cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Type II see-saw dominance in SO(10)
Creators: name: Melfo, Alejandra
name: Ramirez, Alba
name: Senjanovic, Goran
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Grand unified theories where the neutrino mass is given by Type II seesaw have the potential to provide interesting connections between the neutrino and charged fermion sectors. We explore the possibility of having a dominant Type II seesaw contribution in supersymmetric SO(10). We show that this can be achieved in the model where symmetry breaking is triggered by 54 and 45-dimensional representations, without the need for additional fields other than those already required to have a realistic charged fermion mass spectrum. Physical consequences, such as the implementation of the BSV mechanism, the possibility of the fields responsible for Type II see-saw dominance being messengers of supersymmetry breaking, and the realization of baryo and leptogenesis in this theories are discussed.
description: 14 pages, 3 figures. New version with references added
Topology optimization and manufacturing of engine bracket using electron beam melting
Creators: name: Işık, Murat
name: Kisa, Erdal
name: Yildiz, Mehmet
name: Pehlivanogullari, Baris
name: Orhangul, Akin
name: Akbulut, Guray
name: Koc, Bahattin
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2021

description: Nickel-based alloys are widely used for aerospace applications since they exhibit tremendous mechanical strength under extreme conditions. Additive manufacturing (AM), especially electron beam melting (EBM), technology is of interest due to its potential of direct digital manufacturing of highly complex fully functional light-weight critical components such as engine brackets. Most critical tasks of the brackets in their use, are to damper the vibration and support the engine weight. Consequently, it is desired simultaneously to reduce weight and maintaining good mechanical properties where the topology optimization is the right tool. In this study, the reference and weight-reduced brackets are fabricated via EBM method, and then followed by subjecting to the hot isostatic pressing (HIP) procedure. The engine bracket is weight reduced with a value of 32.08% utilizing a developed finite element analyses (FEA) based topology optimization. Furthermore, the effect of different loading conditions on the topology optimization of the EBM-built Inconel 718 bracket is studied. The mechanical property values for the FEA are obtained based on experimental data. The reference and topologically optimized brackets are subjected to the tensile tests using a tailor-made fixture and the area under the ‘Load vs. Tensile Extension’ curves are estimated to obtain average energy values using software where a 16.3% energy increase is witnessed.
description: Journal of Additive Manufacturing Technologies, Vol. 1 No. 3 (2021): J AM Tech
Essays on the economics of environmental regulation
Creators: name: Najjar, Nouri
Publisher: name: University of British Columbia
Year: 2018

description: Environmental regulations targeting producers are in place around much of the world. Yet, there is limited evidence of how firms are affected by these policies. This thesis provides new empirical and theoretical evidence on the effects of environmental regulation on producers. The first two chapters of this thesis explore a trend underway in much of the industrialized world: pollution from manufacturing has been falling despite increased output. In the first chapter, we develop a theoretical model to show the channels through which regulation can contribute to an industry’s “clean-up”. This model highlights the role that fixed costs producers must pay to adopt cleaner production processes play in dictating these channels. We show that if these fixed costs are relatively low, the adoption of cleaner processes will be the primary regulatory channel of an industry’s clean-up. However, if these fixed costs are relatively high, then plant exit and reductions in output from regulated plants will be the primary channels. The second chapter provides the first estimates of the regulatory channels of the manufacturing clean-up. We estimate the share of the Canadian manufacturing clean-up explained by the adoption of cleaner production processes, the reallocation of output across producers, and producer entry and exit. To do this, we examine a major revision to Canadian environmental policy using a novel, confidential dataset containing information on the production decisions and pollution emissions of Canadian manufacturing plants. We find regulation explains, at most, 61% of the Canadian clean-up, but the underlying channels differ strikingly across pollutants. A concern in debates over environmental regulation is a potential loss of international competitiveness among domestic producers. Despite its pervasiveness in policy discussions, evidence of these losses remains scarce. The third chapter of this thesis provides the first plant-level estimates of the effect of air pollution regulation on exporting. We study the effects of the Canada-Wide Standards for Particulate Matter and Ozone on the decision to export and export volumes of Canadian manufacturing facilities. We find evidence that environmental regulation caused relatively low-productivity exporters to leave the export market, and reduced the amount surviving exporters sold abroad.
Entre donas, churros y viejas.
Creators: name: Solis Valladares, Victor Hugo
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 321004
subject: Nutritional science
classificationCode: 321005
subject: Public health nutrition

