cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Contemporary leadership practices & employee performance: Experienced from Ethiopian petroleum supply enterprise
Creators: name: Seyoum Aragaw
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Transactional Leadership, Transformational Leadership, Authentic leadership, Servant leadership, Employee Performance, Ethiopian petroleum supply enterprise

description: The global business environment is becoming volatile and increasingly competitive’’. The leadership style practiced by leaders at all level is, therefore, gaining importance to derive employees’ effectiveness, efficiency and service quality levels since employees are the key drivers of the organization. Leaders should demonstrate behavior that can excel employees’ performances and direct followers to achieve organizational goals and objectives. This study aims to examine the association and effects between the selected contemporary leadership styles dimensions and employee performance taking the case of Ethiopian Petroleum Supply Enterprise. In particulars, four types of leadership styles namely, transactional leadership, transformational leadership, authentic leadership and Servant leadership were considered. The research design were descriptive and explanatory with quantitative approach .The survey instruments were adopted from previous standard questionnaire with five-point Likert scaling to determine the practices of leadership styles on employee performance. The primary data was processed and analyzed using SPSS 26.Specified sample sizes were determined by convenient sampling technique with a sample size of sixty seven (67) for both management and nonmanagement respondents were selected out of the total target population within the enterprise head office. Validity test, reliability test (Cronbach,s alpha coefficient),descriptive, correlation and regression analyses were applied and presented. The findings on descriptive statistics transactional leadership, transformational, authentic and servant leadership styles were practiced and the findings on correlation analysis showed that these contemporary leadership styles have moderate associations on employees’ performance. The findings on regression analysis indicated that transformational & transactional leadership styles have positive significant effect whereas servant and authentic leadership styles have negative insignificant effects on employees’ performance. Therefore, the study concluded that the contemporary leadership styles were practiced even though there were differences in degree of significance between them. For the future, these results will contribute better understanding about the practices towards enhancement of employee performance. Furthermore, the researcher forwarded recommendation to have similar study related to oil companies to allow for generalization of findings on the practice of contemporary leaderships styles on employee performance at wider scopes to the petroleum sectors.
Discovery of the spectroscopic binary nature of the classical Cepheids FN Aql and V1344 Aql
Creators: name: Szabados, L.
name: Cseh, B.
name: Kovács, J.
name: Csák, B.
name: Dózsa, Á.
name: Szabó, Gy. M.
name: Simon, A. E.
name: Borkovits, T.
name: Kiss, L. L.
name: Jankovics, I.
name: Mező, Gy.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the analysis of photometric and spectroscopic data of two classical Cepheids, FN Aquilae and V1344 Aquilae. Based on the joint treatment of the new and earlier radial velocity data, both Galactic Cepheids have been found to be a member in a spectroscopic binary system. To match the phases of the earlier radial velocity data correctly with the new ones, we also determined the temporal behaviour of the pulsation period of these Cepheids based on all available photometric data. The O-C graph covering about half century shows slight changes in the pulsation period due to stellar evolution for both Cepheids.
description: 7 pages, 6 figures, 7 tables, accepted for publishing in the MNRAS
title: Les MITIC à l'école
title: quelles sont les plus-values, mais aussi les limites de leur emploi régulier, en particulier l'ordinateur, pour l'apprentissage en mathématiques des élèves ?
titleType: Subtitle
Creators: name: Saghbini, Charlotte
Publisher: name: Unknown
Year: 0
Subjects: subject: MITIC
subject: Médias, Images et Technologies de l’Information et de la communication
subject: Emploi
subject: Ordinateur
subject: Mathématiques
subject: Plus-values
subject: Limites

description: Notre société actuelle est souvent qualifiée d’hyperconnectée. La présence et l’emploi d’outils technologiques sont devenus une évidence, voire même une nécessité du quotidien de chaque individu, car l’environnement dans lequel nous évoluons est emprunt de technologies. Celles- ci offrent de nombreux avantages, mais peuvent aussi apporter des inconvénients, notamment à ceux qui ne s’y familiarisent pas. L’individu qui ne maîtrise pas les aspects techniques de ces outils technologiques peut être incommodé et se sentir vite dépassé. Pour éviter les aléas, il lui faut alors s’adapter à son l’environnement. Plus il sera confronté aux technologies, plus il s’y familiarisera facilement. L’Ecole prend une place très importante dans cette préparation aux technologies qui sont appelées Medias, Images et Technologies de l’Information et de la Communication (MITIC). Depuis un certain nombre d’années déjà, les directives en matière d’éducation prescrivent de plus en plus l’emploi de technologies dans l’enseignement. Les objectifs sous-jacents consistent de manière générale à développer et acquérir des compétences qui permettront à l’individu-élève d’être préparé à la vie dans notre société. Cela pose cependant diverses questions pratiques. A ce titre, il est intéressant de déterminer quels peuvent être les effets, à savoir les plus-values et/ou les limites, de cette intégration sur l’apprentissage des élèves. Par conséquent, à travers ce travail, je me propose de mesurer les conséquences d’enseigner avec les technologies sur les élèves en examinant ce qu’un enseignement emprunt de MITIC implique dans le développement et l’acquisition des compétences, mais également en déterminant dans quelle mesure ce type d’enseignement peut favoriser l’apprentissage, de sorte qu’il en résulte des plus-values. Ainsi, j’ai choisi de m’intéresser aux plus-values et aux limites de l’utilisation des MITIC dans une situation d’enseignement donnée, à savoir en mathématiques et au moyen de l’ordinateur.
description: Mémoire professionnel, Bachelor of arts en enseignement pour les degrés préscolaire et primaire
Comparative Analysis of controller for A magnetic Ball Levitation system
Creators: name: Getahun Nigatu
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Magnetic Levitation System, proportional-integral-differential controller, Genetic Algorithms, Adaptive with MRAC controller and Linear Quadratic Regulator Controller.

