cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Open Archaeology and the community s sense
Creators: name: Amarras
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
title: The forebrain-specific overexpression of acid sphingomyelinase induces depressive-like symptoms in mice
Creators: name: Zoicas, Iulia
name: Schumacher, Fabian
name: Kleuser, Burkhard
name: Reichel, Martin
name: Gulbins, Erich
name: Fejtova, Anna
name: Kornhuber, Johannes
name: Rhein, Cosima
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 570 Biowissenschaften; Biologie

description: Human and murine studies identified the lysosomal enzyme acid sphingomyelinase (ASM) as a target for antidepressant therapy and revealed its role in the pathophysiology of major depression. In this study, we generated a mouse model with overexpression of Asm (Asm-tg(fb)) that is restricted to the forebrain to rule out any systemic effects of Asm overexpression on depressive-like symptoms. The increase in Asm activity was higher in male Asm-tg(fb) mice than in female Asm-tg(fb) mice due to the breeding strategy, which allows for the generation of wild-type littermates as appropriate controls. Asm overexpression in the forebrain of male mice resulted in a depressive-like phenotype, whereas in female mice, Asm overexpression resulted in a social anxiogenic-like phenotype. Ceramides in male Asm-tg(fb) mice were elevated specifically in the dorsal hippocampus. mRNA expression analyses indicated that the increase in Asm activity affected other ceramide-generating pathways, which might help to balance ceramide levels in cortical brain regions. This forebrain-specific mouse model offers a novel tool for dissecting the molecular mechanisms that play a role in the pathophysiology of major depression.
description: Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1186
Linearized Kompaneetz equation as a relativistic diffusion
Creators: name: Haba, Z.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We show that Kompaneetz equation describing photon diffusion in an environment of an electron gas, when linearized around its equilibrium distribution, coincides with the relativistic diffusion discussed in recent publications. The model of the relativistic diffusion is related to soluble models of imaginary time quantum mechanics. We suggest some non-linear generalizations of the relativistic diffusion equation and their astrophysical applications (in particular to the Sunyaev-Zeldovich effect).
description: 12 pages
Gérard Bataille, Research engineer, responsible for scientific partnerships at Inrap
Creators: name: Weber, Elsa
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
Additional file 2: of Expanded base editing in rice and wheat using a Cas9-adenosine deaminase fusion
Creators: name: Li, Chao
name: Zong, Yuan
name: Wang, Yanpeng
name: Jin, Shuai
name: Zhang, Dingbo
name: Song, Qianna
name: Zhang, Rui
name: Gao, Caixia
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Space Science
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
subject: FOS: Biological sciences
subject: Virology

description: Figure S1. The sequences of the sgRNA expression vectors for rice and wheat. Figure S2. Product purity of plant ABE for rice genomic sites. Figure S3. Product purity of plant ABE for wheat genomic sites. Figure S4. The effect of spacer length of esgRNA on indel efficiency. Figure S5. Identification and analysis of the rice plantlets with targeted A to G conversions by pH-PABE-7-esgRNA. Figure S6. Identification and analysis of the wheat plantlets with targeted A to G conversions by PABE-7. Figure S7. Constructs used for base editing of TaDEP1 and TaGW2 and detection of transgene integration in the resultant T0 mutants. Table S1. Description of sgRNA target sites and sequences. Table S2. Potential off-target sites analyzed for OsACC-T1 endogenous genomic loci. Table S3. PCR primers used in this study. (DOC 6095Â kb)
Towards a model of the urban development process
Creators: name: Gutstein, Donald Irwin
Publisher: name: University of British Columbia
Year: 2012

