cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
C34_11NCEE_Rocking_frames.pdf
Creators: name: Málaga-Chuquitaype, Christian
name: Kibriya, Leena T.
name: Kashani, Mohammad M.
name: Alexander, Nicholas A.
Publisher: name: figshare
Year: 2018
Subjects: subject: 90506 Structural Engineering
subject: FOS: Civil engineering
subject: 90504 Earthquake Engineering

description: Modern code-conforming buildings have a high probability of surviving major seismic events without collapse, hence minimizing the number of casualties. Nevertheless, the risk of substantial post-earthquake economic losses remains high, as a consequence of inadequate damage prevention guidelines in current earthquake design codes. Rocking post-tensioned moment-resisting frames present a viable damage-free structural solution, with a nominal increase in building costs compared with conventional buildings. This structural system comprises of: (i) unbonded post- tensioned strands to provide overturning resistance and self-centering capability, and (ii) opening joints at the column-foundation and beam-column interfaces designed to rock during a seismic event. Rocking frames with various forms of supplemental damping have been previously examined numerically, adopting different finite element frameworks. However, there is a shortage of numerical studies studying the non-linear dynamic response of pure rocking multi-story post- tensioned moment frames, exclusive of supplementary energy-dissipation elements and devices. Hence, it is critical to develop modelling procedures for multiple stories which adequately capture the full range of their nonlinear dynamic behavior due to the joint rocking mechanism, and investigate the resulting response. Numerical studies are presented herein, including static and dynamic analyses of three- to nine-story building models. The proposed modelling methods are shown to effectively predict the non-linear response of multi-story rocking frames over a wide range of forcing frequencies and amplitudes. It is further concluded that the structural response is influenced by both sub-harmonic resonances and beam-column interactions.
title: The spectrum of complications in acute pancreatitis
Creators: name: Grasso, Damiano
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Abdomen
subject: Pancreas
subject: CT
subject: Complications
subject: Acute

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: Importance of Radiology in the diagnosis of a potentially life threatening condition such as complicated acute...
title: MRI Appearance of Chondroblastoma in long bones: Retrospective evaluation in a series of cases from single institution.
Creators: name: Agrawal, Rajat
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Anatomy
subject: Oncology
subject: CT
subject: MR
subject: Biopsy
subject: Chemotherapy
subject: Neoplasia

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: The purpose of this study was to evaluate the MRI characteristics of chondroblastoma in long bones in a series of histopathologically proven cases from a tertiary cancer care institute evaluated retrospectively from January 2015 till December...
Laplace-Runge-Lenz symmetry in general rotationally symmetric systems
Creators: name: Ben-Ya'acov, Uri
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mathematical Physics (math-ph)
subject: Classical Physics (physics.class-ph)
subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The universality of the Laplace-Runge-Lenz symmetry in all rotationally symmetric systems is discussed. The independence of the symmetry on the type of interaction is proven using only the most generic properties of the Poisson brackets. Generalized Laplace-Runge-Lenz vectors are definable to be constant (not only piece-wise conserved) for all cases, including systems with open orbits. Applications are included for relativistic Coulomb systems and electromagnetic/gravitational systems in the post-Newtonian approximation. The evidence for the relativistic origin of the symmetry are extended to all centrally symmetric systems.
title: New pathways postoperative changes in aerodigestive tract after neck surgery
Creators: name: Murakami, Naomi
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Gastrointestinal tract
subject: Head and neck
subject: Respiratory system
subject: CT
subject: CT-High Resolution
subject: Fluoroscopy
subject: Comparative studies
subject: Contrast agent-intravenous
subject: Dynamic swallowing studies
subject: Education and training
subject: Fistula
subject: Prostheses

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: Review normal neck anatomy in order to identify surgical manipulations. Recognize the anatomic changes that are associated with aerodigestive tract surgery. Discuss important complications of these...
title: Food for Justice: Power, Politics, and Food Inequalities in a Bioeconomy
title: Preliminary Research Program
titleType: Subtitle
Creators: name: Motta, Renata
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Food
subject: social change
subject: transformation research
subject: social sciences
subject: environment
subject: inequalities
subject: bioeconomy
subject: food systems
subject: food movements
subject: intersectionality
subject: gender
subject: decoloniality
subject: knowledge
subject: technology
subject: 300 Sozialwissenschaften::300 Sozialwissenschaften, Soziologie::300 Sozialwissenschaften
subject: 300 Sozialwissenschaften::300 Sozialwissenschaften, Soziologie::301 Soziologie, Anthropologie
subject: 300 Sozialwissenschaften::300 Sozialwissenschaften, Soziologie::303 Gesellschaftliche Prozesse