description: Magnetic levitation system is a system that can work on the principle of magnetic attraction and repulsion to levitate an object. Hence, their unique behavior is that it has zero frictional forces and no losses in which the force in mechanical system will balance the force in electrical system and it presents a mathematical modelling using a Taylor series approximation method. However, the magnetic ball levitation system is mostly a non-linear and open loop unstable. So, it made the controller strategy more difficult. This thesis work introduces the control techniques of a magnetic ball levitation system depends on a linear feedback controller which is a PID controller to adjust the parameter gain. Then the PID controller is more improved by an Adaptive PID with MRAC controller and was obtained a good performance characteristic. Increasing the performance of an Adaptive PID with MRAC Controller was possible with Genetic Algorithms optimization techniques and the objective function as well as the error were minimized by setting the initial range, population size, number of generations and stopping criterion. Lastly, for position control and stabilization of the magnetic ball levitation system an optimal LQR was developed and the weighting matrix Q and R based on the analytical approach was chosen as and are positive semidefinite and positive definite matrix respectively. So, the performance of an Adaptive PID with MRAC controller was more improved by a LQR controller; the performance (i.e., Percent overshoot, Peak amplitude and rising time) gained by a LQR controller was better when compared to a PID, an Adaptive PID with MRAC Controller and an Adaptive PID with GA Optimization techniques.
On the nature of jets from a main sequence companion at the onset of common envelope evolution
Creators: name: Soker, Noam
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: I consider a flow structure by which main sequence companions that enter a common envelope evolution (CEE) with giant stars might launch jets even when the accreted gas has a sub-Keplerian specific angular momentum. I first show that after a main sequence star enters the envelope of a giant star the specific angular momentum of the accreted gas is sub-Keplerian but still sufficiently large for the accreted gas to avoid two conical-like openings along the two opposite polar directions. I suggest that the high-pressure zone that the accreted gas builds around the main sequence equatorial plane accelerates outflows along these polar opening. Most of the inflowing gas is deflected to the polar outflows, i.e., two oppositely-directed jets. The actual mass that the main sequence star accretes is only a small fraction, ~0.1, of the inflowing gas. However, the gravitational energy that this gas releases powers the inflow-outflow streaming of gas and adds energy to the common envelope ejection. This flow structure might take place during a grazing envelope evolution if it occurs, during the early CEE, and possibly in some post-CEE cases. This study increases the parameter space for main sequence stars to launch jets. Such jets might shape some morphological features in planetary nebulae, add energy to mass removal in CEE, and power some intermediate luminosity optical transients.
description: Accepted for publication in Research in Astronomy and Astrophysics
Characterization of Allelochemicals from Shoot & Root Extracts of Teff. (Eragrostist tef.L ) & Its inhibitory Potential on latuca sativa.L & Setaria Pumila . P Seed Germination
Creators: name: Gebiyaw Tilaye
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: Allelochemical, Antioxidant activity, bioherbicide, Extraction, Germination bioassay, and Isolation

