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BackgroundThe thick-skinned nose is still one of the most challenging aspects of rhinoplasty. The possible effects of oral isotretinoin on cosmetic results of rhinoplasty in patients with thick nasal skin have been considered during recent years.MethodsIn this double-blind placebo-controlled clinical trial, 48 cases were divided into two groups randomly. Oral isotretinoin (0.5-mg/kg) was started on the 31st day after surgery and given every other day for 1 month and after that daily for two additional months in the first group. The second group received a placebo in the same form, sequence and interval as the first group. The cosmetic results based on patient satisfaction and ranking by an expert surgeon were compared between the two groups at 3 months, 6 months and 1 year after surgery.ResultsPatient satisfaction and ranking by an expert surgeon in the isotretinoin group at 3 months and 6 months after surgery were significantly better than in the placebo group (p value < 0.05); however, at 12 months after surgery there was no statistically significant difference between the two groups (p value > 0.05).ConclusionThough postoperative use of oral isotretinoin in patients with thick nasal skin accelerates improvement in cosmetic results during the early months after surgery, it does not significantly affect the final cosmetic result 1 year after surgery.Level of Evidence IIThis journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.

Wireless power is one of the new promising technologies for IoT applications. The use of arrays for power transfer to free-moving objects has revolutionized wireless power transmission (WPT) applications. Herein, we present an extendable platform for transmitting power to a moving object receiving power from an array. The transmitter (TX) consists of two overlapping layers of square planar coils rotated 45 degrees to each other to provide the best electromagnetic flux coverage. Each layer consists of four coils to further control the power supply to the small receiver (RX) coil. This overlapping star-shaped array is stimulated automatically by a power amplifier. This smart stimulation can deliver uniform power to the receiver regardless of rotation and misalignment inconsistencies by using the geometry of the transmitter array. Moreover, by changing the direction of the current of each small square component in each array using the flower-shaped current, a receiver coil perpendicular to the transmitter’s plate can obtain power comparable with conventional structures. We use ADS-HFSS simulation to verify the fabrication and measurement results. The proposed transmitter achieves an average of 18.2% power transfer efficiency (PTE) to RX and at 90° angular misalignment, 11.5% PTE, while the conventional structure transfers no power to the perpendicular RX coil. A future application of the transmitter can be the investigation of the neurobehavioral of free-moving animals and brain–machine interface studies in medicine.

The low operating temperature of nanowire gas sensors along with their high surface-to-volume ratio are two factors that make gas sensors more practical. In this paper, the growth of ZnO nanowires on a vertically aligned CNT forest is reported. The utilized method for ZnO growth was a rapid microwave-assisted hydrothermal route, which facilitates low-temperature and ultra-fast fabrication. Organic vapor sensing properties of fabricated samples were studied in response to different alcoholic vapors at a wide operating temperature range of 25 to 300 °C. Enhancement of the gas response was observed with increasing operating temperature. Moreover, the effect of the ZnO nanowire length on organic vapor sensing properties of CNT-ZnO samples was investigated. Results proved that CNT-ZnO samples with long ZnO wires exhibit higher sensitivity to examined analytes. Different length ZnO nanowires were attained via variation of the microwave exposure time and power. Fabrication parameters were selected based on numerous runs. The length of ZnO synthesized at each distinct run was calculated based on SEM micrographs of the samples.

