EgHy EgHy - Academia.edu (original) (raw)
Papers by EgHy EgHy
Computing Research Repository, 2008
This paper characterizes geometrically the singularities of limited-DOF parallel manipulators. Th... more This paper characterizes geometrically the singularities of limited-DOF parallel manipulators. The geometric conditions associated with the dependency of six Plücker vector of lines (finite and infinite) constituting the rows of the inverse Jacobian matrix are formulated using Grassmann–Cayley algebra. Manipulators under consideration do not need to have a passive spherical joint somewhere in each leg. This study is illustrated with three example robots.
European Journal of Inorganic Chemistry, 1869
Nature, 1937
SEVERAL workers, notably Eghis, Rasumov and Dolgu&sbrevein, claim to have demonstrated a photo-pe... more SEVERAL workers, notably Eghis, Rasumov and Dolgu&sbrevein, claim to have demonstrated a photo-periodic after-effect with short-day plants, that is, an acceleration of flowering in such plants exposed to short days during the early stages of growth and afterwards grown in long days. This work has been done mainly on cereals and fodder plants, and so far as we are aware the existence of such an after-effect has not been demonstrated with any ornamental flowering plants.
Discrete & Computational Geometry, 1989
We show that, under reasonable assumptions, any collision-avoiding motion-planning problem for a ... more We show that, under reasonable assumptions, any collision-avoiding motion-planning problem for a moving system with two degrees of freedom can be solved in timeO(λ s (n) log2n), wheren is the number of collision constraints imposed on the system,s is a fixed parameter depending, e.g., on the maximum algebraic degree of these constraints, andλ s (n) is the (almost linear) maximum length of (n, s) Davenport-Schinzel sequences. This follows from an upper bound ofO(λ s (n)) that we establish for the combinatorial complexity of a single connected component of the space of all free placements of the moving system. Although our study is motivated by motion planning, it is actually a study of topological, combinatorial, and algorithmic issues involving a single face in an arrangement of curves. Our results thus extend beyond the area of motion planning, and have applications in many other areas.
In this paper, we propose a reduced complexity interference canceler for a Turbo Space-Time Codes... more In this paper, we propose a reduced complexity interference canceler for a Turbo Space-Time Codes (TSTC) receiver. Actually, the TSTC receiver is based on a linear Minimum Mean Squared Error (MMSE) filter inside an Interference Canceler (IC) loop. In this scheme, considering the matrix inversion cost, the overall complexity remains important for a large number of transmit and receive antennas. In the proposed receiver, we integrate the Generalized Minimum residual method (GMRES) for symbol detection to compute the MMSE filter without matrix inversion. A good tradeoff between performances and complexity is thus achieved for a system with a large number of transmit and receive antennas. The bit error ratio (BER) and the complexity are evaluated with respect to the number of iterations of the GMRES and the number of transmit/receive antennas. A comparison with the existent IC-MMSE is presented and discussed at the end of the paper.
European Journal of Organic Chemistry, 1870
European Journal of Inorganic Chemistry, 1871
European Journal of Endocrinology, 2006
Objective: Adiponutrin is a new transmembrane protein specifically expressed in adipose tissue. I... more Objective: Adiponutrin is a new transmembrane protein specifically expressed in adipose tissue. In obese subjects, short-or long-term calorie restriction diets were associated with a reduction in adiponutrin gene expression. Adiponut.rin mRNA level was previously shown to be negatively correlated with fasting glucose plasma levels and associated with insulin sensitivity of non-diabetic obese and nonobese subjects. The purpose of the present work was to get more insight into the regulation of adiponutrin gene expression by insulin and/or glucose using clamp studies and to examine its potential dysregulation in subjects with a deterioration of glucose homeostasis. Methods: Adiponutrin gene expression was quantified by reverse transcriptase-quantitative PCR in s.c. adipose tissue of healthy lean subjects after an euglycemic hyperinsulinemic clamp (EGHI), a hyperglycemic euinsulinemic clamp, and a hyperglycemic hyperinsulinemic (HGHI) clamp. Adiponutrin gene expression was also analyzed in patients with different levels of insulin resistance. Results: During EGHI, insulin infusion induced adiponutrin gene expression 8.4-fold (PZ0.008). Its expression was also induced by glucose infusion, although to a lesser extend (2.2-fold, PZ0.03). Infusion of both insulin and glucose (HGHI) had an additive effect on the adiponutrin expression (tenfold, PZ0.008). In a pathological context, adiponutrin gene was highly expressed in the adipose tissue of type-1 diabetic patients with chronic hyperglycemia compared with healthy subjects. Conversely, adiponutrin gene expression was significantly reduced in type-2 diabetics (PZ0.01), but remained moderately regulated in these patients after the EGHI clamp (2.5-fold increased). Conclusion: These results suggest a strong relationship between adiponutrin expression, insulin sensitivity, and glucose metabolism in human adipose tissue.