description: The Junior Research Group Food for Justice examines normative questions of inequalities, justice, and democracy that arise in disputes surrounding the question “how are we going to feed the world?”. Increasingly, citizens perceive the global food system as part of the historical causes of the ecological crisis and persisting hunger in the world. Although the reasons for these causal links have long been known (the use of food for profit, the gap between production and consumption, conflicts over land and water, exploitative labour relations, the energy matrix and waste generation, among others), research on food security and the bioeconomy tend to rely on the same solutions i.e searching for technological fixes toward a profit-oriented model that exploits living matter. What is needed in order to complexify the debate and contribute to socio-environmental transformation is more knowledge about which food system citizens desire, which alternative knowledges and technologies already successfully handle such claims for justice within food politics, and how to redirect public policies towards a democratic, ecological and just food system. Combining theoretical perspectives on global entangled inequalities with social movement research, Food for Justice looks at challenges and solutions both in Europe (focusing on Germany) and in Latin America (focusing on Brazil). The research consists, on one hand, of case studies of social mobilization targeting injustices in the food system and, on the other, case studies of alternative food initiatives, knowledges and technologies, such as agroecology and alternative food networks. Food for Justice aims at providing a theoretical and conceptual framework – grounded on empirical research – to analyse social and political projects that address inequalities based on class, gender, race, ethnicity, rurality, citizenship, and categorical divisions between humans and more-than-humans, thus building democratic, ecological and just food politics.
Entanglement of arbitrary spin fields in non-inertial frames
Creators: name: Montero, M.
name: Martin-Martinez, E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We generalise the study of fermionic and bosonic entanglement in non-inertial frames to fields of arbitrary spin and beyond the single mode approximation. After the general analysis we particularise for two interesting cases: entanglement between an inertial and an accelerated observer for massless fields of spin 1 (electromagnetic) and 3/2 (Rarita-Schwinger). We show that in the limit of infinite acceleration, no significant differences appear between the different spin fields for the states considered.
description: 7 pages, 3 figures. Revtex 4.1
title: Things to Measure, Monitor and Document: Post Market Surveillance of AI Model
Creators: name: Mahajan, Vidur
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Artificial Intelligence
subject: Plain radiographic studies
subject: Computer Applications-General
subject: Image verification

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: Things to Measure, Monitor and Document: Post-Market Surveillance of SaMD’s particularly AI...
title: Brain metastases from ovarian cancer, a rare but not negligible entity
Creators: name: Giordano, Carolina
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Genital / Reproductive system female
subject: MR
subject: Health policy and practice
subject: Metastases
subject: Multidisciplinary cancer care

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: Ovarian cancer (OC) is currently the leading cause of gynecological cancer deaths. Among malignant tumors of the ovary, epithelial forms have the highest incidence and affect women of both reproductive and old age. The most common metastatic sites...
Zoonotic potential and prevalence of Salmonella serovars isolated from pets
Creators: name: Dróżdż, Mateusz
name: Małaszczuk, Michał
name: Paluch, Emil
name: Pawlak, Aleksandra
Publisher: name: Freie Universität Berlin
Year: 2021
Subjects: subject: Pet animals
subject: zoonotic
subject: transmission
subject: salmonella serovars distribution
subject: pet regulations
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::547 Organische Chemie

description: Salmonellosis is a global health problem, affecting approximately 1.3 billion people annually. Most of these cases are related to food contamination. However, although the majority of Salmonella serovars are pathogenic to humans, animals can be asymptomatic carriers of these bacteria. Nowadays, a wide range of animals is present in human households as pets, including reptiles, amphibians, dogs, cats, ornamental birds, and rodents. Pets contaminate the environment of their owners by shedding the bacteria intermittently in their feaces. In consequence, theyare thought to cause salmonellosis through pet-to-human transmission. Each Salmonella serovar has a different zoonotic potential, which is strongly regulated by stress factors such as transportation, crowding, food deprivation, or temperature. In this review, we summarize the latest reports concerning Salmonella-prevalence and distribution in pets as well as the risk factors and means of prevention of human salmonellosis caused by contact with their pets. Our literature analysis (based on PubMed and Google Scholar databases) is limited to the distribution of Salmonella serovars found in commonly owned pet species. We collected the recent results of studies concerning testing for Salmonella spp. in biological samples, indicating their prevalence in pets, with regard to clinical cases of human salmonellosis.
Applications and connections between twisted equivariant K-theory, quantum mechanics and condensed matter
Creators: name: Sheinbaum Frank, Daniel
Publisher: name: University of British Columbia
Year: 2020

description: The present thesis consists of 2 parts. Chapter 1 is about applications of twisted equivariant K-theory to condensed matter. We consider non-interacting electrons on a half-crystal (a crystal with a boundary), with a gapped bulk condition, under quasi-adiabatic evolution. In A. Adem, O. Antolin, G. Semenoff and D. Sheinbaum JHEP, 2016 we found that Fermi surfaces for these systems under quasi-adiabatic evolution are classified by the K⁻¹-group of the surface Brillouin zone Td⁻¹. Systems with time-reversal and particle-hole symmetry were also considered and we obtained different KR-groups for the different cases. In Chapter 1 I rewrite A. Adem, O. Antolin, G. Semenoff and D. Sheinbaum JHEP, 2016 in a more function-analytic language and further solve technical issues to extend it to include crystallographic symmetries on the directions parallel to the boundary. In Chapter 2 I reproduce the relevant parts of my joint work with C. Okay (C. Okay and D. Sheinbaum arXiv:1905.07723). There we explored a connection between twisted equivariant K-theory to contextuality in quantum mechanics. We also reformulated the sheaf-theoretic framework of S. Abramsky and A. Brandenburger New Journal of Physics, 2011 for contextuality and connect it to another one employing a group cohomology approach of C. Okay, S. Roberts, S.D Bartlett, and R. Raussendorf Quantum Information and Computation, 2017. This leads to the construction of a classifying space for contextuality, from which Wigner functions are classes in its twisted K-theory.
Model for Dissipative Conductance in Fractional Quantum Hall States
Creators: name: d'Ambrumenil, N.
name: Halperin, B. I.
name: Morf, R. H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a model of dissipative transport in the fractional quantum Hall regime. Our model takes account of tunneling through saddle points in the effective potential for excitations created by impurities. We predict the temperature range over which activated behavior is observed and explain why this range nearly always corresponds to around a factor two in temperature in both integer quantum Hall and fractional quantum Hall systems. We identify the ratio of the gap observed in the activated behavior and the temperature of the inflection point in the Arrhenius plot as an important diagnostic for determining the importance of tunneling in real samples.
description: 4 pages, 3 figures, errors in references corrected
title: Intrathoracic foreign bodies a guide to the emergency department
Creators: name: Murakami, Naomi
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Emergency
subject: Thorax
subject: CT
subject: CT-High Resolution
subject: Computer Applications-3D
subject: Contrast agent-intravenous
subject: Foreign bodies