description: La comida rápida forma parte de una cultura gastronómica en todo el mundo. La gastronomía mexicana incluye frituras dulces o saladas. Las donas, churros y frituras de maíz, son consumidas de forma habitual. El presente estudio tuvo como finalidad determinar la cantidad de grasa que poseen este tipo de alimentos y el potencial riesgo hacia la salud.
Directed energy deposition process development for functionally gradient Copper-Inconel 718 materials
Creators: name: Balkan, Muhammed Enes
name: Aydoğan, Eda
name: Işık, Murat
name: Derin, Bora
name: Koç, Bahattin
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2021

description: Bimetallic systems are widely used in applications requiring combination of different material properties, such as in the aerospace industry, nuclear industry. Especially in rocket propulsions, Copper-Inconel alloys provide significant advantages due to the excellent heat conduction and wear resistance of Copper alloy and corrosion and oxidation resistance of the Inconel alloy. However, bimetallic systems produced by traditional methods could fail because of different material behavior under extreme conditions. Recently, additive manufacturing (AM) is considered as a promising technique to produce functionally graded materials (FGM) for large and complex parts with a short lead-time. In this paper, we aim to develop a CuSn10-Inconel 718 functionally gradient material using directed energy deposition (DED) AM process to elucidate the relation between process parameters and the microstructure. The DED process parameters have been optimized to produce desired FGM structure, and thermodynamic calculations have been conducted to investigate undesired phases within the gradient structure. Microstructure and the elemental composition of the gradient material have been investigated using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The study aims to combine the experimental and thermodynamic computational modeling, to demonstrate the viability of assessment through computational work for a gradient material additively manufactured by DED processes.
description: Journal of Additive Manufacturing Technologies, Vol. 1 No. 3 (2021): J AM Tech
Energy and Climate Strategies, Interests and Priorities of the EU and Turkey
Creators: name: Colantoni, Lorenzo
name: Korkmaz, Dicle
name: Sartor, Nicolò
name: Schröder, Mirja
name: S. Duygu Sever
name: Suhnaz Yilmaz
Publisher: name: Zenodo
Year: 2017
Subjects: European Union; EU-Turkey Relations; Energy; Energy and Climate Strategies; Natural Gas Imports; Diversification; Renewables; Nuclear Power; Supply; Sustainability; Competitiveness; Energy Cooperation; ENTSO

description: FEUTURE Online Paper No. 2

Energy is one of the sectors in which EU-Turkey cooperation could be most fruitful, possibly leading overall convergence through the common achievement of mutual interests in key areas - in particular, natural gas imports and diversification. Yet, this collaboration is undermined by the uncertainty over Turkey’s position vis-à-vis these policies and its undefined commitment to others, such as renewables and nuclear power; by doubts over the ability of the EU to balance security of supply, sustainability and competitiveness; and by the unclear growth trends of both regions. This situation is partially balanced by Turkey’s and the EU’s participation in several -sometimes successful - platforms for energy cooperation on the bilateral and multilateral levels (i.e. ENTSO-E, the European Network of Transmission System Operators for Electricity and Med-TSO, the Association of the Mediterranean Transmission System Operators), which are aimed at the integration of the two polities’ energy markets. Nonetheless, the overall energy framework still needs a strong policy boost to set it on a common path towards convergence.
description: This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 692976. This publication reflects the views only of the authors, and the Commission cannot be held responsible for any use which may be made of the information contained therein.
Ab initio theory of Fano resonances in plasmonic nanostructures and metamaterials
Creators: name: Gallinet, Benjamin
name: Martin, Olivier J. F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: An ab initio theory for Fano resonances in plasmonic nanostructures and metamaterials is developed using Feshbach formalism. It reveals the role played by the electromagnetic modes and material losses in the system, and enables the engineering of Fano resonances in arbitrary geometries. A general formula for the asymmetric resonance in a non-conservative system is derived. The influence of the electromagnetic interactions on the resonance line shape is discussed and it is shown that intrinsic losses drive the resonance contrast, while its width is mostly determined by the coupling strength between the non-radiative mode and the continuum. The analytical model is in perfect agreement with numerical simulations.
description: 13 pages, 5 figures
IEEE_SamikshaFinal.doc
Creators: name: Kolhe, Pravin
Publisher: name: figshare
Year: 2023
Subjects: Computer vision and multimedia computation not elsewhere classified

description: The project, Food canteen Mess Search App is Android application that allows individual to search Nearest food canteen. The application will have all the list of nearby food canteens and individual can search. That are registered by the owners of the canteen on the application. Application will have all the information about canteen like food information, Schedule, location and etc on the app. The individual can search Canteen based on his preference like food, location, time.
Disproportionate exposure to adversity and trauma among students who experience school discipline - A scoping review protocol
Creators: name: Sanders, Jane
name: Swiatek, Emma
name: Igor, Elo
name: Massey, Michael
name: Joseph, Andrea
Publisher: name: figshare
Year: 2021
Subjects: Education

