cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A macroscale evaluation of forest management in the boreal forest of Canada : linking data and models
Creators: name: Lochhead, Kyle Douglas
Publisher: name: University of British Columbia
Year: 2019

description: Climate change is altering the nature and condition of vast areas in the boreal forest of Canada. Vulnerabilities associated with drought, fire and forest health are being observed across thousands of kilometres or macroscales. There are great uncertainties in the ecological responses across this macroscale, along with uncertainties in policy and economic responses that need to translate effectively between local and macroscale decision makers. Addressing these uncertainties requires coherent economic and policy analyses that are consistent over different spatio-temporal scales. To meet the challenges, multi-source data must be linked to provide forest information at higher spatial scales, and systems linking ecological and economic information are also needed. Given this informational need, my research question was: How can we improve the linkages of multi-source ecological and economic data to evaluate forest management decisions at macroscales? First, to improve the ecological information, I evaluated alternative multivariate methods to spatially link multi-source data and models of forest attributes for macroscale analysis. The goal was to obtain logical consistency across variables of interest, while improving accuracy and computational simplicity to the analysis. Second, to improve the economic information fed into the analysis, I used price data to develop a multivariate method for generating price information at a finer temporal scale which remains consistent with longer-term price scenarios from global land use models. Third, and finally, I developed a macroscale decision support system (quantify, query and queue, Q3) that demonstrates how to link spatial and temporal ecological and economic information to a forest land-base which is subject to climate change vulnerabilities, the western boreal forest of Canada. As an illustration of the usefulness and relevance of the Q3, I assessed the ability of mitigating drought impacts resulting from possible future climates via planting improved seedling stocks developed in tree genetics and improvement programs. Overall, the methods and the newly developed macroscale decision support system I developed link ecological (e.g., climate change impacts on forests) and economic (e.g., price change) uncertainties enabling the development of appropriate forest and environmental policies, along with forest management practices needed to implement these policies.
Log-Convexity of Rate Region in 802.11e WLANs
Creators: name: Leith, Douglas J.
name: Subramanian, Vijay G.
name: Duffy, Ken R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: In this paper we establish the log-convexity of the rate region in 802.11 WLANs. This generalises previous results for Aloha networks and has immediate implications for optimisation based approaches to the analysis and design of 802.11 wireless networks.
title: RISK FACTORS OF BREAST TUMOR AND OVARIAN TUMOR IN ADOLESCENT GIRLS
Creators: name: Gumenyuk, Ol'ga I.
name: Maksikova, Alina N.
name: Mishanina, Dar'ya A.
name: Protopopova, Nadezhda A.
name: Chernenkov, Yuriy V.
name: Mustafin, Robert D.
name: Kutukov, Vladimir V.
name: Ledyaev, Mikhail Ya.
Publisher: name: Astrakhan State Medical University
Year: 2021

description: Information from the scientific literature on risk factors for ovarian and breast tumours in adolescent girls is summarized. The main risk factors for ovarian tumours include exposure to teratogens and hormonal disorders, and mammary glands include gynecological and endocrine diseases, a hereditary predisposition. In addition, the likelihood of the formation of reproductive tumours in adolescent girls is determined by their lifestyle and environmental conditions. Keywords: adolescent girls, reproductive system, ovarian tumours, breast tumours.
Direct detection of a substellar companion to the young nearby star PZ Telescopii
Creators: name: Mugrauer, M.
name: Vogt, N.
name: Neuhäuser, R.
name: Schmidt, T. O. B.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Aims: We study the formation of substellar objects (exoplanets and brown dwarfs) as companions to young nearby stars. Methods: With high contrast AO imaging obtained with NACO at ESO's VLT we search for faint companion-candidates around our targets, whose companionship can be confirmed with astrometry. Results: In the course of our imaging campaign we found a faint substellar companion of the nearby pre-main sequence star PZ Tel, a member of the beta Pic moving group. The companion is 5-6 mag fainter than its host star in JHK and is located at a separation of only 0.3 arcsec (or 15 AU of projected separation) north-east of PZ Tel. Within three NACO observing epochs we could confirm common proper motion (>39 sigma) and detected orbital motion of PZ Tel B around its primary (>37 sigma). The photometry of the newly found companion is consistent with a brown dwarf with a mass of 24 to 40 MJup, at the distance (50 pc) and age (8-20 Myr) of PZ Tel. The effective temperature of the companion, derived from its photometry, ranges between 2500 and 2700 K, which corresponds to a spectral type between M6 and M8. After beta Pic b, PZ Tel B is the second closest substellar companion imaged directly around a young star.
description: accepted for publication in A&A Letters
Observation of novel interference patterns in Bi2-xFexTe3+d by Fourier transform scanning tunneling spectroscopy
Creators: name: Okada, Y.
name: Dhital, C.
name: Zhou, Wen-Wen
name: Lin, Hsin
name: Basak, S.
name: Bansil, A.
name: Huang, Y. -B.
name: Ding, H.
name: Wang, Z.
name: Wilson, Stephen D.
name: Madhavan, V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In topological insulators (TI), strong spin-orbit coupling results in non-trivial scattering processes of the surface states, whose effects include suppressed back scattering1, 2, 3, 4 weak anti-localization5, 6 and the possibility of an exotic Kondo effect that mimics graphene7. Introducing time reversal breaking perturbations and establishing long-range magnetic order has been theorized to lead to the formation of quantized magnetoelectric phenomena8, fractionalized charge excitations, and the appearance of quantum wire states9. A key, elusive, step in exploring these and other novel electronic phases is the experimental observation of charge backscattering due to spin-flip processes at the surface of a magnetically-doped TI. Here we utilize Fourier transform scanning tunneling spectroscopy (FT-STS) to probe the surface of a magnetically doped TI, Bi2-xFexTe3+d. Our measurements show the appearance of a hitherto unobserved channel of electronic backscattering along surface q-vector Γκ. By combining FT-STS with angle-resolved photoemission data, we identify the momentum space origins of the observed q-vectors, which on comparison to a model calculation are enhanced by spin-flip scattering. Our findings present compelling evidence for the first spatial and momentum resolved measurements of magnetic impurity induced backscattering in a prototypical TI.
A note on the abelian sandpile in Z^d
Creators: name: Tyomkyn, Mykhaylo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Combinatorics (math.CO)
subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We analyse the abelian sandpile model on $\mathbbm{Z}^d$ for the starting configuration of $n$ particles in the origin and $2d-2$ particles otherwise. We give a new short proof of the theorem of Fey, Levine and Peres \cite{FLP} that the radius of the toppled cluster of this configuration is $O(n^{1/d})$.
title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ D-ÑÑÐ¸Ð³Ð³ÐµÑÐ¾Ð², Ð¸Ð·Ð³Ð¾ÑÐ°Ð²Ð»Ð¸Ð²Ð°ÐµÐ¼ÑÑ Ð¿Ð¾ ÐÐÐÐ ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸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: Investigation of D-triggers manufactured by CMOS technology
Creators: name: ÐÑÑÐ±Ð°Ð½Ð¾Ð², ÐÐ¸Ð´Ð°ÑÑ
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: ÑÑÐ¸Ð³Ð³ÐµÑÑ
ÐÐÐÐ ÑÐµÑ Ð½Ð¾Ð»Ð¾Ð³Ð¸Ñ
D-ÑÑÐ¸Ð³Ð³ÐµÑÑ
triggers
CMOS technology
D-triggers

