cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Students' International Network for Astronomy and its Projects for Sustainable Development
Creators: name: Rokni, Mahdi
Publisher: name: Zenodo
Year: 2023
Subjects: Astronomy Education

description: Title: Students' International Network for Astronomy and its Projects for Sustainable Development

Presenter: Mahdi Rokni (Commission C1 WG Astronomy Education Research & Methods; Manager of Students' International Network for Astronomy (SINA), Itan)

Colaborator:Akihiko Tomita (Commission C1 WG Astronomy Education Research & Methods)Saba Izadi (Commission C1 WG Astronomy Education Research & Methods)Melika Gonbadi (Commission C1 WG Astronomy Education Research & Methods)

 

This was a poster presented at the 5th Shaw-IAU Workshop on Astronomy for Education, organised by the IAU Office of Astronomy for Education (OAE, http//astro4edu.org).

This network has been established by students in a small city in the south of Iran. It was a desire to globalize all the activities and plans that they have been carrying out in Mehr observatory. Some of these activities contain a lot of social skills and different methods for students to do. The main aims of this network are Involving students in astronomical programs and projects, preparing a reliable structure for students around the world to meet each other using astronomy as a link, using the methods of sustainable development to teach students about the global environmental concerns and world peace, letting students make friends with each other without limitation and introducing their own culture.About the 5th Shaw-IAU Workshop on Astronomy for Education:This year’s Shaw-IAU Workshop on Astronomy for Education focuses on two themes: one special practical astronomy education topic and one scientific topic. The special topic is astronomy education outside the classroom, looking at how astronomy can be taught in a diverse range of environments such as science centers, planetaria and youth clubs. The scientific topic is planetary atmospheres, both in the solar system and exoplanets as well as our own Earth. The workshop was organised by the IAU Office of Astronomy for Education (http://astro4edu.org). More details can be found on: https://astro4edu.org/shaw-iau/5th-shaw-iau-workshop/schedule/

Keep up to date with future Shaw-IAU Workshops and other opportunities at the IAU Office of Astronomy for Education by joining our mailing list https://astro4edu.org/mailing-list/

Follow the IAU OAE on X and Facebook under @astro4edu
Insect-Friendly Path Margins and Diverse Stakeholder Perspectives - A Dialogue And Communication Strategy For The Agricultural Landscape On The Left Bank Of Rhine-Sieg District, Germany
Creators: name: Fischer, Silvia
name: Terlau, Wiltrud
Publisher: name: Proceedings in Food System Dynamics
Year: 2023

description: In intensively used agricultural landscapes, path margins are one of the few refuges and nurseries for wildlife. They provide e. g. food sources and overwintering opportunities for many insects, serve as migration corridors for animals, protect soil from erosion, increase its water-holding capacity, and increase soil organic carbon, contributing thus directly to biodiversity conservation and climate change mitigation. Path margins are often municipally owned but used and managed by agriculture. For a path margin to be functional, certain conditions must be fulfilled, such as the width, the botanical composition, and how it is managed through the seasons. Therefore, it must be managed under specific requirements. A multifunctional path margin can be achieved only through the commitment of all stakeholders (e.g., farmers, municipalities, conservationists, and civil society).
In this study, we assessed the different stakeholders' perspectives in implementing an insect-friendly path margins project in the agricultural landscape on the left bank of the Rhine between the Eifel and the Rhine in the German Rhine-Sieg district developing and implementing a communication strategy. Three main activities were implemented: (1) A Q-Study build the basis for a (2 ) local stakeholder dialogue workshop and (3) the development of social media materials to communicate project activities.Part of the communication strategy was the Q-Method. This method allowed us to identify the different positions of stakeholders regarding municipal blooming path margins. Through a literature review, 65 statements on insect protection in path margins were pre-selected (first stage), and an additional expert survey was implemented to validate this pre-selection. After the validation of experts and the merging of similar statements, a set of 35 statements was identified as the Q-Sample (second stage), further this 35-statement set was used in a stakeholder survey to rank and sort according to the own stakeholder's views ( Q-Sort, third stage), data was analyzed using factor analysis (fourth stage). As a result, two main factors or perspectives were found: A) perspective on insect-friendly protection measures and, B) perspective on the maintenance and avoidance of negative effects. Finally, these different perspectives were presented and discussed in a stakeholder workshop contributing to the project's communication activities and setting the basis to discuss further project activities taking into account the identified perspectives from local stakeholders.
description: Proceedings in Food System Dynamics, PROCEEDINGS IN SYSTEM DYNAMICS AND INNOVATION IN FOOD NETWORKS 2023
Fillings of unit cotangent bundles of nonorientable surfaces
Creators: name: Li, Youlin
name: Ozbagci, Burak
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geometric Topology (math.GT)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: We prove that any minimal weak symplectic filling of the canonical contact structure on the unit cotangent bundle of a nonorientable closed surface other than the real projective plane is s-cobordant rel boundary to the disk cotangent bundle of the surface. If the nonorientable surface is the Klein bottle, then we show that the minimal weak symplectic filling is unique up to homeomorphism.
description: 13 pages, 1 figure
NMR parameters in gapped graphene systems
Creators: name: Crisan, M.
name: Grosu, I.
name: Tifrea, I.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We calculate the nuclear spin-lattice relaxation time and the Knight shift for the case of gapped graphene systems. Our calculations consider both the massive and massless gap scenarios. Both the spin-lattice relaxation time and the Knight shift depend on temperature, chemical potential, and the value of the electronic energy gap. In particular, at the Dirac point, the electronic energy gap has stronger effects on the system nuclear magnetic resonance parameters in the case of the massless gap scenario. Differently, at large values of the chemical potential, both gap scenarios behave in a similar way and the gapped graphene system approaches a Fermi gas from the nuclear magnetic resonance parameters point of view. Our results are important for nuclear magnetic resonance measurements that target the $^{13}$C active nuclei in graphene samples.
On-board monitoring of 2-D spatially-resolved temperatures in cylindrical lithium-ion batteries: Part II. State estimation via impedance-based temperature sensing
Creators: name: Richardson, Robert R.
name: Zhao, Shi
name: Howey, David A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 93

