Evaluation of cavitation phenomena in three-way globe valve through computational analysis and visualization test.

A three-way valve has a multi-port structure with three openings, which allows control of the fluid direction. However, owing to the complicated trim shape of the internal flow, an irregular fluid flow occurs, which hinders precise fluid flow control. In severe cases, cavitation induces mechanical damage owing to abrupt changes in the fluid direction. In this study conducted a computational fluid dynamics (CFD) analysis was performed to estimate the localized cavitation around the bottom plug of the three-way valve. To quantify localized cavitation, the percentage of cavitation (POC) was derived using the vapor volume fraction (VVF). The POC, defined by the cavitation occurrence zone with VVF > 0.5 divided by the volume of the cavitation danger zone, was 34.90%. Cavitation at this POC level could cause mechanical damage; therefore, a size optimization was performed. The lengths of the optimized waist and tail regions of the bottom plug were obtained wherein the POC level decreased by 19.06%. In addition, experiments were conducted using a flow visualization test setup. The experimental results were quantified into the POC employing the image gradients method, and the results were in good agreement with the CFD analysis.

The Impact of Spectral and Temporal Degradation on Vocoded Speech Recognition in Early-Blind Individuals.

This study compared the impact of spectral and temporal degradation on vocoded speech recognition between early-blind and sighted subjects. The participants included 25 early-blind subjects (30.32 ± 4.88 years; male:female, 14:11) and 25 age- and sex-matched sighted subjects. Tests included monosyllable recognition in noise at various signal-to-noise ratios (-18 to -4 dB), matrix sentence-in-noise recognition, and vocoded speech recognition with different numbers of channels (4, 8, 16, and 32) and temporal envelope cutoff frequencies (50 vs 500 Hz). Cortical-evoked potentials (N2 and P3b) were measured in response to spectrally and temporally degraded stimuli. The early-blind subjects displayed superior monosyllable and sentence recognition than sighted subjects (all p < 0.01). In the vocoded speech recognition test, a three-way repeated-measure analysis of variance (two groups × four channels × two cutoff frequencies) revealed significant main effects of group, channel, and cutoff frequency (all p < 0.001). Early-blind subjects showed increased sensitivity to spectral degradation for speech recognition, evident in the significant interaction between group and channel (p = 0.007). N2 responses in early-blind subjects exhibited shorter latency and greater amplitude in the 8-channel (p = 0.022 and 0.034, respectively) and shorter latency in the 16-channel (p = 0.049) compared with sighted subjects. In conclusion, early-blind subjects demonstrated speech recognition advantages over sighted subjects, even in the presence of spectral and temporal degradation. Spectral degradation had a greater impact on speech recognition in early-blind subjects, while the effect of temporal degradation was similar in both groups.

Anthropometric Analysis of the Faces of Chinese Women in Leadership Roles.

The aim of this study was to investigate the appearance of the faces of Chinese women in leadership positions through an anthropometric analysis of Women of China from 1949 to 2022. Photographs of cover women of Women of China were gathered and a total of 380 frontal and 101 lateral photographs were collected. The photographs were divided into 3 time phases: phase I (1949-1978): from the launch of Women of China magazine, up until the time of reform and opening; phase II (1978-2010): from the time of reform and opening until when Google China was blocked; and phase III (2010-2022): to the present. The horizontal corneal diameter (11.52 mm) was set as the reference value for the frontal face. The anthropometric results showed the width of the face, midface, and lower face decreased over time. The women at phase I had larger and round faces, smaller and narrower eyes, wider noses, and thicker lips; relatively masculine and hard-working woman image, as the occupations of women were mainly described as workers, farmers, and civil servants. Phase II showed smaller but still round faces, relatively wide-set round eyes, narrower noses, and smaller lips than in phase I; neutral features as skilled workers, engineers, entrepreneurs, civil servants, and researchers. Phase III showed oval faces, almond eyes, narrower noses, smaller full lips, and wider chins, reflecting a process of feminization; working in entertainment, sports, and science. The data from this study might serve as the recommended aesthetic proportions when performing plastic surgical procedures for talented woman.

Anthropometric analysis of the faces of Chinese beauty pageant winners, from the early 20th century to the present.