description: In recent years, dissatisfaction with the quality of the urban environment has become widespread, and opposition to many development proposals has been mounted by citizens groups across Canada. Yet all attempts to improve the environment so far have proved relatively ineffectual. The thesis argues that the environment will continue to deteriorate unless massive changes are made in the structure of decision making which surrounds the urban development process; the major change required being meaningful participation by citizens in making the decisions that affect their lives. A first step towards this goal is the attainment of a clear and comprehensive understanding of how urban development occurs at present. Citizens must be informed before they can be involved. The thesis presents an initial description of the urban development process and outlines the conceptual basis for the construction of a simulation model of the process. It is argued that because of the complexities of urban development, a simulation technique seems appropriate. Given an operating model, it would be possible to test proposals for change on the model before implementing them in reality. Using Metropolitan Vancouver - a typical Canadian urban region - as a data base, the thesis examines the types of public dissatisfactions with the urban environment. These are then translated into the more general categories of urban problems, such as soaring housing costs, transportation congestion, urban sprawl, poverty, pollution and so on. Through a literature survey a number of processes suspected as being related to these urban problems were identified. Two kinds of processes emerged: those which lead to population and economic growth (the ones usually considered in urban models), but also those processes which constrain policy formulation and implementation, such as fragmented authority, inadequate research and development, uncoordinated planning, the pressure of developers. Both types need inclusion in the model. These processes were investigated through a number of case studies of the system in action: downtown redevelopment schemes, Vancouver transportation proposals, a public urban renewal project, a shopping centre proposal, etc. Basic chronologies of events were prepared for each case; the events were then abstracted into a set of actions with the (organizational and individual) actors who engaged in them and the criteria (goals or constraints) upon which the actions were based. These actions were then grouped into related processes. A preliminary conceptual mock-up of the model was made, and a program of research outlined which involves the analysis of factors affecting major processes and the development of values suitable for computer manipulation. At this stage of the work it appears that the building of the model is indeed feasible and that such a simulation will prove most useful in understanding the urban development process.
Proposed method of combining continuum mechanics with Einstein Field Equations
Creators: name: Ogonowski, Piotr
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The article proposes an amendment to the relativistic continuum mechanics which introduces the relationship between density tensors and the curvature of spacetime. The resulting formulation of a symmetric stress-energy tensor for a system with an electromagnetic field, leads to the solution of Einstein Field Equations indicating a relationship between the electromagnetic field tensor and the metric tensor. In this EFE solution, the cosmological constant is related to the invariant of the electromagnetic field tensor, and additional pulls appear, dependent on the vacuum energy contained in the system. In flat Minkowski spacetime, the vanishing four-divergence of the proposed stress-energy tensor expresses relativistic Cauchy's momentum equation, leading to the emergence of force densities which can be developed and parameterized to obtain known interactions. Transformation equations were also obtained between spacetime with fields and forces, and a curved spacetime reproducing the motion resulting from the fields under consideration, which allows for the extension of the solution with new fields.
description: Published in International Journal of Modern Physics D, 2022
title: Reducing variability and removing natural light from nighttime satellite imagery: A case study using the VIIRS DNB
Creators: name: Coesfeld, Jacqueline
name: Kuester, Theres
name: Kuechly, Helga U.
name: Kyba, Christopher C. M.
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 550 Geowissenschaften

description: Temporal variation of natural light sources such as airglow limits the ability of night light sensors to detect changes in small sources of artificial light (such as villages). This study presents a method for correcting for this effect globally, using the satellite radiance detected from regions without artificial light emissions. We developed a routine to define an approximate grid of locations worldwide that do not have regular light emission. We apply this method with a 5 degree equally spaced global grid (total of 2016 individual locations), using data from the Visible Infrared Imaging Radiometer Suite (VIIRS) Day-Night Band (DNB). This code could easily be adapted for other future global sensors. The correction reduces the standard deviation of data in the Earth Observation Group monthly DNB composites by almost a factor of two. The code and datasets presented here are available under an open license by GFZ Data Services, and are implemented in the Radiance Light Trends web application.
description: Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1181
Something old and something new: CAD migration and archive accessioning at ADS
Creators: name: Field, Georgie
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
Material vs. structure: Topological origins of band-gap truncation resonances in periodic structures
Creators: name: Rosa, Matheus I. N.
name: Davis, Bruce L.
name: Liu, Liao
name: Ruzzene, Massimo
name: Hussein, Mahmoud I.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: While resonant modes do not exist within band gaps in infinite periodic materials, they may appear as in-gap localized edge modes once the material is truncated to form a finite periodic structure. Here, we provide an analysis framework that reveals the topological origins of truncation resonances, elucidating formally the conditions that influence their existence and properties. Elastic beams with sinusoidal and step-wise property modulations are considered as classical examples of periodic structures. Their non-trivial topological characteristics stem from the consideration of a phason parameter that produces spatial shifts of the property modulation while continuously varying how the boundaries are truncated. In this context, non-trivial band gaps are characterized by an integer topological invariant, the Chern number, which is equal to the number of truncation resonances that traverse a band gap as the phason is varied. We highlight the existence of multiple chiral edge states that may be localized at opposite boundaries, and illustrate how these can be independently tuned by modified boundary-specific phason parameters. Furthermore, we show that the frequency location of a truncation resonance is influenced by the modulation volume fraction, boundary conditions, and number of cells comprising the finite structure, thus quantifying its robustness to these factors. Non-topological in-gap resonances induced by a defect are also demonstrated, showing that these can be coupled with topological modes when the defect is located at an edge. Finally, experimental investigations on bi-material phononic-crystal beams are conducted to support these findings. The tunability of truncation resonances by material-property modulation may be exploited in applications ranging from vibration attenuation and thermal conductivity reduction to filtering and flow control by phononic subsurfaces.
Milky way halo objects, IC 4499 and the large magellanic cloud
Creators: name: Hankey, Warren
Publisher: name: University Of Tasmania
Year: 2023

