","authors":"P. Boisvert","doi":"10.1080/10448632.2022.2091388","DOIUrl":"https://doi.org/10.1080/10448632.2022.2091388","url":null,"abstract":"Scientists pushing the limits of the world’s most advanced neutron scattering instruments know that a small amount of distortion in their measurements is inevitable. For some experiments, this distortion is easily accounted for, but in other types of research, it can cause inaccurate findings. Why does a small amount of distortion matter? It’s similar to when a detective lifts a fingerprint from a glass of water. The curvature of the glass distorts the fingerprint slightly, making it difficult to match the print to a suspect’s fingerprint on file. In such a case, it would be helpful if there was a way to remove the distortion from the fingerprint found on the glass. Something like this occurred when scientists from Oak Ridge National Laboratory (ORNL) used the worldclass SEQUOIA neutron scattering spectrometer at ORNL’s Spallation Neutron Source (SNS). The researchers were measuring spin wave dispersions from a magnetic crystalline material. They discovered that the data (the fingerprint) obtained from SEQUOIA (the glass) was slightly distorted by the resolution limits of the instrument, despite its state-of-the-art design. To resolve the issue, the researchers developed a new computational technique that improved SEQUOIA’s effective resolution by 500% in order to match the data to known spin wave dispersion values. Plus, this solution comes at virtually no cost since it requires no additional hardware and uses open source software. The results of their efforts, titled, “A super-resolution technique to analyze single-crystal inelastic neutron scattering measurements using direct-geometry chopper spectrometers”, were published in the AIP journal Review of Scientific Instruments [1]. “We predicted that if we could measure the amount of distortion inherent in SEQUOIA’s data collection, we could then apply a correction that would increase the instrument’s effective resolution,” said Jiao Lin, lead instrument development scientist for the CUPI 2 D instrument at the Second Target Station (STS) [2]. “It’s similar to how eye doctors evaluate your eyesight and then prescribe corrective eyeglasses or contact lenses to compensate for the distortion in your vision.” Unlike eye doctors who only test in three dimensions, the scientists needed to measure SEQUOIA’s distortion over four dimensions. This made the task many times more challenging. Fortunately, the researchers had access to ORNL’s MCViNE open source software, which can be used to emulate neutron experiments for spin waves measured by neutron instruments like SEQUOIA. The team believed they could apply the software in a different way to obtain 4D measurements of the distortion. “To simplify the 4D measurements, we used MCViNE software to make 2D measurements along two axes at a time. We did that for both the distorted experimental image and the high-resolution idealized model we developed,” said Matt Stone, lead SEQUOIA instrument scientist at the SNS. “We then repeated the 2D measurements along many","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"33 1","pages":"27 - 28"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49581324","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}

{"title":"Dynamics of phase transitions in YVO3 investigated via inelastic neutron scattering and first-principles calculations","authors":"Y. Tao, D. Abernathy, Tianran Chen, T. Yildirim, Jiaqiang Yan, Jianshi Zhou, J. Goodenough, D. Louca","doi":"10.1080/10448632.2022.2091401","DOIUrl":"https://doi.org/10.1080/10448632.2022.2091401","url":null,"abstract":"Strong correlated system includes a wide class of materials that exhibit unusual electronic and magnetic properties, such as high-temperature superconductivity in copper oxides [1] and colossal magneto-resistivity in manganites [2]. YVO 3 is one such material that has at-tracted much attention due to the intricate coupling between spin, lattice, and orbital degrees of freedom. As the transition-metal ion V 3+ sits in an octahedral oxygen cage forming a perovskite structure, the correlation effects can lead to Jahn-Teller (JT) distortions, orbital ordering, charge and spin stripe formation, polaron localization, and phase separation. the and lattice dynamics in YVO 3 across its many structural and phase transitions and magnon changes 3 , information di-rect observation of the spin-waves and phonons in YVO 3","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"33 1","pages":"24 - 26"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42209312","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}

{"title":"Virtual School on Neutron Spectroscopy and Diffraction Held by NIST","authors":"J. Dura, K. Weigandt, Rebecca Ogg","doi":"10.1080/10448632.2022.2091385","DOIUrl":"https://doi.org/10.1080/10448632.2022.2091385","url":null,"abstract":"","PeriodicalId":39014,"journal":{"name":"Neutron News","volume":"33 1","pages":"5 - 7"},"PeriodicalIF":0.0,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45679557","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}