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: Intrathoracic foreign body (FB) findings are a major dilemma for the radiologist, due largely to the lack of a clear history. Imaging tests play a fundamental role, not only in detection (it is estimated that nearly 40% of FB cases can go unnoticed...
title: A Pre-Intervention Scale including Imaging Markers for Predicting Futile Recanalization in Acute Ischemic Stroke Patients with Large Anterior Vessel Occlusion
Creators: name: Cao, Ruoyao
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Neuroradiology brain
subject: CT
subject: Diagnostic procedure
subject: Acute

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: Acute ischemic stroke (AIS) is a prevalent disease that significantly compromises the health and life span of the elderly. It represents a significant cause of morbidity, mortality, and disability worldwide, with more than one-third of AIS cases...
Confinement-induced resonance in quasi-one-dimensional systems under transversely anisotropic confinement
Creators: name: Peng, Shi-Guo
name: Bohloul, Seyyed S.
name: Liu, Xia-Ji
name: Hu, Hui
name: Drummond, Peter D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We theoretically investigate the confinement-induced resonance for quasi-one-dimensional quan- tum systems under transversely anisotropic confinement, using a two-body s-wave scattering model in the zero-energy collision limit. We predict a single resonance for any transverse anisotropy, whose position shows a slight downshift with increasing anisotropy. We compare our prediction with the recent experimental result by Haller et al. [Phys. Rev. Lett. 104, 153203 (2010)], in which two resonances are observed in the presence of transverse anisotropy. The discrepancy between theory and experiment remains to be resolved.
description: 6 pages, 5 figures, accepted for publication in Phys. Rev. A
Gravito-electromagnetic resonances
Creators: name: Tsagas, Christos G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The interaction between gravitational and electromagnetic radiation has a rather long research history. It is well known, in particular, that gravity-wave distortions can drive propagating electromagnetic signals. Since forced oscillations provide the natural stage for resonances to occur, gravito-electromagnetic resonances have been investigated as a means of more efficient gravity-wave detection methods. In this report, we consider the coupling between the Weyl and the Maxwell fields on a Minkowski background, which also applies to astrophysical environments where gravity is weak, at the second perturbative level. We use covariant methods that describe gravitational waves via the transverse component of the shear, instead of pure-tensor metric perturbations. The aim is to calculate the properties of the electromagnetic signal, which emerges from the interaction of its linear counterpart with an incoming gravitational wave. Our analysis shows how the wavelength and the amplitude of the gravitationally driven electromagnetic wave vary with the initial conditions. More specifically, for certain initial data, the amplitude of the induced electromagnetic signal is found to diverge. Analogous, diverging, gravito-electromagnetic resonances were also reported in cosmology. Given that, we extend our Minkowski-space study to cosmology and discuss analogies and differences in the physics and in the phenomenology of the Weyl-Maxwell coupling between the aforementioned two physical environments.
description: Minor changes, to appear in PRD
Diagnosing Spin at the LHC via Vector Boson Fusion
Creators: name: Buckley, Matthew R.
name: Ramsey-Musolf, Michael J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a new technique for determining the spin of new massive particles that might be discovered at the Large Hadron Collider. The method relies on pair-production of the new particles in a kinematic regime where the vector boson fusion production mechanism is enhanced. For this regime, we show that the distribution of the leading jets as a function of their relative azimuthal angle can be used to distinguish spin-0 from spin-1/2 particles. We illustrate this effect by considering the particular cases of (i) strongly-interacting, stable particles and (ii) supersymmetric particles carrying color charge. We argue that this method should be applicable in a wide range of new physics scenarios.
description: 5 pages, 4 figures
The interplay between chemical and mechanical feedback from the first generation of stars
Creators: name: Maio, Umberto
name: Khochfar, Sadegh
name: Johnson, Jarrett L.
name: Ciardi, Benedetta
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study cosmological simulations of early structure formation, including non-equilibrium molecular chemistry, metal pollution from stellar evolution, transition from population III (popIII) to population II (popII) star formation, regulated by a given critical metallicity, and feedback effects. We investigate the properties of early metal spreading from the different stellar populations and its interplay with primordial molecular gas. We find that, independently of the details about popIII modeling, after the onset of star formation, regions enriched below the critical level are mostly found in isolated environments, while popII star formation regions are much more clumped. Typical star forming haloes show average SN driven outflow rates of up to 10^{-4} Msun/yr in enriched gas, initially leaving the original star formation regions almost devoid of metals. The polluted material, which is gravitationally incorporated in over-dense environments on timescales of 10^7 yr, is mostly coming from external, nearby star forming sites ("gravitational enrichment"). In parallel, the pristine-gas inflow rates are between 10^{-3} - 10^{-1} Msun/yr. However, thermal feedback from SN generates turbulence and destroys molecules within the pristine gas, and only the polluted material, incorporated via gravitational enrichment, can continue to cool by atomic metal fine-structure transitions on time scales short enough to end the initial popIII regime within less than 10^8 yr.
description: Accepted on the 31/1/2011
Perceptual learning for expertise
Creators: name: Ransom, Madeleine
Publisher: name: University of British Columbia
Year: 2020