description: Abstract Objective: The objective of this scoping review is to understand the current state of the literature on school discipline and trauma. This study will seek to identify and describe what is already known about exposure to trauma or adversity related to school discipline, identify any gaps in our understanding, and understand how trauma/adversity is contextualized or theorized within school discipline. Introduction: The disproportionate application of discipline reflects and feeds into the overall racial and gender opportunity gap. While there is extensive literature on the rate and impact of trauma and adversity in education, its role specific to school discipline is understudied. Understanding the lives of students is essential for healthy relationships and connections within schools, which in turn fosters school success, as well as, playing a key role in schools that have low rates of suspension. Inclusion criteria: This scoping review will include research related to students, parents, staff and any other data that considers adversity or trauma within school discipline. The concept includes expanded forms of adversity, Adverse Childhood Experiences (ACEs), potentially traumatic experiences, or the identification of symptoms, characteristics or expressions of trauma among students who have been disciplined in school. Research that discusses adversity or trauma in education but not specific to discipline are excluded. Research that discusses adversity or trauma in the home or community but not specific to discipline are excluded. The context for this scoping review is interdisciplinary, global understanding of the role of trauma or adversity within school discipline. This takes place in a context of disproportionate impact of school discipline, notably, suspension and expulsion on specific students, notably Black and Indigenous students. Methods: The proposed scoping review search strategy will aim to locate published studies of school discipline that include adversity or trauma. The first stage of the three stage search strategy, an initial limited search was conducted January, 2021. From this, a full search strategy was developed for Criminal Justice Abstracts, ERIC, PsychInfo (Proquest), Scopus, Social Service Abstracts, Social Work Abstracts, Sociological Abstracts. The reference list of all included articles will be searched for additional relevant studies as the third step to this three step process. Studies published in English will be included with no beginning date identified.
Use of a nozzle with a rectangular orifice on a hybrid FFF system
Creators: name: Gharehpapagh, Bahar
name: Dilberoğlu, M. Uğur
name: Dölen, Melik
name: Yaman, Ulaş
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2021

description: Fused Filament Fabrication (FFF) process has lower surface roughness quality, precision and it takes longer to fabricate compared to the conventional manufacturing operations and some additive manufacturing technologies. In order to overcome these issues, a rotary extruder head with a nozzle having a rectangular orifice has been utilized in this work. A new tool path planning for a rectangular nozzle is designed to increase the efficiency of the extrusion process by this nozzle. As a result, finer features (such as outer surfaces, edges, corners, etc.) can be 3D-printed with greater accuracy, and inner regions can be extruded in less time. The design algorithms for outer shells, inner regions, and infill paths are presented here to show the procedure of the tool path planning and examined for different test cases. Some modifications in the case of concave curves as the outer shells are also offered. Moreover, these test cases have been fabricated in our hybrid manufacturing system named HYBRO, which has five axes plus milling and rotary extruder heads to demonstrate this new strategy. The results demonstrate the smallest and the largest bead widths obtained with the same rectangular nozzle.
description: Journal of Additive Manufacturing Technologies, Vol. 1 No. 3 (2021): J AM Tech
High deposition additive manufacturing by tandem plasma transferred arc welding
Creators: name: Ertugrul, Gökhan
name: Hälsig, Andre
name: Kusch, Mario
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2021

description: Plasma Transferred Arc Welding (PTA) is an important method for efficient component coating. In that field PTA has advantages, such as the free integration and mixing of a variety of filler materials as well as the largely independent material supply in relation to the energy input. Increasingly, the market is being driven by the challenge of providing efficient, high-performance, and safe coatings of complex geometries and components with flexible material depositions, as well as increasing the deposition rate. These tasks are fulfilled by the systematic coupling of two plasma transferred arc welding systems to form a tandem PTA system. Both PTA torches are positioned in such a way that they act in a common melt pool. In previous research it was provided that, deposition rate is 140 % increased with tandem PTA method in comparison to classical single torch PTA coating method. In this research, a direct comparison with classical single torch PTA with parallel driven tandem PTA for additive manufacturing was done. The additive deposition capacity of tandem PTA is 56 % higher than classical PTA for specified time.
description: Journal of Additive Manufacturing Technologies, Vol. 1 No. 3 (2021): J AM Tech
Distortion and dimensional deviation of Inconel 718 auxetic structures produced by DMLM
Creators: name: Gunaydin, Kadir
name: Gülcan, Orhan
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2021

