Lodged Sugarcane/Crop Dividers Interaction: Analysis of Robotic Sugarcane Harvester in Agriculture via a Rigid-Flexible Coupled Simulation Method

As a critical component of the sugarcane harvester, the primary function of the crop dividers is to lift the lodged sugarcane (LS) and reduce the loss rate of the sugarcane harvest. In this study, a rigid-flexible coupling simulation method is proposed to improve the lifting efficiency of the crop dividers on severely LS and analyze the nature of interaction between the sugarcane stalk and the crop dividers. The model’s accuracy was verified using field experiments, and the operational performance of the crop dividers on sugarcane in different lodging postures was investigated. The results showed that the curve of the vertical height of the center (VHC) fluctuated more and slipped with highest frequency during the lifting process of side and forward LS. The speed of VHC was fastest during the lifting operation of side LS. The effect of side angle on the lifting effect of sugarcane was significant; the qualified values of the VHC of sugarcane being lifted in different lodged postures were: side and reverse lodged > side lodged > side and forward lodged. The coupling method and experimental results described in this paper can provide guidance for the optimal design and field operation of the crop dividers.

Panoramic Radiograph and CBCT in Unilateral Mandibular Condylar Hyperplasia—A Case Report

Condylar hyperplasia (CH) of the mandible is a rare developmental disorder that results in enlargement of the condyle. It is predominant in females, mostly unilateral and self-limiting. This report presents a case of a 35-year-old female patient with unilateral condylar hyperplasia with an increase in vertical height of mandibular ramus of the affected side. After initial radiographic evaluation, the asymmetry index using a panoramic radiograph was determined and also analyzed using cone-beam computed tomography (CBCT). Condylar dimensions in all the planes were measured for both sides using CBCT. This case report emphasizes the importance of CBCT and its role in the diagnosis and assessment of mandibular condylar hyperplasia.

Training of simple fire installation for security guard at Samarinda State Polytechnic

The Samarinda State Polytechnic has a hydrant that does not work, because the installation is damaged and is 35 years old. Currently, a simple fire fighting water installation has been made at three points with a length of 257 meters for 16 buildings, which utilizes lake water inside the Samarinda State Polytechnic campus. Therefore, this service activity is intended to provide skills for security guard in the Samarinda State Polytechnic regarding the use of hydrants. The specifications of the equipment used are portable centrifugal pumps with a maximum capacity of 700 liters/minute, a horizontal reach length of 40 meters, a vertical height of 12 meters and a pump pressure of ±5 bar. The results of this activity revealed that all security guard at the Samarinda State Polytechnic were able to operate a simple fire extinguisher installation. In addition, security personnel also have the ability to maintain a fire pump engine.

Maximum crosswind integrated ground level concentration in two stability classes

bl 'kks/k i= esa fu"izHkkoh vkSj vfLFkj fLFkfr;ksa esa ØkWliou lekdfyr lkanz.k ysus ds fy, nks fn’kkvksa esa vfHkogu folj.k lehdj.k ¼ADE½ dks gy fd;k x;k gSA ykIykl :ikarj.k rduhd dk mi;ksx rFkk m/okZ/kj Å¡pkbZ ij vk/kkfjr iou xfr vkSj Hkaoj folj.k’khyrk dh leh{kk djrs gq, ;g gy fudkyk x;k gSA blds lkFk gh Hkw&Lrj vkSj vf/kdre lkanz.kksa dk Hkh vkdyu fd;k x;k gSA geus bl ekWMy esa iwokZuqekfur vkSj izsf{kr lkanz.k vk¡dM+ksa ds e/; rqyuk djus ds fy, dksiugsxu ¼MsuekdZ½ ls fy, x, vkuqHkfod vk¡dM+ksa dk mi;ksx fd;k gSA The advection diffusion equation (ADE) is solved in two directions to obtain the crosswind integrated concentration in neutral and unstable conditions. The solution is solved using Laplace transformation technique and considering the wind speed and eddy diffusivity depending on the vertical height. Also the ground level and maximum concentrations are estimated. We use in this model empirical data from Copenhagen (Denmark) to compare between predicted and observed concentration data.

Growth and Bone Development in the Horse: When Is a Horse Skeletally Mature?

Within the lay literature, and social media in particular, there is often debate about the age at which a horse should be started and introduced to racing or sport. To optimize the welfare and longevity of horses in racing and sport, it is important to match exercise with musculoskeletal development and the ability of the musculoskeletal system to respond to loading. The justification for not exercising horses at a certain age is often in contrast to the scientific literature and framed, with incorrect generalizations, with human growth. This review provides a relative comparison of the growth and development of the horse to the descriptors used to define growth and development in humans. Measures of physeal closure and somatic growth demonstrate that the horse completes the equivalent of rapid infant growth by weaning (4–6 months old). At approximately 11 months old, the horse completes the equivalent of the childhood phase of growth and enters puberty. At 2 years old, the horse has achieved most measures of maturity used within the human literature, including the plateauing of vertical height, closure of growth plates, and adult ratios of back length:wither height and limb length:wither height. These data support the hypothesis that the horse evolved to be a precocious cursorial grazer and is capable of athletic activity, and use in sport, relatively early in life.

