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Search Results: 1 - 10 of 478 matches for " Cosmin Stoica Spahiu "
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Cosmin Stoica Spahiu
International Journal of Computer Science & Applications , 2010,
Cristina Teodora B L CEANU,Cosmin STOICA
Lex et Scientia , 2011,
Abstract: This paper aims to identify valences of Romanian consumer profiles and the main influencing factors of income, especially income of labor. Also, we try to establish causal links between economic growth, income and investment on the one hand, and consumption support, on the other hand.
Annals of the University of Oradea : Economic Science , 2009,
Abstract: In this paper, we proposed to demonstrate the possibility of correct determination of the goodwill size and the causing factors, through the use of econometric models based on the subtle sets theory. This thematic approach motivation starts from the fact
General Markowitz Optimization Problems  [PDF]
George Stoica
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.312A281

We solve two Markowitz optimization problems for the one-step financial model with a finite number of assets. In our results, the classical (inefficient) constraints are replaced by coherent measures of risk that are continuous from below. The methodology of proof requires optimization techniques based on functional analysis methods. We solve explicitly both problems in the important case of Tail Value at Risk.

Neutrino Properties Probed by Lepton Number Violating Processes  [PDF]
Sabin Stoica
Open Journal of Microphysics (OJM) , 2013, DOI: 10.4236/ojm.2013.33B002

Study of neutrino properties is nowadays one of the most active domains of research in physics. On the one hand, fundamental properties of the neutrinos like their absolute mass, their character (are they Dirac or Majorana particles?) and the number of neutrino flavors, are still unknown. On the other hand, the knowledge of these properties are of great importance since the neutrinos are very abundant in nature and play a key role in nuclear and particle physics, astrophysics and cosmology. In addition, the results of the neutrino oscillation experiments have convincingly showed that neutrinos have mass and mix, in contradiction to the initial assumptions of the Standard Model. In this context there is an increased interest in the study of the Lepton Number Violating (LNV) processes, since they are capable to decide on the above mentioned neutrino properties. Since recently, the neutrinoless double beta (0nββ) decay was considered the only process able to distinguish between Dirac or Majorana neutrinos and to give a hint on the absolute mass of the electron neutrino. At present, the increased luminosity of the LHC experiments at CERN makes it feasable the search for LNV processes at LHC as well. Besides the neutrino character, these studies can also shed light on the existence of other types of neutrinos (the sterile neutrinos), than the three known ones. In this paper, I make a brief review on our present knowledge about the neutrino properties and on the way they can be probed by LNV processes at low- and high-energies. Particularly, I refer to the 0nββ decay process and to the first attempts of searching of LNV processes in hadron collider experiments, particularly in LHC experiments at CERN-Geneva.

Determination of Central Corneal Thickness in Patients with Refractive Anomalies and Emmetropy  [PDF]
Mimoza Ismaili, Gazmend Ka?aniku, Kelmend Spahiu, Gentian Hoxha, Наташа На?ева-?аневска, Весна Димовска-?орданова
Open Journal of Ophthalmology (OJOph) , 2019, DOI: 10.4236/ojoph.2019.92005
Abstract: Aim: The purpose of this study was to compare measurements of CCT in emmetropia and patient with refractive anomalies. Methods: We represent a retrospective research which was conducted at the University Clinical Center of Kosovo (UCCK). In this study were included 80 patients, divided into two groups: test and a control group. Mean age was (M = 25.90, DS = 7.16), men (N = 41% or 51.3%) and women (N = 39% or 48%). Results: Results show that there were no differences in the CCT, Hyperopic (M = 545.21 DS = 52.24), Myopic (M = 547.90 DS = 47.93) and Emmetropic (M = 550.75 DS = 41.29). After measuring of the longitudinal axis and analyzing the data by means of Anova test, it appeared to be a significant difference between the analyzed groups, Hyperopic (M = 21.99, DS = 1.27), Myopics (M = 23.21, DS = 1.24), Emmetropic (M = 22.36, DS = 0.81). Results also revealed that there is correlation between the CCT and IOP, where increase CCT decreases IOP and vice versa (r = -0.26, p = 0.01). Conclusion: The results have shown that CCT is thinner in myopic but does not show correlation with hypermetropic and emmetropic. While during the measurement of central corneal thickness and eye tension it is found that there is a negative correlation between them. Keratometry has a negative correlation with CCT. While there was no correlation between CCT and age. Given the role of CCT in interpreting IOP values, it is recommended to perform a systematic CCT measurement in routine clinical practice, which would assist in the diagnosis of ocular hypertension.
Gnedenko-Raikov’s Theorem Fails for Exchangeable Sequences  [PDF]
George Stoica, Deli Li
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.312A277

We study the connection between the central limit theorem and law of large numbers for exchangeable sequences, and provide a counterexample to the Gnedenko-Raikov theorem for such sequences.