description: Ð Ð°Ð±Ð¾ÑÐ° ÑÐ¾Ð´ÐµÑÐ¶Ð¸Ñ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ðµ ÑÑÐ¸Ð³Ð³ÐµÑÐ¾Ð², ÑÐ°ÑÑÐ¼Ð°ÑÑÐ¸Ð²Ð°ÐµÑÑÑ Ð¿ÑÐ¸Ð½ÑÐ¸Ð¿ ÑÐ°Ð±Ð¾ÑÑ, Ð¸Ñ ÑÐ¸Ð¿Ñ Ð¸ ÑÐ²ÐµÐ´ÐµÐ½Ð¸Ñ Ð¾ ÐÐÐÐ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ð¸. ÐÐ°Ð»ÐµÐµ Ð¾Ð¿Ð¸ÑÑÐ²Ð°ÐµÑÑÑ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸ÑÐµÑÐºÐ¸Ð¹ Ð¼Ð°ÑÑÑÑÑ D-ÑÑÐ¸Ð³Ð³ÐµÑÐ° Ð¿Ð¾ ÐÐÐÐ ÑÐµÑÐ½Ð¾Ð»Ð¾Ð³Ð¸Ð¸. ÐÑÐ¸Ð²Ð¾Ð´Ð¸ÑÑÑ Ð¼ÐµÑÐ¾Ð´Ð¸ÐºÐ° Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð¸Ñ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸Ðº. ÐÐ¿Ð¸ÑÑÐ²Ð°ÐµÑÑÑ ÑÐµÐ°Ð»Ð¸Ð·Ð°ÑÐ¸Ñ D-ÑÑÐ¸Ð³Ð³ÐµÑÐ¾Ð² Ð¸ ÑÑÑÑÐ¾Ð¹ÑÑÐ² Ð½Ð° Ð¸Ñ Ð¾ÑÐ½Ð¾Ð²Ðµ Ð¸ Ð¿ÑÐ¸Ð½ÑÐ¸Ð¿Ñ ÑÐ°Ð±Ð¾ÑÑ. Ð Ð°Ð·ÑÐ°Ð±Ð¾ÑÐ°Ð½Ñ ÑÐ¾Ð¿Ð¾Ð»Ð¾Ð³Ð¸Ð¸ D-ÑÑÐ¸Ð³Ð³ÐµÑÐ¾Ð² Ð¸ ÑÑÑÑÐ¾Ð¹ÑÑÐ² Ð½Ð° Ð¸Ñ Ð¾ÑÐ½Ð¾Ð²Ðµ. ÐÐ°Ð»ÐµÐµ Ð¿ÑÐ¸Ð²Ð¾Ð´ÑÑÑÑ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ D-ÑÑÐ¸Ð³Ð³ÐµÑÐ¾Ð² Ð¸ ÑÑÑÑÐ¾Ð¹ÑÑÐ² Ð½Ð° Ð¸Ñ Ð¾ÑÐ½Ð¾Ð²Ðµ.
description: The work contains the definition of triggers, considers the principle of work, their types and information about CMOS technology. The following describes the D-trigger technology route using CMOS technology. A technique for measuring characteristics is given. It describes the implementation of D-triggers and devices based on them and principles of operation. Developed topology of D-triggers and devices based on them. The following are simulations of D-triggers and devices based on them.
Self-Protection of Massive Cosmological Gravitons
Creators: name: Berkhahn, Felix
name: Dietrich, Dennis D.
name: Hofmann, Stefan
Publisher: name: arXiv
Year: 2010
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: FOS: Physical sciences