description: Impedance-based temperature detection (ITD) is a promising approach for rapid estimation of internal cell temperature based on the correlation between temperature and electrochemical impedance. Previously, ITD was used as part of an Extended Kalman Filter (EKF) state-estimator in conjunction with a thermal model to enable estimation of the 1-D temperature distribution of a cylindrical lithium-ion battery. Here, we extend this method to enable estimation of the 2-D temperature field of a battery with temperature gradients in both the radial and axial directions. An EKF using a parameterised 2-D spectral-Galerkin model with ITD measurement input (the imaginary part of the impedance at 215 Hz) is shown to accurately predict the core temperature and multiple surface temperatures of a 32113 LiFePO$_4$ cell, using current excitation profiles based on an Artemis HEV drive cycle. The method is validated experimentally on a cell fitted with a heat sink and asymmetrically cooled via forced air convection. A novel approach to impedance-temperature calibration is also presented, which uses data from a single drive cycle, rather than measurements at multiple uniform cell temperatures as in previous studies. This greatly reduces the time required for calibration, since it overcomes the need for repeated cell thermal equalization.
description: 11 pages, 8 figures, submitted to the Journal of Power Sources
Adaptive Online Sequential ELM for Concept Drift Tackling
Creators: name: Budiman, Arif
name: Fanany, Mohamad Ivan
name: Basaruddin, Chan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences
subject: I.2.4
subject: 68Txx

description: A machine learning method needs to adapt to over time changes in the environment. Such changes are known as concept drift. In this paper, we propose concept drift tackling method as an enhancement of Online Sequential Extreme Learning Machine (OS-ELM) and Constructive Enhancement OS-ELM (CEOS-ELM) by adding adaptive capability for classification and regression problem. The scheme is named as adaptive OS-ELM (AOS-ELM). It is a single classifier scheme that works well to handle real drift, virtual drift, and hybrid drift. The AOS-ELM also works well for sudden drift and recurrent context change type. The scheme is a simple unified method implemented in simple lines of code. We evaluated AOS-ELM on regression and classification problem by using concept drift public data set (SEA and STAGGER) and other public data sets such as MNIST, USPS, and IDS. Experiments show that our method gives higher kappa value compared to the multiclassifier ELM ensemble. Even though AOS-ELM in practice does not need hidden nodes increase, we address some issues related to the increasing of the hidden nodes such as error condition and rank values. We propose taking the rank of the pseudoinverse matrix as an indicator parameter to detect underfitting condition.
description: Hindawi Publishing. Computational Intelligence and Neuroscience Volume 2016 (2016), Article ID 8091267, 17 pages Received 29 January 2016, Accepted 17 May 2016. Special Issue on "Advances in Neural Networks and Hybrid-Metaheuristics: Theory, Algorithms, and Novel Engineering Applications". Academic Editor: Stefan Haufe
Thermal analysis of photon-like particles in rainbow gravity
Creators: name: Filho, A. A. Araújo
name: Furtado, J.
name: Hassanabadi, H.
name: Reis, J. A. A. S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This work is devoted to study the thermodynamic behavior of photon--like particles within the \textit{rainbow} gravity formalism. To to do this, we chose two particular ansatzs to accomplish our calculations. First, we consider a dispersion relation which avoids UV divergences, getting a positive effective cosmological constant. We provide \textit{numerical} analysis for the thermodynamic functions of the system and bounds are estimated. Furthermore, a phase transition is also expected for this model. Second, we consider a dispersion relation employed in the context of \textit{Gamma Ray Bursts}. Remarkably, for this latter case, the thermodynamic properties are calculated in an \textit{analytical} manner and they turn out to depend on the harmonic series $H_{n}$, gamma $Γ(z)$, polygamma $ψ_{n}(z)$ and zeta Riemann functions $ζ(z)$.
description: 22 pages, 7 figures
Home Astronomy for Early Childhood and its Assessment
Creators: name: Tomita, Akihiko
Publisher: name: Zenodo
Year: 2023
Subjects: Astronomy Education

description: Title: Home Astronomy for Early Childhood and its Assessment

Presenter: Akihiko Tomita (Wakayama University, Japan)

