Dynamics around Non-Spherical Symmetric Bodies: I. The case of a spherical body with mass anomaly

The space missions designed to visit small bodies of the Solar System boosted the study of the dynamics around non-spherical bodies. In this vein, we study the dynamics around a class of objects classified by us as Non-Spherical Symmetric Bodies, including contact binaries, triaxial ellipsoids, spherical bodies with a mass anomaly, among others. In the current work, we address the results for a body with a mass anomaly. We apply the pendulum model to obtain the width of the spin-orbit resonances raised by non-asymmetric gravitational terms of the central object. The Poincaré surface of section technique is adopted to confront our analytical results and to study the system’s dynamics by varying the parameters of the central object. We verify the existence of two distinct regions around an object with a mass anomaly: a chaotic inner region that extends beyond the corotation radius and a stable outer region. In the latter, we identify structures remarkably similar to those of the classical restrict and planar 3-body problem in the Poincaré surface of sections, including asymmetric periodic orbits associated with 1:1+p resonances. We apply our results to a Chariklo with a mass anomaly, obtaining that Chariklo rings are probably related to first kind periodic orbits and not with 1:3 spin-orbit resonance, as proposed in the literature. We believe that our work presents the first tools for studying mass anomaly systems.

Odontossecção intermediária em retenção atípica de caninos inferiores

Two lower canines horizontally situated in the anterior mental region were removed. In order to minimize bone loss during teeth extraction it was used an intermediate tooth section technique. Sectioning allows central, crown and apical portions of the tooth to be removed through a not too large opening provided by bone removal.

Anatomical Basis of the Support of Fibula to Tibial Plateau and Its Clinical Significance

BackgroundPartial fibulectomy always was used to treat knee osteoarthritis. The settlement of the nonuniform proximal tibia plateau is clinically defined as the height of the medial tibial platform was lower than that of the lateral side in the medial compartment knee osteoarthritis (KOA). The reason for the unapparent is caused by fibular support on the lateral side. Orthopedic surgeons practiced partial fibulectomy based on the theory of nonuniform settlement, and the effect of reduce pain and improve function in patients with osteoarthritis was significant. However, this hypothesis of nonuniform settlement is still lacking an anatomical basis.MethodsThe P45 section technique was used to focus the distribution of the bone trabeculae on the tibial-fibular region.ResultsThe distribution of the bone trabeculae was uneven in the lateral condyle of the tibia and the head and neck of the fibula. The bone trabeculae with uneven distribution of tibia and fibula in space might form a triangle. The fibula and the posterolateral bone cortex of the shaft of the tibia united to form an arch beam via the tibiofibular joint. In the meantime, a lot of thick and dense trabeculae were present in a longitudinal direction on the tibiofibular arch.ConclusionsThe fibula supports the lateral tibial plateau, but the trabeculae were concentrated on the tibiofibular arch.

Decision support system for customers during availability of trade-credit financing with different pricing situations

This study introduces a decision-making policy for a two-warehouse system with a non-instantaneous deteriorating product for credit facility with demand depending on the product price. Two different selling prices are considered in the deterioration and non-deterioration periods. Shortages are partially considered and dependent on the duration of the arrival of fresh lot. Alternative trade-credit is applied herein, and several situations are investigated in this approach. The optimization problems of the situations are solved using an interval-oriented multi-section technique via interval mathematics and its order relations. Three numerical examples are studied and solved to validate the said problem.

The extraperitoneal French AmbUlatory cesarean section technique leads to improved pain scores and a faster maternal autonomy compared with the intraperitoneal Misgav Ladach technique: A prospective randomized controlled trial

Objective To determine whether the French AmbUlatory Cesarean Section (FAUCS) technique reduces postoperative pain and promotes maternal autonomy compared with the Misgav Ladach cesarean section (MLCS) technique in elective conditions. Study design One hundred pregnant women were randomly, but in a non-blinded manner, assigned to undergo FAUCS or MLCS. The primary outcome was a postoperative mean pain score (PMPS), and secondary outcomes were a combined pain/medication score, time to regain autonomy, surgical duration, calculated blood loss, surgical complications, and neonatal outcome. Results Women in the FAUCS group experienced less pain than those in the MLCS group (PMPS = 1.87 [1.04–2.41] vs. 2.93 [2.46–3.75], respectively; p < 0.001). Six hours after surgery, the combined pain/medication score for FAUCS patients was 33% lower than that for MLCS patients (p < 0.001). FAUCS patients more rapidly regained autonomy, with 94% reaching autonomy within 12 h vs. 4% of MLCS patients (p < 0.001). There were no differences in maternal surgical or neonatal complications between groups. Conclusions Our results indicate that FAUCS can reduce postoperative pain and accelerate recovery, suggesting that this technique might be superior to MLCS and should be more widely used. One potentially key difference between FAUCS and MLCS is that MLCS includes 100 mcg spinal morphine anesthesia in addition to the same anesthesia used by FAUCS. Any interpretation of apparent differences must take the presence/absence of morphine into account.

