Lift Technique Research Articles

Temporal Incision Super-high Superficial Musculoaponeurotic System Face Lift for Chinese Patients.

This investigation assessed patient satisfaction with a temporal incision technique using a super-high superficial musculoaponeurotic system (SMAS) flap for midface lifting in a Chinese patient cohort. From July 2019 to July 2023, 95 patients underwent midface lifts via a temporal incision approach at our institution. The extent of SMAS flap dissection spanned 2 cm above the outer canthus, to the lower margin of the zygomatic arch inferiorly, and medially to the zygomaticus major muscle. The technique involved anchoring the elevated SMAS flap to the deep temporal fascia to elevate the malar fat pads, correct sagging tissues, and ameliorate the appearance of nasolabial folds. Among the 95 patients, 61 completed a follow-up ranging from 6 months to 2 years postsurgery, with a majority reporting satisfaction with the aesthetic results of their midface lift. No significant complications, including permanent facial nerve injury, were reported. The temporal incision super-high SMAS face lift technique demonstrated high patient satisfaction and clinical effectiveness in improving the appearance of nasolabial fold and midface aesthetics. However, the success of this technique hinges on a comprehensive understanding of facial anatomy due to the confined operative field, highlighting its technical demands and the need for surgical expertise.

Complications and risk factors associated with zygomatic implants: retrospective analysis with 73 consecutive patients followed for 3.5 years.

This retrospective study analyzed zygomatic implant (ZI) survival and implant success (based on ORIS criteria) in patients treated for maxilla atrophy or after reconstruction failure. Implants were placed as quads (4 ZIs) or hybrids (ZIs and conventional implants in premaxilla) in edentulous patients using various surgical approaches, evolving from the sinus slot to Chow's extended sinus lift technique with or without Bichat fat pad. The procedure was followed by immediate loading, while clinical and radiographic evaluations spanned at least 1 year after implantation. The primary outcome was the implant survival at follow-up, and the secondary was the implant success, assessed as complications according to ORIS criteria: prosthetic offset, sinus status, peri-implant soft tissue health, and implant stability. A total of 73 consecutive patients, treated with 217 ZIs and 76 conventional implants, were included, with mean follow-up of 3.5 years (range, 1-9.8 years). Four ZIs failed in 3 patients, including 1 patient with a zygomatic bone fracture. The cumulative survival rate was 98.16%. Although in 2 additional cases, implants lost stability, they achieved delayed osseointegration. Other complications included 21 sinus reactions (excluding the 4 failures) and 28 peri-implant inflammatory reactions. ZIs offered a predictable treatment option for extreme upper jawbone atrophy with a relatively low complication rate and no severe injuries. The Chow technique with the Bichat fat pad positively impacted ZI success and survival, whereas smoking, implantation in fresh sockets, and the limited experience of the surgeon negatively affected the outcomes.

Our 40 Years' Experience on Face and Neck Lift Procedures with High-SMAS Flap Techniques: How to Manage Secondary and Tertiary Surgeries.

Facial aging drives a growing demand for esthetic procedures, with nonsurgical options often falling short in longevity compared to surgery. Despite primary face and neck lift techniques receiving substantial attention, revision procedures have been relatively overlooked in terms of their unique surgical management, complication incidence, and preventive strategies. The authors present a 40-year experience with revision face and neck lifts, comprising 283 cases. The primary focus was on the high-SMAS flap technique in revision surgeries, with data collected on complications compared to primary procedures and existing literature. Secondary analysis investigated the time-lapse between primary and revision surgeries in the author's series (secondary and tertiary rhytidectomy) compared to the literature findings. Out of 283 cases, 232 were secondary and 51 were tertiary procedures. Overall complication rates in secondary cases mirrored those of primary procedures, with no statistically significant difference observed (p > 0.05). The mean interval between procedures was 9.0years (range: 3.4-28.8years), with a significant statistical difference (p < 0.05) observed between the first and second procedures (10.7years, range: 3.8-18.8years) and the second and third procedures (7.8years, range: 3.5-10.8years). Results indicate that high-SMAS flaps yield consistent and satisfying outcomes, even in secondary and tertiary cases. Complication rates are comparable to primary surgeries, underscoring the importance of meticulous attention to detail in managing the complexities associated with previous surgeries and the aging process. This 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 .

