Periodicals of Engineering and Natural Sciences (PEN - International University of Sarajevo)
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Face recognition of face images with hidden parts using gabor wavelets and PCA
Full text linkFace Recognition is one of the biometric methods that has recently gained significant attention at the level of research and the scientific community. However, in some special cases, face recognition methods can be sensitive to illumination, facial expressions, aging, face orientation, pose variation and hidden parts of face images, which make recognition very difficult. In this paper, we are interested in the hidden parts of a face image specifically those hidden by facial hair and/or a hair style. We first tested the Eigenfaces method for these modified images; but this approach failed to recognize them. So we have proposed an algorithm that combines Gabor magnitude and phase and PCA. To evaluate the efficiency of our algorithm, we used a variety of face images of FEI Brazilian database and hid the hairstyle and facial hair (barbs) to recognize them from the database images. The obtained results show that the proposed method (Gabor filter and PCA) attained high efficiency in the recognition for this type of problem
Assessment of Solar Energy Source Distribution and Potential in Zambia
Full text linkZambia is vastly endowed with a wide range of energy resources. Yet, to date, Zambia has not fully exploited its potential in solar energy utilisation for electricity generation due to various reasons such as lack of understanding of the distribution of solar energy potential in the country and limitation of access to solar energy resource information. This paper assesses the solar energy distribution and potential in Zambia. Nine provinces with different geographical and climatic regions that makes up Zambia were assesed. The distribution of solar radiation within the country were assessed using spatial analysis in ArcGIS Software. The 22year period solar datasets were considered for assessment. These datasets were obtained from NASA Atmospheric Science Data Center using Surface Meteorology and Solar Energy. The analyzed results indicate that Zambia has approximately 20,442TWh/year technical solar energy potential and receives 2109.97kWh/m2 of solar energy per year with 4403.12hours of sunshine. The country has 186,121km2 available and suitable land area for RETs implementations. This study is important as it present an overview of the technical solar energy potential for Zambia which is vital for decision making, energy mix and sustainable deployment of solar energy technologies in the country
Elongata Sy Hu In Function of Improving the Quality of the Environment
Full text linkInterest in paulownia got its momentum around the world. With its fast-growing nature and large leaf surfaces this species can absorb significant amounts of sulfur dioxide and dust particles.
The cities of Tuzla and Lukavac, as most other Bosnian-Herzegovinian towns, have a number of geo-ecological problems, and the most pronounced one is negative anthropopressing on the atmospheric complex and pedospheric cover. This area, especially during the winter period, has a disrupted air quality where the greatest polluters are individual heating places, transport, industry, and energy sector. The pedologic cover of the wider area of Tuzla and Lukavac has suffered significant changes and is largely devastated. The processes of destruction of soils lead to complete destruction or formation of a new land with modified characteristics. High rainfall is a major cause of destabilization of slopes, but also is the negative anthropogenic activity in the area. Landslides have caused significant material damages, particularly in the residential structures of slope zones of the mentioned cities and suburban areas. This paper presents the basic biological characteristics of woody species paulownia elongata, and the possibility of planting it in areas that are now unused so to improve the quality of air, as well as on surfaces that are threatened by landslides
Resilient safety anti-terrorism city terrorism as a new challenge in contemporary Iraqi city
Full text linkResilience against a variety of common and disruptive threats of terrorism is increasingly valuable in terms of the way communities are designed, operated and how urban practitioners are working to improve the community safety level. This is especially true of communities and cities, activities that are considered susceptible to terrorist attacks. This work explores a robust approach to create a safe climate, safety societies in ways that can decrease the likelihood and effect of a terrorist attack.
In specific, the research problem was: The inability of our cities to face the Unpredictable challenges (terrorism attacks) with a resilient flexible strategies that’s contributed in reduces the urban safety.
The research assumes: adoption of resilience strategy will contribute to increase the city safety against the Unpredictable challenges (terrorism attacks).
The research aimed to: reach more resilient safety cities that can confront the Unpredictable challenges (terrorism attacks) through its community and built environment.
The research methodology was: Explain the concepts of resilience, resilient cities and its characteristics and approaches, then adopt an integration approach to drop it on the characteristics of safety city as access to the indicators of resilient safety anti- terrorism city with Canada\u27s experience anti-terrorism attacks as case study.