description: This study was conducted to isolate, determine and identify allelochemicals from teff and to evaluate its allelopathic potentials as bio-herbicide. It was also further, investigated for antioxidant potentials of teff shoot and root extracts. Ten teff accessions were grown in growth chamber at 25/180C and 13/11 day/ night temperature. The allelopathic effect was tested by using petri dish method with 5ml methanol extracts of teff. Three germination parameters were measured from the germination bioassay. All shoot and root extracts of teff had allelopathic effect against to the germination of test seeds comparing to the control. Total flavonoid and total phenol content were estimated by using quercetin and gallic acid as standard with Uv- spectrophotometer. Shoot extracts have high phenol and flavonoid content than root extracts. from teff shoot extracts ST-22, has the highest quantity of phenol, with 74.98±0.00 mg gallic acid equivalents per grams of teff shoot extract dry weight. And, ST-14 has the highest contents of total flavonoids with value of 283.95±0.5 mg of quercetin equivalent per grams of teff shoot extracts. The highest percentage inhibition was observed in ST-13 and ST-19 with free radical scavenging potential of 85.2 ± 0.2 and 85.1 ± 0.13 consecutively. The extracts of teff shoot and root showed free radical scavenging activity. 1µl of hexane extract was injected for GC-MS identification of allelochemicals. Fifteen phytochemicals were identified from shoot extracts of teff by using GC-MS. From the evaluated accessions T-14, T-5, T-20 and T-22 accessions were the most competitive variety against selected weeds. Whereas, T-13, T-19 teff accessions were the medium competitive accessions against selected weeds. Accessions of T-23, T-24 and T-18 were the least suppressive teff cultivars against weeds.
Civic Participation Faces Resentment: Right-wing Movements in Brazil and the Crisis of Dem
Creators: name: Caminhas, Lorena
name: Lelo, Thales Vilela
Publisher: name: Universita' degli Studi di Salerno
Year: 2020
Subjects: Democracy
Conservatism
Political Mobilization
Civil Society
Resentment

description: Since 2015, Brazil has been experiencing the explosion of right-wing protests. These pro-tests were assembled by groups organised in digital media, which claimed forms of demo-cratic participation to propagate antidemocratic ideas, such as the shutdown of public poli-cies based on social redistribution of resources to the poorest; the criminalization of the so-cial movements linked to social minorities; and the extinction of councils of popular parti-cipation. In this article, we develop a discourse analysis on the Facebook pages of the three major right-wing groups in Brazil, namely, Movimento Brasil Livre (MBL), Vem Pra Rua, and Movimento Contra a Corrupção(MCC). Our sample is composed of 468 posts made by these three groups when they established profiles on Facebook and at the moment of the major right-wing civil protests in Brazil between 2015 and 2018. We aim to understand the discursive strategies adopted by these groups to undermine democratic citizenship purpor-tedly laying claim to its normative terms. We argue that these movements show the dark face of civic action’s supposed virtuosity: a vengeful form of resentment.
Identification of core-periphery structure in networks
Creators: name: Zhang, Xiao
name: Martin, Travis
name: Newman, M. E. J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Social and Information Networks (cs.SI)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Many networks can be usefully decomposed into a dense core plus an outlying, loosely-connected periphery. Here we propose an algorithm for performing such a decomposition on empirical network data using methods of statistical inference. Our method fits a generative model of core-periphery structure to observed data using a combination of an expectation--maximization algorithm for calculating the parameters of the model and a belief propagation algorithm for calculating the decomposition itself. We find the method to be efficient, scaling easily to networks with a million or more nodes and we test it on a range of networks, including real-world examples as well as computer-generated benchmarks, for which it successfully identifies known core-periphery structure with low error rate. We also demonstrate that the method is immune from the detectability transition observed in the related community detection problem, which prevents the detection of community structure when that structure is too weak. There is no such transition for core-periphery structure, which is detectable, albeit with some statistical error, no matter how weak it is.
IPERION HS D.9.1 POPD Requirement no. 1
Creators: name: Striova, Jana
name: Benassi, Laura
name: Arminio, Stefania
Publisher: name: Zenodo
Year: 2023
Subjects: Ethics, GDPR