Implementation of fuzzy logic controller for positive output LUO converter

This paper describes the fuzzy logic controller (FLC) for a positive output LUO converter (POLC), which uses a voltage controller to achieve the output voltage regulation. The fourth-order POLC DC–DC converter produces positive output voltage utilizing the voltage lift technique. Due to the converter’s switching functions and its inherently time-varying nature, it exhibits a highly nonlinear dynamic response. To enhance the dynamic performance of the converter, controllers are designed using small signal model and frequency response analysis. The closed loop is used to evaluate converter performance in the presence of variations in reference voltage, source voltage and load disturbances. The power loss analysis of the converter is performed. The comparative results show that FLC gives good dynamic response for wide range of variations than the proportional–integral (PI) controller. The prototype model is built using dsPIC (30F4011) microcontroller, and the experimental results are presented to validate the simulation results.

Effectiveness of Intercostal Stretch Technique on Pulmonary Conditions: A Narrative Review

Background: The Intercostal Stretch Technique is one of the physiotherapy techniques that is used to solve different respiratory problems. It is used for increasing chest expansion and diaphragm excursion improvement and also intra-thoracic lung volume. Aim: The study aims to evaluate the effectiveness of the intercostal stretch technique. Methodology: A narrative review. In this study, an RCT study was used to review the intervention. Results: Several articles are used to discuss the effectiveness of the intercostal stretch technique. In stable COPD, diaphragmatic breathing and the intercostal stretch technique both work equally well to improve chest expansion and functional capacity while lowering dyspnea. Research has shown that IC stretch outperforms the anterior basal lift technique in lowering heart and respiratory rates while increasing oxygen saturation. According to this study, IC stretching in conjunction with breathing control may improve dynamic lung parameters, particularly FEV1/FVC%, more than breathing control alone. Patients with COPD have an increased functional exercise capacity and reduced dyspnea when aerobic training and respiratory muscle stretching are combined. Conclusion: Different articles demonstrated that IC stretch improved lung function, expired tidal volume, decreased dyspnea, and increased chest expansion.

Fixation of Superolateral Platysma Flap to the Mastoid Fascia: A Novel Isolated Neck Lift Technique.

This study aimed to evaluate the utility of a novel neck lift technique based on fixation of superolateral platysma flap to the mastoid fascia in terms of postoperative aesthetic outcome and patient satisfaction within an 18-month follow-up period. A total of 145 female patients who underwent isolated neck lift operation with the superolateral platysma flap technique were included. Global Aesthetic Improvement Scale (GAIS) scores (by the investigator) and the patient reported outcomes were recorded in terms of improvement in the cervicofacial angle, jowls, platysmal bands and malpositioned cervical fats, at 6 and 18 months, postoperatively. The complications were recorded at early postoperative period and at 1, 6 and 18 months, postoperatively. The median duration of follow-up was 18 months (range, 6-48months). GAIS scores at 18th months, revealed exceptional improvement in the cervicofacial angle (82.8%), the jowls (93.1%), platysmal bands (93.1%) and malpositioned cervical fat (97.2%). Majority of patients were very satisfied with the treatment in terms of the aesthetic improvement. Complications involved the minor ecchymosis (17.2%) and minor skin circulatory problem (11.7%) in the early postoperative period, suture exposure (12.4%) in the postoperative 1st month, and cervical band reformation in the 6th (0.7%) and 18th (1.4%) months. In conclusion, lateral displacement and fixation of superolateral platysma flap to the mastoid fascia seems to be a useful neck lift technique for correction of platysma- and skin-derived aging sings with minor and manageable complications, immediate return to everyday activities and a high patient satisfaction. This 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 .