description: What does the expert have that the novice does not? One component of expertise may be perceptual, involving a change in what we are able to perceive. Experts develop the ability to taste the subtle flavours of a wine, hear minute variations in pitch imperceptible to novices, or distinguish shades of red that are indistinguishable to novices. More controversially, experts perceive a bird to be a northern flicker, a shadow on an x-ray to be a tumour, or a painting to be beautiful. This is controversial because a competing explanation is that experts merely apply their extensive background knowledge to selectively attend to the relevant aspects of their perceptual experience, and then make such judgments in cognition. On this explanation there is no substantive change in perceptual experience between novice and expert. In this dissertation I argue against this alternate explanation of expert ability and defend the perceptual expertise thesis: through perceptual learning experts come to perceive high-level properties imperceptible to novices. I do this in part by appealing to empirical studies of perceptual learning and perceptual expertise. The positive account of perceptual expertise I build here allows for the resolution of a puzzle in aesthetics regarding the role of training, and a clarification of the epistemic significance of perceptual learning.
title: Short- and long-term changes of ADC and rF% in patients with bone metastases from breast cancer
Creators: name: Colombo, Alberto
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Bones
subject: Oncology
subject: MR-Diffusion/Perfusion
subject: Segmentation
subject: Metastases

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: Whole-body MRI (WB-MRI) is an established tool for therapy monitoring of bone marrow malignant lesions, given its ability to depict the morphological and functional changes. 1,2 In published guidelines for response assessment of patients with...
Weak Value in Wave Function of Detector
Creators: name: Nakamura, Kouji
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: A simple formula to read out the weak value from the wave function of the measuring device after the postselection with the initial Gaussian profile is proposed. We apply this formula for the weak value to the classical experiment of the realization of the weak measurement by the optical polarization and obtain the weak value for any pre- and post-selections. This formula automatically includes the interference effect which is necessary to yields the weak value as an outcome of the weak measurement.
description: 3 pages, no figures, Published in Journal of the Physical Society of Japan
title: Hepatic accumulation of serum trace elements after long-term parenteral nutrition is associated with increased liver stiffness
Creators: name: Marticorena Garcia, Stephan
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Abdomen
subject: Liver
subject: Elastography
subject: MR
subject: MR-Elastography
subject: Diagnostic procedure
subject: Imaging sequences
subject: Treatment effects
subject: Drugs / Reactions
subject: Inflammation
subject: Tissue characterisation

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: Patients with chronic intestinal failure, e.g. as a result of extensive bowel resection are limited in maintaining their energy and fluid balance orally [1]. Parenteral nutrition is a life-sustaining therapy for this group of patients. Intestinal...
Scrutiny of the so-called Einstein’s Causality
Creators: name: Hassani, Mohamed Elmansour
Publisher: name: figshare
Year: 2021
Subjects: Special Relativity

