This paper presents a modified nine switch inverter with two inputs and two Zsource networks. This inverter has two DC inputs and two AC outputs. Input DC voltages can be boosted to the required level. Amplitude, frequency and phase of AC output voltages can be controlled, independently. The proposed converter can be used in applications with two unregulated DC sources, which require feeding two independent loads. Compared to the conventional structure, the proposed converter requires reduced number of semiconductor switches hence improved converter reliability and less volume. While the authors have already presented a similar inverter (single z-source network DUAL-input DUAL-output inverter) with the above features, new inverter has some differences in the topology, control strategy and operation. In this paper, a new control strategy of space vector modulation for the new inverter is proposed. Also a new switching method utilizing carrier-based modulation concept is presented for both DUAL (proposed) and single z-source network DUAL-input DUAL-output inverters. Performance of the proposed inverter is verified by simulation and experimental results.

Background and Aim: Cementation is one of the most critical steps of the porcelain restoration technique. However, limited information is available concerning the bond strength of current ceramic bonding systems. The aim of this study was to evaluate the shear bond strength of three DUAL-cure resin cements to IPS-Empress2 ceramics. Materials and Methods: In this experimental study, 30 pairs of IPS-Empress 2 ceramic discs were fabricated with 10 and 8 mm diameters and 2.5 mm thickness. After sandblasting and ultrasonic cleaning, the surfaces of all specimens were etched with 9% hydrofluoric acid for 60 seconds. Then, the three groups of 10 bonded specimens were prepared ceramic bonding resin systems including Panavia F2, Variolink II and Rely X ARC. After storage in 37±1o c water for 24 hours and thermocycling in 5o c and 55o c water for 500 cycles with 1-minute dwell time, the shear bond strengths were determined using Instron machine at speed of 0.5mm/min. Data were analyzed by One Way ANOVA test. For multiple paired comparisons, the Tukey HSD method was used. The mode of failure was evaluated by scanning electro microscope (SEM). P<0.05 was considered as the limit of significance. Result: Significant differences were found between different cement types (P<0.05). Variolink II provided the highest bonding values with IPS-Empress2. A combination of different modes of failure was observed. Conclusion: Based on the results of this study, according to the highest mode of cohesive failure, Variolink II seems to have the strongest bond with IPS-Empress2 ceramics.

Background: Nonunions with large defect is a problem, especially in large defects with infection this problem is more serious. Due to war and grave accidents in our country, we have encountered with these difficulties and in future time will also.Methods: We modified D.O.B.G by using plate in one side of large defect and metal plate on another side, and fixed these plates using screws anchoring the distal and proximal segments of nonunion sites rigidly. The technique is very simple, reliable, less morbidity in donor site, short operation time and needn's especial instruments and equipments. We use this technique in 146 patients and follow one hundred of thems for 2.5 yrs (mean time) clinically and radiological.Results: Union rate was ninety percent. Due to rigid fixation and early R.O.M of joints the final limbs function were excellent (comparison with others technique).Discussion: Modified D.O.B.G is the choice technique for nonunion with lange defect especially in metaphysis. because of rigid fixation results early R.O.M and good limb function, high union rate, short operation time, simple technique and less morbidity in donor site.

Background: Considering the high prevalence of congenital hypothyroidism (CH) in Isfahan and its different etiologies comparing with other countries, the high rate of parental consanguinity and the role of DUOX2 gene in transient CH and permanent CH due to dyshormonogenesis, the aim of this research was to investigate the mutations of DUOX2 gene in patients with transient or permanent CH due to dyshormonogenesis.Methods: In this descriptive prospective study, patients diagnosed with transient CH and permanent CH due to dyshormonogenesis during CH screening program, were selected. Venous blood sample was obtained to determine the 3 mutations Q36H, R376W, D506N of DUOX2 gene using Real-time PCR HRM method by specific primers and complementary molecular methods such as Sequencing.Findings: In this study 25 and 33 CH patients with transient CH and permanent CH due to dyshormonogenesis were studied respectively. 30 children studied as control group. We did not find any mutation of the mentioned three mutations of DUOX2 gene.Conclusion: Considering the findings of current study, it seems that further studies with other methods and also with considering other gene mutations such as pendrin, NIS and thyroglobulin is needed for more accurate conclusion.

This paper presents a compact printed DUAL-band DUAL-polarized slot antenna. The antenna is comprised of three main sections: coupled-fed, two cells of complementary capacitively-loaded loop-inspired metamaterial (CCLL-MTMs), and a slot with an overall size of 29. 4×39. 2 mm2. It is shown that the CCLL-MTM structure exhibits a magneto-dielectric behavior with an effective lowfrequency epsilon-negative (ENG) medium. The effective ENG material leads to a miniature printed slot antenna and a low-frequency band of 1900 MHz has been achieved. At the higher frequencies, it behaves as a magnetic material, which helps to match the antenna through a broadband frequency range. An operating band of 4750 to 5730 MHz is observed. The electric field of resonating CCLLMTM cells and the original slot are perpendiculars, thus each band supports only a single horizontal/vertical polarization. In order to validate the simulation results, a prototype of the antenna is fabricated and tested. Good agreement between the simulation and measurement results is obtained.

This paper is an investigation ofL-DUAL frames with respect to a function-valued inner product, the so calledL-bracket product on L2(G), where G is a locally compact abelian group with a uniform latticeL. We show that several well known theorems for DUAL frames and DUAL Riesz bases in a Hilbert space remain valid forL-DUAL frames and L-DUAL Riesz bases in L2(G).

Background: The aim of this study is to explore the safety and diagnostic performance of DUAL-source CT scan in comparison with single source CT scan and conventional angiography in patients with coronary heart diseases.Materials and methods: A systematic review was performed using CRD standard methods. The Cochrane Library, MEDLINE, EMBASE, Google Scholar and TRIP were searched up to April 2009. The references of the marked studies and gray literature were also searched.Results: 17 articles were included. 9 articles reported the safety and 12 articles reported the diagnostic performance of DSCT.  Generally DSCT was a non-invasive and safe procedure.  Using DSCT the exposure of patient to X-ray was less than 64-slice single source CT (SSCT) and more than conventional angiography. For the DSCT the mean sensitivity was 90.4%, mean specificity was 82%, mean PPV was 83% and mean NPV was 96%. For the SSCT the mean sensitivity was 90.4%, mean specificity was 82%, mean PPV was 83% and mean NPV was 96%. The mean sensitivity, specificity, PPV and NPV of DSCT were slightly higher than SSCT.Conclusion: DSCT is a noninvasive and relatively safe technology. The diagnostic performance of DSCT is higher than SSCT, but its performance is not so much high to be able to substitute the conventional invasive angiography which is still the gold standard test.

In this paper, by considering the notions of DUAL right and DUAL left stabilizers in bounded BCK-algebras, we obtain some related results. After that we investigate the relationship between the DUAL left (right) stabilizers and DUAL ideals in bounded BCK-algebras. Then we define a class of special bounded BCK-algebras called DUAL normal BCK-algebras. Finally we prove that the DUAL semisimple bounded BCK-algebras and DUAL J-semisimple bounded BCK-algebras are all DUAL normals.