description: The work described in this thesis is that of the candidate alone, except where otherwise acknowledged in the text. The observations of IC 4499 at the AAT were carried out by my supervisor Dr. Andrew A. Cole but the candidate was responsible for the reduction process and all subsequent analysis. The IC 4499 material in this thesis was published in the Monthly Notices of the Royal Astronom- ical Society, volume 411, pages 1536 to 1546, March 2011, with the candidate as first author and with Dr. Cole as co-author contributing part of the discussion. MNRAS hold the copyright for that content, and access to the material should be sought from the journal. The remaining non published content of the thesis may be made available for loan and limited copying and communication in accordance with the Copyright Act 1968. The Monte Carlo Markov Chain program to estimate the velocity dispersion and mass in IC 4499 was scripted in R by Dr. Simon Wotherspoon. The candidate substantially adapted the code and methodology to the larger problem of estimation of LMC rotation model parameters. LMC target selection, field plate setup, sky-fibre, and guide star placement were all carried out by the candidate, Dr. Cole travelled to the AAT to assist with the final LMC observations. Reduction and analysis of the LMC data is that of the candidate alone. Dr. Cole performed a calibration check of the LMC metallicity results and Appendix D is entirely his work. Thanks to Dr. Cole for encouragement, discussions and assistance. Observations at the Mount Pleasant radio telescope supporting the JAXA Selene Moon mission resulted in a co-author credit in Radio Science, volume 45, number 2, April 2010. Travel support for observing was provided by the Anglo-Australian Observatory (AAO). The AAO was funded by the British and Australian governments. Thanks to AAT support astronomer Dr. Rob Sharp and night assistant Winston Campbell for their assistance during the observing run.
title: Development of 3-D rift heterogeneity through fault network evolution
Creators: name: Naliboff, John B.
name: Glerum, Anne
name: Brune, Sascha
name: Péron-Pinvidic, G.
name: Wrona, Thilo
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 550 Geowissenschaften

description: Observations of rift and rifted margin architecture suggest that significant spatial and temporal structural heterogeneity develops during the multiphase evolution of continental rifting. Inheritance is often invoked to explain this heterogeneity, such as preexisting anisotropies in rock composition, rheology, and deformation. Here, we use high-resolution 3-D thermal-mechanical numerical models of continental extension to demonstrate that rift-parallel heterogeneity may develop solely through fault network evolution during the transition from distributed to localized deformation. In our models, the initial phase of distributed normal faulting is seeded through randomized initial strength perturbations in an otherwise laterally homogeneous lithosphere extending at a constant rate. Continued extension localizes deformation onto lithosphere-scale faults, which are laterally offset by tens of km and discontinuous along-strike. These results demonstrate that rift- and margin-parallel heterogeneity of large-scale fault patterns may in-part be a natural byproduct of fault network coalescence.
description: Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1183
The Bionic self : neural implants and threats to identity : implications for selfhood and social relations
Creators: name: Goddard, Eliza
Publisher: name: University Of Tasmania
Year: 2023

description: The key problem this thesis addresses is: What is the impact of neural implants, such as Deep Brain Stimulation or a Cochlear ear implant, on a person's personal identity? Put explicitly: What role do neural implants play in changes in self-understanding, agency and autonomy and what is the significance of these changes for philosophical and practical conceptions of personal identity? I explore the problem of the impacts of neural implants on personal identity through reference to first-personal accounts wherein patients or their family and significant others, express the claim that following the implantation they are no longer themselves or no longer the same person. I apply contemporary approaches to identity, agency and autonomy in moral psychology to argue that the sense of identity at issue in these claims is practical identity, and not metaphysical identity, and that the first-personal accounts reveal aspects of selfhood, raising concerns related to narrative agency and autonomy.
title: (Non-)exhaustivity in focus partitioning across languages
Creators: name: Zimmermann, Malte
name: De Veaugh-Geiss, Joseph P.
name: Tönnis, Swantje
name: Onea, Edgar
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 410 Linguistik

