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Medium 9781601323248

χSET: Image Coder based on Contrast Band-Pass Filtering

Hamid R. Arabnia, Leonidas Deligiannidis Joan Lu, Fernando G. Tinetti, Jane You, George Jandieri, Gerald Schaefer, and Ashu M.G. Solo CSREA Press PDF


Int'l Conf. IP, Comp. Vision, and Pattern Recognition | IPCV'14 |

χSET: Image Coder based on Contrast Band-Pass Filtering

Jaime Moreno†‡, Oswaldo Morales†, and Ricardo Tejeida†

†Superior School of Mechanical and Electrical Engineers, National Polytechnic Institute of Mexico,

IPN Avenue, Lindavista, Mexico City, 07738, Mexico.

‡Signal, Image and Communications Department, University of Poitiers, Poitiers, 30179, France.

Abstract— Noise is fatal to image compression performance because it can be both annoying for the observer and consumes excessive bandwidth when the imagery is transmitted [1], [2]. Some noise, in addition to some numerical redundancy, is removed during the quantization process, but in some circumstances the removed information is easily perceived by the observer, leading to annoying visual artifacts. Perceptual quantization reduces unperceivable details and thus improve both visual impression and transmission properties. In this work, we apply perceptual criteria in order to define a perceptual forward and inverse quantizer. It is based on the CBPF, a low-level computational model that reproduces color perception in the Human Visual System.

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Medium 9781576751053

8 Leading Individuals to Become Self-Leaders

Charles C. Manz Berrett-Koehler Publishers ePub

HOW DID GENERAL DWIGHT D. EISENHOWER become such an admired leader? In the years prior to World War II, we can trace the development of Eisenhower’s leadership style. As he absorbed the military environment he learned to be delegated to and, in turn, to delegate authority. Ike learned leadership through exposure to models that strongly facilitated his own self-leadership skills.1

One of the greatest influences and most important models in Eisenhower’s life and career was General George C. Marshall. Their relationship has been described variously as being like that of father and son, leader and protégé, and partners. Undoubtedly, Eisenhower learned much from Marshall.

From the very start, Marshall let it be known that he wanted no yes-men in his camp. On Eisenhower’s first day at the War Plans Department at the beginning of World War II, Marshall called him into his office and asked Ike what the United States’ Philippine strategy should be. Eisenhower spent the day at his desk, then returned with an analysis of the Philippine situation and a recommended strategy. Marshall was pleased with Ike’s response to the task: “Eisenhower, the Department is filled with able men who analyze their problems well but feel compelled always to bring them to me for final solution. I must have assistants who will solve their own problems and tell me later what they have done.”2 Ike understood the significance of autonomy, of “owning” a job and doing it well in his own style.

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Medium 9781601322500

Spectrum Detection and Spectrum Decision in Cognitive Radio Networks Using Intelligent Mobile Agents

Hamid R. Arabnia, Victor A. Clincy, Leonidas Deligiannidis, George Jandieri, Ashu M. G. Solo, and Fernando G. Tinetti CSREA Press PDF

Int'l Conf. Wireless Networks | ICWN'13 |

Spectrum Detection and Spectrum Decision in Cognitive Radio Networks Using

Intelligent Mobile Agents

Nnenna Christine Eric-Nwonye and Obeten Obi Ekabua

Department of Computer Science

North-West University, Mafikeng Campus,

Private Bag X2046, Mmabatho 2735, South Africa


[ICWN’13] were introduced to utilize these idle channels but it has to be without interfering with the license owners.

To ensure non-interference to primary users (PU), cognitive radios or secondary users (SU) must sense the channel to detect the presence or absence of the primary user, and if absent, they can then make use of the spectrum. They also need to intermittently stop transmission to sense for the reappearance of the primary user. Spectrum detection, performed through spectrum sensing, is the key functionality to ensure efficient spectrum usage by cognitive radios.

It is however difficult for individual radios to reliably sense the occupancy state of the channel due to various channel degradation conditions such as multi-path fading and shadowing, leading to bad estimation of the occupancy state of the channel and false alarm. The dynamic nature of the radio spectrum therefore calls for the development of novel spectrum detection strategies to correctly estimate the occupancy state of a channel [5][6][7]. A feasible solution

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Medium 9781855756809

CHAPTER ONE: Delusional reality

Ira Steinman Karnac Books ePub

Aperson's behaviour is determined by his conscious and unconscious beliefs. We each have a Weltanschauung, a belief system that guides us and serves as an internal compass. Some people have trouble if their convictions conflict with each other; this is the pain of neurosis. Some have a great deal of trouble if their beliefs collide with other people's beliefs; here, issues of insecurity and conformity become paramount. Some people stick to their convictions about generally agreed reality in the face of all evidence to the contrary; this is the realm of psychosis and delusional belief.

A delusion is a firmly held belief in something false, a belief in something untrue for the rest of us, a set of ideas and concepts that guide and predetermine a person's behaviour, without adequate external corroboration. By definition, a delusion is clung to in the face of objections and rational arguments from others. Delusions make it impossible for a person to accurately perceive and function in day-to-day life.

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Medium 9781780491288


Voula Grand Karnac Books ePub

Madalena was lightly dozing in the back of the limousine, Jack next to her, reading the paper. They were on their way to Cardiff, after the casino opening the previous evening.

Slipping in and out of sleep, she was thinking about the party, a lavish affair, full of minor celebrities. Waking, she looked at Jack appraisingly. “That was quite a do last night wasn’t it?”

Jack glanced sideways at her. “Hmm.”

“You must have felt great; you worked so hard on that project.”

Jack lowered the newspaper and turned to Madalena. A slight, triumphant smile lit his face. “It did feel good, yes. I must say I felt really quite proud of myself. And there’ll be more business where that came from, especially with all the publicity.”

“Paparazzi everywhere; it’s going to be in Hello, an exclusive. We might be in Hello.”

“I’m sure you will be. You were the star of the show.”

Madalena warmed in the glow of approval. At the moment, she found herself grateful, pathetically so, for any small word of praise. She saved them up to comfort herself in the long sleepless nights of dread, fearing the collapse of the life she loved.

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