Colaborator:Takuya Kotani (Osaka Ohtani University, Japan)Yoshiko Nagase (Osaka Ohtani University, Japan)Yukiko Takegawa (Science Planning Office for Kids, Japan)Hiromi Tsuji (Osaka Shoin Women’s University, Japan)

 

This was a poster presented at the 5th Shaw-IAU Workshop on Astronomy for Education, organised by the IAU Office of Astronomy for Education (OAE, http//astro4edu.org).

Young children interact with their surroundings, things, objects, and nature, and through “trying one more time,” they enjoy observing and building concepts. This is also the case for the subject of astronomy. We present records of the interests and behaviors of 3 to 5-year-old children regarding the evening sky, clouds, colors, rainbows, the first stars, and the movement of the stars. In addition, we present our study of the assessment methods used. We also discuss how such assessment is positioned within early childhood science education in general, and how it relates to science formal school education.About the 5th Shaw-IAU Workshop on Astronomy for Education:This year’s Shaw-IAU Workshop on Astronomy for Education focuses on two themes: one special practical astronomy education topic and one scientific topic. The special topic is astronomy education outside the classroom, looking at how astronomy can be taught in a diverse range of environments such as science centers, planetaria and youth clubs. The scientific topic is planetary atmospheres, both in the solar system and exoplanets as well as our own Earth. The workshop was organised by the IAU Office of Astronomy for Education (http://astro4edu.org). More details can be found on: https://astro4edu.org/shaw-iau/5th-shaw-iau-workshop/schedule/

Keep up to date with future Shaw-IAU Workshops and other opportunities at the IAU Office of Astronomy for Education by joining our mailing list https://astro4edu.org/mailing-list/

Follow the IAU OAE on X and Facebook under @astro4edu
Lattice Percolation Approach to 3D Modeling of Tissue Aging
Creators: name: Gorshkov, Vyacheslav
name: Privman, Vladimir
name: Libert, Sergiy
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We describe a 3D percolation-type approach to modeling of the processes of aging and certain other properties of tissues analyzed as systems consisting of interacting cells. Lattice sites are designated as regular (healthy) cells, senescent cells, or vacancies left by dead (apoptotic) cells. The system is then studied dynamically with the ongoing processes including regular cell dividing to fill vacant sites, healthy cells becoming senescent or dying, and senescent cells dying. Statistical-mechanics description can provide patterns of time dependence and snapshots of morphological system properties. The developed theoretical modeling approach is found not only to corroborate recent experimental findings that inhibition of senescence can lead to extended lifespan, but also to confirm that, unlike 2D, in 3D senescent cells can contribute to tissue's connectivity/mechanical stability. The latter effect occurs by senescent cells forming the second infinite cluster in the regime when the regular (healthy) cell's infinite cluster still exits.
Park of Sunclocks in Horodnic  De Jos - Romania
Creators: name: Naghi, Elisabeta Ana
Publisher: name: Zenodo
Year: 2023
Subjects: Astronomy Education

description: Title: Park of Sunclocks in Horodnic  De Jos - Romania

Presenter: Elisabeta Ana Naghi (Nationa Education Ministry, Romania)

Colaborator:Dimirie Olenici (Teacher, Romania)

 

This was a poster presented at the 5th Shaw-IAU Workshop on Astronomy for Education, organised by the IAU Office of Astronomy for Education (OAE, http//astro4edu.org).

In Horodnic de Jos (Romania) since 2006 we can visit the Private Popular Planetarium From 2023, the planetarium with its specific activity, there we can find an open-air park with sundials, of various types: vertical, vertical with two sides - it shows the hours between 6 am and 6 pm on the southern face and on the northern face it can show the hours between 4-6 am and 6-8 pm in the summer, horizontal, equatorial and one human. In this place the public, the local community, tourists in the country and abroad come to learn to build sundials, to visit the table of time - which shows us the role of the Egyptian obelisk, the origin of the names of the days of the week and the zodiac signs. Visitors can also learn here about Earth Movements, hours, time zones and the equation of time.About the 5th Shaw-IAU Workshop on Astronomy for Education:This year’s Shaw-IAU Workshop on Astronomy for Education focuses on two themes: one special practical astronomy education topic and one scientific topic. The special topic is astronomy education outside the classroom, looking at how astronomy can be taught in a diverse range of environments such as science centers, planetaria and youth clubs. The scientific topic is planetary atmospheres, both in the solar system and exoplanets as well as our own Earth. The workshop was organised by the IAU Office of Astronomy for Education (http://astro4edu.org). More details can be found on: https://astro4edu.org/shaw-iau/5th-shaw-iau-workshop/schedule/