description: We present novel experimental evidence on the availability and the status of exhaustivity inferences with focus partitioning in German, English, and Hungarian. Results suggest that German and English focus-background clefts and Hungarian focus share important properties, (É. Kiss 1998, 1999; Szabolcsi 1994; Percus 1997; Onea & Beaver 2009). Those constructions are anaphoric devices triggering an existence presupposition. EXH-inferences are not obligatory in such constructions in English, German, or Hungarian, against some previous literature (Percus 1997; Büring & Križ 2013; É. Kiss 1998), but in line with pragmatic analyses of EXH-inferences in clefts (Horn 1981, 2016; Pollard & Yasavul 2016). The cross-linguistic differences in the distribution of EXH-inferences are attributed to properties of the Hungarian number marking system.
description: Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe; 724
title: The cancer of corruption and World Bank project performance: Is there a connection?
Creators: name: Feil, Hauke
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 330 Wirtschaft

description: Motivation: Corruption is often cited as a central reason why development projects fail. The article tests this claim by assessing whether World Bank projects perform worse in implementation environments with a higher corruption level. The article focuses specifically on bribery between public officials and firms during the procurement of needed goods and services. Approach and Methods: I use data from the World Bank's Enterprise Surveys to avoid the often-criticized corruption perception indices and to allow for an assessment of effects at the subnational level. The analysis builds on an assessment of the performance ratings of 1,228 World Bank projects and covers 87 different countries. Finding: Overall, the article finds a small but statistically significant correlation between the corruption level and project performance. This result indicates that the corruption level of recipient countries should be considered during the design and implementation of projects. Policy Implications: Nonetheless, the relatively small correlation and the low pseudo R-squareds advise not overestimating the relevance of corruption for project performance. At least for the project level, the article finds no indication that corruption is a primary obstacle to aid effectiveness.
description: Zweitveröffentlichungen der Universität Potsdam : Wirtschafts- und Sozialwissenschaftliche Reihe; 143
Recent Electroweak Results from the Tevatron
Creators: name: Zhu, Junjie
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: I present the recent electroweak measurements related to single W, Z boson and diboson productions from the CDF and D0 experiments at the Fermilab Tevatron collider.
description: On the behalf of CDF and D0 collaborations, proceeding for 10th Conference on the Intersections of Particle and Nuclear Physics
title: A taxonomy of treemap visualization techniques
Creators: name: Scheibel, Willy
name: Trapp, Matthias
name: Limberger, Daniel
name: Döllner, Jürgen
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 600 Technik, Technologie

description: A treemap is a visualization that has been specifically designed to facilitate the exploration of tree-structured data and, more general, hierarchically structured data. The family of visualization techniques that use a visual metaphor for parent-child relationships based “on the property of containment” (Johnson, 1993) is commonly referred to as treemaps. However, as the number of variations of treemaps grows, it becomes increasingly important to distinguish clearly between techniques and their specific characteristics. This paper proposes to discern between Space-filling Treemap TS, Containment Treemap TC, Implicit Edge Representation Tree TIE, and Mapped Tree TMT for classification of hierarchy visualization techniques and highlights their respective properties. This taxonomy is created as a hyponymy, i.e., its classes have an is-a relationship to one another: TS TC TIE TMT. With this proposal, we intend to stimulate a discussion on a more unambiguous classification of treemaps and, furthermore, broaden what is understood by the concept of treemap itself.
description: Zweitveröffentlichungen der Universität Potsdam : Reihe der Digital Engineering Fakultät; 008
title: Controlling image-stylization techniques using eye tracking
Creators: name: Söchting, Maximilian
name: Trapp, Matthias
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 600 Technik, Technologie

