33,518 research outputs found
Issa Marcue con periodistas en una estudio fotográfico, retrato de grupo.
No full textAntonio Escobedo. Literato. Issa Marcue. Bailarina. Bernardo Ortiz de M. Escritor
Issa Marcue con periodistas en una estudio fotográfico, retrato de grupo.
No full textAntonio Escobedo. Literato. Issa Marcue. Bailarina. Bernardo Ortiz de M. Escritor
Issa Marcue con periodistas en una estudio fotográfico, retrato de grupo.
No full textAntonio Escobedo. Literato. Issa Marcue. Bailarina. Bernardo Ortiz de M. Escritor
Issa Marcue con periodistas en una estudio fotográfico, retrato de grupo.
No full textAntonio Escobedo. Literato. Issa Marcue. Bailarina. Bernardo Ortiz de M. Escritor
The International Skin Spectra Archive (ISSA): a multicultural human skin phenotype and colour spectra collection
No full textThis paper presents the International Skin Spectra Archive (ISSA), a multicultural human skin phenotype dataset, containing 15,256 records of both spectral and colorimetric data derived from 2,113 subjects. These measurements, collected between 2012 and 2024, come from eleven different datasets gathered by international laboratories across eight countries, all adhering to a uniform measurement protocol to ensure data consistency. The ISSA dataset addresses the inherent challenges in measuring human skin colour due to its complex structure and covers a wide variability in skin characteristics such as geography, ethnicity, age, gender, and body location. Providing a broad spectrum of human skin data, the ISSA dataset will advance our understanding of skin colour variations and their biological, cultural, and environmental influences. It will also serve as a crucial resource for scientific research and technological development across various fields where diverse and precise spectral and colour data of real human skin are essential
Control of transient power during unintentional islanding of microgrids
No full textIn inverter-based microgrids, the paralleled inverters need to work in grid-connected mode and stand-alone mode and to transfer seamlessly between the two modes. In grid-connected mode, the inverters control the amount of power injected into the grid. In stand-alone mode, however, the inverters control the island voltage while the output power is dictated by the load. This can be achieved using the droop control. Inverters can have different power set-points during grid-connected mode but in stand-alone mode they all need their power set-points to be adjusted according to their power ratings. However, during sudden unintentional islanding (due to loss of mains), transient power can flow from inverters with high power setpoints to inverters with low power set-points, which can raise the DC link voltage of the inverters causing them to shut down. This paper investigates the transient circulating power between paralleled inverters during unintentional islanding and proposes a controller to limit it. The controller monitors the DC link voltage and adjusts the power set-point in proportion to the rise in the voltage. A small signal model of an islanded microgrid is developed and used to design the controller. Simulation and experimental results are presented to validate the design
Extracting stay regions with uncertain boundaries from GPS trajectories: a case study in animal ecology.
No full textIn this paper we present a time-aware, density-based clustering technique for the identi cation of stay regions in trajectories of low-sampling-rate GPS points, and its application to the study of animal migrations. A stay region is de ned as a portion of space which generally does not designate a precise geographical entity and where an object is signi cantly present for a period of time, in spite of relatively short periods of absence. Stay regions can delimit for example the
residence of animals, i.e. the home-range. The proposed technique enables the extraction of stay regions represented by dense and temporally disjoint sub-trajectories, through the speci cation of a small set of parameters related to density and presence. While this work takes inspiration from the eld of animal ecology, we argue that the approach can be of more general concern and used in perspective in different domains, e.g. the study of human mobility over large
temporal scales. We experiment with the approach on a case study, regarding the seasonal migration of a group of roe deer
Introduction: Social security and the challenge of demographic change
No full textFrom 29 November to 4 December 2010, the International Social Security Association (ISSA) will meet in Cape Town, Republic of South Africa, to mark the event of the ISSA World Social Security Forum. The Forum provides a unique opportunity for decision-makers from all regions to share knowledge, recognize good practices and discuss key policy challenges as these relate to the design and delivery of national social security programmes. One key policy challenge identified by the ISSA's worldwide membership is demographic change. For this important reason, among the events planned for the Cape Town Forum, a plenary will focus specifically on demography. To coincide with the preparations for the World Forum, and to complement the wider and longer-term endeavours of the ISSA to promote knowledge sharing, the International Social Security Review has chosen to produce this double special issue on "Social security and the challenge of demographic change". The expectation is that this set of papers will make a contribution to supporting social security policy-makers, practitioners, analysts and researchers in all countries as they work towards developing and implementing tailored policy responses to the multifaceted challenge of demographic change.social security, demographic change, demography, policy
Landsat MSS classification of fire fuel types in Wood Buffalo National Park, northern Canada
No full textJ1: Global Ecology & Biogeography Letters; M3: Article; Milne, David Franklin, Steven E. Wilson, Bradley A. Ghitter, Geoff Heathcott, Mark McCaffrey, Thomas M. Ow, Charlotte F. Y.; Source Information: Mar1994, Vol. 4 Issue 2, p33; Subject Term: FOREST fires; Author-Supplied Keyword: Canada (Wood Buffalo National Park); Author-Supplied Keyword: Forest fire; Author-Supplied Keyword: Fuel type classification; Author-Supplied Keyword: Landsat data; Number of Pages: 0p; Document Type: Articl
Private investment in guinea, does macro-instability matter? A comparative analysis
No full textThis paper examines empirically the link between macro-instability and private investment rate in Guinea, in comparison with WAEMU countries . Notwithstanding the caution imposed by data and methodological limitations in interpreting the results, the paper shows that macroeconomic instability is, in general, higher in Guinea than WAEMU countries. Consequently, macroeconomic uncertainties are cause of concern. Using a panel data approach, the findings suggest that the negative effects of relative price volatility (mainly inflation, real effective exchange rates) expected in theory, do not occur when small deviations are combined with competitiveness, resulting from a declining real effective exchange rate. In addition, the positive effect of foreign exchange reserves on the private investment rate supports the view that the availability of foreign exchange reserves is critical in a fixed exchange rate regime as that of WAEMU, as well as in an imperfect floating exchange rate regime as that of Guinea. While the panel data approach shows no evidence of negative impact of macroeconomic uncertainties, it suggests further analysis to explore the robustness of this result. A time series approach is carried out for Guinea, with regard to this purpose. As mentioned above, Guinea registers higher level of macroeconomic instability, compared to WAEMU countries. Using a single error correction model, the counter-intuitive impact of macroeconomic instability variables (measured by the real effective exchange rate, inflation rate and the terms of trade) persists. Given the dominant share of the mining sector in the private investment figures, the findings may be misleading as this sector may be protected from the wrong market signals resulting from the increasing macro-instability. However, capturing such an ‘enclave-effect’ is unfortunately limited by the lack of disaggregated investment data by sector. Finally, the results indicate a negative (indirect) impact of macroeconomic instability (measured by the real lending rate and the flow of credit to the economy) on the private sector investment. They suggest additional efforts to improve the overall macroeconomic context and especially, an in-depth openness of the financial sector, to diversify credit instruments to the private sector in Guinea.Guinea, Macro-instability, Inflation, Private investment
- …