description: Due to their geometrical shapes, auxetic structures expand laterally when stretched and contract laterally when compressed. These structures find their usages in different industries where high energy absorption, toughness, flexural rigidity or buckling under pure bending are required. Since additive manufactured parts have some amount of distortion and since this distortion has a great influence on mechanical properties of the final part, knowledge about distortion characteristics of thin-walled lattice structures manufactured by additive manufacturing is very important to better estimate and evaluate the mechanical behavior of these parts when used in industrial applications. For this purpose, this study focuses on distortion characteristics of IN718 re-entrant, anti-tetrachiral and honeycomb lattice structures manufactured by direct metal laser melting technology. The specimens with different geometries were scanned in two conditions: just after printing when parts are still on build plate and just after removing the specimens from build plate and splitting them into three pieces. Scanned data were compared with the original CAD model and finite element analysis.
description: Journal of Additive Manufacturing Technologies, Vol. 1 No. 3 (2021): J AM Tech
Detection of radioactive material entering national ports: A Bayesian approach to radiation portal data
Creators: name: Dalal, Siddhartha R.
name: Han, Bing
Publisher: name: arXiv
Year: 2010
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Given the potential for illicit nuclear material being used for terrorism, most ports now inspect a large number of goods entering national borders for radioactive cargo. The U.S. Department of Homeland Security is moving toward one hundred percent inspection of all containers entering the U.S. at various ports of entry for nuclear material. We propose a Bayesian classification approach for the real-time data collected by the inline Polyvinyl Toluene radiation portal monitors. We study the computational and asymptotic properties of the proposed method and demonstrate its efficacy in simulations. Given data available to the authorities, it should be feasible to implement this approach in practice.
description: Published in at http://dx.doi.org/10.1214/10-AOAS334 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Effect of gap distance on surface roughness of DMLM‘ed parts with contactless support design
Creators: name: Tekoğlu, Emre
name: Celik, Alican
name: Yasa, Evren
name: Sonmez, M. Seref
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2021

description: In this study, coupons with contactless supports were prepared from CoCr alloy powders via Direct Metal Laser Melting (DMLM) printing method. The aim of this study is to understand the effect of different parameters on the topography and microstructural properties of the downface surface of the main part, where the interaction takes place with the contactless support. Different type of contactless support samples was printed as a function of gap distance. Angles with respect to x-axis of the cylindric part downfaces was 45º. Besides, gap distances between the cylindric part and support were designated as 150, 250 and 300 µm, respectively. Several characterizations were performed to understand the effect of gap distance on the downface surface of the main part. Arithmetic mean heights of the samples (which is an extension of average roughness) of the printed samples were measured by an optical profilometer. Besides, microhardness of the samples was measured by a Vickers microhardness tester. Optical microscope analysis was performed on the printed parts to investigate the sub-surface porosities and surface topology. Results showed that integration of the contactless supports have a positive effect on decreasing surface roughness. Arithmetic mean height (Sa) of the unsupported surface was 21.22 µm, which was ~13% higher than the surface having a contactless support with 300 µm gap distance (18.86 µm).
description: Journal of Additive Manufacturing Technologies, Vol. 1 No. 3 (2021): J AM Tech
Duality of parity doublets of helicity $\pm 2$ in $D=2+1$
Creators: name: Dalmazi, D.
name: Mendonça, Elias L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In $D=2+1$ dimensions there are two dual descriptions of parity singlets of helicity $\pm 1$, namely the self-dual model of first-order (in derivatives) and the Maxwell-Chern-Simons theory of second-order. Correspondingly, for helicity $\pm 2$ there are four models $S_{SD\pm}^{(r)}$ describing parity singlets of helicities $\pm 2$. They are of first-, second-,third- and fourth-order ($r=1,2,3,4$) respectively. Here we show that the generalized soldering of the opposite helicity models $S_{SD+}^{(4)}$ and $S_{SD-}^{(4)}$ leads to the linearized form of the new massive gravity suggested by Bergshoeff, Hohm and Townsend (BHT) similarly to the soldering of $S_{SD+}^{(3)}$ and $S_{SD-}^{(3)}$. We argue why in both cases we have the same result. We also find out a triple master action which interpolates between the three dual models: linearized BHT theory, $S_{SD+}^{(3)} + S_{SD-}^{(3)}$ and $S_{SD+}^{(4)} + S_{SD-}^{(4)}$. By comparing gauge invariant correlation functions we deduce dual maps between those models. In particular, we learn how to decompose the field of the linearized BHT theory in helicity eigenstates of the dual models up to gauge transformations.
description: 15 pages, no figures
Getting Started on Scope 3 Emissions
Creators: name: Project, Embedding
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 370201
subject: Climate change processes
classificationCode: 410404
subject: Environmental management