Keep up to date with future Shaw-IAU Workshops and other opportunities at the IAU Office of Astronomy for Education by joining our mailing list https://astro4edu.org/mailing-list/

Follow the IAU OAE on X and Facebook under @astro4edu
A short survey of matter-antimatter evolution in the primordial universe
Creators: name: Rafelski, Johann
name: Birrell, Jeremiah
name: Steinmetz, Andrew
name: Yang, Cheng Tao
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We offer a survey of the matter-antimatter evolution within the primordial Universe. While the origin of the tiny matter-antimatter asymmetry has remained one of the big questions in modern cosmology, antimatter itself has played a large role for much of the Universe's early history. In our study of the evolution of the Universe we adopt the position of the standard model $Λ$-CDM Universe implementing the known baryonic asymmetry. We present the composition of the Universe across its temperature history while emphasizing the epochs where antimatter content is essential to our understanding. Special topics we address include the heavy quarks in quark-gluon plasma (QGP), the creation of matter from QGP, the free-streaming of the neutrinos, the vanishing of the muons, the magnetism in the electron-positron cosmos, and a better understanding of the environment of the Big Bang Nucleosynthesis (BBN) producing the light elements. We suggest but do not explore further that the methods used in exploring the early Universe may also provide new insights in the study of exotic stellar cores, magnetars, as well as gamma-ray burst (GRB) events. We describe future investigations required in pushing known physics to its extremes in the unique laboratory of the matter-antimatter early Universe.
description: 52 pages, 25 figures (some double) Remo Ruffini Festschrift
Cygnus X-3: Its Little Friend's Counterpart, the Distance to Cygnus X-3, and Outflows/Jets
Creators: name: McCollough, Michael
name: Corrales, Lia
name: Dunham, Michael
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Chandra observations have revealed a feature,within 16" of Cygnus X-3 which varied in phase with Cygnus X-3. This feature was shown to be a Bok globule which is along the line of sight to Cygnus X-3. We report on observations made with Submillimeter Array (SMA) to search for molecular emission from this globule, also known as Cygnus X-3's "Little Friend" (LF). We have found a counterpart in both 12CO (2-1) and 13}CO (2-1) emission. From the velocity shift of the molecular lines, we are able to find two probable distances based on the Bayesian model of Milky Way kinematics of Reid et al. 2016. For the LF velocity of -47.5 km/s, we get a distance of 6.1 +/- 0.6 kpc (62% probability) and 7.8 +/- 0.6 ~kpc (38% probability). This yields a distance to Cyg X-3 of 7.4 +/- 1.1 kpc and 10.2 +/-1.2 ~kpc, respectively. Based on the probabilities entailed, we take 7.4 +/- 1.1 kpc as the preferred distance to Cyg X-3. We also report the discovery of bipolar molecular outflow, suggesting that there is active star formation occurring within the Little Friend.
description: 19 pages, 5 figures, 1 movie, Accepted for publication in ApJL
Coupling of $t\bar t$ and $γγ$ with a strongly interacting Electroweak Symmetry Breaking Sector
Creators: name: Delgado, Rafael L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report the coupling of an external $γγ$ or $t\bar t$ state to a strongly interacting EWSBS satisfying unitarity. We exploit perturbation theory for those coupling of the external state, whereas the EWSBS is taken as strongly interacting. We use a modified version of the IAM unitarization procedure to model such a strongly interacting regime. The matrix elements $V_LV_L\to V_LV_L$, $V_LV_L\leftrightarrow hh$, $hh\to hh$, $V_LV_L\leftrightarrow\{γγ,t\bar t\}$, and $hh\leftrightarrow\{γγ,t\bar t\}$ are all computed to NLO in perturbation theory with the Nonlinear Effective Field Theory of the EWSBS, within the Equivalence Theorem. This allows us to describe resonances of the electroweak sector that may be found at the LHC and their effect on other channels such as $γγ$ or $t\bar t$ where they may be discovered.
description: 9 pages, 3 figures. Contributions to the Procs. of the XIIth Quark Confinement and the Hadron Spectrum, Thessaloniki, Greece, August 2016
Tests of the Charge Convexity Conjecture in Caswell-Banks-Zaks Theory
Creators: name: Aharony, Ofer
name: Breitstein, Yacov-Nir
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Charge Convexity Conjecture (CCC) states that in a unitary conformal field theory in $d\geq 3$ dimensions with a global symmetry, the minimal dimension of operators in certain representations of the symmetry, as a function of the charge $q$ of the representation (or a generalized notion of it), should be convex. More precisely, this was conjectured to be true when $q$ is restricted to positive integer multiples of some integer $q_0$. The CCC was tested on a number of examples, most of which are in $d<4$ dimensions, and its version in which $q_0$ is taken to be the charge of the lowest-dimension positively-charged operator was shown to hold in all of them. In this paper we test the conjecture in a non-trivial example of a $d=4$ theory, which is the family of Caswell-Banks-Zaks IR fixed points of $SU(N_c)$ gauge theory coupled to $N_f$ massless fermions and $N_s$ massless scalars. In these theories, the lowest-dimension gauge-invariant operators that transform non-trivially under the global symmetry are mesons. These may consist of two scalars, two fermions or one of each. We find that the CCC holds in all applicable cases, providing significant new evidence for its validity, and suggesting a stronger version for non-simple global symmetry groups.
description: 27 pages, 13 figures. v2: added reference. v3: added reference to published version, corrected typing errors
Orcovita holthuisi Ng & Ng 2009
Creators: name: Stasolla, Gianluca
name: Innocenti, Gianna
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy

description: Orcovita holthuisi Ng & Ng, 2009  (Figs. 1, 2)
 Orcovita holthuisi Ng & Ng, 2009: 1098, figs. 1–4.
 Material examined. 3 females (12.3 × 10.0 mm; 10.9 × 9.4 mm; 10.1 × 8.7 mm) (MZUF 3922), Philippines, Coron Island, Pukaway Cave, coll. R. Berti & S. Meggiorini, 15 March 1991.
 Remarks. The three females, collected from the type locality, are comparable with the specimens described by Ng & Ng (2009).
description: Published as part of Stasolla, Gianluca & Innocenti, Gianna, 2014, A new species of cavernicolous crab from Coron Island, Palawan, the Philippines (Decapoda: Brachyura: Varunidae), pp. 591-599 in Raffles Bulletin Of Zoology 62 on page 592, DOI: 10.5281/zenodo.13609085
Synthesis of elements in compact stars in pycnonuclear reactions with Carbon isotopes: Quasibound states versus states of zero-points vibrations
Creators: name: Maydanyuk, Sergei P.
name: Wolf, Gyorgy
name: Shaulskyi, Kostiantyn A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: (1) Purpose: Conditions of formation of compound nuclear system needed for synthesis of heavy nuclei in pycnonuclear reactions in compact stars are studied on a quantum mechanical basis. (2) Methods: Method of multiple internal reflections is generalized for pycnoreactions in compact stars with new calculations of quasibound spectra and spectra of zero-point vibrations. (3) Results: Peculiarities of the method are analyzed for reaction with isotopes of Carbon. The developed method takes into account continuity and conservation of quantum flux (describing pycnonuclear reaction) inside the full spacial region of reaction including nuclear region. This gives appearance of new states (called as quasibound states), in which compound nuclear systems of Magnesium are formed with the largest probability. These states have not been studied yet in synthesis of elements in stars. Energy spectra of zero-point vibrations and spectra of quasibound states are estimated with high precision for reactions with isotopes of Carbon. At the first time influence of plasma screening on quasibound states and states of zero-point vibrations in pycnonuclear reactions has been studied. (4) Conclusion: The probability of formation of compound nuclear system in quasibound states in pycnonuclear reaction is essentially larger than the probability of formation of this system in states of zero-point vibrations studied by Zel'dovich and followers. So, synthesis of Magnesium from isotopes of Carbon is more probable through the quasibound states than through the states of zero-point vibrations in compact stars. Energy spectra of zero-point vibrations are changed essentially after taking plasma screening into account. Analysis shows that from all studied isotopes of Magnesium only \isotope[24]{Mg} is stable after synthesis at energy of relative motion of 4.881~MeV of incident nuclei \isotope[12]{C}.
description: 15 pages, 4 captured figures, 4 captured tables. arXiv admin note: text overlap with arXiv:2205.13895
Query Optimization Techniques In Graph Databases
Creators: name: Ammar, Ali Ben
Publisher: name: arXiv
Year: 2016
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Graph databases (GDB) have recently been arisen to overcome the limits of traditional databases for storing and managing data with graph-like structure. Today, they represent a requirement for many applications that manage graph-like data, like social networks. Most of the techniques, applied to optimize queries in graph databases, have been used in traditional databases, distribution systems... or they are inspired from graph theory. However, their reuse in graph databases should take care of the main characteristics of graph databases, such as dynamic structure, highly interconnected data, and ability to efficiently access data relationships. In this paper, we survey the query optimization techniques in graph databases. In particular, we focus on the features they have introduced to improve querying graph-like data.
Exploring the Cosmos: Enriching Astronomy Education Beyond the Classroom
Creators: name: Raj, Abhi
Publisher: name: Zenodo
Year: 2023
Subjects: Astronomy Education

description: Title: Exploring the Cosmos: Enriching Astronomy Education Beyond the Classroom

Presenter: Abhi Raj (University of Delhi, India)

 

This was a poster presented at the 5th Shaw-IAU Workshop on Astronomy for Education, organised by the IAU Office of Astronomy for Education (OAE, http//astro4edu.org).