description: In the present paper, the so-called Einstein’s causality is scrutinized and proven to be an illusion. Causality as a well-established universal principle was and is absolutely valid for subluminal, luminal and superluminal signals under any natural and/or artificial circumstances. It is also shown thatconceptually special relativity theory (SRT) is inapplicable to superluminality of physical phenomena since SRThas the light speed in vacuum as an upper limiting speed in its own proper domain of applications, and also becauseSRT is crucially based on the concept of inertial reference frames (IRFs) which are related to each other by Lorentztransformations, that is why the relative velocity of any two IRFs must be smaller than light speed.
Crossing of $ω=-1$ with Tachyon and Non-minimal Derivative Coupling
Creators: name: Banijamali, A.
name: Fazlpour, B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct a single scalar field model with tachyon field non-minimally coupled to itself, its derivative and to the curvature. We study the cosmological dynamics of the equation of state in this setup. While it is expected that in the case of single scalar field the crossing of the phantom divide line can not be realized [10], we show that incorporating quantum corrections, namely, non-minimal derivative coupling of scalar field with curvature in our model, lead to phantom divide crossing.
description: 11 pages, 2 figures. Some explanations and references added. Accepted for publication in Phys. Lett. B
title: ÐÐ¾Ð±Ð¸Ð»ÑÐ½Ð°Ñ ÑÐ¸ÑÑÐµÐ¼Ð° ÑÑÐµÑÐ° ÑÐ°ÑÑ Ð¾Ð´Ð° ÑÐ»ÐµÐºÑÑÐ¾ÑÐ½ÐµÑÐ³Ð¸Ð¸ Ð² ÑÐ½ÐµÑÐ³ÐµÑÐ¸ÑÐµÑÐºÐ¾Ð¹ ÑÑÐµÑÐµ Ñ ÑÑÐ½ÐºÑÐ¸ÐµÐ¹ Ð¿ÑÐ¾Ð³Ð½Ð¾Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ° Ð¿Ð¾ Ð½Ð°Ð¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ 27.04.03 - Ð¡Ð¸ÑÑÐµÐ¼Ð½ÑÐ¹ Ð°Ð½Ð°Ð»Ð¸Ð· Ð¸ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ðµ ; 27.04.03_01 - Ð¢ÐµÐ¾ÑÐ¸Ñ Ð¸ Ð¼Ð°ÑÐµÐ¼Ð°ÑÐ¸ÑÐµÑÐºÐ¸Ðµ Ð¼ÐµÑÐ¾Ð´Ñ ÑÐ¸ÑÑÐµÐ¼Ð½Ð¾Ð³Ð¾ Ð°Ð½Ð°Ð»Ð¸Ð·Ð° Ð¸ ÑÐ¿ÑÐ°Ð²Ð»ÐµÐ½Ð¸Ñ Ð² ÑÐµÑ Ð½Ð¸ÑÐµÑÐºÐ¸Ñ Ð¸ ÑÐºÐ¾Ð½Ð¾Ð¼Ð¸ÑÐµÐºÐ¸Ñ ÑÐ¸ÑÑÐµÐ¼Ð°Ñ
titleType: Subtitle
Creators: name: Ð Ð°ÑÑÐ¿ÐºÐ¸Ð½Ð°, ÐÐ»ÑÐ³Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019
Subjects: Ð­Ð»ÐµÐºÑÑÐ¸ÑÐµÑÐºÐ°Ñ ÑÐ½ÐµÑÐ³Ð¸Ñ
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description: Ð Ð°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð¿ÑÐ¾Ð³Ð½Ð¾Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ°ÑÑÐ¾Ð´Ð° ÑÐ»ÐµÐºÑÑÐ¾ÑÐ½ÐµÑÐ³Ð¸Ð¸ ÑÑÑÑÐºÑÑÑÐ½ÑÐ¼ Ð¼ÐµÑÐ¾Ð´Ð¾Ð¼ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ Ð¿Ð¾Ð»Ð½Ð¾ÑÐ²ÑÐ·Ð½Ð¾Ð¹ ÑÑÐµÑÑÐ»Ð¾Ð¹Ð½Ð¾Ð¹ Ð½ÐµÐ¹ÑÐ¾Ð½Ð½Ð¾Ð¹ ÑÐµÑÐ¸, Ð¾Ð±ÑÑÐµÐ½Ð½Ð¾Ð¹ Ñ Ð¿Ð¾Ð¼Ð¾ÑÑÑ Ð¼ÐµÑÐ¾Ð´Ð° Ð¾Ð±ÑÐ°ÑÐ½Ð¾Ð³Ð¾ ÑÐ°ÑÐ¿ÑÐ¾ÑÑÑÐ°Ð½ÐµÐ½Ð¸Ñ Ð¾ÑÐ¸Ð±ÐºÐ¸. ÐÐ°Ð½Ð½ÑÐµ Ð´Ð»Ñ Ð¾Ð±ÑÑÐµÐ½Ð¸Ñ Ð½ÐµÐ¹ÑÐ¾Ð½Ð½Ð¾Ð¹ ÑÐµÑÐ¸ Ð±ÑÐ»Ð¸ Ð²Ð·ÑÑÑ Ð½Ð° Ð¾ÑÐ½Ð¾Ð²Ðµ ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ð½Ð¾Ð¹ ÑÐ¸ÑÑÐµÐ¼Ñ ÑÑÐµÑÐ° Ð¿ÑÐ¾Ð³Ð½Ð¾Ð·Ð° ÑÐ»ÐµÐºÑÑÐ¾ÑÐ½ÐµÑÐ³Ð¸Ð¸.
description: The work is devoted to the prediction of energy consumption by a structural method based on a fully connected three-layer neural network, trained using the method of back propagation of error. The data for training the neural network were taken on the basis of the developed electricity metering system.
title: Ð­ÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÑ Ð¸ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¸Ð²Ð½Ð¾ÑÑÑ Ð½Ð°Ð´Ð·Ð¾ÑÐ½Ð¾Ð¹ Ð¸ ÐºÐ¾Ð½ÑÑÐ¾Ð»ÑÐ½Ð¾Ð¹ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ Ð¿ÑÐ¾Ð¼ÑÑÐ»ÐµÐ½Ð½Ð¾Ð¹ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Efficiency and effectiveness of Supervisory and control activities in the field of industrial safety
Creators: name: Ð¨ÐµÐ²ÐµÐ»ÐµÐ²Ð°, ÐÑÐ¸Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2019
Subjects: Ð¿ÑÐ¾Ð¼ÑÑÐ»ÐµÐ½Ð½Ð°Ñ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÑ
Ð¿Ð¾ÐºÐ°Ð·Ð°ÑÐµÐ»Ð¸ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸
ÑÐ¸ÑÐº-Ð¾ÑÐ¸ÐµÐ½ÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð½ÑÐ¹ Ð¿Ð¾Ð´Ñ Ð¾Ð´
industrial safety
performance indicators
risk-based approach