description: With the spread of smart phones capable of taking high-resolution photos and the development of high-speed mobile data infrastructure, digital visual media is becoming one of the most important forms of modern communication. With this development, however, also comes a devaluation of images as a media form with the focus becoming the frequency at which visual content is generated instead of the quality of the content. In this work, an interactive system using image-abstraction techniques and an eye tracking sensor is presented, which allows users to experience diverting and dynamic artworks that react to their eye movement. The underlying modular architecture enables a variety of different interaction techniques that share common design principles, making the interface as intuitive as possible. The resulting experience allows users to experience a game-like interaction in which they aim for a reward, the artwork, while being held under constraints, e.g., not blinking. The co nscious eye movements that are required by some interaction techniques hint an interesting, possible future extension for this work into the field of relaxation exercises and concentration training.
description: Zweitveröffentlichungen der Universität Potsdam : Reihe der Digital Engineering Fakultät; pde007
Lister Steps Carnegie Community Hub project
Creators: name: Steps, Lister
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
title: Entrepreneurial persistence beyond survival: Measurement and determinants
Creators: name: Caliendo, Marco
name: Goethner, Maximilian
name: Weißenberger, Martin
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 330 Wirtschaft

description: Entrepreneurial persistence is demonstrated by an entrepreneur’s continued positive maintenance of entrepreneurial motivation and constantly renewed active engagement in a new business venture despite counterforces or enticing alternatives. It thus is a crucial factor for entrepreneurs when pursuing and exploiting their business opportunities and in realizing potential economic gains and benefits. Using rich data on a representative sample of German business founders, we investigated the determinants of entrepreneurial persistence. Next to observed survival, we also constructed a hybrid persistence measure capturing the motivational dimension of persistence. We analyzed the influence of individual-level (human capital and personality) and business-related characteristics on both measures as well as their relative importance. We found that the two indicators emphasize different aspects of persistence. For the survival indicator, the predictive power was concentrated in business characteristics and human capital, while for hybrid persistence the dominant factors were business characteristics and personality. Finally, we showed that results were heterogeneous across subgroups. In particular, formerly unemployed founders did not differ in survival chances, but they were more likely to lack a high psychological commitment to their business ventures.
description: Zweitveröffentlichungen der Universität Potsdam : Wirtschafts- und Sozialwissenschaftliche Reihe; 144
Long-Term Returns Estimation of Leveraged Indexes and ETFs
Creators: name: Brown, Hayden
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Finance (q-fin.MF)
subject: FOS: Economics and business

description: Daily leveraged exchange traded funds amplify gains and losses of their underlying benchmark indexes on a daily basis. The result of going long in a daily leveraged ETF for more than one day is less clear. Here, bounds are given for the log-returns of a leveraged ETF when going long for more than just one day. The bounds are quadratic in the daily log-returns of the underlying benchmark index, and they are used to find sufficient conditions for outperformance and underperformance of a leveraged ETF in relation to its underlying benchmark index. Results show that if the underlying benchmark index drops 10+\% over the course of 63 consecutive trading days, and the standard deviation of the benchmark index's daily log-returns is no more than .015, then going long in a -3x leveraged ETF during that period gives a log-return of at least 1.5 times the log-return of a short position in the underlying benchmark index. Results also show promise for a 2x daily leveraged S&P 500 ETF. If the average annual log-return of the S&P 500 index continues to be at least .0658, as it has been in the past, and the standard deviation of daily S&P 500 log-returns is under .0125, then a 2x daily leveraged S&P 500 ETF will perform at least as well as the S&P 500 index in the long-run.
description: 23 pages, 9 figures
Julien Dez, hyperbaric logistician at Inrap
Creators: name: Weber, Elsa
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
Day of Archaeology blog a view from rural Yorkshire
Creators: name: Hopwood-Lewis, Kat
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.brThe project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.brThe first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
Emmanuelle Bryas, responsible for the management if scientific holdings at Inrap
Creators: name: Weber, Elsa
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
title: Changes in the composition of marine and sea-ice diatoms derived from sedimentary ancient DNA of the eastern Fram Strait over the past 30 000 years
Creators: name: Zimmermann, Heike H.
name: Stoof-Leichsenring, Kathleen R.
name: Kruse, Stefan
name: Müller, Juliane
name: Stein, Ruediger
name: Tiedemann, Ralf
name: Herzschuh, Ulrike
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 550 Geowissenschaften