The aim of this study was to investigate the aesthetic characteristics of Chinese beauty through an anthropometric analysis of beauty pageant winners from 1952 to 2021. Photographs from 5 renowned Chinese beauty pageants (Miss World Pageant, Miss Earth Pageant, Miss Universe Pageant, Miss International Pageant, and Miss Chinese Cosmos Pageant) were gathered and a total of 294 frontal and 31 lateral photographs were collected. The photos were divided into 3 time phases: phase I (1952-1977): from the first time when Chinese girls participated in beauty pageants, up until the time of reform and opening; phase II (1978-2002): from reform and opening to the re-opening of the Miss Chinese Cosmos Pageant; phase III (2003-2021): to the present. The horizontal corneal diameter (11.52 mm) was set as the reference value for the frontal face. Among the 35 anthropometric items of frontal faces (26 distances and 9 angles) and 41 anthropometric items of lateral faces (33 distances and 8 angles), 21 anthropometric items (16 distances and 5 angles) and 8 proportional indices of frontal faces showed significant differences. On lateral pictures, 2 angles showed significant differences among the 3 phases. Regarding the anthropometric measurements that decreased across the 3 phases, the width of the face, midface, and lower face exhibited the greatest changes. The lower face width showed the most striking changes, with a decrease from 128.5 to 112.0 mm. The quadratic regression revealed a significant turning point after 1978, coinciding with the period of Chinese reform and opening, which had a profound impact on aesthetics.

Freeing and Stretching the Palatine Vessels From the Greater Palatine Foramen in Palatoplasty.

The aim of this paper is to present how to free and stretch the palatine vessels from the greater palatine foramen in palatoplasty. After a mucoperiosteal flap is raised, periosteal elevator is passed behind the palatine vessels to detach the periosteum around the vessels. Then, a blunt right-angle instrument is placed behind the palatine vessels, and the vessels are pulled from the foramen in the superior aspect, slightly forward (63 degrees) and medially (19 degrees) according to the direction to the greater palatine canal (GPC). The nasal mucosa is also released from the hard palate and from the lateral pharyngeal wall. After dividing the palatal aponeurosis and elevating the anterior flap, the first suture is inserted through the nasal layer of the mucosa at the level of the posterior border of the hard palate (A suture). The nasal layer is approximated and sutured. After the closure of the buccal layer, the 2 posterior flaps are joined to the small anterior flap. Finally, A suture is tied. In 60 cases of pushback palatoplasty, the palatine vessels were stretched from the greater palatine foramen. In literatures, the length of GPC is 26.97 mm. Anteroposterior diameter of the upper opening of GPC is 3.88 mm. The angle between the vertical plane and the axis of GPC is 19.09 degrees. The angle between the transverse plane and the axis of GPC is 62.63 degrees. Probably, this information is the values obtained in adults. As a matter of fact, similar values were obtained in our study on this subject.

The Distribution of the Nerves and Arteries of the Platysma for Clinical Applications.

This study aimed to provide anatomical data on the platysma for clinical procedures. The authors obtained 25 specimens from 15 adult Korean cadavers (9 men, 6 women; mean age, 72 years; range, 61-85 years). Lines connecting the gonion with the gnathion (G-GN) and the acromial end (acromial end of the clavicle) with the sternal end (sternal end of the clavicle) were used as references. Modified Sihler staining was used to trace the nerves distributed in the platysma. The superior border values of the platysma were 12.1 ± 2.7 mm, 31.5 ± 5.3 mm, 42.4 ± 5.6 mm, and 61.7 ± 6.4 mm, respectively, for sections 2 through 5 on the G-GN line. The inferior border values of the platysma were 83.6 ± 19.1 mm, 80.1 ± 14.0 mm, 74.8 ± 14.5 mm, 67.2 ± 13.7 mm, and 54.6 ± 7.1 mm, respectively, for the 5 sections on the acromial end of the clavicle-sternal end of the clavicle line. In the hyoid bone, cricoid cartilage, and jugular notch, the mean distance between the bilateral platysma was 14.4 ± 2.2 mm, 22.6 ± 10.6 mm, and 51.1 ± 15.7 mm, respectively. The mean angle at the cervical branch of the facial nerve and the anterior border of the sternocleidomastoid muscle sternal head was 28.7 ± 2.6 degrees and 53.4 ± 7.7 degrees from the G-GN line, respectively. The upper third of the platysma was supplied by branches of the facial artery and submental artery. The middle third was supplied by branches of the occipital artery and received its direct blood supply from branches of the external carotid artery. The lower third was supplied by branches of the transverse cervical artery. The authors hope that the results of this study will be helpful for rejuvenation procedures of the neck.

Digital Compression of the Origin of the Nasal Branch of the Ophthalmic Artery During Filler Augmentation: A Review of the Anatomical Literature and an Analysis of Plastinated Specimens.