The important conclusions were: There is necessity for professionals with a culture of terrorism to set up alerts and alarm the people before the risk entering. Resilience proxies depend on urban system type and its components that’s differs from place to another, one of the robust resilient city approaches was: integrated-forward looking approach it is not only react to emergent threats, however may draw trends to survive , take off the city systems
ACE-D/I SNP polymorphism in Iraqi patients with chronic renal failure in Thi-Qar province
Full text linkPrecise characterization of clinical phenotypes and revelation of genetic markers for the predisposing to have renal maladies or alter its course has been bothersome and exhausting. However, some genetic variants have been linked to kidney disorders. This study involved 120 subjects (70 hemodialysis-treated patients with chronic renal failure and 50 healthy subjects as control). Serum biochemical parameters creatinine and urea were detected as diagnostic markers to renal functions. Sixty subjects (44 patients & 16 control) were genotyped for polymorphism of the enzyme gene conversion of angiotensin. The distribution of genotype and allele frequencies for angiotensin- converting enzyme - Deletion / Insertion single nucleotide polymorphisms has been evaluated in both groups. The levels of biochemical parameters creatinine, and urea in renal failure patients increased significantly when compared with healthy .The angiotensin-converting enzyme genotypes distribution between subjects groups in Thi- Qar indicated that the percentage of DD genotype was found to be high in the group of 23 patients (52.3%), followed by ID 16 (36.3%) and II genotype 5 (11.4%). As, the genetic pattern in the control group showed that the genotype DD and ID patterns had the same percentage of 37.3%, followed by genotype II, 25% . Also, there is an increase of D- allele frequencies in the group of patients equivalent with healthy controls. The high frequency of angiotensin-converting enzyme DD genotype and D allele compared to control in chronic renal failure patients can be a significant factor in the development of renal failure
Clustering of Gamma-aminobutyric Acid Type A Receptor
Full text linkTargeting, clustering and immobilization of the neurotransmitter receptors is a complex process of molecularorganization. At the postsynaptic level, anchoring protein model has been proposed for the mechanism of thisorganization. NMDA type of Glutamate receptors are anchored by the PSD 95 at the postsynaptic membrane. Gephyrinis essential for the anchoring of Glycine receptors and so Agrin for the Acetylcholine receptors at the post synaptic sites.In line with this, for Gamma-aminobutyric acid type A receptors (GABAARs), the similar concept has been expected butthe heterogeneity and complexity of GABAARs make their analysis extremely difficult. This paper will briefly discuss thecurrent perspectives on the clustering of selected GABAAR subtypes in terms of anchoring protein model. 
Science and Technology Parks and University Collaborations
Full text linkScience and technology parks (STP) are seen as a catalyzer for the economic and industrial development for developingcountries. For future STPs , it’s needed to determine from beginning to last version of them, their properties, similar anddifferent structures, regional priorities, expectations and etc. This study will demonstrate to create a new science andtechnology parks, what the potential advantages and disadvantages are and what the factors should be taken account,etc. as a compiling review.The success of the STPs close related to University collaborations. Universities are supporting the STP firms asresearchers and laboratories. University based STPs have much more benefits for researches and innovations,incubation activities, start-up/spin off firms and entrepreneurship opportunities
Technology enhanced learning in teachers’ professional development
Full text linkThere is a lot of attention focused on the development of digital competency already in early age. One of the key person is teacher. To develop teachers’ digital skills, technology enhanced learning can be used in their professional development. There is large change in Latvia’ education system. One of the changes is subject “Computing” that will be compulsory in all schools from 2019. From 2015 Liepaja University participates in a pilot project for this purpose and is only one that offers teachers’ professional development courses for the subject. Article’s aim is to introduce “Computing” course, mainly the last one what was organized mostly in webinar mode. The article shows first data from teachers’ survey about their attitude to a webinar. This is the first article in a series about research made on this course
Research on upper limb biomechanical system
Full text linkBiomechanical systems for human upper limb have been studied and developed for more than 60 years, due to requirements of improving life quality for people who cannot partially, or totally, use their hand. This paper presents aspects related to preliminary research (kinematic model of thumb, 3D mechanic model, hard-software platform) of a bionic hand that will be done and is intended to be of high sensitivity, good accuracy, low weight, friendly user interface, with efficient command and control system
Concept for a multi-purpose academic gripper
Full text linkIn “concept for a new precise academic gripper” the mechanical aspects of the new gripper were presented [3]. In this paper, the idea is improved and expanded towards a clever control part. This paper mainly focuses on the functional ideas and the state of research concerning the imaging tasks. Experiment and intermediate results of the imaging process are discussed. Different approaches of skin colour detection in diverse colour spaces have been tested. Skin colour detection is investigated whether skin colour can be monitored to improve work safety in terms of functional safety. To enhance versatility, several ideas are combined to form a clever gripping device