description: Ð ÑÐ°Ð±Ð¾ÑÐµ Ð¸Ð·ÑÑÐ°ÑÑÑÑ Ð¼ÐµÑÐ¾Ð´Ð¸ÐºÐ¸ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ Ð¸ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ ÐºÐ¾Ð½ÑÑÐ¾Ð»ÑÐ½Ð¾Ð¹ Ð¸ Ð½Ð°Ð´Ð·Ð¾ÑÐ½Ð¾Ð¹ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ Ð² ÑÑÐµÑÐµ Ð¿ÑÐ¾Ð¼ÑÑÐ»ÐµÐ½Ð½Ð¾Ð¹ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸. ÐÑÐ¾Ð°Ð½Ð°Ð»Ð¸Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð° Ð½Ð¾ÑÐ¼Ð°ÑÐ¸Ð²Ð½Ð¾-Ð¿ÑÐ°Ð²Ð¾Ð²Ð°Ñ Ð±Ð°Ð·Ð°, ÑÐ²ÑÐ·Ð°Ð½Ð½Ð°Ñ Ñ Ð¾Ð±ÐµÑÐ¿ÐµÑÐµÐ½Ð¸ÐµÐ¼ Ð¿ÑÐ¾Ð¼ÑÑÐ»ÐµÐ½Ð½Ð¾Ð¹ Ð±ÐµÐ·Ð¾Ð¿Ð°ÑÐ½Ð¾ÑÑÐ¸ Ð¸ ÐºÐ¾Ð½ÑÑÐ¾Ð»ÐµÐ¼ Ð·Ð° Ð²ÑÐ¿Ð¾Ð»Ð½ÐµÐ½Ð¸ÐµÐ¼ ÑÑÐµÐ±Ð¾Ð²Ð°Ð½Ð¸Ð¹. Ð Ð°ÑÑÐ¼Ð¾ÑÑÐµÐ½ ÑÐ¸ÑÐº-Ð¾ÑÐ¸ÐµÐ½ÑÐ¸ÑÐ¾Ð²Ð°Ð½Ð½ÑÐ¹ Ð¿Ð¾Ð´ÑÐ¾Ð´, ÐºÐ°Ðº ÑÐ¿Ð¾ÑÐ¾Ð± Ð¿Ð¾Ð²ÑÑÐµÐ½Ð¸Ñ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ Ð¸ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ Ð¾ÑÐ³Ð°Ð½Ð¾Ð² Ð¸ÑÐ¿Ð¾Ð»Ð½Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð¹ Ð²Ð»Ð°ÑÑÐ¸. ÐÑÐ¸Ð²ÐµÐ´ÐµÐ½ ÑÐ°ÑÑÐµÑ Ð¿Ð¾ Ð¾ÑÐµÐ½ÐºÐµ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ Ð¸ ÑÐµÐ·ÑÐ»ÑÑÐ°ÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ ÐºÐ¾Ð½ÑÑÐ¾Ð»ÑÐ½Ð¾Ð¹ Ð¸ Ð½Ð°Ð´Ð·Ð¾ÑÐ½Ð¾Ð¹ Ð´ÐµÑÑÐµÐ»ÑÐ½Ð¾ÑÑÐ¸ Ð½Ð° Ð¿ÑÐ¾Ð¸Ð·Ð²Ð¾Ð´ÑÑÐ²ÐµÐ½Ð½Ð¾Ð¼ Ð¾Ð±ÑÐµÐºÑÐµ.
description: The paper studies the methods of efficiency and effectiveness of control and supervisory activities in the field of industrial safety. The legal framework related to ensuring industrial safety and monitoring compliance with requirements is analyzed. A risk-based approach is considered as a way to increase the efficiency and effectiveness of the activities of executive bodies. The calculation is given to assess the effectiveness and efficiency of control and supervisory activities at the production facility.
Exact Path-Integral Representations for the $T$-Matrix in Nonrelativistic Potential Scattering
Creators: name: Rosenfelder, R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Several path integral representations for the $T$-matrix in nonrelativistic potential scattering are given which produce the complete Born series when expanded to all orders and the eikonal approximation if the quantum fluctuations are suppressed. They are obtained with the help of "phantom" degrees of freedom which take away explicit phases that diverge for asymptotic times. Energy conservation is enforced by imposing a Faddeev-Popov-like constraint in the velocity path integral. An attempt is made to evaluate stochastically the real-time path integral for potential scattering and generalizations to relativistic scattering are discussed.
description: 6 pages, 2 figures. Contribution to the workshop "Relativistic Description of Two- and Three-Body Systems in Nuclear Physics", ETC*, October 19-23, 2009. v2: typo corrected, matches published version + additional references
title: Diagnostic performance of contrast-enhanced digital mammography versus conventional imaging in women with dense breasts.
Creators: name: Maroncelli, Roberto
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Breast
subject: Mammography
subject: Ultrasound
subject: Contrast agent-intravenous
subject: Cancer

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: Contrast-enhanced digital mammography (CEM) is an emerging breast imaging technique combining contrast media administration with dual-energy (low and high energy) standard mammography projections 1 . The aim of this study was to compare the...
Scrutiny of the so-called Einstein’s Causality
Creators: name: Hassani, Mohamed Elmansour
Publisher: name: figshare
Year: 2021
Subjects: Special Relativity

