JOSA year 17 no. 1 (38)
eISSN 2068-3049

CONTENTS

SECTION A – Mathematics

1. SOLUTION OF DIFFERENT TYPES OF FUZZY INTEGRO-DIFFERENTIAL EQUATIONS VIA LAPLACE HOMOTOPY PERTURBATION METHOD

(Jamshad Ahmad, Hira Nosher) / 5

2. SOLVING TWO POINT BOUNDARY VALUE PROBLEMS BY NUMEROV TYPE METHOD WITH AN INTERNAL BOUNDARY CONDITION

(Pramod Kumar Pandey) / 23

3. THE FUNDAMENTAL PROPERTY OF NAGEL POINT – A NEW PROOF

(Dasari Naga Vijay Krishna) / 31

4. GEODESICS, LINE OF CURVATURES AND ASYMPTOTIC CURVES VERSUS RELAXED ELASTIC LINES ON AN ORIENTED SURFACE

(Ergin Bayram, Emin Kasap) / 37

5. HOW ASYMPTOTIC SERIES HELP US TO FIND BOUNDS FOR SOME EXPRESSIONS

(Maria Nenezic Jovic, Branko Malesevic, Cristinel Mortici) / 41

6. BOUNDS FOR THE ENERGY OF A(G),L(G) USING 2-ADJACENCY

(Serife Buyukkose, Semiha Basdas Nurkahli, Nursah Mutlu) / 49

7. ANALYSIS MODEL FOR THE PROPAGATION OF THE EFFECT OF THE GOVERNMENTAL ACQUISITIONS MODIFICATION IN THE ECONOMY

(Sorin Gabriel Badea, Maria-Cristina Stefan, Dragos Panagoret) / 61

8. BINOMIAL TRANSFORMS OF QUADRAPELL SEQUENCES AND QUADRAPELL MATRIX SEQUENCES

(Can Kizilateş, Naim Tuglu, Bayram Çekim) / 69

9. PREDICTING EMPLOYEES EVALUATION PERFORMANCE USING SIMULATION AND MATHEMATICAL MODELING

(Nicoleta Valentina Florea, Doina Constanta Mihai) / 81

10. THE ANALYSIS OF THE DEGREE OF PRACTISING THE ADVENTURE TOURISM – AN OPPORTUNITY OF ATTRACTING TOURISTS IN DAMBOVITA COUNTY

(Violeta-Andreea Andreiana, Maria-Cristina Stefan, Dragos Panagoret) / 95

SECTION B – Chemistry

1. POLYPHENOLS ISOLATION AND DETERMINATION IN GRAPE SEEDS BY HPLC/DAD

(Gabriela Stanciu, Simona Lupsor, Antoanela Popescu, Ioana Adina Oancea) / 107

2. DISCOVERING THE BENEFITS OF SOME BIO-ACTIVE COMPOUNDS FROM ORGANIC COSMETICS USING MARKETING & PR

(Ioana Adina Oancea, Tiberius Stanciu, Adriana Barbu, Andreea Vlad) / 113

3. THERMAL AND RADIATION STABILITY OF ALKYD BASED COATINGS USED AS INSULATORS IN THE ELECTRICAL ROTATING MACHINES

(Marius Bumbac, Traian Zaharescu, Cristina Mihaela Nicolescu) / 119

4. MICROSTRUCTURE AND MECHANICAL PROPERTIES OF Al-Cd BINARY ALUMINIUM ALLOY

(B. Tyouke, M. Larouech, Y. Tamraoui, E. Saad) / 131

5. QUANITITATIVE ANALYSIS OF PYRETHRINS FROM CHRYSANTHEMUM CINERARIIAEFOLIUM AND CHRYSANTHEMUM LEUCANTEUM PETALS

(Gabriela Stanciu, Simona Lupsor, Rodica Sirbu) / 141

6. CONSIDERATIONS RELATED TO THE SECONDARY SCHOOL STUDENTS’ INTEREST FOR A SCIENTIFIC CAREER

(Gabriel Gorghiu, Elena Ancuta Santi) / 147

7. DIGITAL RESOURCES DESIGNED FOR INCREASING THE ROMANIAN STUDENTS’ INTEREST FOR NANOSCIENCE AND NANOTECHNOLOGY

(Laura Monica Gorghiu, Gabriel Gorghiu, Ana Maria Aurelia Petrescu) / 155

SECTION C – Physics

1. A STUDY OF NUCLEAR STRUCTURE FOR  ISOTOPE BY USING IBM-1 MODEL

(Alya'a Abdulkadhim) / 163

2. X-RAY DIFFRACTION STUDY OF THE CRYSTAL STRUCTURE OF HASTELLOY C2000 BETWEEN 700°C AND 1000°C

(A. Amri, O. Benlenda, L. Zerrouk, M. Rattal, A. Ibnlfassi, E. Saad) / 177

3. SOME NEW EXACT SOLUTIONS OF A THREE-DIMENSIONAL KUDRYASHOV–SINELSHCHIKOV EQUATION IN THE BUBBLY LIQUID

(Kamran Ayub, Muhammad Yaqub Khan, Qazi Mahmood Ul Hassan) / 183

4. UNSTEADY MHD FLOW PAST AN IMPULSIVELY STARTED OSCILLATING VERTICAL PLATE WITH CONSTANT WALL TEMPERATURE AND VARIABLE MASS DIFFUSION IN THE PRESENCE OF HALL CURRENT

(U. S. Rajput, Neetu Kanaujia) / 195