Search results for: Karim Khalil

Items from 1 to 14 out of 14 results

article

Effects of pomegranate peel and olive pomace supplementation on reproduction and oxidative status of rabbit doe

Manal Bakeer, Hisham Abdelrahman, Karim Khalil

Journal of Animal Physiology and Animal Nutrition > 106 > 3 > 655 - 663

The current study aimed to investigate the effects of pomegranate peel and olive pomace supplementation on the reproductive hormones, antioxidative status, reproductive capacity and maternal behaviour of rabbit does. Forty does were used for the experiments. The animals were randomly assigned to four groups of ten does. One group was fed on the control diet and was considered the control group (C)...

article

The Y chromosome sequence of the channel catfish suggests novel sex determination mechanisms in teleost fish

Lisui Bao, Changxu Tian, Shikai Liu, Yu Zhang, more

BMC Biology > 2019 > 17 > 1 > 1-16

Background Sex determination mechanisms in teleost fish broadly differ from mammals and birds, with sex chromosomes that are far less differentiated and recombination often occurring along the length of the X and Y chromosomes, posing major challenges for the identification of specific sex determination genes. Here, we take an innovative approach of comparative genome analysis of the genomic sequences...

article

Single nucleotide polymorphisms in the growth hormone gene of Oreochromis niloticus and their association with growth performance

Suhaila Karim Khalil Jaser, Marco Aurélio Dessimoni Dias, Aline de Assis Lago, Rafael Vilhena Reis Neto, more

Aquaculture Research > 48 > 12 > 5835 - 5845

Polymorphisms in the growth hormone (GH) gene that is associated with the growth rate of farmed fish have been the target of many breeding programmes. The present study aimed to identify single nucleotide polymorphisms (SNPs) in GH gene regions to evaluate the association of SNP variations with the growth rate of two Nile tilapia: Oreochromis niloticus (Linnaeus, 1758) strains. The targeted regions...

chapter

Energy Efficient Object Detection in Camera Sensor Networks

Tuan Dao, Karim Khalil, Amit K. Roy-Chowdhury, Srikanth V. Krishnamurthy, more

2017 IEEE 37th International Conference on Distributed Computing Systems (ICDCS) > 1208 - 1218

2017 IEEE 37th International Conference on Distributed Computing Systems (ICDCS)

A wireless camera network can provide situation awareness information (e.g., humans in distress) in scenarios such as disaster recovery. If such camera sensors are battery operated, sending raw video feeds back to a central controller can be expensive in terms of energy consumption. Further, if all cameras were to use the optimal processing algorithm for object decision, they may also expend unnecessary...

article

Aquaculture genomics, genetics and breeding in the United States: current status, challenges, and priorities for future research

The Aquaculture Genomics, Genetics and Breeding Workshop, Hisham Abdelrahman, Mohamed ElHady, Acacia Alcivar-Warren, more

BMC Genomics > 2017 > 18 > 1 > 1-23

Advancing the production efficiency and profitability of aquaculture is dependent upon the ability to utilize a diverse array of genetic resources. The ultimate goals of aquaculture genomics, genetics and breeding research are to enhance aquaculture production efficiency, sustainability, product quality, and profitability in support of the commercial sector and for the benefit of consumers. In order...

chapter

Optimal Monitor Placement for Detection of Persistent Threats

Karim Khalil, Zhiyun Qian, Paul Yu, Srikanth Krishnamurthy, more

2016 IEEE Global Communications Conference (GLOBECOM) > 1 - 6

GLOBECOM 2016 - 2016 IEEE Global Communications Conference

We study optimal monitor placement for intrusion detection in networks with persistent attackers. The problem is modeled as a stochastic game in which the attacker attempts to control targets by delivering malicious packets while the defender tries to detect such attempts. The state of the game is determined by the target end-systems in the network, each of which can be in either a healthy or a compromised...

chapter

Collisions for secrecy in cooperative cognitive radio networks with time-varying connectivity

Karim Khalil, Eylem Ekici

2014 IEEE Globecom Workshops (GC Wkshps) > 1332 - 1336

2014 IEEE Globecom Workshops (GC Wkshps)

We study user cooperation in a cognitive radio network with random connectivity and collision channels, where the primary user has secrecy constraints. We characterize secure stable throughput region for multiple packet-level cooperative transmission protocols that incorporate packet relaying and collision generation. Stable throughput region is derived for each protocol and then compared to other...