The aim of this study was to determine the exact site of digital compression on the origin of the nasal branch of the ophthalmic artery during filler augmentation, by conducting a review of anatomical literature and examining plastinated specimens. According to 4 textbooks (Gray's Anatomy, Whitnall's Anatomy on the Human Orbit, Wolff's Anatomy, and Duke-Elder's System of Ophthalmology), the dorsal nasal artery leaves the orbit by piercing the orbital septum between the trochlea and the medial palpebral ligament and anastomoses with the angular part of the facial artery. In plastinated arterial specimens, the ophthalmic artery exits the orbit and divides into the supratrochlear artery and the dorsal nasal artery at the upper border of the lacrimal fossa. The dorsal nasal artery then anastomoses with the angular part of the facial artery. Branches of the dorsal nasal artery anastomose with their counterparts on the opposite side. During filler augmentation of the nose, bilateral digital compression is applied to the origins of the nasal branches of the ophthalmic artery, specifically at the point where the ophthalmic artery pierces the orbital septum. Applying compression just above the medial palpebral ligament against the bone, directly above the lacrimal sac, using the index finger and thumb can help prevent the migration of injected droplets to the ophthalmic artery. This straightforward maneuver, grounded in anatomical understanding, aims to prevent the migration of injected droplets to the ophthalmic artery.

Thickness of the Deltoid Muscle and Location of the Anterior Branch of the Axillary Nerve and the Posterior Circumflex Humeral Artery for Deltoid Injections.

This study investigated the thickness of the deltoid muscle and the location of the anterior branch of the axillary nerve (AAN) and posterior circumflex humeral artery (PCHA), with the goal of maximizing the effectiveness of deltoid injections. Forty specimens from 22 adult Korean cadavers were used. A reference line was identified, connecting the anterior point of the deltoid muscle (AP) and the posterior point of the deltoid muscle (PP) on the surface. The midpoint between the AP and PP was used as the origin point (OP). The line connecting the OP and the lowest point of the deltoid tuberosity (DP) was used as the y-axis. The mean distance of the reference line from the AP to PP was 4.7 ± 0.7 cm. The vertical mean length of the deltoid muscle from the OP and DP was 16.1 ± 1.0 cm. At the 3, 5, and 7 cm sites, the thickness of the deltoid muscle was 0.62 ± 0.9, 0.73 ± 0.7, and 1.3 ± 1.1 cm, respectively. Most of the branches of the axillary nerve were concentrated in the third section (4-6 cm, 51%), while the branches of the PCHA were predominantly found in the fourth section (6-8 cm, 69%). The peripheral branches of the AAN entering the muscle were distributed between 2.2 and 9.8 cm from the acromion. The mean number of the peripheral branches of the AAN was 9.6 ± 3.4. In the deltoid muscle, the mean number of peripheral branches of the PCHA was 8.2 ± 2.8. Administering deltoid injections 5-6 cm below the OP is recommended to avoid axillary nerve injury.

Impact of Short Sleep Duration on the Incidence of Obesity and Overweight among Children and Adolescents.

Background and Objectives: The prevalence of obesity among children is increasing and is highlighting many problems. Lack of sleep is common among children and adolescents. Although several studies have investigated sleep duration and overweight and obesity from a sex perspective, data regarding age and sex effects remain limited and inconclusive. This study aimed to evaluate the risk(s) for overweight or obesity according to sleep duration among children and adolescents; to evaluate the effect of short sleep duration on the incidence of overweight/obesity among children and adolescents; and to evaluate sex differences in the risk of overweight or obesity with shorter sleep durations. Materials and Methods: The PubMed database was searched for relevant studies published up to June 30, 2021. Odds ratios for obesity/overweight were estimated for short compared with long sleep duration. Subgroup analysis based on sleep duration, sex, and study location was also performed. Results: The estimated odds ratio for combined obesity and overweight was 1.171 (95% confidence interval (CI) 1.092−1.256) according to short sleep duration. Obesity/overweight with short sleep duration was significantly prevalent in the <6 and 6−10 years' subgroups (odds ratio 1.226 (95% CI 1.083−1.387) and 1.341 (95% CI 1.175−1.530), respectively). Among boys, short sleep duration was significantly correlated with a high occurrence of obesity/overweight (odds ratio 1.294 (95% CI 1.153−1.452)); no such correlation was found among girls. Conclusions: Short sleep duration may increase risk of obesity among children and adolescents, especially those <6 and 6−10 years of age. In the subgroup analysis, the incidence of obesity/overweight for short sleep time revealed significant results among Asians and boys.