description: A guide for companies of all sizes, execs, and directors to understand the basics of Scope 3 and how companies should begin to take credible action. The guidance is anchored in the real-world experience of companies that are already navigating this journey.
BEC-BCS crossover in a p+ip-wave pairing Hamiltonian coupled to bosonic molecular pairs
Creators: name: Dunning, Clare
name: Isaac, Phillip S.
name: Links, Jon
name: Zhao, Shao-You
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We analyse a p+ip-wave pairing BCS Hamiltonian, coupled to a single bosonic degree of freedom representing a molecular condensate, and investigate the nature of the BEC-BCS crossover for this system. For a suitable restriction on the coupling parameters, we show that the model is integrable and we derive the exact solution by the algebraic Bethe ansatz. In this manner we also obtain explicit formulae for correlation functions and compute these for several cases. We find that the crossover between the BEC state and the strong pairing p+ip phase is smooth for this model, with no intermediate quantum phase transition.
description: 30 pages
Effect of process parameters of the positive displacement pump for extrusion based bioprinting application
Creators: name: Ugurluoglu, Yusuf Furkan
name: Gentile, Piergiorgio
name: Ferreira-Duarte, Ana
name: Munguia, Javier
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2021

description: Bioprinting is an emerging technology that provides the ability to fabricate customized tissue constructs. One of the most common methods is Extrusion Based Bioprinting (EBB) which allows extruding high viscosity materials at a low cost. While currently available EBB methods provide an acceptable extrusion process, several disadvantages remain a challenge such as low extrusion accuracy in terms of start and stop accuracy. The present study aimed to explore the relationship between the extrusion accuracy and syringe features including plunger rubber compressibility and amount of volume inside the syringe. The weighing scale and the flow rate sensor are used to assess the extrusion accuracy. Results show that the plunger rubber has a negative impact on extrusion accuracy due to its compressibility. Likewise, when the amount of compressed volume inside the syringe increases, the start and stop accuracy of extrusion decreases. The time required to reach desired flow rate was measured as 17, 25, 29 seconds (±0.5) for 20, 30 and 40 ml filled syringe volumes respectively. The findings can contribute to a better understanding of the positive displacement pump and the extrusion accuracy relationship. As a result of these investigations, suggestions for a better extrusion pump were identified for future research.
description: Journal of Additive Manufacturing Technologies, Vol. 1 No. 2 (2021): J AM Tech
Multi-axis 3D printing of spiral parts without support structures
Creators: name: Fazla, Bartu
name: Dilberoğlu, Mecid Uğur
name: Yaman, Ulaş
name: Dölen, Melik
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2021

description: The recent developments in Additive Manufacturing (AM) have accelerated the spread of 3D printers all over the world. Fused filament fabrication (FFF) has become the prevalent technology for use in printing typical thermoplastics. Sometimes, the nature of layer-wise production brings about the necessity of using support structures, leading to (i) increased material consumption, (ii) reduced production speed, (iii) deterioration in the part quality, and (iv) extra post-processing. To eliminate these shortcomings of FFF, researchers proposed several methods, one of which is to benefit from particular multi-axis hardware. In this study, the capability of a multi-axis FFF machine in support-less printing is introduced. The quality of the produced part is compared with that of its identical counterpart printed on a conventional (i.e., 3-axis) FFF setup.
description: Journal of Additive Manufacturing Technologies, Vol. 1 No. 2 (2021): J AM Tech
Additional file 1 of Identification of factors associated with stillbirth in Zimbabwe – a cross sectional study
Creators: name: Dube, Kushupika
name: Lavender, Tina
name: Blaikie, Kieran
name: Sutton, Christopher J.
name: Heazell, Alexander E. P.
name: Smyth, Rebecca M. D.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Developmental Biology
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1: Supplementary Figure 1. Theoretical Directed Acyclic Graph to identify potential relationships between social, behavioural and medical factors and stillbirth. Factors in blue are outcome variables, those in green with an arrow are exposures of interest and those in grey are unmeasured factors. Diagram created in Dagitty Version Version 3.0.8 SES = Socioeconomic status, HIV – Human Immunodeficiency Virus, Syph/Tet – Syphilis serology and Tetanus vaccination.
DO TENSIONS IN THE SOUTH CHINA SEA HERALD THE COLLAPSE OF GLOBAL SUPPLY CHAINS?
Creators: name: IJMVSC
Publisher: name: Zenodo
Year: 2024