Brow lift practice in receding hairlines: A retrospective comparison of brow lift techniques

IntroductionAssessing facial aesthetic surgery outcomes often relies on expert opinion, which inherently introduces bias. This study examines the use of artificial intelligence (AI) to objectively compare novel and standard brow lift techniques. MethodsFifty-nine patients underwent brow lift surgery between 2006 and 2020 and were divided into two groups: Group A (n=47) underwent a standard brow lift, while Group B (n=12) received our novel technique. Patients were excluded if they underwent a simultaneous rhytidectomy or if their images were unreadable by the software. AI analysis examined emotion and action unit functioning, and then was correlated to manual measurements of brow position. ResultsGroup A demonstrated an increase in happiness from 1.6% to 9.5% (p=0.004), a decrease in sadness from 14.9% to 8.0% (p=0.06), and a decrease in anger from 14.8% to 5.7% (p=0.007). Group B experienced an increase in happiness from 5.2% to 12.6% (p=0.18), a decrease in sadness from 18.9% to 10.3% (p=0.1), and a decrease in anger from 26.4% to 10.9% (p=0.07). Group A exhibited elevation in brow position by 2.3-3.7mm (p<0.05) and a decrease in brow lowerer action unit functioning from 17.8% to 3.8% (p=0.0005). Group B exhibited elevation in brow position by 2.78-5.05mm (p<0.05) and a decrease in brow lowerer action unit functioning from 35% to 8.4% (p=0.011). ConclusionThis study demonstrated similar efficacy of the examined brow lift techniques for causing positive emotional changing while elevating the brow. This objective comparison demonstrates the utility of artificial intelligence in assessing facial surgery.

Optimizing gas lift for enhanced recovery in the Asmari formation: a case study of Abu Ghirab field in Southeastern Iraq

The gas lift technique applies gas bubble injection into the vertical wells to raise production. Gas and liquid rates, shifts in flow regimes, and system equilibrium influence this process. This study explores the efficient implementation of gas lift techniques to maximize production from the Asmari Formation in the Abu Ghirab Field, southeastern Iraq, using a continuous gas lift for maximum production rate by PIPESIM TM software. The results of the gas lift design for the four wells (AGCS-33, 26, 28, and 36) show that the Vogel method provided the best results for the gas lift design, and faults and facies distribution impact the gas lift injection and oil production rates. These will become evident with wells AGCS-33 and 36 as their proximity to faults will increase oil production rates with a gas injection rate limit of 7 MMSCF/d. Conversely, for wells 26 and 28, the limit will marginally rise, starting at 5 MMSCF/d. In addition, the effect of gas lift is clearly in the middle western of the crest, which shows an increasing percentage of oil production of 136.6% at minimum rate and 198.5% at maximum for the well AGCS-26, 89.7% and 105.7% for the well AGCS-36. Wellhead pressure has a significant impact on gas-lift performance, and improving gas-lift efficiency can be accomplished using an electric control valve. The feasibility of implementing gas lift in the Asmari Formation depends on the water cut, well location, and water saturation distribution within the Formation.

Advancements in lip augmentation: A scoping review exploring novel techniques.

Lip augmentation is among the most popular cosmetic procedures done today. Advancements in trustworthy techniques have made it feasible to alter the visual characteristics of the lips through the utilization of various injectable substances and surgical procedures. However, there is a lack of standardization in these techniques. The purpose of this review is to focus on novel dermal filler injection and surgical techniques for lip augmentation. We did a scoping review of the literature using PubMed, Embase, and the Google Scholar database to identify all original articles published up to June 2023, assessing new techniques that focus on lip augmentation. In our review, only two studies out of seven included studies were surgical whereas the other five studies were non-surgical. This suggests that injection of dermal fillers is currently the most opted technique performed. This review suggests that incorporating perioral rejuvenation into the plan for lower facial surgery can help to complete the youthful look sought by patients. Injectable fillers provide excellent but short-term benefits and additional options such as Modified upper lip lift and French kiss techniques exist that offer the patient permanent improvements at a low cost.