description: The host institution confirms that it has appointed a Data Protection Officer (DPO) and the contact details of the DPO were made available to all subjects involved in the research.
Better Safe Than Sorry! Automated Identification of Functionality-Breaking Security-Configuration Rules
Creators: name: Stöckle, Patrick
name: Sammereier, Michael
name: Grobauer, Bernd
name: Pretschner, Alexander
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Insecure default values in software settings can be exploited by attackers to compromise the system that runs the software. As a countermeasure, there exist security-configuration guides specifying in detail which values are secure. However, most administrators still refrain from hardening existing systems because the system functionality is feared to deteriorate if secure settings are applied. To foster the application of security-configuration guides, it is necessary to identify those rules that would restrict the functionality. This article presents our approach to use combinatorial testing to find problematic combinations of rules and machine learning techniques to identify the problematic rules within these combinations. The administrators can then apply only the unproblematic rules and, therefore, increase the system's security without the risk of disrupting its functionality. To demonstrate the usefulness of our approach, we applied it to real-world problems drawn from discussions with administrators at Siemens and found the problematic rules in these cases. We hope that this approach and its open-source implementation motivate more administrators to harden their systems and, thus, increase their systems' general security.
description: Peer-reviewed version accepted for publication at the 4th ACM/IEEE International Conference on Automation of Software Test (AST 2023), May 15--16, 2023, Melbourne, AU
Tides on Europa: the membrane paradigm
Creators: name: Beuthe, Mikael
Publisher: name: arXiv
Year: 2014
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Jupiter's moon Europa has a thin icy crust which is decoupled from the mantle by a subsurface ocean. The crust thus responds to tidal forcing as a deformed membrane, cold at the top and near melting point at the bottom. In this paper I develop the membrane theory of viscoelastic shells with depth-dependent rheology with the dual goal of predicting tidal tectonics and computing tidal dissipation. Two parameters characterize the tidal response of the membrane: the effective Poisson's ratio $\barν$ and the membrane spring constant $Λ$, the latter being proportional to the crust thickness and effective shear modulus. I solve membrane theory in terms of tidal Love numbers, for which I derive analytical formulas depending on $Λ$, $\barν$, the ocean-to-bulk density ratio and the number $k_2^o$ representing the influence of the deep interior. Membrane formulas predict $h_2$ and $k_2$ with an accuracy of a few tenths of percent if the crust thickness is less than one hundred kilometers, whereas the error on $l_2$ is a few percents. Benchmarking with the thick-shell software SatStress leads to the discovery of an error in the original, uncorrected version of the code that changes stress components by up to 40%. Regarding tectonics, I show that different stress-free states account for the conflicting predictions of thin and thick shell models about the magnitude of tensile stresses due to nonsynchronous rotation. Regarding dissipation, I prove that tidal heating in the crust is proportional to $Im Λ$ and that it is equal to the global heat flow (proportional to $Im k_2$) minus the core-mantle heat flow (proportional to $Im k_2^o$). As an illustration, I compute the equilibrium thickness of a convecting crust. More generally, membrane formulas are useful in any application involving tidal Love numbers such as crust thickness estimates, despinning tectonics or true polar wander.
description: 69 pages, 13 figures, 11 tables, accepted for publication in Icarus
Causes & Effect of Building Constriction Project Delay: The Case of Defense Construction Enterprise (DCE
Creators: name: Seada   Yesuf
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021
Subjects: cause of delay, effect of delay, minimization of delay, defense construction enterprise

description: Construction industry is one of the significant contributors to the economic growth and development of Ethiopia. However problem of delays in the construction sector is a global phenomenon and the construction sector in Ethiopia is no exception. Therefore, the aim of this study is to analyze for construction project delayandits effectin defense construction enterprise. Purposive (non-probability, deliberate) sampling technique was used in this study. The researcher used both quantitative & qualitative research approaches for this study. Population sample of 110 was used in this work. From the total sample eight four (84) was deployed. A structured questionnaire in Likert scale was used in data collection. Forty nine (49) project delay attributes were identified and six (6) effect of delay through detailed literature review. This research categorized the causes of delay under seven main groups of client related, consultant related, contractor related, labor related‚ equipment related, material related, external related factors. These factors were ranked using the Likert scale and analyzed using Relative Importance Index (RII). The research indicates that the top major causes of delay in DCE were delay in Difficulties in financing project by contractor, Shortage of construction materials in market, Change orders by owner during construction, Fluctuations in cost/ currency, Ineffective planning and scheduling of project, Delays in producing design documents, Mistakes and discrepancies in design Documents, Delays in sub-contractors work and Late in revising and approving design documents. The study further determines that the major effects of delay were time overrun, cost overrun, dispute between contracting parties, arbitration, Total abandonment and , Litigation. Finally the researcher recommended what to be done in the future.
Heterotic Surface Defects and Dualities from 2d/4d Indices
Creators: name: Chen, Heng-Yu
name: Chen, Hsiao-Yi
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Starting with the superconformal indices for 4d N=2 and N=1 supersymmetric gauge theories, which are related by superpotential deformation, we perform the contour integrations and isolate the residue contributions which can be attributed to the surface defects. These defects can be interpreted as the IR limit of dynamical vortices. Given the 2d N=(2,2) and N=(0,2) world sheet theories for these surface defects, we then verify this statement by explicitly computing their elliptic genera and identifying their fugacity parameters through superconformal algebras. We show them precisely match, and the results extend previous prescriptions for inserting surface defects into 4d supersymmetric partition functions to N=1 setting. We also study how 4d N=1 IR dualities descend into the N=(0,2) world sheet theories of their surface defects, and extend the N=(2,2) triality observed earlier to other N=(0,2) surface defects unrelated to dynamical vortices.
description: 39 pages, 2 figures
An Assessment of managing & Minimizing Procedures of construction material wastage: The case of Federal Housing Corporation building projects located, Addis Ababa, Ethiopian
Creators: name: Kelil Aliyi
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021