This study explores creative astronomy education methods, such as virtual observatories, citizen science initiatives, mobile planetariums, and interactive internet platforms, to enhance learning experiences outside traditional classroom settings. The research examines the impact of these techniques on students' conceptual knowledge, excitement for astronomy, and scientific inquiry abilities. The study also examines obstacles and advantages, such as accessibility, teacher training, and assessment. Adopting these techniques can foster a deeper appreciation for the universe, critical thinking abilities, and a lifetime enthusiasm for science.About the 5th Shaw-IAU Workshop on Astronomy for Education:This year’s Shaw-IAU Workshop on Astronomy for Education focuses on two themes: one special practical astronomy education topic and one scientific topic. The special topic is astronomy education outside the classroom, looking at how astronomy can be taught in a diverse range of environments such as science centers, planetaria and youth clubs. The scientific topic is planetary atmospheres, both in the solar system and exoplanets as well as our own Earth. The workshop was organised by the IAU Office of Astronomy for Education (http://astro4edu.org). More details can be found on: https://astro4edu.org/shaw-iau/5th-shaw-iau-workshop/schedule/

Keep up to date with future Shaw-IAU Workshops and other opportunities at the IAU Office of Astronomy for Education by joining our mailing list https://astro4edu.org/mailing-list/

Follow the IAU OAE on X and Facebook under @astro4edu
Origin and magnitude of 'designer' spin-orbit interaction in graphene on semiconducting transition metal dichalcogenides
Creators: name: Wang, Zhe
name: Ki, Dong-Keun
name: Khoo, Jun Yong
name: Mauro, Diego
name: Berger, Helmuth
name: Levitov, Leonid S.
name: Morpurgo, Alberto F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We use a combination of experimental techniques to demonstrate a general occurrence of spin-orbit interaction (SOI) in graphene on transition metal dichalcogenide (TMD) substrates. Our measurements indicate that SOI is ultra-strong and extremely robust, despite it being merely interfacially-induced, with neither graphene nor the TMD substrates changing their structure. This is found to be the case irrespective of the TMD material used, of the transport regime, of the carrier type in the graphene band, and of the thickness of the graphene multilayer. Specifically, we perform weak antilocalization measurements as the simplest and most general diagnostic of SOI, and show that the spin relaxation time is very short in all cases regardless of the elastic scattering time. Such a short spin-relaxation time strongly suggests that the SOI originates from a modification of graphene band structure. We confirmed this expectation by measuring a gate-dependent beating, and a corresponding frequency splitting, in the low-field Shubnikov-de Haas magneto-resistance oscillations in high quality bilayer graphene on WSe$_2$. These measurements provide an unambiguous diagnostic of a SOI-induced splitting in the electronic band structure, and their analysis allows us to determine the SOI coupling constants for the Rashba term and the so-called spin-valley coupling term, i.e., the terms that were recently predicted theoretically for interface-induced SOI in graphene. The magnitude of the SOI splitting is found to be on the order of 10 meV, more than 100 times greater than the SOI intrinsic to graphene. Both the band character of the interfacially induced SOI, as well as its robustness and large magnitude make graphene-on-TMD a promising system to realize and explore a variety of spin-dependent transport phenomena, such as, in particular, spin-Hall and valley-Hall topological insulating states.
description: 14 pages, 8 figures
QHDL: a Low-Level Circuit Description Language for Quantum Computing
Creators: name: Netzer, Gilbert
name: Markidis, Stefano
Publisher: name: arXiv
Year: 2023
Subjects: subject: Emerging Technologies (cs.ET)
subject: FOS: Computer and information sciences