An Enhanced Voltage Gain Techniques in Quadratic Boost Converters - A Systematic Review

High voltage gain non-isolated boost DC-DC converters are widely employed in applications such as hybrid electric vehicles, aircraft power supplies, photovoltaic (PV) systems and fuel cells (FC) applications. The use of conventional boost converters in high-gain applications is affected by their practical limitation on their voltage gain. Several boost converter topologies based on different voltage lift techniques have been studied and reported; them is quadratic boost converter (QBC). These converters have recently emerged as an interesting topology because of the quadratic nature of their voltage gain, simple among structure and simple control scheme. Recently modified topologies of QBC employing different voltage lift techniques aimed at further enhancing their performance are reported. This paper is aimed at presenting a review on the advances in quadratic boost converters topologies. In this article, QBC are categorized into five groups: magnetically coupled based on coupled-inductor (CI), switch-inductor (SI), switch-inductor switch-capacitor (SC-SI), switch-capacitor (SC), and soft-switching QBC. Furthermore, the paper makes a comprehensive comparison of various QBC in terms of voltage conversion ratio, total component count, input current ripples and voltage stress across switching devices.

Anatomical perspectives of brow-lifting using threads: Clinical cases with techniques.

Tailoring surgical interventions to target age-related transformations is paramount. Many candidates seeking blepharoplasty commonly exhibit eyebrow ptosis, underscoring the necessity for surgeons to possess a comprehensive understanding of techniques for brow and forehead rejuvenation. Various surgical techniques are available for eyebrow and forehead enhancement, contrasting the standardized approaches in upper and lower blepharoplasty. Thread lifting has gained popularity for forehead lifting, although a more precise term would be eyebrow lifting. The thread lifting methods using V and I techniques with floating-type threads (Secret Line, Hyundai Meditech., Inc., Wonju-si, Republic of Korea) are used. The natural aging process often causes the forehead and eyebrows to sag under the influence of gravity, leading to the appearance of heavy eyelids. Elevating the eyebrows can mitigate droopiness, enhance vision clarity, and rejuvenate the facial aesthetic. While non-surgical methods like Botulinum Toxin A can weaken muscles and potentially aid in brow elevation, their visible effects may be somewhat constrained. Surgical methods encompass endoscopic forehead lift, eyebrow lift techniques, and scalp excision-based forehead reduction surgery, each with specific advantages and drawbacks. Thread lifting bridges the gap between surgical and non-surgical modalities. Forehead areas often lack subcutaneous fat, requiring precise anatomical understanding for effective thread lifting. Cannula usage with partial tunneling ensures efficacy even in patients with strong adhesions. Presented cases showcase successful eyebrow lifting using cog threads, illustrating immediate and gradual post-procedure changes. Eyebrow thread lifting demands periodic procedures, offering subtler improvements than surgery. Anatomical knowledge is crucial, and the technique presents discomfort. Effects last about 6 months, requiring re-treatment as effects regress. Thread lifting, a middle ground between surgical and non-surgical methods, can rejuvenate brows with less downtime.

Antral membrane balloon technique versus Densah bur in crestal sinus lift with simultaneous implant placement: a randomized clinical trial