chapter

Coexistence management for heterogeneous networks in white spaces

Karim Khalil, Golnaz Farhadi, Akira Ito

2014 International Conference on Computing, Networking and Communications (ICNC) > 691 - 697

2014 International Conference on Computing, Networking and Communications (ICNC)

Certain spectrum bands originally occupied by legacy systems such as TV transmission have been opened up for free and unlicensed access in many countries provided no interference to the incumbents. It is envisioned that heterogeneous networks will coexist in these white space bands sharing the available unlicensed spectra. Therefore, an efficient coexistence management scheme is needed to coordinate...

article

Iterative Fair Channel Assignment for Wireless Networks

Karim Khalil, Golnaz Farhadi, Akira Ito

IEEE Wireless Communications Letters > 2014 > 3 > 2 > 145 - 148

We introduce an orthogonal channel assignment algorithm that increases spectrum utilization via systematic re-use of channels, leveraging carrier aggregation capability supported in the latest access technologies and maintaining fairness across networks. Unlike conventional graph coloring, the proposed algorithm iterates over available channels assigning one channel at a time starting with a network...

article

Opportunistic Secrecy with a Strict Delay Constraint

Karim Khalil, O. Ozan Koyluoglu, Hesham El Gamal, Moustafa Youssef

IEEE Transactions on Communications > 2013 > 61 > 11 > 4700 - 4709

We investigate the delay limited secrecy capacity of the flat fading channel under two different assumptions on the available transmitter channel state information (CSI). The first scenario assumes perfect prior knowledge of both the main and eavesdropper channel gains. Here, upper and lower bounds on the delay limited secrecy capacity are derived, and shown to be tight in the high signal-to-noise...

article

Optimal Scheduling and Power Allocation in Cooperate-to-Join Cognitive Radio Networks

Mehmet Karaca, Karim Khalil, Eylem Ekici, Ozgur Ercetin

IEEE/ACM Transactions on Networking > 2013 > 21 > 6 > 1708 - 1721

In this paper, optimal resource allocation policies are characterized for wireless cognitive networks under the spectrum leasing model. We propose cooperative schemes in which secondary users share the time-slot with primary users in return for cooperation. Cooperation is feasible only if the primary system's performance is improved over the non-cooperative case. First, we investigate a scheduling...

chapter

Secrecy in cognitive radio networks: Turning foes to allies

Karim Khalil, Eylem Ekici

2013 11th International Symposium and Workshops on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks (WiOpt) > 194 - 200

2013 11th International Symposium on Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks (WiOpt)

We study a class of security problems in cognitive radio networks in which multiple half-duplex unlicensed (secondary) users independently eavesdrop the communications of licensed (primary) users unless granted access to communicate over the same spectrum band. The problem is to characterize the optimal rule for the primary system that grants spectrum access to selected secondary users and the optimal...

chapter

Multiple access game with a cognitive jammer

Karim Khalil, Eylem Ekici

2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR) > 1383 - 1387

2012 46th Asilomar Conference on Signals, Systems and Computers

We consider a two-user multiple access game in which one player (primary user) is interested in maximizing its data rate at the minimum possible transmission power and the other player (secondary, cognitive user) can either jam the primary traffic or coordinate with the primary user and send its own message to the common destination. The cognitive user employs noise forwarding as a leverage to maximize...

chapter

Optimal scheduling in cooperate-to-join Cognitive Radio Networks

Karim Khalil, Mehmet Karaca, Ozgur Ercetin, Eylem Ekici

2011 Proceedings IEEE INFOCOM > 3002 - 3010

IEEE INFOCOM 2011 - IEEE Conference on Computer Communications

Optimal transmission scheduling in wireless cognitive networks is considered under the spectrum leasing model.We propose a cooperative scheme in which secondary nodes share the time slot with primary nodes in return for cooperation. Cooperation is feasible only if the system's performance is improved over the non-cooperative case. First, we investigate a scenario where secondary users are interested...

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Search results for: Karim Khalil

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