description: Relevant deformations of gravity present an exciting window of opportunity to probe the rigidity of gravity on cosmological scales. For a single-graviton theory, the leading relevant deformation constitutes a graviton mass term. In this paper, we investigate the classical and quantum stability of massive cosmological gravitons on generic Friedman backgrounds. For a Universe expanding towards a de Sitter epoch, we find that massive cosmological gravitons are self-protected against unitarity violations by a strong coupling phenomenon.
description: 1+11 pages, v2: references added
Potensi Mikrobiologi Untuk Kalimantan Timur di Era SDGs
Creators: name: Turista, Dora Dayu Rahma
Publisher: name: Zenodo
Year: 2021
Subjects: Mikrobiologi, SDGs, Kalimantan Timur

description: Materi ini memaparkan beberapa contoh kajian pada beberapa bidang mikrobiologi terapan yang diharapkan dapat menstimulasi kajian terkait potensi mikrobiologi di Kalimantan Timur guna mendukung tercapainya tujuan SDGs.
description: Disampaikan pada acara Agenda Diskusi Ilmiah dengan tema "Mengulik Potensi Bidang Mikrobiologi untuk Kaltim di Era SDGs" yang diselenggarakan oleh HIMAPBIO FKIP Universitas Mulawarman Kabinet Wirawidya 2021, secara online melalui Zoom, pada Minggu, 03 Oktober 2021.
title: Single centre analysis of revascularization strategy in Newfoundland and Labrador multivessel disease patients
Creators: name: Vasanthan, Kieran
Publisher: name: Memorial University of Newfoundland
Year: 2020

description: Background: Coronary artery disease (CAD) can be managed with Percutaneous Coronary Intervention (PCI) or Coronary Artery Bypass Grafting (CABG). Management of subtypes of CAD, including Multivessel Disease (MVD) and isolated Left Main Coronary Artery (LMCA) disease, continue to evolve in the literature. An observational registry may provide implications for management of CAD. Methods: All isolated LMCA and triple-vessel disease patients who received either PCI or CABG in Newfoundland & Labrador (NL) were analyzed in two separate studies. The first study evaluated isolated LMCA patients for freedom from Major Adverse Cardiac Events (MACE). The second study evaluated triple vessel disease patients for in-hospital mortality post revascularization. Results: Firstly, 115 patients with isolated LMCA disease (n=7 PCI, n=99 CABG, n=9 medical management) were identified from May 2006 to October 2015. The rate of MACE at 1 year was 5.1% in the CABG cohort. Secondly, a total of 1604 triple vessel disease patients (n=45 PCI, n=1559 CABG) were analyzed with a median follow up of 5.4 years. The in-hospital mortality rate was 2.2% and 1.2% in the PCI and CABG cohorts, respectively (p=0.533). Conclusion: CABG represented the most common revascularization strategy for both study populations. Freedom from MACE at one year in the CABG isolated LMCA patients was comparable to the literature. Early survival rates were comparable in low-risk triple vessel disease patients revascularized with either therapy and further evaluation is warranted to account for an increasing number of this population being revascularized via PCI.
Moduli Space and Wall-Crossing Formulae in Higher-Rank Gauge Theories
Creators: name: Chen, Heng-Yu
name: Dorey, Nick
name: Petunin, Kirill
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the interplay between wall-crossing in four-dimensional gauge theory and instanton contributions to the moduli space metric of the same theory on $\mathbb{R}^{3}\times S^{1}$. We consider $\mathcal{N}=2$ SUSY Yang--Mills with gauge group SU(n) and focus on walls of marginal stability which extend to weak coupling. By comparison with explicit field theory results we verify the Kontsevich--Soibelman formula for the change in the BPS spectrum at these walls and check the smoothness of the metric in the corresponding compactified theory. We also verify in detail the predictions for the one instanton contribution to the metric coming from the non-linear integral equations of Gaiotto, Moore and Nietzke.
description: 26 pages, no figures
International Investment Law as Development: The Ideological Constraint of the Grand Bargain
Creators: name: Fyock, Claiton
Publisher: name: University of Leicester
Year: 2023
Subjects: Uncategorized