description: The study has attempt to assess the current situation of managing wastage of construction materials, the case of federal housing corporation building projects in the Addis Ababa on selected building construction projects. The main tools for the collection of data included questionnaires, interviews and site visit were used to identify the various efforts that have been made in the past to evaluate and examine the causes and sources of construction materials waste on Managing and Minimizing Wastage of construction Materials on selected Federal Housing Corporation building projects in Addis Ababa. Simple statistical analysis involving tables and percentages were used in analyze the results from the questionnaire. Secondary sources of data were obtained from relevant literature that covered research, publication on the subject matter. The study indicates that the level of contribution of the waste sources to the generation of waste saw differences between the perceptions of the respondents (Contractors, consultants and client). The results from analysis ranked from the first to fifth position by contractors, consultants and FHC staffs that the most significant factors causing construction waste on building construction projects are: Operations factors, Site management and practices factors, Site supervision factors, Materials handling and storage factors, Design and documentation factors. Based on major findings of the study the researcher has recommended that there is a need to establish a new construction waste department to develop waste management policies and develop the effective strategy to reduce construction waste. Moreover, the study has also recommended the consultants to give attention to avoid design and planning errors at the design and planning stages. Besides, the study also recommended the contractors to assign qualification staff and workforce in construction projects and to prepare waste management plan.
Statistical Study of the Correlation between Solar Energetic Particles and Properties of Active Regions
Creators: name: Marroquin, Russell D.
name: Sadykov, Viacheslav
name: Kosovichev, Alexander
name: Kitiashvili, Irina N.
name: Oria, Vincent
name: Nita, Gelu M.
name: Illarionov, Egor
name: O'Keefe, Patrick M.
name: Francis, Fraila
name: Chong, Chun-Jie
name: Kosovich, Paul
name: Ali, Aatiya
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The flux of energetic particles originating from the Sun fluctuates during the solar cycles. It depends on the number and properties of Active Regions (ARs) present in a single day and associated solar activities, such as solar flares and coronal mass ejections (CMEs). Observational records of the Space Weather Prediction Center (SWPC NOAA) enable the creation of time-indexed databases containing information about ARs and particle flux enhancements, most widely known as Solar Energetic Particle events (SEPs). In this work, we utilize the data available for Solar Cycles 21-24, and the initial phase of Cycle 25 to perform a statistical analysis of the correlation between SEPs and properties of ARs inferred from the McIntosh and Hale classifications. We find that the complexity of the magnetic field, longitudinal location, area, and penumbra type of the largest sunspot of ARs are most correlated with the production of SEPs. It is found that most SEPs ($\approx$60\%, or 108 out of 181 considered events) were generated from an AR classified with the 'k' McIntosh subclass as the second component, and these ARs are more likely to produce SEPs if they fall in a Hale class containing $δ$ component. The resulting database containing information about SEP events and ARs is publicly available and can be used for the development of Machine Learning (ML) models to predict the occurrence of SEPs.
description: 27 pages, 7 figures, 1 table
What is the influence of government programs on farmer organizations and their impacts? Evidence from Zambia
Creators: name: Minah, Margitta
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: agricultural cooperative
subject: collective action
subject: input subsidy program
subject: 330 Wirtschaft

description: Governments and donors often promote farmer organizations (FOs) in the implementation of their agricultural development programs. Yet, there is a lot of uncertainty whether externally supported FOs provide benefits beyond the channelling of programs. This paper uses Propensity Score Matching (PSM) and representative data from 4,074 Zambian households to estimate FO impacts on members, with and without controlling for a national input-subsidy program. The results show that Zambian FOs tend to attract better-educated households with larger farm sizes, but can lead to female integration when external subsidies are involved. FOs also have a significantly positive effect on members’ farm performance, irrespective of whether members receive input subsidies, while the presence of the external program leads to an unequal distribution of benefits within the FOs: positive impacts on farm performance are, on average 13–44% lower amongst members who do not benefit from the Zambian government program. Overall, these findings imply that Zambian FOs seem to provide benefits that go beyond the intention of the subsidy-program, which can be used to promote women empowerment and smallholder farm performance. The findings also demonstrate, however, that governments need to carefully design their programs to not reinforce inequality amongst farmer organizations and their members.
Maser and Infrared Studies of Oxygen-Rich Late/Post-AGB Stars and Water Fountains: Development of a New Identification Method
Creators: name: Yung, Bosco
name: Nakashima, Jun-ichi
name: Henkel, Christian
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We explored an efficient method to identify evolved stars with oxygen-rich envelopes in the late AGB or post-AGB phase of stellar evolution, which include a rare class of objects - the "water fountains". Our method considers the OH and H2O maser spectra, the near infrared Q-parameters (these are colour indices accounting for the effect of extinction), and far-infrared AKARI colours. Here we first present the results of a new survey on OH and H2O masers. There were 108 colour-selected objects: 53 of them were observed in the three OH maser lines (1612, 1665, and 1667 MHz), with 24 detections (16 new for 1612 MHz); and 106 of them were observed in the H2O maser line (22 GHz) with 24 detections (12 new). We identify a new potential water fountain source, IRAS19356+0754, with large velocity coverages of both OH and H2O maser emission. In addition, several objects with high velocity OH maser emission are reported for the first time. The Q-parameters as well as the infrared [09]-[18] and [18]-[65] AKARI colours of the surveyed objects are then calculated. We suggest that these infrared properties are effective in isolating aspherical from spherical objects, but the morphology may not necessarily be related to the evolutionary status. Nonetheless, by considering altogether the maser and infrared properties, the efficiency of identifying oxygen-rich late/post-AGB stars could be improved.
description: 57 pages, 7 figures, 5 tables; accepted for publication in ApJ
The Excavation of a medieval bake/brewhouse at The Elms, Brackley, Northamptonshire, January 1999
Creators: name: Atkins, Rob
name: Chapman, Andy
name: Holmes, Mark
Publisher: name: Archaeology Data Service
Year: 2020