description: It is now widely recognized that geopolitical tensions disrupt global supply chains, complicating trade flows and increasing the risk associated with logistics operations. The South China Sea, a strategic and disputed region of the world, is a perfect illustration of the stakes involved in these disruptions. Situated between several Asian countries, the region is crucial to world trade, but is subject to territorial conflicts, notably between China and Taiwan. Its increasing militarization and abundance of natural resources exacerbate geopolitical tensions, given that the South China Sea is vital for the transportation of goods, linking Asian, European and American markets. My speculative paper looks at the possible collapse of certain global value chains under the pressure of geopolitical tensions, leading to the emergence of a logistically multipolar planet.
Investigating cause of the dissimilar ductility of Inconel 718 fabricated by electron beam melting (EBM)
Creators: name: Unver, Caglar
name: Ürkmez, Ayça
name: Bilgin, Guney Mert
name: Orhangul, Akin
name: Turan, Servet
name: Turan, Dilek
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2021

description: Additive manufacturing has become mainstream many areas. In recent years, aviation has been one of the leading industries using additive manufacturing. While generally metal materials are used in this sector, the production of metal materials with additive manufacturing can be in different ways. Electron beam melting(EBM) method is based on the powder bed fusion(PBF) principle. Thanks to the PBF, it is possible to produce parts that are difficult to produce by traditional methods. In this study, it is aimed to explain the different ductility behavior of IN718 produced by EBM method by phase analysis. When all the tensile test results are examined, it is seen that the final tensile strength and yield strength results decreased by about 3%, the area reduction was reduced by about 65%, and the decrease between the elongation results after fracture was 85%. The fracture surfaces were examined different phase images were seen in the samples with value of low ductility. To understand this difference, fracture surfaces and shiny surfaces were examined with electron microscopy and XRD. As a result of the examination, differences were observed in the areas with high Nb content and in the amount of a precipitate phase in the structure.
description: Journal of Additive Manufacturing Technologies, Vol. 1 No. 2 (2021): J AM Tech
Additional file 2 of Identification of factors associated with stillbirth in Zimbabwe – a cross sectional study
Creators: name: Dube, Kushupika
name: Lavender, Tina
name: Blaikie, Kieran
name: Sutton, Christopher J.
name: Heazell, Alexander E. P.
name: Smyth, Rebecca M. D.
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Cell Biology
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Developmental Biology
subject: Cancer
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 2: Supplementary Table 1. Singleton pregnancy model findings based on complete case data from postnatal ward sample (percentages exclude unknown cases).
Near-optimal sample complexity for noisy or 1-bit tensor completion
Creators: name: Ghadermarzy, Navid
Publisher: name: University of British Columbia
Year: 2018

description: Tensor completion is the problem of recovering a low-rank tensor from a partial subset of its entries. Assuming a rank-r, order-d tensor in ℝ^{NxNx...N}, the best sampling complexity achieved is O(rN^{d/2}) which can be obtained by a tensor nuclear-norm minimization problem. This bound is significantly larger than O(rdN), the number of free variables in a rank-r tensor. In this thesis, we prove that when r=O(1), we can achieve optimal sample complexity by constraining either one of two proxies for tensor rank, the convex M-norm or the non-convex max-qnorm. The max-qnorm is the generalization of matrix max-norm to tensors which is non-convex. The M-norm, on the other hand, is a convex atomic norm whose atoms are rank-1 sign tensors. We prove that both max-qnorm and M-norm of a bounded rank-r tensor are bounded by quantities that are independent of N. We also prove that the unit balls of both these norms have small Rademacher complexity. We analyze max-qnorm and M-norm constrained least squares minimization problems for tensor completion, proving that when r=O(1), m=O(Nd) measurements are sufficient for efficient estimation of the original tensor. We also use an information theoretic technique to prove that the dependence on N is optimal. Moreover, we design an alternating method for approximating the solution of max-qnorm tensor completion and do a thorough investigation of its performance on synthetic and real-world data. We also generalize the 1-bit matrix completion problem to higher-order tensors. We prove that when r=O(1) a bounded rank-r, order-d tensor T in ℝ^N x ℝ^N x ... x ℝ^N can be estimated efficiently by only m=O(Nd) binary measurements by regularizing either its max-qnorm or its M-norm. We prove that the sample complexity of recovering a low-rank tensor from 1-bit measurements of a subset of its entries is the same as recovering it from unquantized measurements. Moreover, we show the advantage of using 1-bit tensor completion over matricization both theoretically and numerically. Specifically, we show how the 1-bit measurement model can be used for context-aware recommender systems.
A Photonic Implementation for the Topological Cluster State Quantum Computer
Creators: name: Herrera-Martí, David A.
name: Fowler, Austin G.
name: Jennings, David
name: Rudolph, Terry
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A new implementation of the topological cluster state quantum computer is suggested, in which the basic elements are linear optics, measurements, and a two-dimensional array of quantum dots. This overcomes the need for non-linear devices to create a lattice of entangled photons. We give estimates of the minimum efficiencies needed for the detectors, fusion gates and quantum dots, from a numerical simulation.
Teaching Environmental Education To Adult Learners Using The PHI Delta Kappa Model in The Rural Communities of Cross River State, Nigeria-.pdf
Creators: name: Onnoghen, Usang  Nkanu
Publisher: name: figshare
Year: 2022
Subjects: subject: 160802 Environmental Sociology
subject: FOS: Sociology

