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Search Results: 1 - 10 of 1577 matches for " Aleksandar Godic "
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Sleeping on an Anti-Wrinkle Pillow Reduces Facial Wrinkles: Results from an Anatomical Study  [PDF]
Borut Poljsak, Aleksandar Godic, Rok Fink, Martina Oder, Tomaz Lampe, Raja Dahmane
Forensic Medicine and Anatomy Research (FMAR) , 2015, DOI: 10.4236/fmar.2015.32010
Abstract: Background: A special pillow was designed to redistribute mechanical stress during sleeping in order to slow down the formation of facial skin wrinkles. Objective: To investigate whether sleeping on a specially designed pillow reduces facial skin wrinkles. Participants and Methods: A 28-day pilot study was carried out in which fifteen healthy female volunteers aged 23 - 55 years (mean age 35. 6 ± 8.5) slept on an antiwrinkle pillow. Evaluation of facial wrinkles was conducted before commencing the study (T0), following at 14 days (T14), and at 28 days (T28) when the study ended. Wrinkle density was assessed by computerized analysis of 2D images of participants’ faces. Results: A statistically significant decrease in wrinkle density was detected while smiling around both eyes, around the right eye in a relaxed facial expression, on average in all observed facial areas, around the left periorbital area in participants who predominantly slept on their left side of the body, but not on the frontal area. Limitations: A 3D camera could be used to better visualize and analyze wrinkle density. Conclusions: Sleeping on the specially designed pillow reduces facial wrinkles.
Skin Photoaging and the Role of Antioxidants in Its Prevention
Ru?a Pandel,Borut Polj?ak,Aleksandar Godic,Raja Dahmane
ISRN Dermatology , 2013, DOI: 10.1155/2013/930164
Abstract: Photoaging of the skin depends primarily on the degree of ultraviolet radiation (UVR) and on an amount of melanin in the skin (skin phototype). In addition to direct or indirect DNA damage, UVR activates cell surface receptors of keratinocytes and fibroblasts in the skin, which leads to a breakdown of collagen in the extracellular matrix and a shutdown of new collagen synthesis. It is hypothesized that dermal collagen breakdown is followed by imperfect repair that yields a deficit in the structural integrity of the skin, formation of a solar scar, and ultimately clinically visible skin atrophy and wrinkles. Many studies confirmed that acute exposure of human skin to UVR leads to oxidation of cellular biomolecules that could be prevented by prior antioxidant treatment and to depletion of endogenous antioxidants. Skin has a network of all major endogenous enzymatic and nonenzymatic protective antioxidants, but their role in protecting cells against oxidative damage generated by UV radiation has not been elucidated. It seems that skin’s antioxidative defence is also influenced by vitamins and nutritive factors and that combination of different antioxidants simultaneously provides synergistic effect. 1. Introduction Unlike chronological aging, which is predetermined by individual’s physiological predisposition, photoaging depends primarily on the degree of sun exposure and on an amount of melanin in the skin. Individuals who have a history of intensive sun exposure, live in sunny geographical areas, and have fair skin will experience the greatest amount of ultraviolet radiation (UVR) skin load and consequently severe photoaging [1, 2]. Clinical signs of photoaging include wrinkles, mottled pigmentation (hypo- or hyperpigmentation), rough skin, loss of the skin tone, dryness, sallowness, deep furrows, severe atrophy, telangiectasias, laxity, leathery appearance, solar elastosis, actinic purpura, precancerous lesions, skin cancer, and melanoma [3, 4]. Sun-exposed areas of the skin, such as the face, neck, upper chest, hands, and forearms, are the sites where these changes occur most often [5]. Chronological skin aging, on the other hand, is characterized by laxity and fine wrinkles, as well as development of benign growths such as seborrheic keratoses and angiomas, but it is not associated with increased/decreased pigmentation or with deep wrinkles that are characteristic for photoaging [6]. Seborrheic keratoses are regarded as best biomarker of intrinsic skin aging since thier appearance is independent on sun exposure. While intrinsically aged skin does not
The Neglected Importance of Sleep on the Formation and Aggravation of Facial Wrinkles and Their Prevention  [PDF]
Borut Poljsak, Aleksandar Godic, Andrej Starc, Raja Dahmane
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2016, DOI: 10.4236/jcdsa.2016.63012
Abstract: The duration of sleep and the position of the face while resting on a pillow have a negative impact on the facial skin appearance and may lead to the formation of sleep wrinkles. Sleep lines occur when there is repetitive, long-term tension on the facial skin, which pushes or pulls the skin in a direction that is perpendicular to the direction of the muscles of the face. These lines tend to be more vertically oriented than expression lines and can be found on the forehead, around the eyebrows, the eyes, the cheeks, the chin, and the nasolabial folds. Our studies revealed that the average reduction of wrinkles in total investigated area of the face (expressed as the density of wrinkle per surface skin) was approximately 12% after 28 days of sleep on a specially-designed pillow. The specially designed anti-wrinkle pillows eliminate the pressure on the cheeks, the eyes and the mouth during sleep. Many such pillows have been designed to reduce the aging process and to encourage users to sleep in specific positions. Evidence supporting the claim that a special pillow prevents wrinkles was presented. Nevertheless, prolonged human studies are required to further elucidate the role of sleeping on appearance of facial wrinkles.