description: Northamptonshire Archaeology, 28, 5-24
description: Excavation on land at The Elms, High Street, Brackley found activity dating from the 12th century to the second half of the 14th century. The first evidence of land use was several pits dating probably between AD1150-1250. These are presumed to lie within plots to the rear of domestic buildings fronting onto the High Street. In the mid to late 13th century the back plot was developed as a stone built "L"-shaped building, probably a detached bake-house and kitchen complex with possible storage rooms; a metalled track ran from the building towards the street. Later a malt oven was inserted into the south-west room. The malthouse/bakehouse was demolished probably in the second half of the Bath century and its walls were partly robbed and quarried for stone. The abandonment of the site seems to have mirrored the economic collapse of Brackley in this period and the resultant contraction in the town's size. Afterwards the site was never reoccupied
Excavation of the Town Defences at Green Street, Northampton, 1995-6
Creators: name: Chapman, Andy
Publisher: name: Archaeology Data Service
Year: 2020

description: Northamptonshire Archaeology, 28, 25-60
description: Excavation at Green Street, Northampton has located the best preserved and most complete sequence of Northampton's town defences so far discovered. A clay bank with a timber revetment, and a substantial ditch were probably constructed in the earlier 10th century, either late in the Danish occupation or shortly after the late Saxon re-conquest. The revetment was later rebuilt in stone, and a contemporary gateway with metalled road surfaces was aligned on the present Green Street, a minor lane that can now be seen as the fossilised remnant of a major early access road. The gateway was blocked in the 12th century at the construction of the medieval town wall. A final use of the defences in the Civil War is represented by two shallow ditches cut into the largely filled medieval ditch.
Gravitating Dyons in Vaidya Geometry
Creators: name: Tripathi, Buddhi Vallabh
name: Nandan, Hemwati
name: Dehnen, Heinz
name: Purohit, K D
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Gravitating monopoles and dyons in Einstein-Yang-Mills (EYM) or Einstein-Yang-Mills-Higgs (EYMH) systems have been extensively studied for various curved spacetimes, including those of black holes. We construct dyonic solutions of the EYMH theory in Vaidya spacetime using a set of generalized Julia-Zee ansatz for the fields. It is found that the dyonic charge is static in nature and it does not contribute to the energy of the null dust.
description: 13 pages
A Story of Urban Regeneration: Excavations in Advance of Development off St Peter's Walk, Northampton, 1994-7
Creators: name: Soden, Iain
Publisher: name: Archaeology Data Service
Year: 2020

description: Northamptonshire Archaeology, 28, 61-128
description: This report presents the data from excavations carried out ahead of and during redevelopment of an area around Woolmonger Street between 1994 and 1997. The fieldwork and the current report were funded by Wimpey Commercial Property Ltd, in discharge of a section 106 planning agreement. The extensive fieldwork was carried out following a programme of desk-based assessment and on-site evaluation, which gave rise to a tripartite arrangement of some pre-emptive archaeological record some intensive watching-brief recording and a strategy for partial preservation in-situ. The present report draws upon all of the evidence and has taken account of published and unpublished data from previous excavations on the site since 1981 which offer information on areas and levels now preserved below the latest redevelopment. The data produced evidence for occupation from the early-middle Saxon period through the late Saxon, medieval and post-medieval periods. There is documentary evidence to corroborate some of the excavation results and still more to challenge future work in the area. Evidence has been found for Saxon and medieval town planning, aspiration to wealth and status, trade and industry, social organisation in the home, and change and decay within the wider picture of the history of Northampton, the area of the Danelaw and the midlands.
Light Stop Decays: Implications for LHC Searches
Creators: name: Grober, R.
name: Muhlleitner, M.
name: Popenda, E.
name: Wlotzka, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We investigate the flavour-changing neutral current decay of the lightest stop into a charm quark and the lightest neutralino and its four-body decay into the lightest neutralino, a down-type quark and a fermion pair. These are the relevant stop search channels in the low-mass region. The SUSY-QCD corrections to the two-body decay have been calculated for the first time and turn out to be sizeable. In the four-body decay both the contributions from diagrams with flavour-changing neutral current (FCNC) couplings and the mass effects of final state bottom quarks and $τ$ leptons have been taken into account, which are not available in the literature so far. The resulting branching ratios are investigated in detail. We find that in either of the decay channels the branching ratios can deviate significantly from one in large parts of the allowed parameter range. Taking this into account, the experimental exclusion limits on the stop, which are based on the assumption of branching ratios equal to one, are considerably weakened. This should be taken into account in future searches for light stops at the next run of the LHC, where the probed low stop mass region will be extended.
L'influence du temps libre sur le projet professionnel des élèves lors de la transition du secondaire I au secondaire II
Creators: name: Cattaneo, Sarah
Publisher: name: Unknown
Year: 0
Subjects: subject: Temps libre
subject: activités mimétiques extrascolaires
subject: compétences transversales
subject: motivation
subject: projet professionnel
subject: secondaire I