description: This paper proposes a descriptive language called QHDL, akin to VHDL, to program gate-based quantum computing systems. Unlike other popular quantum programming languages, QHDL targets low-level quantum computing programming and aims to provide a common framework for programming FPGAs and gate-based quantum computing systems. The paper presents an initial implementation and design principles of the QHDL framework, including a compiler and quantum computer simulator. We discuss the challenges of low-level integration of streaming models and quantum computing for programming FPGAs and gate-based quantum computing systems.
description: 4 pages, 7 figures, to be published in Proceedings of the 20th ACM International Conference on Computing Frontiers, May 9-11, 2023, Bologna, Italy
A Computational Workflow for Designing Silicon Donor Qubits
Creators: name: Humble, Travis S.
name: Ericson, M. Nance
name: Jakowski, Jacek
name: Huang, Jingsong
name: Britton, Charles
name: Curtis, Franklin G.
name: Dumitrescu, Eugene F.
name: Mohiyaddin, Fahd A.
name: Sumpter, Bobby G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Emerging Technologies (cs.ET)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Developing devices that can reliably and accurately demonstrate the principles of superposition and entanglement is an on-going challenge for the quantum computing community. Modeling and simulation offer attractive means of testing early device designs and establishing expectations for operational performance. However, the complex integrated material systems required by quantum device designs are not captured by any single existing computational modeling method. We examine the development and analysis of a multi-staged computational workflow that can be used to design and characterize silicon donor qubit systems with modeling and simulation. Our approach integrates quantum computational chemistry calculations with electrostatic field solvers to perform detailed simulations of a phosphorus dopant in silicon. We show how atomistic details can be synthesized into an operational model for the logical gates that define quantum computation in this particular technology. The resulting computational workflow realizes a design tool for silicon donor qubits that can help verify and validate current and near-term experimental devices.
description: 21 pages, 8 figures; A smart model is a good model
Mapping the Microscale Origins of MRI Contrast with Subcellular NV Diamond Magnetometry
Creators: name: Davis, Hunter C.
name: Ramesh, Pradeep
name: Bhatnagar, Aadyot
name: Lee-Gosselin, Audrey
name: Barry, John F.
name: Glenn, David R.
name: Walsworth, Ronald L.
name: Shapiro, Mikhail G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Medical Physics (physics.med-ph)
subject: Biological Physics (physics.bio-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Magnetic resonance imaging (MRI) is a widely used biomedical imaging modality that derives much of its contrast from microscale magnetic field gradients in biological tissues. However, the connection between these sub-voxel field patterns and MRI contrast has not been studied experimentally. Here, we describe a new method to map subcellular magnetic fields in mammalian cells and tissues using nitrogen vacancy diamond magnetometry and connect these maps to voxel-scale MRI contrast, providing insights for in vivo imaging and contrast agent design.
Simulating Network Link Compression in Loss-less Wireless Sensor Networks (WSNs) Environment
Creators: name: Teymourzadeh, Rozita
Publisher: name: figshare
Year: 2022
Subjects: Computer Engineering

description: Communication among wireless sensor networks (WSNs) utilize high power consumption and therefore the significant efforts have been taken to minimize the usage for lowpower wireless applications. With the advent of the network compression algorithm, loss-less compression wireless solution attracts significant attention due to its property of reducing resources to store and transmit data and perfectly reconstruct the original data from the compressed data in a loss-less environment. To allow network researchers to simulate currently deployed networks, Network Simulator 3 (NS-3) needs to incorporate as many standard networking technologies as possible. One such technology is lossless payload compression in wireless network environments such as WSNs. While compression has been employed in various network environments, unfortunately, there is not yet an implementation for NS-3, a powerful, extensible, and popular simulator used for network research. This paper presents a verification of loss payload compression for the NS-3 environment. We strongly believe that the proposed tool contributes significantly to grow wireless researches and projects by simulating, analyzing, testing, and validating the network behavior. Index Terms—wireless sensor
Nonstandard transitions in the Kuramoto model: A role of asymmetry in natural frequency distributions
Creators: name: Terada, Yu
name: Ito, Keigo
name: Aoyagi, Toshio
name: Yamaguchi, Yoshiyuki Y.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study transitions in the Kuramoto model by shedding light on asymmetry in the natural frequency distribution, which has been assumed to be symmetric in many previous studies. The asymmetry brings two nonstandard bifurcation diagrams, with the aid of bimodality. The first diagram consists of stationary states, and has the standard continuous synchronization transition and a subsequent discontinuous transition as the coupling strength increases. Such a bifurcation diagram has been also reported in a variant model, which breaks the odd symmetry of the coupling function by introducing the phase lag. The second diagram includes the oscillatory state emerging from the partially synchronized state and followed by a discontinuous transition. This diagram is firstly revealed in this study. The two bifurcation diagrams are obtained by employing the Ott-Antonsen ansatz, and are verified by direct $N$-body simulations. We conclude that the asymmetry in distribution, with the bimodality, plays a similar role to the phase lag, and diversifies the transitions.
description: The axes in figures have been fixed
Seq-HGNN: Learning Sequential Node Representation on Heterogeneous Graph
Creators: name: Du, Chenguang
name: Yao, Kaichun
name: Zhu, Hengshu
name: Wang, Deqing
name: Zhuang, Fuzhen
name: Xiong, Hui
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Recent years have witnessed the rapid development of heterogeneous graph neural networks (HGNNs) in information retrieval (IR) applications. Many existing HGNNs design a variety of tailor-made graph convolutions to capture structural and semantic information in heterogeneous graphs. However, existing HGNNs usually represent each node as a single vector in the multi-layer graph convolution calculation, which makes the high-level graph convolution layer fail to distinguish information from different relations and different orders, resulting in the information loss in the message passing. %insufficient mining of information. To this end, we propose a novel heterogeneous graph neural network with sequential node representation, namely Seq-HGNN. To avoid the information loss caused by the single vector node representation, we first design a sequential node representation learning mechanism to represent each node as a sequence of meta-path representations during the node message passing. Then we propose a heterogeneous representation fusion module, empowering Seq-HGNN to identify important meta-paths and aggregate their representations into a compact one. We conduct extensive experiments on four widely used datasets from Heterogeneous Graph Benchmark (HGB) and Open Graph Benchmark (OGB). Experimental results show that our proposed method outperforms state-of-the-art baselines in both accuracy and efficiency. The source code is available at https://github.com/nobrowning/SEQ_HGNN.
description: SIGIR 2023
Hepatoprotective potential of Epiphyllum oxypetalum.pdf
Creators: name: ASDAQ, SYED MOHAMMED BASHEERUDDIN
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 420899
subject: Traditional, complementary and integrative medicine not elsewhere classified