description: The PHI Delta Kappan is a model of mass Instruction, which adopts the peer teaching methods: it advocates the selection of few learners who should be instructed based on the content of the instructional materials before releasing the selected few to become ambassadors of the message...
The Canonical Coset Decomposition of Unitary Matrices Through Householder Transformations
Creators: name: Cabrera, Renan
name: Strohecker, Traci
name: Rabitz, Herschel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper reveals the relation between the canonical coset decomposition of unitary matrices and the corresponding decomposition via Householder reflections. These results can be used to parametrize unitary matrices via Householder reflections.
Weight reduction of an unmanned aerial vehicle pylon fitting by topology optimization and additive manufacturing with electron beam melting
Creators: name: Yilmaz, Fatih
name: Şahin, Melin
name: Gürses, Ercan
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2021

description: The operating altitude of unmanned aerial vehicles can be affected by many parameters. Lightening the structural parts to achieve target altitude is one of the design efforts. Weight reduction can be achieved by converting primary and secondary structures from metallic to carbon composite material. In addition, some secondary structures, such as fittings, have to be produced metallic and usually made of aluminum alloys. In addition to the weight disadvantage, aluminum alloys have galvanic incompatibility with carbon composite materials. At this point, additive manufacturing methods offer solutions with a combination of topology optimization. Complex geometries obtained from topology optimization can be easily manufactured by additive manufacturing methods during weight reduction campaigns of unmanned aerial vehicles such as fittings. In this study, the pylon fitting of an unmanned aerial vehicle is lightened by the topology optimization method using commercial software with an engineering approach. The resulting complex geometry is produced as Ti-6Al-4V by the Electron Beam Melting additive manufacturing method. As a result of the campaign, a fitting design that is both lightweight and galvanic compatible with carbon composite primary structures has emerged. In this way, an engineering approach has been developed for weight reduction campaigns.
description: Journal of Additive Manufacturing Technologies, Vol. 1 No. 2 (2021): J AM Tech
Forecasting with Mathematical Models in Python: ARIMA and  Growth Rate Models
Creators: name: Kumar, Harendra
Publisher: name: Zenodo
Year: 2025

description: This brief manuscript describes the forecasting models which are ARIMA model consists of three components: the AutoRegressive (AR) component, the Integrated (I) component, and the Moving Average (MA) component and a Growth Rate model used in various time series data forecasting. Here a simple example is taken to describe the comparative analysis of both models in Python code.
An effective parameter in the deposition of 17-4PH powder with LMD technique: scanning speed
Creators: name: Sezer, Pelin
name: Kurama, Semra
name: Karagöz, Taner
name: Gasan, Hakan
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2021

description: Laser metal deposition (LMD) is a novel additive manufacturing technology that has recently been utilized in the aerospace and automotive sectors to improve performance and speed up the process by minimizing connecting operations (welding, screwing, etc.) in production. In this study, the effects of scanning speed parameter on the microstructure and microhardness of 17-4 PH stainless steel produced by LMD method were investigated. 17-4 PH and AISI 1050 materials were used as deposition and substrate, respectively. As one of the production parameters, the laser power (W), gas flow rate (L/min), and powder flow rate (rev/min) were kept constant while scanning speed varied between 10-15 mm/s. With the changing scanning speed, differences in microstructure and accordingly changes in microhardness were observed. The results showed that the effect of deposition and scanning speed on the substrate is important in the LMD production technique, and this effect significantly affects the mechanical and microstructural properties.
description: Journal of Additive Manufacturing Technologies, Vol. 1 No. 2 (2021): J AM Tech
A numerical investigation of the effect of support thickness and void ratio on thermal behavior and possible martensite decomposition in laser powder-bed fusion process
Creators: name: Dogan, Ebubekir
name: Yıldız, Ayşe Kübra
name: Mollamahmutoğlu, Mehmet
name: Yılmaz, Oğuzhan
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2021