description: This thesis analyses the constraining influence the ‘Grand Bargain’ has on developing states’ engagement with the regime of International Investment Law (IIL). The grand bargain is a narrative presumed by many actors in the regime that posits that, if developing states commit to the norms and operations of IIL, they will enjoy the developmental benefits of further foreign direct investment within their borders. I argue that this narrative constrains developing states’ engagement with IIL and the global political economy more broadly by entrenching both the practices and conceptual framework of globalised capitalism. By entrenching the practices and conceptual framework of globalised capitalism, IIL facilitates and reproduces the exploitation and inequality evident between the transnational capitalist class and developing states. I analyse the grand bargain’s impact on three of IIL’s core concepts and their corresponding areas of practice using a methodology of ideology critique I label the ideological process: development and the definition of investment in arbitration, sovereignty and the jurisprudence of indirect expropriation, and consent and the umbrella clause’s elevation of contractual breaches to the level of treaty.
A Method for Measuring the Bias of High-Redshift Galaxies from Cosmic Variance
Creators: name: Robertson, Brant E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: As deeper observations discover increasingly distant galaxies, characterizing the properties of high-redshift galaxy populations will become increasingly challenging and paramount. We present a method for measuring the clustering bias of high-redshift galaxies from the field-to-field scatter in their number densities induced by cosmic variance. Multiple widely-separated fields are observed to provide a large number of statistically-independent samples of the high-redshift galaxy population. The expected Poisson uncertainty is removed from the measured dispersion in the distribution of galaxy number counts observed across these many fields, leaving, on average, only the contribution to the scatter expected from cosmic variance. With knowledge of the Lambda Cold Dark Matter power spectrum, the galaxy bias is then calculated from the measured cosmic variance. The results of cosmological N-body simulations can then be used to estimate the halo mass associated with the measured bias. We use Monte Carlo simulations to demonstrate that Hubble Space Telescope pure parallel programs will be able to determine galaxy bias at z>~6 using this method, complementing future measurements from correlation functions.
description: Accepted by ApJ Letters
TECHNICAL EFFICIENCY AND TECHNOLOGICAL GAP RATIOS OF TOMATO PRODUCTION IN NORTHERN NIGERIA: A STOCHASTIC META FRONTIER APPROACH
Creators: name: Obianefo Chukwujekwu Aloysius
name: Uchemba Uzochukwu Victor
name: Ezeano Ike Caleb
name: Anumudu Oluchi Odinaka
name: Obianefo Chukwujekwu Aloysius
name: Uchemba Uzochukwu Victor
name: Ezeano Ike Caleb
name: Anumudu Oluchi Odinaka
Publisher: name: Unknown
Year: 2021
Subjects: subject: Production Economics
subject: Analytical model
subject: hypothetical assumptions
subject: efficiency
subject: meta-frontier
subject: tomato
subject: Nigeria

description: The study on technical efficiency and technological gap ratios of tomato production in Northern Nigeria used a stochastic meta-frontier approach to compare the technical efficiency (TE) and technological gap ratios (TGRs) of farmers after establishing the existence of heterogeneous technology adoption among farmers. Data were collected from a cross-section of 359 randomly selected farmers. A trans-log production function model proved more appropriate through a likelihood ratio test, therefore, stochastic frontier analysis and meta-frontier analysis approach were used. The study revealed that Plateau farmers are more technically efficient than Kano and Taraba counterparts respectively. Furthermore, the mean TGR associated with Taraba farmers is tangential to the meta-frontier output, this implies that Taraba farmers adopted the most advanced technology in the industry, while Plateau and Kano farmers need to close up 0.5% and 1.2% gap respectively in order to produce at the optimal output. By policy implication, Plateau and Kano farmers need to be educated on the need to adopt the best agricultural technology to increase their production. This calls for intensification of extension effort in Plateau and Kano state.
Examining the markers of vitamin C cytotoxicity in pancreatic ductal adenocarcinoma
Creators: name: Warren, Cassia Scarlett
Publisher: name: University of British Columbia
Year: 2019