description: Biochemical and histopathological findings indicate that E. oxypetalum leaf extract exhibits hepatoprotective properties, likely due to its free radical scavenging abilities and its capacity to reduce inflammation caused by paracetamol overdose.
Momentum and Energy Dependent Resolution Function of the ARCS Neutron Chopper Spectrometer at High Momentum Transfer: Comparing Simulation and Experimen
Creators: name: Diallo, S. O.
name: Lin, J. Y. Y.
name: Abernathy, D. L.
name: Azuah, R. T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Inelastic neutron scattering at high momentum transfers (i.e. $Q\ge20$ Å) or DINS provides direct observation of the momentum distribution of light atoms, making it a powerful probe for studying single-particle motions in liquids and solids. The quantitative analysis of DINS data requires an accurate knowledge of the instrument resolution function $R_{i}({Q},E)$ at each $Q$ and energy transfer $E$, where the label $i$ indicates whether the resolution was experimentally observed $i={obs}$ or simulated $i=sim$. Here, we describe two independent methods for determining the total resolution function $R_{i}({Q},E)$ of the ARCS neutron instrument at the Spallation Neutron Source, Oak Ridge National Laboratory. The first method uses experimental data from an archetypical system (liquid $^4$He) studied with DINS, which are then numerically deconvoluted using its previously determined intrinsic scattering function to yield $R_{obs}({Q},E)$. The second approach uses accurate Monte Carlo simulations of the ARCS spectrometer, which account for all instrument contributions, coupled to a representative scattering kernel to reproduce the experimentally observed response $S({Q},E)$. Using a delta function as scattering kernel, the simulation yields a resolution function $R_{sim}({Q},E)$ with comparable lineshape and features as $R_{obs}({Q},E)$, but somewhat narrower due to the ideal nature of the model. Using each of these two $R_{i}({Q},E)$ separately, we extract characteristic parameters of liquid $^4$He such as the intrinsic linewidth $α_2$ (which sets the atomic kinetic energy $\langle K\rangle\simα_2$) in the normal liquid and the Bose-Einstein condensate parameter $n_0$ in the superfluid phase. The extracted $α_2$ values agree well with previous measurements, independently of which $R_i(Q,y)$ is used to analyze the data.
Project-Based Learning for Robot Control Theory: A Robot Operating System (ROS) Based Approach
Creators: name: Farzan, Siavash
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Control theory is an important cornerstone of the robotics field and is considered a fundamental subject in an undergraduate and postgraduate robotics curriculum. Furthermore, project-based learning has shown significant benefits in engineering domains, specifically in interdisciplinary fields such as robotics which require hands-on experience to master the discipline adequately. However, designing a project-based learning experience to teach control theory in a hands-on setting can be challenging, due to the rigor of mathematical concepts involved in the subject. Moreover, access to reliable hardware required for a robotics control lab, including the robots, sensors, interfaces, and measurement instruments, may not be feasible in developing countries and even many academic institutions in the US. The current paper presents a set of six project-based assignments for an advanced postgraduate Robot Control course. The assignments leverage the Robot Operating System (ROS), an open-source set of tools, libraries, and software, which is a de facto standard for the development of robotics applications. The use of ROS, along with its physics engine simulation framework, Gazebo, provides a hands-on robotics experience equivalent to working with real hardware. Learning outcomes include: i) theoretical analysis of linear and nonlinear dynamical systems, ii) formulation and implementation of advanced model-based robot control algorithms using classical and modern control theory, and iii) programming and performance evaluation of robotic systems on physics engine robot simulators. Course evaluations and student surveys demonstrate that the proposed project-based assignments successfully bridge the gap between theory and practice, and facilitate learning of control theory concepts and state-of-the-art robotics techniques through a hands-on approach.
description: 24 pages, 15 figures, accepted for publication in the 2023 ASEE Annual Conference Proceedings, American Society for Engineering Education