Meta-Analysis the Effect of Section Caesarea on Early Breastfeeding Initiation

Background: Early Initiation of Breastfeeding is the baby's first activity to find the mother's nipple within the first hour of birth. UNICEF and WHO recommend Early Breastfeeding Initiation as a strategy to achieve the 4th MDG, namely reducing child mortality. Early Breastfeeding Initiation has many benefits but its prevalence is still low, one of the contributing factors is cesarean section delivery. This study aims to estimate the effect of cesarean section delivery on early breastfeeding initiation based on the results of a number of previous studies. Subjects and Method: This study was a meta-analysis and systematic study. The articles used were obtained from PubMed, Science Direct and Google Scholar published from 2009-2020. The inclusion criteria used were full text articles with observational designs, articles published in English and Indonesian. The PICO study problems are as follows. Population= post partum mothers. Intervention= cesarean section delivery. Comparison= normal delivery. Outcome= early initiation of breastfeeding. Articles were collected using a prism flow diagram. Meta analysis was performed using RevMan 5.3 with a Random Effect Model. Results: A total of 11 articles conducted a meta-analysis review of this study. The metaanalysis of 11 articles showed that women who gave birth through cesarean section technique were 0.33 times more likely to have early breastfeeding initiation compared to normal delivery. (aOR= 0.33; 95% CI= 0.18 to 0.59; p<0.001). Conclusion: Mothers who gave birth through cesarean section technique were more likely to initiate early breastfeeding by 0.33 times compared to normal delivery. Keywords: caesarean section, delivery method, early initiation of breastfeeding Correspondence: Ferda Fibi Tyas Nurkholifa. Masters Program in Public Health, Universitas Sebelas Maret, Surakarta, Jl. Ir. Sutami 36A, Surakarta 57126, Central Java, Indonesia. Email: ferdafibi13@- gmail.com. Mobile: +62856557788

Morphometric Characterization of Human Coronary Veins and Subvenous Epicardial Adipose Tissue—Implications for Cardiac Resynchronization Therapy Leads

Subvenous epicardial fat tissue (SEAT), which acts as an electrical insulation, and the venous diameter (VD) both constitute histomorphological challenges for optimal application and lead design in cardiac synchronization therapy (CRT). In this study, we characterized the morphology of human coronary veins to improve the technical design of future CRT systems and to optimize the application of CRT leads. We retrospectively analyzed data from cardiac computed tomography (CT) of 53 patients and did studies of 14 human hearts using the postmortem freeze section technique and micro CT. Morphometric parameters (tributary distances, offspring angles, luminal VD, and SEAT thickness) were assessed. The left posterior ventricular vein (VVSP) had a mean proximal VD of 4.0 ± 1.4 mm, the left marginal vein (VMS) of 3.2 ± 1.5 mm and the anterior interventricular vein (VIA) of 3.9 ± 1.3 mm. More distally (5 cm), VDs decreased to 2.4 ± 0.6 mm, 2.3 ± 0.7 mm, and 2.4 ± 0.6 mm, respectively. In their proximal portions (15 mm), veins possessed mean SEAT thicknesses of 3.2 ± 2.4 (VVSP), 3.4 ± 2.4 mm (VMS), and 4.2 ± 2.8 mm (VIA), respectively. More distally (20–70 mm), mean SEAT thicknesses decreased to alternating low levels of 1.3 ± 1.1 mm (VVSP), 1.7 ± 1.1 mm (VMS), and 4.3 ± 2.6 mm (VIA), respectively. In contrast to the VD, SEAT thicknesses alternated along the further distal vein course and did not display a continuous decrease. Besides the CRT responsiveness of different areas of the LV myocardium, SEAT is a relevant electrophysiological factor in CRT, potentially interfering with sensing and pacing. A sufficient VD is crucial for successful CRT lead placement. Measurements revealed a trend toward greater SEAT thickness for the VIA compared to VVSP and VMS, suggesting a superior signal-to-noise-ratio in VVSP and VMS.

Application of B-Scan SAT Mode, an Acoustic Cross Section Technique to Analyze Packaged Components beyond Delamination

Failure Analysis labs involved in customer returns always face a greater challenge, demand from customer for a faster turnaround time to identify the root cause of the failure. Unfortunately, root cause identification in failure analysis is often performed incompletely or rushing into destructive techniques, leading to poor understanding of the failure mechanism and root-cause, customer dissatisfaction. Scanning Acoustic Tomography (SAT), also called Scanning Acoustic Microscope (SAM) has been adopted by several Failure Analysis labs because it provides reliable non-destructive imaging of package cracks and delamination. The SAM is a vital tool in the effort to analyze molded packages. This paper provides a review of non-destructive testing method used to evaluate Integrated Circuit (IC) package. The case studies discussed in this paper identifies different types of defects and the capabilities of B-Scan (cross-sectional tomography) method employed for defect detection beyond delamination.