description: Pancreatic ductal adenocarcinoma (PDAC) remains one of the most lethal forms of cancer, with a 5-year survival rate of less than 10%. Current challenges include limited therapeutic options and lack of biomarkers that predict treatment response. Therefore, I sought to determine if a recently rediscovered treatment, pharmacological vitamin C, has clinical utility in PDAC. I determined that PDAC cell lines have differential sensitivity at doses tested. Previous research in colorectal cancer indicated that KRAS mutations infer vitamin C sensitivity, which was a trend in my results. Therefore, I created two isogenic cell line models expressing either KRAS G12D or KRAS G12V. Testing depicted increased sensitivity in one model but none others, suggesting that factors beyond oncogenic KRAS alone may be needed to increase sensitivity to vitamin C treatment. Oncogenic KRAS is known to increase glycolysis through the Warburg effect. Interestingly, pharmacological vitamin C treatment is also hypothesized to affect this pathway. Therefore, I sought to determine the relationship between vitamin C and glycolysis to determine potential markers of vitamin C sensitivity. Testing glycolysis rates demonstrated that vitamin C inhibits glycolysis independent from vitamin C toxicity. Work by Daemen et al. identified that glycolytic inhibitors cause toxicity selective to glycolytic dependant cells, whereas lipogenic cells survive. Furthermore, they characterized our two vitamin C sensitive cell lines as glycolytic. To further understand if glycolytic dependence influences vitamin C sensitivity, I used glucose withdrawal to reduce the cell’s glycolytic dependence. In low glucose conditions, higher doses of vitamin C were needed compared to high glucose conditions, suggesting that glycolytic dependence does influence toxicity to vitamin C. Together, my results suggest that glycolytic dependence may be a good marker for determining vitamin C sensitivity. To test if vitamin C is toxic in KRAS mutated patient-derived models, PDAC-derived organoids were created and treated using vitamin C monotherapy and combination therapy with gemcitabine. Vitamin C showed toxicity as a monotherapy and increased toxicity when combined with gemcitabine. This is the first known use of organoids in testing vitamin C treatment and suggests, congruent with other research, that vitamin C alone and in combination has clinical utility.
Lepton number violation in theories with a large number of Standard Model copies
Creators: name: Kovalenko, Sergey
name: Päs, Heinrich
name: Schmidt, Ivan
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We examine lepton number violation (LNV) in theories with a saturated black hole bound on a large number of species. Such theories have been advocated recently as a possible solution to the hierarchy problem and an explanation of the smallness of neutrino masses. The violation of lepton number can be a potential phenomenological problem of this N-copy extension of the Standard Model as due to the low quantum gravity scale black holes may induce TeV scale LNV operators generating unacceptably large rates of LNV processes. We show, however, that this does not happen in this scenario due to a specific compensation mechanism between contributions of different Majorana neutrino states to these processes. As a result rates of LNV processes are extremely small and far beyond experimental reach, at least for the left-handed neutrino states.
description: 5 pages, 3 figures
Images of a fourth planet orbiting HR 8799
Creators: name: Marois, C.
name: Zuckerman, B.
name: Konopacky, Q. M.
name: Macintosh, B.
name: Barman, T.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: High-contrast near-infrared imaging of the nearby star HR 8799 has shown three giant planets. Such images were possible due to the wide orbits (> 25 AU) and youth (< 100 Myr) of the imaged planets, which are still hot and bright as they radiate away gravitational energy acquired during their formation. A major area of contention in the extrasolar planet community is whether outer planets (> 10 AU) more massive than Jupiter form via one-step gravitational instabilities or, rather, via a two-step process involving accretion of a core followed by accumulation of a massive outer envelope composed primarily of hydrogen and helium. Here we report the presence of a fourth planet, interior to and about the same mass as the other three. The system, with this additional planet, represents a challenge for current planet formation models as none of them can explain the in situ formation of all four planets. With its four young giant planets and known cold/warm debris belts, the HR 8799 planetary system is a unique laboratory to study the formation and evolution of giant planets at wide > 10 AU separations.
description: 20 pages, 4 figures, in press, Nature
The Fate of R-Parity
Creators: name: Perez, Pavel Fileviez
name: Spinner, Sogee
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The possible origin of the R-parity violating interactions in the minimal supersymmetric standard model and its connection to the radiative symmetry breaking mechanism (RSBM) is investigated. In the context of the simplest model where the implementation of the RSBM is possible, we find that in the majority of the parameter space R-parity is spontaneously broken at the low-scale. These results hint at the possibility that R-parity violating processes will be observed at the Large Hadron Collider, if Supersymmetry is realized in nature.
Muonic hydrogen and MeV forces
Creators: name: Tucker-Smith, David
name: Yavin, Itay
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We explore the possibility that a new interaction between muons and protons is responsible for the discrepancy between the CODATA value of the proton radius and the value deduced from the measurement of the Lamb shift in muonic hydrogen. We show that a new force carrier with roughly MeV mass can account for the observed energy shift as well as the discrepancy in the muon anomalous magnetic moment. However, measurements in other systems constrain the couplings to electrons and neutrons to be suppressed relative to the couplings to muons and protons, which seems challenging from a theoretical point of view. One can nevertheless make predictions for energy shifts in muonic deuterium, muonic helium, and true muonium under the assumption that the new particle couples dominantly to muons and protons.
description: 4 pages, 3 figures
A panchromatic view of PKS 0558-504: an ideal laboratory to study the disk-jet link
Creators: name: Gliozzi, M.
name: Papadakis, I. E.
name: Grupe, D.
name: Brinkmann, W. P.
name: Raeth, C.
name: Kedziora-Chudczer, L.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: PKS 0558-504 is the brightest radio-loud Narrow-Line Seyfert 1 galaxy at X-ray energies. Here we present results from the radio, optical, UV, and X-ray bands obtained with Swift, XMM, and ATCA during a 10-day monitoring campaign in September 2008. The simultaneous coverage at several wavelengths makes it possible to investigate in detail the broadband spectral energy distribution (SED) and the energetic of this source. The main results can be summarized as follows. The ATCA reveals the presence of an extended radio emission in PKS 0558-504 with two lobe-like structures at ~7" from the bright central source. The extended radio structure and the low value of the radio-loudness similar to radio-quiet Seyfert galaxies coupled with constraints from higher energy bands argue against a jet-dominated emission. The study of the SED, which is dominated by a nearly constant optical-UV emission, supports the conclusion that PKS 0558-504 is accreting at super-Eddington rate. This conclusion was reached assuming M_BH=2.5e8 M_sun, which was obtained with a new scaling method based on X-ray spectral variability results. A comparison between the accretion luminosity and the kinetic power associated with the jet suggests that in this source the accretion power dominates in agreement with the results obtained from Radiation-MHD simulations of Galactic black holes (GBHs) accreting at the Eddington rate. The combined findings from this panchromatic investigation strongly suggest that PKS 0558-504 is a large-scale analog of GBHs in their highly accreting intermediate state. Importantly, PKS 0558-504 may also be the prototype of the parent population of the very radio-loud NLS1s recently detected at gamma-ray energies.
description: 11 pages, 5 figures, 3 tables, accepted for publication in ApJ
Three-dimensional Two-Layer Outer Gap Model: Fermi Energy Dependent Light Curves of the Vela Pulsar
Creators: name: Wang, Y.
name: Takata, J.
name: Cheng, K. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We extend the two-dimensional two-layer outer gap model to a three-dimensional geometry and use it to study the high-energy emission of the Vela pulsar. In this model, the outer gap is divided into two parts, i.e. the main acceleration region on the top of last-open field lines and the screening region around the upper boundary of the gap. In the main acceleration region, the charge density is much lower than the Goldreich-Julian charge density and the charged particles are accelerated by the electric field along the magnetic field to emit multi-GeV photons. In the screening region, the charge density is larger than the Goldreich-Julian value to close the gap and particles in this region are responsible for multi-100MeV photon emission. We apply this three dimensional two-layer model to the Vela pulsar and compare the model light curves, the phase-averaged spectrum and the phase-resolved spectra with the recent Fermi observations, which also reveals the existence of the third peak between two main peaks. The phase position of the third peak moves with the photon energy, which cannot be explained by the geometry of magnetic field structure and the caustic effects of the photon propagation. We suggest that the existence of the third peak and its energy dependent movement results from the azimuthal structure of the outer gap.
description: 11 pages, 15 figures, accepted for publication in MNRAS
Music and Games: Future Rhythmic Simulation, Implementations and Considerations
Creators: name: Aishwarya Jadeja
name: Soni, Pooja
name: Georrge John J
Publisher: name: figshare
Year: 2020
Subjects: subject: 80602 Computer-Human Interaction
subject: FOS: Psychology