description: The Fram Strait is an area with a relatively low and irregular distribution of diatom microfossils in surface sediments, and thus microfossil records are scarce, rarely exceed the Holocene, and contain sparse information about past richness and taxonomic composition. These attributes make the Fram Strait an ideal study site to test the utility of sedimentary ancient DNA (sedaDNA) metabarcoding. Amplifying a short, partial rbcL marker from samples of sediment core MSM05/5-712-2 resulted in 95.7 % of our sequences being assigned to diatoms across 18 different families, with 38.6 % of them being resolved to species and 25.8 % to genus level. Independent replicates show a high similarity of PCR products, especially in the oldest samples. Diatom sedaDNA richness is highest in the Late Weichselian and lowest in Mid- and Late Holocene samples. Taxonomic composition is dominated by cold-water and sea-ice-associated diatoms and suggests several reorganisations – after the Last Glacial Maximum, after the Younger Dryas, and after the Early and after the Mid-Holocene. Different sequences assigned to, amongst others, Chaetoceros socialis indicate the detectability of intra-specific diversity using sedaDNA. We detect no clear pattern between our diatom sedaDNA record and the previously published IP25 record of this core, although proportions of pennate diatoms increase with higher IP25 concentrations and proportions of Nitzschia cf. frigida exceeding 2 % of the assemblage point towards past sea-ice presence.
description: Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1195
Occupational Hazards and Health Challenges in Bricklaying: An Analysis
Creators: name: Laura, Henderson
name: Samuel, Thompson
Publisher: name: AYDEN JOURNAL
Year: 2024
Subjects: Bricklaying, Hazards, Health challenges, Occupation

description: In a developing country like Nigeria, construction industries plays an important role and bricklayers are mostly involved in this sector. A significant number of individuals are directly involved in this sector too, and the number is growing at a fast rate in the cities. Due to several occupation health risks, this sector is placed top of the list according to workplace accidents and injuries. Moreover, socioeconomically poor people, particularly from rural areas, are engaged in this sector. Research on occupational health in this occupation is highly needed to give safety and awareness to the bricklaying workers. This work is a review of researches from the available published articles to identify a spectrum of occupational health problems of bricklayers. This profession is associated with a lot of hazards. The research on occupational health hazard of this research may create more awareness to these bricklayers on the risks associated with their professions, and ways to promote safety. Amongst health challenges associated with the profession. The definition of term are dis cuss while the objectives of this article will be discuss under the following sub-heading – identifying different types of hazards among bricklayers, enumerate types of hazards, list the risk factors to hazard among bricklayers and possible harmful effect, mention health challenges associated with bricklaying, identify possible preventive measure. Methodology and review of related articles base on objectives of the paper, observation, discuss of the observations based on different facts retrieved from different author.
title: Resumption in the production of focused constructions in Akan speakers with agrammatism
Creators: name: Lartey, Nathaniel
name: Tsiwah, Frank
name: Amponsah, Clement
name: Martinez-Ferreiro, Silvia
name: Bastiaanse, Roelien
Publisher: name: Universität Potsdam
Year: 2021
Subjects: subject: 410 Linguistik

description: Background: The distribution of pronouns varies cross-linguistically. This distribution has led to conflicting results in studies that investigated pronoun resolution in agrammatic indviduals. In the investigation of pronominal resolution, the linguistic phenomenon of "resumption" is understudied in agrammatism. The construction of pronominal resolution in Akan presents the opportunity to thoroughly examine resumption. Aims: To start, the present study examines the production of (pronominal) resumption in Akan focus constructions (who-questions and focused declaratives). Second, we explore the effect of grammatical tone on the processing of pronominal (resumption) since Akan is a tonal language. Methods & Procedures: First, we tested the ability to distinguish linguistic and non-linguistic tone in Akan agrammatic speakers. Then, we administered an elicitation task to five Akan agrammatic individuals, controlling for the structural variations in the realization of resumption: focused who-questions and declaratives with (i) only a resumptive pronoun, (ii) only a clause determiner, (iii) a resumptive pronoun and a clause determiner co-occurring, and (iv) neither a resumptive pronoun nor a clause determiner. Outcomes & Results: Tone discrimination .both for pitch and for lexical tone was unimpaired. The production task demonstrated that the production of resumptive pronouns and clause determiners was intact. However, the production of declarative sentences in derived word order was impaired; wh-object questions were relatively well-preserved. Conclusions: We argue that the problems with sentence production are highly selective: linguistic tones and resumption are intact but word order is impaired in non-canonical declarative sentences.
description: Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe; 726
On electromagnetic instabilities at ultra-relativistic shock waves
Creators: name: Lemoine, Martin
name: Pelletier, Guy
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: (Abridged) This paper addresses the issue of magnetic field generation in a relativistic shock precursor through micro-instabilities. The level of magnetization of the upstream plasma turns out to be a crucial parameter, notably because the length scale of the shock precursor is limited by the Larmor rotation of the accelerated particles in the background magnetic field and by the speed of the shock wave. We discuss in detail and calculate the growth rates of the following beam plasma instabilities seeded by the accelerated and reflected particle populations: for an unmagnetized shock, the Weibel and filamentation instabilities, as well as the Cerenkov resonant longitudinal and oblique modes; for a magnetized shock, the Weibel instability and the resonant Cerenkov instabilities with the longitudinal electrostatic modes, as well as the Alfven, Whisler and extraordinary modes. All these instabilities are generated upstream, then they are transmitted downstream. The modes excited by Cerenkov resonant instabilities take on particular importance with respect to the magnetisation of the downstream medium since, being plasma eigenmodes, they have a longer lifetime than the Weibel modes. We discuss the main limitation of the wave growth associated with the length of the precursor and the magnetisation of the upstream medium for both oblique and parallel shock waves. We also characterize the proper conditions to obtain Fermi acceleration. We recover some results of most recent particle-in-cell simulations and conclude with some applications to astrophysical cases of interest, pulsar winds and gamma-ray burst external shock waves in particular. (Abridged)
description: 14 pages, 2 figures; v2: enlarged discussion on the limitations of the growths of instabilities for oblique and parallel relativistic shock waves, typos corrected
Public archaeology at Uffizi Gallery, Florence
Creators: name: Barandoni, Cristiana
Publisher: name: Archaeology Data Service
Year: 2015