description: L’influence du temps libre sur le projet professionnel des élèves lors de la transition du secondaire I au secondaire II. Une multitude d’activités extrascolaires sont proposées aux élèves afin de les stimuler et favoriser leur développement cognitif et social. Ces activités sont dites mimétiques par leur caractère de loisir mais avec des propriétés plus ou moins structurées. Elles sont pratiquées en dehors du temps scolaire mais peuvent avoir un rôle de soutient pendant l’élaboration d’un projet professionnel ou scolaire lors de la transition entre le secondaire I et le secondaire II. Le projet professionnel ou scolaire élaboré par les élèves à la fin de leur scolarité obligatoire est un moment durant lequel les élèves doivent prendre en compte leurs intérêts, le monde du travail ou scolaire et leur capacité à atteindre le but fixé. Seule une motivation liée au projet permettrait de réussir ce passage. La pratique d’activités extrascolaire permettrait d’atteindre cette situation. En effet, les activités mimétiques favorisent l’acquisition de compétences transversales et permettent ainsi de mieux cerner une situation d’apprentissage, un problème ou une question. Seule une motivation intrinsèque liée à l’activité permettrait à cette dernière d’être une source de développement de compétences transversales. Dans cette perspective l’hypothèse est de déterminer si les élèves pratiquant une activité mimétique durant leur temps libre ont une motivation plus importante quant à leur projet de formation (scolaire et/ou professionnel). Les résultats obtenus montrent que les élèves développent de nouvelles compétences par les activités mimétiques extrascolaires choisies sans contrainte et qui sont ainsi pratiquées avec plaisir. Les résultats n’ont pas montré un lien entre ces activités et la motivation sur le projet professionnel. Seuls les élèves ayant choisi l’apprentissage ont utilisé les activités extrascolaires comme source pour aboutir à un projet professionnel. La motivation semble être plus déterminée par l’imminence du projet qu’uniquement par l’activité mimétique elle-­‐même, qui malgré tous reste une source de compétences transversales.
description: Mémoire professionnel, Diplôme d'enseignement pour le degré secondaire I
3D Finite Element Modeling and Simulation of Injection Stretch Blow Molding of PET Bottle (Case Study on Aquadis Spring Water Bottle)
Creators: name: Wogderes G/Medhin
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2021

description: There is numerous hyper-elastic material model in FE packages. Selection of the appropriate model is difficult to model a problem. So evaluation of the material model based on the experimental data is necessary. The predicted data of the hyper-elastic model is evaluated with the experimental data using error analysis and correlation between the predicted and experimental data. The instability of the material model from the material constants and the stress-strain relation is also evaluated. The evaluation result showed that the Mooney Rivlin model is stable for all strains for both biaxial tension and compression. However, it experienced the largest error and fit the test data poorly. Neo-Hookea model is stable for all strains for both biaxial tension and compression. However, this model has a large error next to Mooney-Rivlin and is far from the experimental strain-stress curve. Ogden and polynomial strain energy function N = 2 models fit the test data best, however, they are unstable. Yeoh model is stable for all strains for both biaxial tension and compression at each data point. The error between each data is small, which is less than 4%. Yeoh model was selected based on the material evaluation criteria. Then the result of this model was evaluated with the blowing process. The evaluation was based on the relation of the large deformation and strain evaluation criteria. To model the actual process, the complex contact between components is controlled using non-default contact controlling formulations. This controlled the contact as well as unnecessary motion of the rigid instances which results in instability and non-convergence issues in the solution. Finally, the deformation, stress, and contact in the model are analyzed. And the deformation result of the simulation and the actual bottle was compared. This result showed, the percentage in maximum axial deformation of the preform during the simulation was 302% and the actual deformation of the preform during the blowing is 306%. The error between the two results was 1.3%. The aspect ratio result showed the error between the two aspect ratios is 1.82%. This means that the actual bottle shape and the simulation result are 98.12% similar. Therefore, the Yeoh model can deform as similar as the actual process and the basic shape of the bottle predicted accurately
title: Chemical Geodynamics Insights From a Machine Learning Approach
Creators: name: Stracke, Andreas
name: Willig, M.
name: Genske, Felix
name: Béguelin, P.
name: Todd, E.
Publisher: name: University of Muenster, Institutional Repository MIAMI
Year: 2023
Subjects: subject: 550 Earth sciences