description: ABSTRACT: Rhythmic abilities are highly widespread in the general population. The majority can extract the regular beat of the music and align their movements with it. These abilities are eloquent from a cognitive function such as language and memory. When rhythmic skills are challenged by brain damage or neurodevelopmental disorders, remediation strategies based on rhythm can be considered. For example, rhythmic training can be used to enhance motor performance and cognitive and language skills. For rhythmic training, games are also considered as a dynamic factor, and numerous are readily available in the market. Games that train rhythm skills may serve as useful tools for retraining motor and cognitive function in patients with motor or neurodevelopment disorders (e.g., Parkinson’s disease, dyslexia, ADHD). Additionally, regular rhythmic patterns facilitate memory encoding and decoding of non-musical information; hence music is an efficient mnemonic tool. The music as a hierarchical, compound language of the time, with its unique ability to access affective/motivational systems in the brain, provides time structures enhancing perception processes, mainly in the range of cognition, language, and motor learning. It allows for emotional expression and improvement of the motivation for rehabilitation activities. The new technologies of rhythmic sensory stimulation (i.e., Binaural Beat Stimulation) or rhythmic music in combination with rhythmic light therapy appear. These multimodal forms of stimulation are used to treat stroke, brain injury, dementia, and other cognitive deficits.
Model Predictive Control for real-time operation of a stormwater drainage system
Creators: name: Kumar, Akhil
Publisher: name: University of British Columbia
Year: 2020

description: Stormwater drainage system operators in lowland areas use weather forecast information, tide tables, a hydraulic model and heuristic experiences to balance the water table in the region close to the desired water level setpoints. Water can be discharged using pumps and gravity outflow flap gates, or can be stored in the system if the discharge capacity is limited. In the lower mainland of British Columbia (BC), climate change projections are showing an increasing trend in high-intensity, short-duration rainfall events, and sea level is expected to rise up to 1.0 m by the end of 2100. Given the uncertainties in climate change projections, the challenge is to build more resilient stormwater drainage system whilst reducing the cost of pumping operation or other capacity expansions. Experiences in the Netherlands have shown that algorithmic control of drainage system using model predictive control (MPC) can be a way to link water and energy objectives more cohesively. To maintain water level at the desired water level setpoint, MPC calculates water levels that need to be controlled using rainfall and sea tides forecasts, and computes optimal control actions for pump stations. This thesis aims to gain operational insights into algorithmic control of urban stormwater drainage system in Richmond BC, using a simplified drainage system model. Smart control strategies serving different objectives are explored to reduce pump energy costs while avoiding flood. Furthermore, an application of bottom-up vulnerability assessment under different control strategies aiming to maximize the operational flexibilities, illuminates the vulnerabilities and adaptation capacity of the (modeled) existing stormwater drainage system to plausible scenarios of climate change induced sea level rise, heavy rainstorms, and land-use changes. This provides necessary information to water systems operators and engineers about the smart, real-time control of such a system, and finding ways to combine engineering designs with operational flexibilities for better adapting to future conditions.
An Exponential Smoothing Holt-Winters Based-Approach for Estimating Extreme Values of Covid-19 Cases
Creators: name: Abi Rafdhi Hernandy
name: Rohmawati, Aniq Atiqi
name: Gunawan, Putu Harry
Publisher: name: Indonesia Journal on Computing (Indo-JC)
Year: 2021

