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Search Results: 1 - 10 of 302798 matches for " Alan J. Hamlet "
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Robotic Behavior Prediction Using Hidden Markov Models
Alan J. Hamlet,Carl D. Crane
Computer Science , 2014,
Abstract: There are many situations in which it would be beneficial for a robot to have predictive abilities similar to those of rational humans. Some of these situations include collaborative robots, robots in adversarial situations, and for dynamic obstacle avoidance. This paper presents an approach to modeling behaviors of dynamic agents in order to empower robots with the ability to predict the agent's actions and identify the behavior the agent is executing in real time. The method of behavior modeling implemented uses hidden Markov models (HMMs) to model the unobservable states of the dynamic agents. The background and theory of the behavior modeling is presented. Experimental results of realistic simulations of a robot predicting the behaviors and actions of a dynamic agent in a static environment are presented.
Joint Belief and Intent Prediction for Collision Avoidance in Autonomous Vehicles
Alan J. Hamlet,Carl D. Crane
Computer Science , 2015,
Abstract: This paper describes a novel method for allowing an autonomous ground vehicle to predict the intent of other agents in an urban environment. This method, termed the cognitive driving framework, models both the intent and the potentially false beliefs of an obstacle vehicle. By modeling the relationships between these variables as a dynamic Bayesian network, filtering can be performed to calculate the intent of the obstacle vehicle as well as its belief about the environment. This joint knowledge can be exploited to plan safer and more efficient trajectories when navigating in an urban environment. Simulation results are presented that demonstrate the ability of the proposed method to calculate the intent of obstacle vehicles as an autonomous vehicle navigates a road intersection such that preventative maneuvers can be taken to avoid imminent collisions.
Modeling of Circuits with Strongly Temperature Dependent Thermal Conductivities for Cryogenic CMOS
J. Hamlet,K. Eng,T. Gurrieri,J. Levy,M. Carroll
Physics , 2010,
Abstract: When designing and studying circuits operating at cryogenic temperatures understanding local heating within the circuits is critical due to the temperature dependence of transistor and noise behavior. We have investigated local heating effects of a CMOS ring oscillator and current comparator at T=4.2K. In two cases, the temperature near the circuit was measured with an integrated thermometer. A lumped element equivalent electrical circuit SPICE model that accounts for the strongly temperature dependent thermal conductivities and special 4.2K heat sinking considerations was developed. The temperature dependence on power is solved numerically with a SPICE package, and the results are within 20% of the measured values for local heating ranging from <1K to over 100K.
Tight holomorphic maps, a classification
Oskar Hamlet
Mathematics , 2011,
Abstract: We classify all tight holomorphic maps between Hermitian symmetric spaces of non-compact type.
Tight maps and holomorphicity
Oskar Hamlet
Mathematics , 2012,
Abstract: Tight maps was introduced along tight homomorphisms by Burger, Iozzi and Wienhard with aims towards maximal representations. In this paper we classify tight maps into classical Hermitian symmetric spaces and give a partial result for the exceptional spaces.
Acordes arrítmicos del color de la piel del bailarín de la Escuela Cubana de Ballet
Betancourt León, Hamlet;
Cuicuilco , 2009,
Abstract: the color of the skin is a class within the systemic model of the body of the cuban ballet dancer. many cubans, who are not dancers, consider the color of the skin like one of the main characteristics to be taken in account to enter and to successfully remain in the ballet field. the objective of this research paper is to determine the impact of the skin color in the appreciation of the scenic body beauty of the ballet dancer within the cuban field. the empirical evidences, over which the thesis and interpretations stand, arise from a five year long period of ethnographical fieldwork among the main institutions of the cuban ballet field. the color of the skin integrates hierarchically the evaluation of the scenic corporal beauty of the cuban dancer realized by a sector of the social field and no other considers it. the kind of skin color discrimination was expressed by depreciating the scenic body beauty of black and brown dancers of cuban field compared to the white skin dancers. the facts pointed out frequently practices of kind of skin color discrimination at the professional area than for student system in the social field.