Computing Research Repository, 2008
This paper characterizes geometrically the singularities of limited-DOF parallel manipulators. Th... more This paper characterizes geometrically the singularities of limited-DOF parallel manipulators. The geometric conditions associated with the dependency of six Plücker vector of lines (finite and infinite) constituting the rows of the inverse Jacobian matrix are formulated using Grassmann–Cayley algebra. Manipulators under consideration do not need to have a passive spherical joint somewhere in each leg. This study is illustrated with three example robots.
European Journal of Inorganic Chemistry, 1869
Nature, 1937
SEVERAL workers, notably Eghis, Rasumov and Dolgu&sbrevein, claim to have demonstrated a photo-pe... more SEVERAL workers, notably Eghis, Rasumov and Dolgu&sbrevein, claim to have demonstrated a photo-periodic after-effect with short-day plants, that is, an acceleration of flowering in such plants exposed to short days during the early stages of growth and afterwards grown in long days. This work has been done mainly on cereals and fodder plants, and so far as we are aware the existence of such an after-effect has not been demonstrated with any ornamental flowering plants.
Discrete & Computational Geometry, 1989
We show that, under reasonable assumptions, any collision-avoiding motion-planning problem for a ... more We show that, under reasonable assumptions, any collision-avoiding motion-planning problem for a moving system with two degrees of freedom can be solved in timeO(λ s (n) log2n), wheren is the number of collision constraints imposed on the system,s is a fixed parameter depending, e.g., on the maximum algebraic degree of these constraints, andλ s (n) is the (almost linear) maximum length of (n, s) Davenport-Schinzel sequences. This follows from an upper bound ofO(λ s (n)) that we establish for the combinatorial complexity of a single connected component of the space of all free placements of the moving system. Although our study is motivated by motion planning, it is actually a study of topological, combinatorial, and algorithmic issues involving a single face in an arrangement of curves. Our results thus extend beyond the area of motion planning, and have applications in many other areas.
In this paper, we propose a reduced complexity interference canceler for a Turbo Space-Time Codes... more In this paper, we propose a reduced complexity interference canceler for a Turbo Space-Time Codes (TSTC) receiver. Actually, the TSTC receiver is based on a linear Minimum Mean Squared Error (MMSE) filter inside an Interference Canceler (IC) loop. In this scheme, considering the matrix inversion cost, the overall complexity remains important for a large number of transmit and receive antennas. In the proposed receiver, we integrate the Generalized Minimum residual method (GMRES) for symbol detection to compute the MMSE filter without matrix inversion. A good tradeoff between performances and complexity is thus achieved for a system with a large number of transmit and receive antennas. The bit error ratio (BER) and the complexity are evaluated with respect to the number of iterations of the GMRES and the number of transmit/receive antennas. A comparison with the existent IC-MMSE is presented and discussed at the end of the paper.
European Journal of Organic Chemistry, 1870
European Journal of Inorganic Chemistry, 1871
European Journal of Endocrinology, 2006
Objective: Adiponutrin is a new transmembrane protein specifically expressed in adipose tissue. I... more Objective: Adiponutrin is a new transmembrane protein specifically expressed in adipose tissue. In obese subjects, short-or long-term calorie restriction diets were associated with a reduction in adiponutrin gene expression. Adiponut.rin mRNA level was previously shown to be negatively correlated with fasting glucose plasma levels and associated with insulin sensitivity of non-diabetic obese and nonobese subjects. The purpose of the present work was to get more insight into the regulation of adiponutrin gene expression by insulin and/or glucose using clamp studies and to examine its potential dysregulation in subjects with a deterioration of glucose homeostasis. Methods: Adiponutrin gene expression was quantified by reverse transcriptase-quantitative PCR in s.c. adipose tissue of healthy lean subjects after an euglycemic hyperinsulinemic clamp (EGHI), a hyperglycemic euinsulinemic clamp, and a hyperglycemic hyperinsulinemic (HGHI) clamp. Adiponutrin gene expression was also analyzed in patients with different levels of insulin resistance. Results: During EGHI, insulin infusion induced adiponutrin gene expression 8.4-fold (PZ0.008). Its expression was also induced by glucose infusion, although to a lesser extend (2.2-fold, PZ0.03). Infusion of both insulin and glucose (HGHI) had an additive effect on the adiponutrin expression (tenfold, PZ0.008). In a pathological context, adiponutrin gene was highly expressed in the adipose tissue of type-1 diabetic patients with chronic hyperglycemia compared with healthy subjects. Conversely, adiponutrin gene expression was significantly reduced in type-2 diabetics (PZ0.01), but remained moderately regulated in these patients after the EGHI clamp (2.5-fold increased). Conclusion: These results suggest a strong relationship between adiponutrin expression, insulin sensitivity, and glucose metabolism in human adipose tissue.