BackgroundThe posterior maxilla presents challenges for implant insertion because of the poor bone quality as well as the loss of vertical bone height. Indirect transcrestal sinus lift techniques are advised when a few millimeters of additional height are needed. This study aimed to evaluate the clinical and radiographic outcomes of antral membrane balloon technique versus Densah burs for transcrestal maxillary sinus lifting with simultaneous implant placement.Materials and methodsThis randomized clinical trial was conducted on 22 patients received 32 dental implants for replacement of missed maxillary posterior teeth after crestal maxillary sinus lifting. The patients were randomly divided into two groups. Group 1, patients underwent crestal sinus floor elevation with simultaneous implant placement using antral membrane balloon technique. Group 2, patients underwent crestal sinus floor elevation with simultaneous implant placement using Densah burs. Patients were evaluated clinically and radiographically using cone beam computed tomography (CBCT) at regular time intervals immediately, 6 months and 12 months after surgery. All clinical and radiographic parameters were statistically analyzed.ResultsAll dental implants were successful for 12 months of follow up. Regarding implant primary stability, there was a statistical significant difference between the study groups in favor of Densah group (P = 0.004), while there was no significant difference after 6 months (P = 0.07). Radiographically, balloon group showed a statistically significant immediate postoperative vertical bone height (P < 0.0001), and significant reduction in vertical bone height after 6 months (P < 0.0001). Densah group showed significant increase in bone density (P ≤ 0.05).ConclusionBoth techniques demonstrated successful clinical and radiographic outcomes for crestal sinus lift. The antral membrane balloon group demonstrated better immediate postoperative vertical bone gain, while Densah burs had higher implant primary stability and bone density.Trial registrationThis study was registered in Clinical-Trials.gov PRS (https://register.clinicaltrials.gov) under identification number NCT05922592 on 28/06/2023.

Gas Lift Optimization for Zubair Oil Field Using Genetic Algorithm-Based Numerical Simulation: Feasibility Study

The gas-lift method is crucial for maintaining oil production, particularly from an established field when the natural energy of the reservoirs is depleted. To maximize oil production, a major field's gas injection rate must be distributed as efficiently as possible across its gas-lift network system. Common gas-lift optimization techniques may lose their effectiveness and become unable to replicate the gas-lift optimum in a large network system due to problems with multi-objective, multi-constrained &amp; restricted gas injection rate distribution. The main objective of the research is to determine the possibility of using the genetic algorithm (GA) technique to achieve the optimum distribution for the continuous gas-lift injection flows in the structure of the network of Zubair, oil field with 10 gas-lift injected wells. This will be done through numerical simulation and modeling studies. The overall enhancement of the filed production rate is found to have increased from 15767 STB/day to 19847 STB/day. The well's reservoir pressure and water cut sensitivity studies are carried out to study the possible impacts of these elements upon the well and its efficiency through the course of the field. Our understanding of the potential benefits of utilizing gas lift techniques in a field from a technical and economical point of view is deepened by the use of examples from economic analysis. Furthermore, even though the idea of employing GA in this manner is not new, this work discusses GA-based optimization methodologies for increasing the oil production rate by using gas lifting in a Zubair oilfield. In order to assign gas injection rates to specific wells in a network throughout the field using limited gas injection rates, the model for optimization will be laid out step-by-step making it simple to understand and employ as a guide, especially for the front-line production technicians involved in the development and design of gas-lift systems.

Enhancing energy efficiency in power looms: utilizing regression machine learning for electrokinetic energy assessment

This study focuses on optimizing electro-kinetic energy utilization in textile weaving units, addressing power interruptions, reducing electrical costs, and harnessing latent kinetic energy during the weaving process. Power looms, vital to textile production, often incur inefficiencies and increased operational costs due to underutilized kinetic energy. To address these challenges, three innovative electrokinetic energy harvesting approaches are proposed: the Modified Series-Parallel Piezo Matrix, bi-directional linear generation, and uni-directional non-linear power extraction methods. The research further incorporates the Super Lift and Ultra Lift DC-DC power conversion techniques to enhance energy efficiency. The Modified Series-Parallel Piezo Array integrates Piezoelectric elements to capture and convert discarded kinetic energy efficiently. The bi-directional linear generation method captures mechanical energy from both forward and backward movements in weaving, minimizing energy wastage. The uni-directional non-linear power extraction method optimizes energy recovery by targeting specific weaving cycle phases. Machine learning algorithms, including Gaussian Process Regression, Linear Regression, Neural Network, and Support Vector Machine, enable precise energy estimation for meticulous modeling and optimization. Rigorous validation through MATLAB simulations aims to bolster energy efficiency, trim operational costs, and promote sustainable energy practices in the textile industry, contributing to a more environmentally friendly and sustainable future for the sector.