description: Covid-19 is an ongoing outbreak across the world infecting millions, having significant fatality rate, and triggering economic disruption on a large scale. The demand of healthcare facility has been significantly affected by the increased Covid-19 cases. Many countries have been forced to do lockdown and physical distancing to avoid a crucial peak of novel Covid-19 pandemic that potentially overwhelms healthcare services. Central Java is the province with the third highest population density in Indonesia and predicted to be affected significantly over a particular period of this outbreak. Our paper aims to provide a modelling to estimate extreme values of daily Covid-19 cases in Central Java, between March and April 2021. We particularly capture seasonality during this period using Exponential Smoothing Holt-Winters. We employ that Value at Risk and mean excess function based-approaches for extreme value estimation. Our simulation studies indicate that Exponential Smoothing Holt-Winters and Value at Risk provide sharp and well prediction for extreme value with zero violation. Since a number of positive cases has resulted unprecedented volatility, estimating the extreme value of daily Covid-19 cases become a crucial matter to support maintain essential health services.
description: Indonesia Journal on Computing (Indo-JC), Vol. 6 No. 2 (2021): September, 2021
Germanisches Blei für Rom
Creators: name: Hanel, Norbert
name: Rothenhöfer, Peter
name: Genovesi, Stefano
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2023

description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 83 Nr. 1 (2005)
Multi Criteria Recommender System for Music using K-Nearest Neighbors and Weighted Product Method
Creators: name: Nofal, Muhamad Hafidh
name: Baizal, Zk Abdurahman
name: Dharayani, Ramanti
Publisher: name: Indonesia Journal on Computing (Indo-JC)
Year: 2021

description: Currently, the music industry has grown rapidly which has led to an information overload that hinders users from finding the music they want, because everyone has their own unique characteristics. In a previous study, the Recommender System converted music lyrics into digital values using Lexicon's Non-Commercial Research (NRC) and K Nearest Neighbors (KNN) to look for similarities between music. However, this system only uses lyrics to recommend music, so it doesn't pay more attention to user preferences. Therefore, in this study adds criteria from users using the Weighted Product Method (WPM) to weight the music criteria with the input criteria from users. In this study uses a music dataset from 2000 to 2019 taken from the Kaggle website. The purpose of this study was to measure user satisfaction using the System Usability Scale (SUS). In this case, the user is free to answer 10 questions regarding the results of the recommendations provided by the system. Based on the results of the questionnaire, the SUS score was 83.65. This score is included in the EXCELLENT category with grade A scale
description: Indonesia Journal on Computing (Indo-JC), Vol. 6 No. 2 (2021): September, 2021
A Droplet within the Spherical Model
Creators: name: Patrick, Anatoly E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Various substances in the liquid state tend to form droplets. In this paper the shape of such droplets is investigated within the spherical model of a lattice gas. We show that in this case the droplet boundary is always diffusive, as opposed to sharp, and find the corresponding density profiles (droplet shapes). Translation-invariant versions of the spherical model do not fix the spatial location of the droplet, hence lead to mixed phases. To obtain pure macroscopic states (which describe localized droplets) we use generalized quasi-averaging. Conventional quasi-averaging deforms droplets and, hence, can not be used for this purpose. On the contrary, application of the generalized method of quasi-averages yields droplet shapes which do not depend on the magnitude of the applied external field.
description: 22 pages, 2 figures
Harmonic analysis on Heisenberg--Clifford Lie supergroups
Creators: name: Alldridge, Alexander
name: Hilgert, Joachim
name: Laubinger, Martin
Publisher: name: arXiv
Year: 2011
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B30, 58C50

description: We define a Fourier transform and a convolution product for functions and distributions on Heisenberg--Clifford Lie supergroups. The Fourier transform exchanges the convolution and a pointwise product, and is an intertwining operator for the left regular representation. We generalize various classical theorems, including the Paley--Wiener--Schwartz theorem, and define a convolution Banach algebra.
description: 28 pages
Forecasting Number of New Cases Daily COVID-19 in Central Java Province Using Exponential Smoothing Holt-Winters
Creators: name: Irandi, Dinda Fitri
name: Rohmawati, Aniq Atiqi
name: Gunawan, Putu Harry
Publisher: name: Indonesia Journal on Computing (Indo-JC)
Year: 2021

description: There is hard to mention how long the COVID-19 pandemic will discontinue. There are some factors, including the public’s efforts to slow spread and researchers’ work to observe more about this outbreak. From the beginning of the health crisis, particularly following the announcement of the first positive case In Indonesia due to the COVID-19 on March 2, 2020. Afterwards, the number of daily cases increase simultaneously in other regions in Indonesia until today. Due to the fact that the significant mobility of the people, Central Java has contributed the 3rd rank of potential number of COVID-19 positive cases in Indonesia. This study aims to forecast the number of COVID-19 daily new cases in Central Java to assist the government in preparing the necessary resources and controlling the spread of the COVID-19 virus in Central Java Province. We proposed Exponential Smoothing Holt-Winters with the Additive model with seasonal addition considering trend and seasonal factors. The dataset during March 14 to April 17, 2021, revealed fluctuation of trend and seasonal patterns. Our simulation studies indicate that Exponential Smoothing Holt-Winters provides sharp and well performance for forecasting daily new cases of COVID-19 in Central Java province with MAPE less than 10%.
description: Indonesia Journal on Computing (Indo-JC), Vol. 6 No. 2 (2021): September, 2021
Two-electron excitation of an interacting cold Rydberg gas
Creators: name: Millen, J.
name: Lochead, G.
name: Jones, M. P. A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report the creation of an interacting cold Rydberg gas of strontium atoms. We show that the excitation spectrum of the inner valence electron is sensitive to the interactions in the Rydberg gas, even though they are mediated by the outer Rydberg electron. By studying the evolution of this spectrum we observe density-dependent population transfer to a state of higher angular momentum l. We determine the fraction of Rydberg atoms transferred, and identify the dominant transfer mechanism to be l-changing electron-Rydberg collisions associated with the formation of a cold plasma.
description: 5 pages, 5 figures
Information Technology Governance Audit Using the COBIT 5 Framework (Case Study of PDAM Tirta Patriot Kota Bekasi)
Creators: name: Lisda Awalia Aprilianti
name: Darwiyanto, Eko
name: Arie, Yanuar Firdaus
Publisher: name: Indonesia Journal on Computing (Indo-JC)
Year: 2021