ORGANIZATIONAL STRUCTURE, REPRESENTATION, SUGGESTIONS FOR DEVELOPMENT OF SCHOOL SPOTS IN MACEDONIA
Aleksandar Tufekcievski,Aleksandar Aceski
Research in Physical Education, Sport and Health , 2012,
Abstract: The basic preconditions to successful functioning of sports at school are the skilled teaching staff, sport facilities in schools, the students’ interest in sport and management of the extracurricular activities. Macedonian School Sport Federation includes activities at different levels that contribute to the development of sport in the Republic of Macedonia. Involvement of students in sports activities implies that it is necessary to make even greater efforts for greater participation in sports activities.
ANALYSES OF THE PRESENCE OF DEVELOPMENTAL SEQUENCES FORRUNNING IN SCHOOL BOYS USING COMPONENTBODY APPROACH
Aleksandar Aceski,Aleksandar Tufekcievski
Research in Physical Education, Sport and Health , 2012,
Abstract: Fundamental movement skills are foundation for other more specialized and more complex movement patterns that are present in sport and physical activities. Physical education teacher should monitor the development level of these skills in order to assess the performance of the skills through which he can get relevant information about the strengths and weaknesses of the performance.The aim of this research is to determine the percentage of body components that define the development level of fundamental movement skill of locomotor type - running using component body approach. Running is divided into developmental sequences. There are two body components which include steps in their development. The sample included 460 male children 3-10 years old. All children performed three consecutive runnings. All trials are analyzed with qualitative analysis and after that we calculated the percentage of presence for the steps of development for both body components. The highest step of development sequences which is at least present (observed) can be considered as the most difficult to perform and that which is the most present is easiest to perform. According to the results the most difficult to achieve for 3 year old children are both body components which are not present at all. The most difficult for 4-10 years old is the body component which defines arm action (4,92%, 13,84%, 29,63%, 32,2%, 40,38%, 41,36%, 56,86%). The results from our research also show that there is a positive increasing trend of percentage in the two highest steps of body components. Knowing the level of development of fundamental movement skills by teacher is crucial in order to achieve a higher level of performance. Therefore, it is recommended that the teacher should continuously monitor and record the performance of the fundamental motor skills.
Einstein's mirror revisited
Aleksandar Gjurchinovski,Aleksandar Skeparovski
Physics , 2007, DOI: 10.1119/1.2981289
Abstract: We describe a simple geometrical derivation of the formula for reflection of light from a uniformly moving plane mirror directly from the postulates of special relativity.
Fermat's principle of least time in the presence of uniformly moving boundaries and media
Aleksandar Gjurchinovski,Aleksandar Skeparovski
Physics , 2007, DOI: 10.1088/0143-0807/28/5/017
Abstract: The refraction of a light ray by a homogeneous, isotropic and non-dispersive transparent material half-space in uniform rectilinear motion is investigated theoretically. The approach is an amalgamation of the original Fermat's principle and the fact that an isotropic optical medium at rest becomes optically anisotropic in a frame where the medium is moving at a constant velocity. Two cases of motion are considered: a) the material half-space is moving parallel to the interface; b) the material half-space is moving perpendicular to the interface. In each case, a detailed analysis of the obtained refraction formula is provided, and in the latter case, an intriguing backward refraction of light is noticed and thoroughly discussed. The results confirm the validity of Fermat's principle when the optical media and the boundaries between them are moving at relativistic speeds.