INCREASING THE WORKING CAPACITY OF THE SUCKER ROD PUMP

The downhole pressure in many oil reservoirs across the world is insufficient to force the created fumes to the surface. Pumps are utilized to artificially lift the fluids in order to manufacture these fluids. Artificial lift techniques are used to generate oil from more than 70% of all active wells. Sucker rod pumps are among the most often used artificial lift techniques. As a well-respected technology in the oil and gas sector, sucker rod pumps are inexpensive to buy and operate, simple to use, and widely available. Numerous technological developments have been used to enhance the performance, applicability, and diagnostics of sucker rod pumps. With these developments, it's critical to be able to consistently offer an updated assessment and usage manual for the sucker rod-operated pumps. This study offers a current, thorough analysis of the parts of sucker rod pumps, diagnostic techniques, mathematical models, and typical field failures along with advice on how to reduce and prevent them. A new classification of all techniques that may be included in the sucker rod pump technology has been created, based on the review that was done and the newly released sucker rod pump techniques in the industry. This study also discusses a number of field case studies from wells all around the world to highlight some of the key characteristics of sucker rod pumps. Lastly, based on the revised evaluation, the benefits and drawbacks of sucker rod pumps are discussed. The results of this investigation can contribute to a deeper comprehension of the various sucker rod pumps and offer a comprehensive perspective on the sucker rod pump, including its characteristics and modeling. Keywords: sucker rod pumps, failures of sucker rods and their remedies, structure optimization.

Experimental investigation of the effect of variable valve lift on combustion stability and exhaust emissions in a diesel/methane CRDI engine

Diesel/methane combustion still encounters challenges in terms of lower combustion stability and elevated levels of HC and CO emissions. The valve lift (VL) technique is a method that contributes to increased in-cylinder volumetric efficiency, thereby improving engine performance and reducing emissions. Hence, the application of VL in diesel/methane operations would be highly significant. Therefore, an experimental study on the VL for reducing HC and CO emissions and enhancing combustion stability in a diesel/methane CRDI engine was performed at varying methane fractions and torques. In the study, three different cam profiles were used with VL extrapolated using Fourier series and designed: the original VL of 4.46 mm, as well as two different VLs of 4.0 mm and 4.9 mm. The methane in the total fuel energy was initially increased to 20 % and later further increased to 40 %. The experimental findings demonstrated that the augmented VL mitigated the prolonged ignition delay caused by the increase of methane fraction, thereby ensuring enhanced combustion stability across all torques. On the other hand, in diesel/methane operation, increasing the VL resulted in maximum reductions of approximately 17 % in HC, 6 % in CO emissions, and 75 % in smoke opacity.

Body Lift with Lateral Thigh Lift: Surgical Technique and Comparison with the Inferior Body Lift.

Despite its rarity, cutaneous adipose tissue excess in the trochanteric region following massive weight loss is a surgical challenge. The aim of this work is to propose a surgical technique for lifting the outer thighs by describing its indications and its limitations. Seventy-four patients were recruited into the study between 2018 and 2021. Two groups were identified: patients with body lift combined with lateral thigh lift ( n = 20) and patients with lower body lift ( n = 54). Satisfaction was determined through the BODY-Q questionnaire. The average operating time was 45 minutes longer when an outer thigh lift was performed. The median length of hospitalization was similar. The complication rate was 26% for the body lift group and 60% for the thigh lift group ( P < 0.01); the most common complication was dehiscence. Data analysis showed that the lateral thigh lift technique did not affect immediate postoperative evolution or hospitalization duration, proving its safety. There was an increase in total complications among patients who underwent the lateral thigh lift. Dehiscence was the most common complication, which can be treated on an outpatient basis. The satisfaction rate was high. Satisfaction was linked to improved quality of life. In the authors' experience, the technique described is an effective means of treating trochanteric deformities. Therapeutic, IV.

Effectiveness of Autologous Platelet Concentrates in the Sinus Lift Surgery: Findings from Systematic Reviews and Meta-Analyses.