description: PDAM Tirta Patriot has implemented information systems for its business process but still has deficiencies, including some business processes that do not have documented guidelines and procedures. Furthermore, the human resources in PDAM Tirta Patriot are insufficient for improving IT governance due to the lack of reliable personnel in the IT unit. Given the importance of IT for PDAM, an audit is needed to evaluate the capability of the IT unit in managing IT. COBIT 5 provides a goals cascade to align the company with its business goals. However, the goals cascade does not provide priority to IT-related goals. Therefore, for prioritizing IT-related goals, this research uses Analytical Hierarchy Process (AHP). From the AHP result, the selected domains are APO01, MEA01, and APO07. This research aims to determine the current capability level and analyze the gap between it and the chosen target capability level, precisely level 2. The current capability level of PDAM Tirta Patriot from domain APO01 is 1, MEA01 is 0, and APO07 is 0, which means none of those have reached the target capability level. Recommendations are given based on the unfulfilled work product for domains that do not reach the target capability level.
description: Indonesia Journal on Computing (Indo-JC), Vol. 6 No. 2 (2021): September, 2021
Broaenanthus pubescens Bullock
Creators: name: Klak, Cornelia
name: Hedderson, Terry A.
name: Linder, H. Peter
Publisher: name: Zenodo
Year: 2003
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Aizoaceae
Broaenanthus
Broaenanthus pubescens

description: Broaenanthus pubescens (N.E.Br. ex Maas) Bullock (Klak 242; trnL -F AJ438998, ITS AJ438210)
description: Published as part of Klak, Cornelia, Hedderson, Terry A. & Linder, H. Peter, 2003, A Molecular Systematic Study of the Lampranthus Group (Aizoaceae) Based on the Chloroplast TrnL-trnF and Nuclear ITS and 5 S NTS Sequence Data, pp. 70-85 in Systematic Botany 28 (1) on page 84, DOI: 10.1043/0363-6445-28.1.70, http://zenodo.org/record/7872112
Alfven seismic vibrations of crustal solid-state plasma in quaking paramagnetic neutron star
Creators: name: Bastrukov, S.
name: Molodtsova, I.
name: Takata, J.
name: Chang, H. -K.
name: Xu, R. X.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Magneto-solid-mechanical model of two-component, core-crust, paramagnetic neutron star responding to quake-induced perturbation by differentially rotational, torsional, oscillations of crustal electron-nuclear solid-state plasma about axis of magnetic field frozen in the immobile paramagnetic core is developed. Particular attention is given to the node-free torsional crust-against-core vibrations under combined action of Lorentz magnetic and Hooke's elastic forces; the damping is attributed to Newtonian force of shear viscose stresses in crustal solid-state plasma. The spectral formulae for the frequency and lifetime of this toroidal mode are derived in analytic form and discussed in the context of quasi-periodic oscillations of the X-ray outburst flux from quaking magnetars. The application of obtained theoretical spectra to modal analysis of available data on frequencies of oscillating outburst emission suggests that detected variability is the manifestation of crustal Alfven's seismic vibrations restored by Lorentz force of magnetic field stresses.
description: 10 pages, 10 figures
Classification Model of Consumer Question about Motorbike Problems by Using Naïve Bayes and Support Vector Machine
Creators: name: Wicaksana, Ekky
name: Murdiansyah, Danang Triantoro
name: Kurniawan, Isman
Publisher: name: Indonesia Journal on Computing (Indo-JC)
Year: 2021

description: The motorbike plays an important role in supporting daily activity. The motorbike is known as one of the transportation modes that is frequently used in Indonesia. The number of motorbikes used in Indonesia is continuously increasing time by time. Hence, the occurrence of motorbike problems can affect community activity and disturb the economic condition in society. Since the problem of the motorbike can occur at any time, a prevention action is required by providing an online consultation platform. However, a classification model is required to handle a wide range of questions about the motorbike problem. By classifying those questions into a specific class of problems, the solution can be delivered to the consumer faster. In this study, we developed prediction models to classify consumer questions. The data set was collected from consumer questions regarding motorbike problems that are commonly occurring. The model was developed using two machine learning algorithms, i.e., Naïve Bayes and Support Vector Machine (SVM). Text vectorization was performed by using the n-gram and term frequency-inverse document frequency (TF-IDF) method. The results show that the SVM model with the uni-trigram model performs better with the value of accuracy and F-measure, which are 0.910 and 0.910, respectively.
description: Indonesia Journal on Computing (Indo-JC), Vol. 6 No. 2 (2021): September, 2021