description: Laser powder-bed fusion additive manufacturing process allows the production of complex parts. However, the thermal nature of the process involves spatially and rapidly changing heating-cooling cycles. This type of thermal process causes the formation of highly martensitic microstructures with poor ductility and crack resistance. To overcome this issue, a more lamellar structure for improved physical properties can be obtained either by an approach during production or by a post-production heat treatment. In this context, the support structure together with the substrate temperature are factors that can make a difference during production. If these two factors are properly determined by an assessment prior to production, martensite decomposition can be achieved In this study, the effect of the thickness and void ratio of a support structure with a constant cross-sectional area on the thermal behavior of the process was investigated numerically for the Ti6Al4V alloy. For this purpose, a case is examined for different void ratios and support thicknesses. As a result, it was predicted that the cases with a support thickness of 2 and 4 mm and a void ratio of 0.75 could initiate martensite decomposition.
description: Journal of Additive Manufacturing Technologies, Vol. 1 No. 2 (2021): J AM Tech
Open Publications of Fariz Darari
Creators: name: Darari, Fariz
Publisher: name: Zenodo
Year: 2019
Subjects: rdf
sparql
semantic web
knowledge graph
information extraction
nlp
data quality
data completeness

description: To open knowledge is to advance knowledge. Here's a list of my open publications. Let me know for any remarks, thank you. (Fariz Darari - fariz@cs.ui.ac.id)
Evaluation of suitability of polypropylene manufactured by selective laser sintering for spare parts applications
Creators: name: Unal, Deha
name: Guzel, Ibrahim
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2021

description: The production of spare parts can be adapted to distributed supply chains with Additive Manufacturing (AM) and can be carried out without molds. In the white appliances sector, the production of spare parts by AM has gained importance in recent years. However, the suitability and sustainability of the parts produced by AM for use in the final product are of critical importance. In line with this scope, the suitability of the parts produced from polypropylene (PP) powder with Selective Laser Sintering (SLS) technology for use as spare parts was examined in accordance with the determined criteria. In this direction, samples were produced from both the SLS method and the injection molding (IM) method using PP powder. In addition, the effects of the build direction and the sealing post-process were also examined for the parts produced with SLS. The mechanical properties, surface roughness, surface contact angles and water impermeability of these samples were investigated. It was observed that PP materials produced with SLS have a hydrophobic surface, do not leak water even at 0.7 mm wall thickness and less ductile under uniaxial tensile force.
description: Journal of Additive Manufacturing Technologies, Vol. 1 No. 2 (2021): J AM Tech
Electric field variability and classifications of Titan's magnetoplasma environment
Creators: name: Arridge, Chris
name: Achilleos, Nick
name: Guio, Patrick
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The atmosphere of Saturn's largest moon Titan is driven by photochemistry, charged particle precipitation from Saturn's upstream magnetosphere, and presumably by the diffusion of the magnetospheric field into the outer ionosphere, amongst other processes. Ion pickup, controlled by the upstream convection electric field, plays a role in the loss of this atmosphere. The interaction of Titan with Saturn's magnetosphere results in the formation of a flow-induced magnetosphere. The upstream magnetoplasma environment of Titan is a complex and highly variable system and significant quasi-periodic modulations of the plasma in this region of Saturn's magnetosphere have been reported. In this paper we quantitatively investigate the effect of these quasi-periodic modulations on the convection electric field at Titan. We show that the electric field can be significantly perturbed away from the nominal radial orientation inferred from Voyager 1 observations, and demonstrate that upstream categorisation schemes must be used with care when undertaking quantitative studies of Titan's magnetospheric interaction, particularly where assumptions regarding the orientation of the convection electric field are made.
description: 13 pages, 3 figures, submitted to Annales Geophysicae (AnGeo Communicates), revised version responding to peer review comments
Ordered multi-material SIMP approach applied to 3D topology optimization
Creators: name: Ozcakar, Egecan
name: Simsek, Ugur
name: Kiziltas, Gullu
Publisher: name: Journal of Additive Manufacturing Technologies
Year: 2021

description: This paper presents a topology optimization framework for multi-material 3D structures to be used in mechanical load carrying applications. This framework is an extension of an ordered multi-material interpolation scheme originally proposed in 2D to the 3D minimum compliance problem implemented in MATLAB. The algorithm starts by using the Young’s moduli and cost of the selected materials, then picks binary combinations with ordered densities to interpolate the value for the current iteration. Following these interpolations, the next step of the design is the solution of the mechanical compliance problem until the desired minimum compliance is met subject to volume and cost constraints. The solution scheme is based on Optimality Criteria Method and standard density filtering schemes. The main contribution of this paper is that the proposed design scheme implemented in MATLAB is an easy-to-use 3D topology optimization scheme with multi-material constituents based on a modified SIMP interpolation. Results show that the 3D code is able to deliver similar design results when compared with the existing 2D version. This effectively expands the topology optimization based design capability to many practical 3D engineering problems in a standard topology optimization setting and easy-to-use implementation in MATLAB.
description: Journal of Additive Manufacturing Technologies, Vol. 1 No. 2 (2021): J AM Tech