Boubakerova shema razvoja po polinomima (BPES) i optička svojstva prskanih slojeva β-SnS2

β-SnS2 layers have been prepared on glass substrates by spray pyrolysis technique at temperature Ts ≈ 270◦C. The transmission-reflectance spectra, subjected to an original BPES-related protocol, led to accurate calculations of the effective absorptivity. The knowledge of lastly obtained values of the thermal diffusivity allowed the determination of the opto-thermal expansivity ψAB as a guide to evaluating the conjoint optical and thermal performances of the as-grown layers.Na staklenoj podlozi priredili smo slojeve β-SnS2 metodom vrućeg prskanja na temperaturi 270◦C. Spektri prolazne i odrazne svjetlosti, izvedeni primjenom nove sheme razvoja po Boubakerovim polinomima, omogućili su točno određivanje efektivne apsorptivnosti. Konačno dobiveni podaci za termalnu difuzivnost omogućili su određivanje opto-termičkog širenja ψAB kao vodilju za određivanje povezanih optičkih i termičkih svojstava svježe pripremljenih slojeva

Boubakerova shema razvoja po polinomima (BPES) i optička svojstva prskanih slojeva β-SnS2

β-SnS2 layers have been prepared on glass substrates by spray pyrolysis technique at temperature Ts ≈ 270◦C. The transmission-reflectance spectra, subjected to an original BPES-related protocol, led to accurate calculations of the effective absorptivity. The knowledge of lastly obtained values of the thermal diffusivity allowed the determination of the opto-thermal expansivity ψAB as a guide to evaluating the conjoint optical and thermal performances of the as-grown layers.Na staklenoj podlozi priredili smo slojeve β-SnS2 metodom vrućeg prskanja na temperaturi 270◦C. Spektri prolazne i odrazne svjetlosti, izvedeni primjenom nove sheme razvoja po Boubakerovim polinomima, omogućili su točno određivanje efektivne apsorptivnosti. Konačno dobiveni podaci za termalnu difuzivnost omogućili su određivanje opto-termičkog širenja ψAB kao vodilju za određivanje povezanih optičkih i termičkih svojstava svježe pripremljenih slojeva

A Numerical Approach for Solving Optimal Control Problems Using the Boubaker Polynomials Expansion Scheme

In this paper, we present a computational method for solving optimal control problems and the controlled Duffing oscillator. This method is based on state parametrization. In fact, the state variable is approximated by Boubaker polynomials with unknown coefficients. The equation of motion, performance index and boundary conditions are converted into some algebraic equations. Thus, an optimal control problem converts to a optimization problem, which can then be solved easily. By this method, the numerical value of the performance index is obtained. Also, the control and state variables can be approximated as functions of time. Convergence of the algorithms is proved. Numerical results are given for several test examples to demonstrate the applicability and efficiency of the method

‘Chemlali Mhassen’: New olive cultivar derived from crossbreeding program in Tunisia with high oil quality and productivity

The new olive cultivar ‘Chemlali Mhassen’ was derived from the autopollination of the Tunisian oil cultivar ‘Chemlali Sfax’. The main morphological differences between the two cultivars were observed on the endocarp (symmetry, position of maximum diameter, apex, base and surface). On the agronomic plan, this cultivar is distinguishable from the original cultivar due to its medium earliness of bearing (4 years), medium alternate bearing (0.44), early ripening, moderate sensitivity to verticillium and its high olive production per tree (7.7 kg). Concerning oil quality, ‘Chemlali Mhassen’ had higher performances than the original cultivar for oleic acid content (70 to 77 %) and lower contents for palmitic acid (9.2 to 11.5 %) and linoleic acid (9.3 to 14.7 %). Similar performances were recorded between the new and the original cultivars for rhizogenesis behavior and pollen compatibility

Axillary Sentinel Lymph Node Biopsy for Breast Cancer and Melanoma Patients after Previous Axillary Surgery: A Systematic Review

Objective: Sentinel lymph node biopsy (SLNB) is a validated staging technique for breast carcinoma. Some women are exposed to have a second SLNB due to breast cancer recurrence or a second neoplasia (breast or other). Due to modi- fied anatomy, it has been claimed that previous axillary surgery represents a contra-indication to SLNB. Our objective was to analyse the literature to assess if a second SLNB is to be recommended or not. Methods: For the present study, we performed a review of all published data during the last 10 years on patients with previous axilla surgery and second SLNB. Results: Our analysis shows that second SLNB is feasible in 70%. Extra-axillary SNs rate (31%) was higher after radical lymph node dissection (ALND) (60% - 84%) than after SLNB alone (14% - 65%). Follow-up and com- plementary ALND following negative and positive second SLNB shows that it is a reliable procedure. Conclusion: The review of literature confirms that SLNB is feasible after previous axillary dissection. Triple technique for SN mapping is the best examination to highlight modified lymphatic anatomy and shows definitively where SLNB must be per- formed. Surgery may be more demanding as patients may have more frequently extra-axillary SN only, like internal mammary nodes. ALND can be avoided when second SLNB harvests negative SNs. These conclusions should however be taken with caution because of the heterogeneity of publications regarding SLNB and surgical technique

Physical investigations on (In2S3)x(In2O3)y and In2S3-xSex thin films processed through In2S3 annealing in air and selenide atmosphere

In2S3-xSex and (In2S3)x(In2O3)y thin films have been prepared on glass substrates using appropriate heat treatments of In evaporatedt hin films. X-ray analysis shows that In thin films which were annealed under sulfur atmosphere at 350°C were mainly formed by In2S3. A heat treatment o fthis binary in air at 400°C during one hour leads to (In2S3)x(In2O3)y ternary material which has a tetragonal structure with a preferred orientation of the crystallites along the (109) direction. Similarly, a heat treatment of In2S3 in selenium atmosphere at 350°C during six hours leads to a new In2S3-xSex ternary material having tetragonal body centered structure with a preferred orientation of the crystallites along the (109) direction.Optical band gap,refractive index and extinction coefficient values of In2S3-xSex and (In2S3)x(In2O3)y thin films have been reached. Moreover, correlations between optical conductivity, XRD, AFM and Urbach energy of such ternary thin films have been discussed. Finally, the recorded formation disparity between the quaternary (In2S3)x(In2O3)y and ternary In2S3-xSex compounds has been discussed in terms of the Simha–Somcynsky and Lattice Compatibility theories