description: This resource is a single blog post created as part of the Day of Archaeology initiative. The Day of Archaeology project aimed to provide a window into the daily lives of archaeologists from all over the world. The project asked people working, studying or volunteering in the archaeological world to participate in a 'Day of Archaeology' each year by recording their day and sharing it through text, images or video on the Day of Archaeology blog.
The project asked anyone with a personal, professional or voluntary interest in archaeology to get involved, and help highlight the reasons why archaeology is vital to protect the past and inform our futures. The resulting Day of Archaeology project archive demonstrates the wide variety of work the archaeological profession undertakes day-to-day across the globe, and helps to raise public awareness of the relevance and importance of archaeology to the modern world.
The first ever Day of Archaeology was held in 2011 and, since then, the project had thousands of archaeologists take part in the event, from those working in the field through to specialists working in laboratories and behind computers. The last Day of Archaeology was on Friday 28th July 2017.
Classical and Quantum Elliptical Billiards: Mixed Phase Space and Short Correlations in Singlets and Doublets
Creators: name: Lima, T. Araújo
name: Carmo, R. B. do
Publisher: name: arXiv
Year: 2023
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Billiards are flat cavities where a particle is free to move between elastic collisions with the boundary. In chaos theory these systems are simple prototypes, their conservative dynamics of a billiard may vary from regular to chaotic, depending only on the border. The results reported here seek to shed light on the quantization of classically chaotic systems. We present numerical results on classical and quantum properties in two bi-parametric families of Billiards, Elliptical Stadium Billiard (ESB) and Elliptical-$C_3$ Billiards (E-$C_3$B). Both are elliptical perturbations of chaotic billiards with originally circular sectors on their borders. Our numerical calculations show evidence that the elliptical families can present a mixed classical phase space, identified by a parameter $ρ_\text{c} < 1$, which we use to guide our analysis of quantum spectra. We explored the short correlations through nearest neighbor spacing distribution $p(s)$, which showed that in the mixed region of the classical phase space, $p(s)$ is well described by the Berry-Robnik-Brody (BRB) distributions for the ESB. In agreement with the expected from the so-called ergodic parameter $α= t_\text{H}/t_\text{T}$, the ratio between the Heisenberg time and the classical diffusive-like transport time signals the possibility of quantum dynamical localization when $α< 1$. For the E-$C_3$B family, the eigenstates can be split into singlets and doublets. BRB describes $p(s)$ for singlets as the previous family in the mixed region. However, the $p(s)$ for doublets are described by new distributions recently introduced in the literature but only tested in a few cases for $ρ_\text{c} < 1$. We observed that as $ρ_\text{c}$ decreases, the $p(s)$'s tend to move away simultaneously from the GOE (singlets) and GUE (doublets) distributions.
description: 9 pages, 8 figures