description: In the present paper, the so-called Einstein’s causality is scrutinized and proven to be an illusion, a sort of mathematical fallacy. Causality as a well-established universal principle was and is absolutely valid for subluminal, luminal and superluminal signals under any natural and/or artificial circumstances. It is also shown thatconceptually special relativity theory (SRT) is inapplicable to superluminality of physical phenomena since SRThas the light speed in vacuum as an upper limiting speed in its own proper domain of applications, and also becauseSRT is crucially based on the concept of inertial reference frames (IRFs) which are related to each other by Lorentztransformations, that is why the relative velocity of any two IRFs must be smaller than light speed.
Charged Radial Infall for Spherical Central Bodies
Creators: name: Franklin, J.
name: Morton-Park, F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Classical Physics (physics.class-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A massive, charged, spherical central body can be neutralized by attracting particles of opposite charge. We calculate the time it takes to neutralize these central bodies using classical mechanics, special relativistic mechanics, and finally, the "forced" trajectories of general relativity. While we can compare the classical and (special) relativistic times, and find, predictably, that the special relativistic neutralization time is longer, a comparison of these times with the general relativistic result is not as directly possible. We offer the final calculation as a demonstration of dynamics in a general setting and in particular, the structural similarity of the (general) relativistic problem to the other cases.
title: Ultrasound elastography of thyroid: a primer for radiologists
Creators: name: Pinheiro Lopes, Thiago José
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Thyroid / Parathyroids
subject: Ultrasound physics
subject: Elastography
subject: Ultrasound
subject: Diagnostic procedure
subject: Neoplasia
subject: Tissue characterisation

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: To review the main clinical and technical aspects of ultrasound (US) elastography in thyroid imaging. To provide information and guidance for radiologists when dealing with the main applications of this technique, highlighting tips and pitfalls for...
F.F. Bosworth’s Endorsement of T.L. Osborn’s Most Famous Book: Letter of Support Appeared in Healing the Sick and Casting Out Devils
Creators: name: Barnes III, Roscoe
Publisher: name: figshare
Year: 2018
Subjects: subject: 210304 Biography
subject: FOS: History and archaeology
subject: 220401 Christian Studies (incl. Biblical Studies and Church History)
subject: FOS: Philosophy, ethics and religion
subject: 220402 Comparative Religious Studies
subject: History
subject: 210399 Historical Studies not elsewhere classified
subject: Literature
subject: Religious Studies

description: Copyright (c) 2018 by Roscoe Barnes III
#FFBosworth
This blog post presents for the first time an analysis of F.F. Bosworth's endorsement of Healing the Sick and Casting Out Devils (1955) by T.L. Osborn. It shows that while Bosworth was lavish in his praise of Healing the Sick, Osborn was equally generous in giving credit to Bosworth. Osborn cited Bosworth in several places in his book. He acknowledged using Bosworth's material with permission, and he encouraged readers to purchase Bosworth's books. The article also highlights the similarities between Osborn's Introductory Note and Bosworth's Preface in his book, Christ the Healer (1924).
For more information on F.F. Bosworth, follow the Bosworth Matters blog at: http://ffbosworth.strikingly.com
#ChristTheHealer #BosworthMatters #BosworthMention
Cold atoms in rotating optical lattice with nearest neighbour interaction
Creators: name: Sachdeva, Rashi
name: Johri, Sonika
name: Ghosh, Sankalpa
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Extended Bose Hubbard models with nearest neighbour interaction describe minimally the effect of long range interaction on ultra cold atoms in deep optical lattices. Rotation of such optical lattices subject such neutral cold atoms to the effect of an artificial magnetic field. The modification of the phase boundaries of the density wave and Mott Insulator phases due to this rotation are shown to be related to the edge spectrum of spinorial and scalar Harper equation. Corresponding profiles of the checkerboard vortex states with sublattice modulated superfluid order parameter near density wave phase boundary are calculated.
description: Slightly revised, Accepted in Physical Review A for publication
Cell of origin can change the transcriptome profile of tumors arising from distinct pancreatic cell types
Creators: name: Zarei, Soheila
Publisher: name: University of British Columbia
Year: 2020