Estimates of convolutions of certain number-theoretic error terms
Aleksandar Ivi
International Journal of Mathematics and Mathematical Sciences , 2004, DOI: 10.1155/s0161171204305156
Abstract: Several estimates for the convolution function C [f(x)]:=∫1xf(y) f(x/y)(dy/y) and its iterates are obtained when f(x) is a suitable number-theoretic error term. We deal with the case of the asymptotic formula for ∫0T|ζ(1/2
Origin of the Words Denoting Some of the Most Ancient Old World Pulse Crops and Their Diversity in Modern European Languages
Aleksandar Miki?
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0044512
Abstract: This preliminary research was aimed at finding the roots in various Eurasian proto-languages directly related to pulses and giving the words denoting the same in modern European languages. Six Proto-Indo-European roots were indentified, namely arnk(')- (‘a leguminous plant’), *bhabh- (‘field bean’), * (‘a kernel of leguminous plant’, ‘pea’), ghArs- (‘a leguminous plant’), *kek- (‘pea’) and *lent- (‘lentil’). No Proto-Uralic root was attested save hypothetically *ka?a (‘pea’), while there were two Proto-Altaic roots, *b?krV (‘pea’) and * (‘lentil’). The Proto-Caucasianx root * denoted pea, while another one, *hōw?(ā) (‘bean’, ‘lentil’) and the Proto-Basque root *i?ha-r (‘pea’, ‘bean’, ‘vetch’) could have a common Proto-Sino-Caucasian ancestor, *hVw?V (‘bean’) within the hypothetic Dené-Caucasian language superfamily. The Modern Maltese preserved the memory of two Proto-Semitic roots, *'ada?- (‘lentil’) and *pūl- (‘field bean’). The presented results prove that the most ancient Eurasian pulse crops were well-known and extensively cultivated by the ancestors of all modern European nations. The attested lexicological continuum witnesses the existence of a millennia-long links between the peoples of Eurasia to their mutual benefit. This research is meant to encourage interdisciplinary concerted actions between plant scientists dealing with crop evolution and biodiversity, archaeobotanists and language historians.
WHO global campaigns: A way forward in addressing public health importance of common neurological disorders
Aleksandar Janca
Annals of General Psychiatry , 2004, DOI: 10.1186/1475-2832-3-9
Abstract: The first large international collaborative activity on neurological disorders carried out by WHO and NGOs was a Global Initiative on Neurology and Public Health. This joint project began in early 1990s aiming to draw attention of health professionals, health administrators and general public to the frequency, severity and consequences of common neurological disorders and to have them acknowledged as public health problems by the Ministries of Health of some 190 WHO Member States. In order to achieve these objectives, the Global Initiative promoted the existing possibilities for the prevention of neurological disorders on a large-scale basis and emphasized that neurological treatment and care should be provided at all levels of health care and especially in primary care settings, where a great majority of patients with neurological disorders in different parts of the world receive their treatment and care [2]. In the context of this Global Initiative, WHO and NGOs jointly organized a series of symposia at numerous international and national conferences covering a plethora of public health aspects of neurological disorders such as epidemiology; assessment of costs and needs; organization of services; reduction of family and community burden; education and training; research on risk factors; and planing of programs and policies for control of neurological disorders [3]. It is interesting to note that this Global Initiative had no WHO or other budget behind it and was mainly running on the enthusiasm of its coordinators and participants. Nevertheless, the project achieved its objectives and served as a springboard to another WHO/NGO global public health endeavor, which came at the time of change in the leadership of WHO.The appointment of Dr Gro Harlem Brundtland as WHO Director-General in 1998 brought a significant change to the orientation of WHO programs and activities. Instead of dealing simultaneously with a variety of global issues of public health importance, th
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