JOSA year 12 no. 4 (21)
eISSN 2068-3049

CONTENTS

SECTION A – Mathematics

1. PROVING SOME GEOMETRIC IDENTITIES BY USING THE DETERMINANTS

(Dam Van Nhi) / 385

2. CHARACTERIZATION OF PARALLEL SURFACES TO SURFACES IN HEISENBERG GROUP HEIS³

(Talat Körpinar, Essin Turhan) / 395

3. APPLICATION OF TOTAL LEAST SQUARES TO A LINEAR SURVEYING NETWORK

(Onuwa Okwuashi, Aniekan Eyoh) / 401

4. GENERAL EXISTENCE FOR MINIMUM PROBLEMS IN BANACH SPACES

(Silviu Sburlan) / 405

5. ON A CLASS OF POSITIVE LINEAR OPERATORS

(Bramha Dutta Pandey, B. Kunwar) / 411

6. A TRIGONOMETRIC METHOD OF SOLVING THE HADWIGER- FINSLER INEQUALITY IN ACUTE TRIANGLE

(Mihály Bencze, Marius Dragan) / 421

7. NEW GENERALIZATIONS AND NEW APPLICATIONS FOR NESBITT'S INEQUALITY

(Dumitru M. Batinetu-Giurgiu, Neculai Stanciu) / 425

8. q-FRACTIONAL INITIAL VALUE PROBLEMS AND q-ANALOGUE OF GENERALIZED MITTAG-LEFFLER FUNCTION

(Kishan Sharma) / 431

SECTION B – Chemistry

1. LEAD AS A TOXIC WATER CONTAMINANT – HEALTH EFFECTS AND METHODS OF ANALYSIS

(Pandurang Narayan Patil) / 439

2. CHARACTERIZATION OF THE MAGNETIC THIN MULTI-LAYERS WITH VIBRATING SAMPLE MAGNETOMETER

(Cosmin Cobianu, Mihail-Florin Stan, Elena-Otilia Virjoghe, Nicolae Fidel) / 451

3. ASSESSMENT OF HEAVY METALS CONTENT OF CRUDE OIL CONTAMINATED SOIL

(Cristiana Radulescu, Claudia Stihi, Ion V. Popescu, Lucica Grigora Toma, Elena Daniela Chelarescu, Raluca Stirbescu) / 459

4. RANKING CHEMISTRY JOURNALS USING THE HIRSCH INDEX AND ARTICLE INFLUENCE SCORE

(Silviu Jipa, Laura Monica Gorghiu, Crinela Dumitrescu, Calin Oros) / 469

SECTION C – Physics

1. THE EFFECTS OF INTRODUCTION PHYSICS/ASTRONOMY CLUB IN SECONDARY SCHOOLS IN STIMULATING TEACHING AND LEARNING OF PHYSICS IN ONITSHA SOUTH LOCAL GOVERNMENT AREA

(Chinenye M. Oboshi, C. Onuchukwu) / 477

2. NUMERICAL DETERMINATION OF ELECTRIC FIELD AROUND A HIGH VOLTAGE ELECTRICAL OVERHEAD LINE

(Elena Otilia Virjoghe, Diana Enescu, Mihail-Florin Stan, Cosmin Cobianu) / 487

3. ENVIRONMENTAL RESEARCHES - A WAY OF GUIDING HIGH SCHOOL STUDENTS TO SCIENTIFIC RESEARCH

(Gabriel State, Claudia Stihi, Camelia State) / 497

3. THE CHALLENGING CONCEPT OF DISPLACEMENT IN BASIC CLASSICAL MECHANICS

(Mehdi Jafari Matehkolaee, Amir Hossein Tabarraei) / 501