Assessing water resources adaptive capacity to climate change impacts in the Pacific Northwest Region of North America
A. F. Hamlet
Hydrology and Earth System Sciences (HESS) & Discussions (HESSD) , 2011,
Abstract: Climate change impacts in Pacific Northwest Region of North America (PNW) are projected to include increasing temperatures and changes in the seasonality of precipitation (increasing precipitation in winter, decreasing precipitation in summer). Changes in precipitation are also spatially varying, with the northwestern parts of the region generally experiencing greater increases in cool season precipitation than the southeastern parts. These changes in climate are projected to cause loss of snowpack and associated streamflow timing shifts which will increase cool season (October–March) flows and decrease warm season (April–September) flows and water availability. Hydrologic extremes such as the 100 yr flood and extreme low flows are also expected to change, although these impacts are not spatially homogeneous and vary with mid-winter temperatures and other factors. These changes have important implications for natural ecosystems affected by water, and for human systems. The PNW is endowed with extensive water resources infrastructure and well-established and well-funded management agencies responsible for ensuring that water resources objectives (such as water supply, water quality, flood control, hydropower production, environmental services, etc.) are met. Likewise, access to observed hydrological, meteorological, and climatic data and forecasts is in general exceptionally good in the United States and Canada, and is often supported by federally funded programs that ensure that these resources are freely available to water resources practitioners, policy makers, and the general public. Access to these extensive resources support the argument that at a technical level the PNW has high capacity to deal with the potential impacts of natural climate variability on water resources. To the extent that climate change will manifest itself as moderate changes in variability or extremes, we argue that existing water resources infrastructure and institutional arrangements provide a reasonably solid foundation for coping with climate change impacts, and that the mandates of existing water resources policy and water resources management institutions are at least consistent with the fundamental objectives of climate change adaptation. A deeper inquiry into the underlying nature of PNW water resources systems, however, reveals significant and persistent obstacles to climate change adaptation, which will need to be overcome if effective use of the region's extensive water resources management capacity can be brought to bear on this problem. Primary obstacles include assumptions of stationarity as the fundamental basis of water resources system design, entrenched use of historical records as the sole basis for planning, problems related to the relatively short time scale of planning, lack of familiarity with climate science and models, downscaling procedures, and hydrologic models, limited access to climate change scenarios and hydrologic products for specific w
Assessing water resources adaptive capacity to climate change impacts in the Pacific Northwest Region of North America
A. F. Hamlet
Hydrology and Earth System Sciences Discussions , 2010, DOI: 10.5194/hessd-7-4437-2010
Abstract: Climate change impacts in Pacific Northwest Region of North America (PNW) are projected to include increasing temperatures and changes in the seasonality of precipitation (increasing precipitation in winter, decreasing precipitation in summer). Changes in precipitation are also spatially varying, with the northwestern parts of the region generally experiencing greater increases in cool season precipitation than the southeastern parts. These changes in climate are projected to cause loss of snowpack and associated streamflow timing shifts which will increase cool season (October–March) flows and decrease warm season (April–September) flows and water availability. Hydrologic extremes such as the 100 year flood and extreme low flows are also expected to change, although these impacts are not spatially homogeneous and vary with mid-winter temperatures and other factors. These changes have important implications for natural ecosystems affected by water, and for human systems. The PNW is endowed with extensive water resources infrastructure and well-established and well-funded management agencies responsible for ensuring that water resources objectives (such as water supply, water quality, flood control, hydropower production, environmental services, etc.) are met. Likewise, access to observed hydrological, meteorological, and climatic data and forecasts is in general exceptionally good in the United States and Canada, and access to these products and services is often supported by federally funded programs that ensure that these resources are available to water resources practitioners, policy makers, and the general public. Access to these extensive resources support the argument that at a technical level the PNW has high capacity to deal with the potential impacts of natural climate variability on water resources. To the extent that climate change will manifest itself as moderate changes in variability or extremes, we argue that existing water resources infrastructure and institutional arrangements provide a solid foundation for coping with climate change impacts, and that the mandates of existing water resources policy and water resources management institutions are at least consistent with the fundamental objectives of climate change adaptation. A deeper inquiry into the underlying nature of PNW water resources systems, however, reveals significant and persistent obstacles to climate change adaptation, which will need to be overcome if effective use of the region's extensive water resources management capacity can be brought to bear on this problem. Primar
Tight maps and holomorphicity, exceptional spaces
Oskar Hamlet,Takayuki Okuda
Mathematics , 2014,
Abstract: We show that there are no tight nonholomorphic maps from irreducible domains into exceptional codomains, the only exception being the already known tight nonholomorphic maps from the Poincare disc. This follows up on previous work by the first author where this was shown for classical codomains.
La construcción de los conocimientos psicoterapéuticos durante la práctica profesional del psicólogo
López García,Hamlet;
Humanidades M??dicas , 2009,
Abstract: this article presents a qualitative research within the framework of the social studies of science. this research aims to describe how psychotherapeutic knowledge is constructed. thus, six experienced specialists were interviewed. results confirm the construction of psychotherapeutic knowledge through a constant process of reflection and elaboration of professional practice, in a continuously critical dialogue using theoretical and practical references permanently updated by practice. although being particular, these results provide valuable suggestions about the formation of psychotherapists.
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