description: The radiogenic isotope heterogeneity of oceanic basalts is often assessed using 2D isotope ratio diagrams. But because the underlying data are at least six dimensional (87Sr/86Sr, 143Nd/144Nd, 176Hf/177Hf, and 208,207,206Pb/204Pb), it is important to examine isotopic affinities in multi-dimensional data space. Here, we apply t-distributed stochastic neighbor embedding (t-SNE), a multi-variate statistical data analysis technique, to a recent compilation of radiogenic isotope data of mid ocean ridge (MORB) and ocean island basalts (OIB). The t-SNE results show that the apparent overlap of MORB-OIB data trends in 2-3D isotope ratios diagrams does not exist in multi-dimensional isotope data space, revealing that there is no discrete "component" that is common to most MORB-OIB mantle sources on a global scale. Rather, MORB-OIB sample stochastically distributed small-scale isotopic heterogeneities. Yet, oceanic basalts with the same isotopic affinity, as identified by t-SNE, delineate several globally distributed regional domains. In the regional geodynamic context, the isotopic affinity of MORB and OIB is caused by capturing of actively upwelling mantle by adjacent ridges, and thus melting of mantle with similar origin in on, near, and off-ridge settings. Moreover, within a given isotopic domain, subsidiary upwellings rising from a common deep mantle root often feed OIB volcanism over large surface areas. Overall, the t-SNE results define a fundamentally new basis for relating isotopic variations in oceanic basalts to mantle geodynamics, and may launch a 21st century era of "chemical geodynamics."
description: Finanziert über die DEAL-Vereinbarung mit Wiley 2019-2022.
Deviations from piecewise linearity in the solid-state limit with approximate density functionals
Creators: name: Vlček, Vojtěch
name: Eisenberg, Helen R.
name: Steinle-Neumann, Gerd
name: Kronik, Leeor
name: Baer, Roi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: In exact density functional theory (DFT) the total ground-state energy is a series of linear segments between integer electron points, a condition known as "piecewise linearity". Deviation from this condition is indicative of poor predictive capabilities for electronic structure, in particular of ionization energies, fundamental gaps, and charge transfer. In this article, we take a new look at the deviation from linearity (i.e., curvature) in the solid-state limit by considering two different ways of approaching it: a large finite system of increasing size and a crystal represented by an increasingly large reference cell with periodic boundary conditions. We show that the curvature approaches vanishing values in both limits, even for functionals which yield poor predictions of electronic structure, and therefore can not be used as a diagnostic or constructive tool in solids. We find that the approach towards zero curvature is different in each of the two limits, owing to the presence of a compensating background charge in the periodic case. Based on these findings, we present a new criterion for functional construction and evaluation, derived from the size-dependence of the curvature, along with a practical method for evaluating this criterion. For large finite systems we further show that the curvature is dominated by the self-interaction of the highest occupied eigenstate. These findings are illustrated by computational studies of various solids, semiconductor nanocrystals, and long alkane chains.
description: 12 pages, 5 figures
Excavation of an Iron Age settlement and a Middle Saxon cemetery at Great Houghton, Northampton, 1996
Creators: name: Chapman, Andy
Publisher: name: Archaeology Data Service
Year: 2020

description: Northamptonshire Archaeology, 29, 1-41
description: A corridor 400m long by 15m wide along the course of a proposed Anglian Water pipeline was stripped under archaeological supervision to determine the presence and character of any archaeological remains. The dense palimpsest of features located was sampled in an archaeological recording action. The majority of the features related to an extensive area of Iron Age settlement. The earliest activity probably comprised unenclosed posthole pit groups. A sub-rectangular ditched enclosure contained numerous pits, and in one an adult inhumation burial with a lead alloy neck ring or torc around its neck has been radiocarbon dated to the early 4th century BC. To the east, a roundhouse ring ditch lay outside a small oval enclosure. Settlement began at the end of the early Iron Age, at 400 BC, and continued through the middle Iron Age. It was abandoned in the early 1st century AD. A group of 23 inhumation burials, all aligned west-to-east, and without grave goods, formed the southern part of a cemetery of unknown extent. A single radiocarbon date indicates that it was a Christian cemetery dating to the second half of the 7th century. The burials produced much evidence for healed traumatic injuries, and a high incidence of anatomical variance may indicate that they were from a small, inbred community. One individual shared an uncommon genetic trait with the Iron Age pit burial. At the western end of the area a group of rectangular clay pits of medieval date were aligned on the ridge and furrow of the medieval field system.