The potential of all‐inorganic halide perovskite‐based memristors as a solution to the limitations of traditional memory systems, particularly in the context of edge computing and next‐generation digital architectures, is investigated. The rapid expansion of data‐driven applications demands more efficient, secure, and scalable memory technologies, prompting this exploration of memristors for their unique resistance‐switching properties. The research aims to address the challenges of data security and processing efficiency by integrating memristors into logic circuits, enabling both memory and logic operations within a single device. The study is structured around the experimental fabrication and characterization of Cs3Bi2I6Br3 perovskite memristors. A simple solution‐processed spin coating method with antisolvent‐assisted crystallization was employed to fabricate the memristor devices. The experimental characterization of memristors, including X‐ray diffraction (XRD) analysis and electrical measurements, confirmed their structural integrity and memristive behavior, with distinct hysteresis loops indicative of nonvolatile memory properties. To analyze the behavior of the memristors in electronic circuits, a Verilog‐A mathematical model was developed, and simulations were conducted using the Cadence Virtuoso Electronic Design Automation (EDA) suite. The Verilog‐A model demonstrates strong agreement with measured results and validates the device's hysteresis behavior. Key findings demonstrate that metal halide perovskite (MHP) memristors exhibit excellent switching characteristics, repeatability, and integration potential with complementary metal‐oxide‐semiconductor (CMOS) technology. These properties make them suitable for implementing various logic gates, such as IMPLY, AND, and OR gates, as well as more complex digital circuits like multiplexers and full adders. The results highlight the feasibility of using these memristors for in‐memory computing, where both data storage and processing occur within the memory cells, significantly enhancing computing efficiency and security. The study concludes that MHP‐based memristors offer a promising path toward more compact, energy‐efficient, and secure computing architectures. As the rapid expansion of data‐driven applications calls for more efficient, secure, and scalable memory technologies, our study addresses these challenges by exploring memristors' unique resistance switching properties. Through both experimental fabrication and computer simulations, we demonstrate the feasibility of using Cs3Bi2I6Br3 perovskite memristors in logic gate designs and complex digital circuits, such as multiplexers and full adders, highlighting their suitability for in‐memory computing systems. Key findings show that metal halide perovskite memristors exhibit excellent switching characteristics, integration potential with CMOS technology, and promise for energy‐efficient, secure, and compact computing systems. The results underscore the relevance of memristor‐based architectures in addressing the limitations of traditional memory systems, especially in high‐density and low‐power applications.

We propose an induction link based on overlapping arrays to eliminate blank spots on the electromagnetic field for moving object applications. We use two arrays of four aligned coils that have a 50% overlap between the two plates. This mechanism compensates for the internal coil power drop at positions in the boundaries between two adjacent external coils. We showed that if these plates are excited, a uniform electromagnetic field is created in the movement direction of the moving object. This uniform electromagnetic field distribution will result in a constant receiving power at all points in the path of the moving internal coil with the same power consumption of one coil excitation. Power delivery to the moving object tolerance reaches 10% at most, while, in non-overlapped scenarios, it is approximately 50%. In addition, according to the theoretical calculations, printed circuit coils (PCB) for the array are designed for maximum efficiency. We found that the change in distance and dimensions of the receiver coil has a linear effect on power and efficiency. Moreover, a Specific Absorption Rate (SAR) simulation was performed for biocompatibility. In this paper, we investigate and record a 68% electrical power efficiency for the fabricated system. The array consists of eight transmitters coils of the same size and shape and a receiver coil at a distance of 4 cm. Furthermore, the fabricated coil has shown improved efficiency compared to similar studies in the literature and introduces a promising structure for bio-test applications.

In thalassemic children, HBV infection is common, thus immunization against HBV will reduce and prevent the rate of infection. The aim of this study was to evaluate the efficacy of HBV immunization and the prevalence of HBV infection in beta-thalassemic children in Tehran. To assess the efficacy of immunization and determine the immune response of children with beta-thalassemia, sera of 99 children who had received three doses (10/20 µg) of recombinant HBV vaccine in months 0, 1, 6, were selected and tested for HBsAg, HBsAb and anti-HBc by ELISA method. Also, these sera were tested for HBV DNA using nested-PCR method. In 99 beta-thalassemic children, 89 (89.9 %) were anti-HBs positive (responders) and 10 (10.1%) anti-HBs negative (non-responders). 3 (3.03%) were anti-HBc positive and 1(1.01%) was HBsAg positive. HBV DNA was not detected in any of them. Our results have revealed that hepatitis B vaccine is highly immunogenic for thalassemic children and particularly well tolerated.