Maxillary sinus augmentation is one of the most predictable procedures for the rehabilitation of the posterior maxilla. The current overview aimed to summarize the findings provided by systematic reviews (SRs) and meta-analyses on the effectiveness of autologous platelet concentrates (APCs) in sinus lift and to assess the methodological quality of the included SRs. Three electronic databases have been explored. SRs and meta-analyses addressing the effectiveness of APCs in sinus lift technique were included. Clinical, radiographic and histomorphometric findings were considered for APCs as solely grafting materials and APCs in combination with biomaterials. Outcomes were implant survival rate (ISR), implant stability (IS), implant failure (IF), postoperative complications, histomorphometric findings, radiographic bone gain, bone volume and bone density. The methodological quality of the included SRs was assessed using the updated version of "A Measurement Tool to Assess Systematic Review" (AMSTAR-2). Thirty SRs were included. The methodological quality of the included reviews ranged from critically low (3 studies) to high (9 studies). The included SRs showed favorable clinical outcomes, short-term new bone formation and no biological complications when APCs were used both as solely graft material or in combination with other biomaterials. However, no significant additional effects in the long-term period were observed. APCs did not add any further positive effects compared to the physiological healing derived by the natural blood clot. The current overview of SRs highlighted the need for high-quality SRs evaluating the role of APCs in sinus lift though network meta-analyses, in order to identify the most powerful material for sinus lift augmentation. The use of APCs improves the healing of soft tissues and the postoperative quality of life in the short-term period. Thus, its application can be recommended.

The Detailed Anatomy of the Deep Plane of the Face and Neck with Current Nomenclature.

The fundamental goal of modern face and neck lifting is to enhance and restore a more youthful facial appearance by addressing soft tissue descent. There are variations in described facelift technique including superficial musculoaponeurotic system (SMAS) flaps, composite flaps, deep plane, skin flaps, and subperiosteal facelifts, among others. The term "deep plane rhytidectomy" was originally described by Hamra. This term has since been linked with facelift surgery with recent advances including incision placement, treatments of SMAS-platysma complex, and mastoid crevasse among others. In the lead authors' experience, using deep plane techniques have demonstrated superior facial surgical rejuvenation results with less dependence on ancillary measures such as fat grafting or implantation for midface volumization. In order to successfully perform any face or neck lift, it is key to understand the relationship of the skin, the fat compartments, and the ligamentous attachments. This chapter details the anatomy of the deep plane of the face and neck and explains some nuances as it relates to surgical lifting. We also describe recent anatomical revelations of the mandibular ligament and its management in deep plane face lifting. In this chapter, given this opportunity to share personal experiences and preferences, the authors hope to describe relevant anatomy for the deep plane and provide some clarity on the merits of deep plane face and neck lift technique.

Performance Analysis of Positive Output (P/O) Push-Pull Switched Capacitor Converter for High Power Density Applications

The micro-power-consumption technique requires high power density DC/ DC converters and power supply sources. In this research, a PI and Fuzzy Logic Controllers for an elementary circuit of positive output (P/O) push-pull switched capacitor converter has developed for high power density applications with high sustainability under enormous line and load disturbances. The voltage lift technique is a popular application in electronic circuit design. The power converter performs DC-DC step-up voltage conversion with high efficiency, high power density and cheap topology in a simple structure. The proposed converter combines both switched-capacitor and voltage lift techniques. Referable to the time varying and switching nature of the power electronic converter their dynamic behavior becomes highly nonlinear. Conventional controllers are incapable of providing excellent dynamic performance and hence the fuzzy logic controller can be used as a feed forward controller for controlling power electronic converters. The control algorithm is developed to ensure tracking of the reference voltage and rejection of system disturbances by successive measurements of the converter output voltage at certain time instants within a conduction period. The simulation of PI and Fuzzy logic controls have been carried out using MATLAB/Simulink software to evaluate the controller’s performances. Keywords: Luo converter, DCDC converter, PI Controller, Fuzzy Controller.