Bizarre Parosteal Osteochondromatous Proliferation of the Skull in a Young Male  [PDF]
Radu Baz, Cosmin Niscoveanu
Open Journal of Radiology (OJRad) , 2013, DOI: 10.4236/ojrad.2013.33022

Bizarre parosteal osteochondromatous proliferation (BPOP), as defined by Nora and colleagues in 1983 (also called Nora lesion), is a rare lesion. About 160 cases of BPOP have been presented in the literature to date. The lesion is an exophytic outgrowth from the cortical surface consisting of bone, cartilage and fibrous tissue. These types of lesions have been reported mostly in the hands and feet. Localization at the level of the skull is extremely rare. We report a case of a young man with multiple Nora’s lesions with atypical localization in the skull and mandible.

The influence of season collection of explants on micropropagation of peach rootstock GF-677
Elektra Spahiu,Bari Hodaj,Petrit Rama
Albanian Journal of Agricultural Sciences , 2013,
Abstract: The influence of season on the rate of multiplication on in vitro culture of peach rootstock GF- 677 was investigated on Murashige and Skoog (MS) media, supplemented with GA3 0.1 mg/L and IAA 0.1mg/l. Benzyladenine (BAP) at concentrations 1mg/l was used in the multiplication stage and 1mg/l IBA in the stage of rooting. Shoot-tip and nodal segment explants were collected from 5 years old rootstock GF-677 (Prunus persica x Prunus amygdalus) in February 24th (from dormant shoots that have been sprouted in climatic room), March 22th, April 20th, May 18th and September 15th during the 2009 growing season and have been sterilized by sodium hypochlorite (NaOCl) 10% for 20 min. The data on the effect of the season collection of the explants on number of shoots per explants, the mean shoot length and the percentage of rooted shoots were recorded six weeks after culture. In vitro performance of explants indicated a positive correlation between shoot proliferation and season collection The highest number of shoots per explants (3,5) was obtained on explants collected in March 22th (3,5), which was on a par with explants collected in February 24th (from shoots that have been sprouted in climatic room). Moreover, the highest shoot length was observed on explants collected on February and March (1,53cm and 1,505cm respectively). The percentage of rooted shoots from explants sampled on February was not markedly greater than those sampled on March. The number of shoots per explants, the shoot length and the percentage of rooted shoots on explants sampled in April, May and September were significantly lower than those sampled in February and March. The amount of chlorophyll a + b of the shoots coming from explants collected in March was markedly greater than those collected in February, April, May and September.
Efficacy and Safety of Travoprost and Timolol Fixed Combination Compared to Travoprost in Patients with Primary Open Angle Glaucoma and Ocular Hypertension  [PDF]
Gentian Hoxha, Kelmend Spahiu, Gazmend Ka?aniku, Mimoza Ismaili, F?llanza Ismajli-Hoxha
Open Journal of Ophthalmology (OJOph) , 2017, DOI: 10.4236/ojoph.2017.73024
Abstract: Purpose: To compare intraocular pressure (IOP)-lowering efficacy and safety of travoprost 0.004% and travoprost 0.004% and beta-blocker 0.5% fixed combination ophthalmic solution in patients with open-angle glaucoma and ocular hypertension. Methods: In this prospective, multicentre clinical trial, 62 patients received travoprost 0.004% (n = 31) or travoprost 0.004% and beta-blocker 0.5% fixed combination (n = 31). Efficacy and safety were compared across treatment groups over 2 years. IOP reduction and adverse events were examined at 3, 6, 12 and 24 months for each group. Results: Mean IOP at the first visit in the travoprost 0.004% group was 26.4 (SD ± 2.1), and travoprost 0.004%/timolol 0.5% group was 26.3 (SD ± 2.1). Mean IOP after 24 months in the travoprost 0.004% group was 20.5 (SD ± 1.5) and travoprost 0.004%/timolol 0.5% group was 18.5 (SD ± 1.5). There were statistically significant differences in IOP in both eyes after third visit (after 1 year) and fourth visit (after 2 years). Conclusion: After 2 year of treatment, travoprost 0.004%/timolol 0.5% produced clinically relevant IOP reductions in patients with open-angle glaucoma or ocular hypertension that were greater than those produced by travoprost 0.004% alone.
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