klinkenberg permeability is an important parameter in tight gas reservoirs. there are conventional methods for determining it, but these methods depend on core permeability. cores are few in number, but well logs are usually accessible for all wells and provide continuous information. in this regard, regression methods have been used to achieve reliable relations between log readings and klinke...

multiforme. Right: NNMF abundances for the normal constituent vector [0.651 0.194 0.156]. White reflects high abundances and black corresponds to low abundances. The abundances visualize tumor infiltration. Figure 4. Left: T2-weighted MR image of a patient with glioblastoma multiforme. Right: NNMF abundances for the normal constituent vector [0.789 0.082 0.129]. White reflects high abundances a...

in recent years, the needs of the internet are felt in lives of all people.  accordingly, many studies have been done on security in virtual environment. old technics such as firewalls, authentication and encryption could not provide internet security completely; so, intrusion detection system is created as a new solution and a defense wall in cyber environment. many studies were performed on d...

internet applications spreading and its high usage popularity result insignificant increasing of cyber-attacks. consequently, network security has becomea matter of importance and several methods have been developed for these attacks.for this purpose, intrusion detection systems (ids) are being used to monitor theattacks occurred on computer networks. data mining techniques, machinelearning, ne...

porosity is considered as an important petrophysical parameter in characterizing reservoirs, calculating in-situ oil reserves, and production evaluation. nowadays, using intelligent techniques has become a popular method for porosity estimation. support vector machine (svm) a new intelligent method with a great generalization potential of modeling non-linear relationships has been introduced fo...

different approaches have been proposed for feature selection to obtain suitable features subset among all features. these methods search feature space for feature subsets which satisfies some criteria or optimizes several objective functions. the objective functions are divided into two main groups: filter and wrapper methods.  in filter methods, features subsets are selected due to some measu...

segmentation and three‑dimensional (3d) visualization of teeth in dental computerized tomography (ct) images are of dentists’ requirements for both abnormalities diagnosis and the treatments such as dental implant and orthodontic planning. on the other hand, dental ct image segmentation is a difficult process because of the specific characteristics of the tooth’s structure. this paper presents ...

PURPOSE The chemokine receptor CXCR4 is expressed in many different cancers. In malignant brain tumors, CXCR4 signaling has been implicated in tumor growth, survival, and migration, and pharmacologic inhibition of CXCR4 results in decreased tumor growth in preclinical models. To understand how CXCR4 inhibitors may be incorporated into clinical therapy, we examined determinants of responsiveness...

Tumor cells rely preferentially on anaerobic glycolysis rather than on respiration for ATP generation, a phenomenon known as the Warburg effect. We explored the effects of glucose withdrawal on glioblastoma multiforme-derived cell lines and their nontransformed counterparts, normal human astrocytes. We found that glucose withdrawal induces extensive apoptosis in glioblastoma multiforme cells bu...

2 Observations The glioblastoma multiforme data is stored in a data.frame which needs to be converted to a SMAPObservations object prior to analysis. The required arguments for the SMAPObservations constructor function are: value A numeric vector of intensity ratios for each clone on the array chromosome A character vector of chromosomes annotated to the clones on the array startPosition A nume...