We determined the value of diagnostic and therapeutic approaches of false penile fractures and th... more We determined the value of diagnostic and therapeutic approaches of false penile fractures and the outcome of treatment. We retrospectively reviewed 16 cases of presumed penile fracture with a negative surgical exploration. Clinical presentation, technique of treatment and outcome were noted. The mean age was 39 years (17-64). Nine patients were injured during sexual intercourse. All the patients presented with the presumptive diagnosis of penile fracture. False penile fracture was evoked in one patient presenting a new erection. Surgical penile exploration was carried out for all the patients without any radiological explorations. It revealed nonspecific dartos bleeding in 10 cases and avulsed superficial dorsal vein in six cases requiring venous ends ligation. All the patients regained penile appearance and potency. We can hardly distinguish false penile fracture from 'true' penile fracture with certainty either clinically or radiologically, thus, surgical exploration is mostly necessary. The prognosis is excellent.
The major constraint in a multi-hop wireless mesh network where all routers emit a traffic to the... more The major constraint in a multi-hop wireless mesh network where all routers emit a traffic to the gateway is the bottleneck around this one. This problem limits the network performance, particularly the network capacity. To improve network performance, we studied in this work the scheduling around the gateway. We defined two types of nodes ; the first one contains k-hops gateway-distant nodes which are working with the TDMA medium access protocol. The second type contains the remaining nodes that are functioning with CSMA/CA. We focus on two approaches that we suggested : the first aims to increase the number of slots in the TDMA area after having determined its optimal scheduling. The second aims to increase the TDMA area. We'll show through simulation, that more relevant network performances (carried traffic, loss rate, network capacity, etc.) are obtained using these approaches than a network without scheduling.
This paper is focused on broadband wireless mesh networks based on OFDMA resource management, con... more This paper is focused on broadband wireless mesh networks based on OFDMA resource management, considering a realistic SINR model of the physical layer with a fine tuned power control at each node. A linear programing model using column generation leads to compute power efficient schedules with high network capacity. Correlation between capacity and energy consumption is analyzed as well as the impact of physical layer parameters -SINR threshold and path-loss exponent. We highlight that there is no significant tradeoff between capacity and energy when the power consumption of idle nodes is important. We also show that both energy consumption and network capacity are very sensitive to the SINR threshold variation.
In this paper, we focus on broadband wireless mesh networks like 3GPP LTE-Advanced. This technolo... more In this paper, we focus on broadband wireless mesh networks like 3GPP LTE-Advanced. This technology is a key enabler for next generation cellular networks which are about to increase by an order of magnitude the capacity provided to users. Such an objective needs a significative densification of cells which requires an efficient backhauling infrastructure. In many urban areas as well as under-developed countries, wireless mesh networking is the only available solution. Besides, economical and environmental concerns require that the energy expenditure of such infrastructure is optimized.
The capacity of a multi-hop wireless network is the traffic payload that it can transport. This i... more The capacity of a multi-hop wireless network is the traffic payload that it can transport. This is a prominent quality of service issue, particularly in the highly constrained settings of 802.11 wireless mesh network. In this paper, we consider two complementary definitions of the capacity. A network-wise capacity is defined as the sum of the upload traffic, and a flow-wise capacity highlighting the unfairness among traffic flows. We study the behavior of these capacities face to several parameters: routing protocols, number and location of gateways bridging the network to the Internet, and the physical network topology. Thorough simulations highlight the insensitivity of the capacity face to these parameters while it is directly related to the congestion around the gateway. Furthermore, we show that if the number of gateways increases, the capacity tends to a maximum boundary.
We determined the value of diagnostic and therapeutic approaches of false penile fractures and th... more We determined the value of diagnostic and therapeutic approaches of false penile fractures and the outcome of treatment. We retrospectively reviewed 16 cases of presumed penile fracture with a negative surgical exploration. Clinical presentation, technique of treatment and outcome were noted. The mean age was 39 years (17-64). Nine patients were injured during sexual intercourse. All the patients presented with the presumptive diagnosis of penile fracture. False penile fracture was evoked in one patient presenting a new erection. Surgical penile exploration was carried out for all the patients without any radiological explorations. It revealed nonspecific dartos bleeding in 10 cases and avulsed superficial dorsal vein in six cases requiring venous ends ligation. All the patients regained penile appearance and potency. We can hardly distinguish false penile fracture from 'true' penile fracture with certainty either clinically or radiologically, thus, surgical exploration is mostly necessary. The prognosis is excellent.
The major constraint in a multi-hop wireless mesh network where all routers emit a traffic to the... more The major constraint in a multi-hop wireless mesh network where all routers emit a traffic to the gateway is the bottleneck around this one. This problem limits the network performance, particularly the network capacity. To improve network performance, we studied in this work the scheduling around the gateway. We defined two types of nodes ; the first one contains k-hops gateway-distant nodes which are working with the TDMA medium access protocol. The second type contains the remaining nodes that are functioning with CSMA/CA. We focus on two approaches that we suggested : the first aims to increase the number of slots in the TDMA area after having determined its optimal scheduling. The second aims to increase the TDMA area. We'll show through simulation, that more relevant network performances (carried traffic, loss rate, network capacity, etc.) are obtained using these approaches than a network without scheduling.
This paper is focused on broadband wireless mesh networks based on OFDMA resource management, con... more This paper is focused on broadband wireless mesh networks based on OFDMA resource management, considering a realistic SINR model of the physical layer with a fine tuned power control at each node. A linear programing model using column generation leads to compute power efficient schedules with high network capacity. Correlation between capacity and energy consumption is analyzed as well as the impact of physical layer parameters -SINR threshold and path-loss exponent. We highlight that there is no significant tradeoff between capacity and energy when the power consumption of idle nodes is important. We also show that both energy consumption and network capacity are very sensitive to the SINR threshold variation.
In this paper, we focus on broadband wireless mesh networks like 3GPP LTE-Advanced. This technolo... more In this paper, we focus on broadband wireless mesh networks like 3GPP LTE-Advanced. This technology is a key enabler for next generation cellular networks which are about to increase by an order of magnitude the capacity provided to users. Such an objective needs a significative densification of cells which requires an efficient backhauling infrastructure. In many urban areas as well as under-developed countries, wireless mesh networking is the only available solution. Besides, economical and environmental concerns require that the energy expenditure of such infrastructure is optimized.
The capacity of a multi-hop wireless network is the traffic payload that it can transport. This i... more The capacity of a multi-hop wireless network is the traffic payload that it can transport. This is a prominent quality of service issue, particularly in the highly constrained settings of 802.11 wireless mesh network. In this paper, we consider two complementary definitions of the capacity. A network-wise capacity is defined as the sum of the upload traffic, and a flow-wise capacity highlighting the unfairness among traffic flows. We study the behavior of these capacities face to several parameters: routing protocols, number and location of gateways bridging the network to the Internet, and the physical network topology. Thorough simulations highlight the insensitivity of the capacity face to these parameters while it is directly related to the congestion around the gateway. Furthermore, we show that if the number of gateways increases, the capacity tends to a maximum boundary.
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