description: Both acinar and ductal cells can give rise to PDAC in murine models. However, the gene expression profiles of these tumors, as well as their role in tumor heterogeneity remain unknown. The objective of this study was to understand whether the cellular origin of PDAC could cause functional or molecular heterogeneity. We created PDAC cell lines from mouse models (Sox9CreER;KrasLSL-G12D;Trp53f/f mice a.k.a. Duct:Kras-p53 mice and Ptf1aCreER;KrasLSL-G12D;Trp53f/f a.k.a. Acinar:Kras-p53 mice), which developed tumors originating from ductal or acinar cells, respectively. Duct:Kras-p53 mice formed high grade PanINs, developed PDAC much faster, and had a shorter lifespan compared to Acinar:Kras-p53 mice. In contrast, Acinar:Kras-p53 mice formed abundant of low grade PanINs with mucinous characteristics and PDAC initiation was delayed. I performed differential gene expression analysis between 12 acinar- and 13 ductal-cell-derived tumors using a specific R programming language package called DESeq2. I found 827 differentially expressed genes between tumors of different cellular origin (p-value < 0.05). Of these differentially expressed genes 260 genes were upregulated in ductal-cell-derived PDAC and 567 genes were upregulated in acinar-cell-derived PDAC. The gene enrichment analysis suggests that GO ontology categories “Glycoproteins pathways” and “stomach” were enriched in the transcripts upregulated in acinar-cell-derived tumors only. Keratin 20 (CK20), a marker of mucinous differentiation in the gut, is one of the top 20 differentially expressed genes (log2 fold change=6.1) with enriched expression in acinar-cell-derived tumors. Quantification of the total CK20 and Alcian Blue positive area of tumors indicates that CK20 and the gastric mucinous-gland phenotype indicated by Alcian Blue are positively associated. Other than CK20, components of the Wnt/beta-catenin signaling pathways, including Wnt5a, Wnt10a and Wnt4, were differentially expressed between ductal- and acinar-cell-derived PDAC cell lines. Using an inhibitor of Wnt/beta-catenin signaling pathways, ICG-001, I found that beta-catenin inhibition limited both ductal- and acinar-cell-derived PDAC cell proliferation. This was accompanied by decreased expression of Birc5 and increased Cdkn1a expression, which are suggested to be targets of beta-catenin. Overall, I have shown that cell of origin can have subtle effects on the transcriptome of PDAC and begun to characterize the functional profiles of PDAC of different cellular origins.
Multifractal analysis for Birkhoff averages on Lalley-Gatzouras repellers
Creators: name: Reeve, Henry WJ
Publisher: name: arXiv
Year: 2010
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: We consider the multifractal analysis for Birkhoff averages of continuous potentials on a class of non-conformal repellers corresponding to the self-affine limit sets studied by Lalley and Gatzouras. A conditional variational principle is given for the Hausdorff dimension of the set of points for which the Birkhoff averages converge to a given value. This extends a result of Barral and Mensi to certain non-conformal maps with a measure dependent Lyapunov exponent.
description: 22 pages, 1 figure
Open inflation in the landscape
Creators: name: Yamauchi, Daisuke
name: Linde, Andrei
name: Naruko, Atsushi
name: Sasaki, Misao
name: Tanaka, Takahiro
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Open inflation scenario is attracting a renewed interest in the context of string landscape. Since there are a large number of metastable de Sitter vacua in string landscape, tunneling transitions to lower metastable vacua through the bubble nucleation occur quite naturally. Although the deviation of Omega_0 from unity is small by the observational bound, we argue that the effect of this small deviation on the large angle CMB anisotropies can be significant for tensor-type perturbation in open inflation scenario. We consider the situation in which there is a large hierarchy between the energy scale of the quantum tunneling and that of the slow-roll inflation in the nucleated bubble. If the potential just after tunneling is steep enough, a rapid-roll phase appears before the slow-roll inflation. In this case the power spectrum is basically determined by the Hubble rate during the slow-roll inflation. If such rapid-roll phase is absent, the power spectrum keeps the memory of the high energy density there in the large angular components. The amplitude of large angular components can be enhanced due to the effects of the wall fluctuation mode if the bubble wall tension is small. Therefore, one can construct some models in which the deviation of Omega_0 from unity is large enough to produce measurable effects. We also consider a more general class of models, where the false vacuum decay may occur due to Hawking-Moss tunneling, as well as the models involving more than one scalar field. We discuss scalar perturbations in these models and point out that a large set of such models is already ruled out by observational data, unless there was a very long stage of slow-roll inflation after the tunneling. These results show that observational data allow us to test various assumptions concerning the structure of the string theory potentials and the duration of the last stage of inflation.
description: 14 pages, 11 figures, v2:minor corrections and a reference added, v3:accepted for publication in PRD
title: Imaging of infectious conditions of male genitalia and potential complications
Creators: name: MORIÑIGO MAZO, DANIEL
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Emergency
subject: Genital / Reproductive system male
subject: CT
subject: Ultrasound
subject: Abscess delineation
subject: Abscess

description: Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References
description: Learning objectives: The aim of this poster is to review a series of infectious conditions that affect the male genitalia and their potential...
title: Multi-sequence MRI Radiomics in Colorectal Liver Metastases: Which features are stable across readers?
Creators: name: Maas, Monique
Publisher: name: European Congress of Radiology
Year: 2023
Subjects: subject: Abdomen
subject: Artificial Intelligence
subject: Oncology
subject: MR
subject: Imaging sequences
subject: Segmentation
subject: Metastases

description: Purpose Methods and materials Results Conclusion Personal information and conflict of interest References
description: Purpose: Radiomics is described as a new fast evolving field in radiology in which medical images are converted in quantitative data.[1] This data is can be analysed using machine learning and can then be used for classification or prediction tasks with the...
Bilayers in amphiphilic mixtures connected by threadlike micelles: a self-consistent field theory study
Creators: name: Greenall, M. J.
name: Gompper, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Binary mixtures of amphiphiles in solution can self-assemble into a wide range of structures when the two species individually form aggregates of different curvatures. A specific example of this is seen in solutions of lipid mixtures where the two species form lamellar structures and spherical micelles respectively. Here, vesicles connected by thread-like micelles can form in a narrow concentration range of the sphere-forming lipid. We present a self-consistent field theory (SCFT) study of these structures. Firstly, we show that the addition of sphere-forming lipid to a solution of lamella-former can lower the free energy of cylindrical, thread-like micelles and hence encourage their formation. Next, we demonstrate the coupling between composition and curvature; specifically, that increasing the concentration of sphere-former in a system of two bilayers connected by a thread leads to a transfer of amphiphile to the thread. We further show that the two species are segregated within the structure, with the concentration of sphere-former being significantly higher in the thread. Finally, the addition of larger amounts of sphere-former is found to destabilize the junctions linking the bilayers to the cylindrical micelle, leading to a breakdown of the connected structures. The degree of segregation of the amphiphiles and the amount of sphere-former required to destabilize the junctions is shown to be sensitive to the length of the hydrophilic block of the sphere-forming amphiphiles.
description: 16 pages plus 10 figures; preprint format; submitted to Langmuir