Different solutions of the diffusion equation and its applications

In this report, we solved the advection–diffusion equation under pollutants deposition on the ground surface, taking wind speed and vertical diffusion depend on the vertical height. Also, we estimated a simple diffusion model from point source in an urban atmosphere and the conservative material with downwind was evaluated. Then, we calculated the extreme ground-level concentration as a function of stack height and plume rise in two cases. Comparison between the proposed models and the emission from the Egyptian Atomic Research Reactor at Inshas had been done. Lastly, we discussed the results in this report.

Baseline MRI findings as predictors of hypopituitarism in patients with non-functioning pituitary adenomas

Hypopituitarism tends to occur in large pituitary adenomas. However, similar tumors could present with strikingly different hormonal deficiencies. In this study, we looked at MRI characteristics in non-functioning pituitary adenomas (NFPA), which could predict secondary adrenal insufficiency (SAI) and central hypothyroidism (CHT). We reviewed the files of patients with NFPA attending our clinic. Tumor size, invasiveness, MR-signal intensity, and gadolinium enhancement in preoperative MRI were recorded along with documented presurgical hypopituitarism profile. Logistic regression was used to predict SAI, CHT or both (SAI/CHT) based on MRI and demographic parameters. Receiver operating characteristic curves were used to determine their diagnostic utility. 121 patients were included. Older age (P=0.021), male sex (P=0.043), stalk deviation (P<0.0001), contrast enhancement (P=0.029) and optic chiasma compression (P=0.012) were associated with SAI/CHT. Adenoma vertical height, largest diameter, and estimated volume were also strongly associated with SAI/CHT (P<0.0001). These associations remained significant in a multivariate analysis. No tumor smaller than 12mm in vertical height, 17mm in largest diameter, or 0.9 cm3 in volume was associated with SAI/CHT. At cutoff >18mm for vertical height, >23 mm for largest diameter, and >3.2 cm3 the sensitivity was around 90-92% for detecting SAI/CHT. Only vertical height was significantly associated with any one or more pituitary hormonal deficit (P=0.001). In conclusion, adenoma size, independent of the measurement used, remains the best predictor of SAI/CHT in NFPA. Dynamic testing to rule out SAI is probably indicated in adenomas larger than 18 mm vertical height, 23 mm largest diameter and 3.2cm3 adenoma volume.

The Effect of Open Boundaries on the Buoyant Viscoelastic Flow in a Vertical Porous Layer

The Oldroyd&ndash;B model for a linear viscoelastic fluid is employed to investigate the buoyant flow in a vertical porous layer with permeable boundaries kept at different uniform temperatures. Seepage flow in the viscoelastic fluid saturated porous layer is modelled through an extended version of Darcy&rsquo;s law taking into account the Oldroyd&ndash;B rheology. The basic stationary flow is parallel to the vertical axis and describes a single&ndash;cell vertical pattern where the cell has an infinite vertical height. A linear stability analysis of such a basic flow is carried out to determine the onset conditions for a multicellular pattern. The neutral stability curves and the values of the critical Rayleigh number are evaluated numerically for different retardation time and relaxation time characteristics of the fluid.

Evaluation of Different Parameters Responsible for Perception of a Pleasing Profile - A Photographic Silhouette Study from Vadodara, India

BACKGROUND Orthodontics has witnessed a paradigm shift in the perception of aesthetics. Soft tissue assessment and correction has become a greater concern when compared with dental and skeletal correction. In the current era, pleasing profile is a prime requisite. The purpose of this study is to evaluate different parameters responsible for perception of a pleasing profile. METHODS Hundred dental students with well-balanced faces were selected. Profile photographs of participants were taken by DSLR camera maintaining standardized photography protocol. The principal investigator had measured ten soft tissue parameters for each profile photograph. These profile photographs were further converted into profile silhouettes. 10 laypersons appraised each profile silhouette using visual analog scale (VAS). The obtained scores were again correlated with photographic measurements of each individual to identify role of different parameters responsible for pleasing profile. RESULTS When comparing the data statistically, significant differences were found amongst the parameters between less attractive and more attractive profile; parameters include facial convexity angle, naso-labial angle, protrusion of lip relative to each other, vertical lip to chin ratio and vertical height ratio. CONCLUSIONS It was clear from this study that, amongst individuals with normal overjet, overbite and a pleasing profile, those subjects with more obtuse facial convexity angle, obtuse nasolabial angle, slightly more protruded upper lip than lower lip, equivalent vertical height ratio, and smaller lip-chin ratio vertically, were found to be more attractive, as perceived by laypersons. KEY WORDS Parameters, Photographic Soft Tissue Analysis, Silhouette Study, Pleasing Profile

Adenoid Hypertrophy with Deviated Nasal Septum in Young Adults

Adenoid hypertrophy is a common cause of nasal obstruction in children but relatively uncommon in adults, however adenoid hypertrophy in young adults is thought to be a persistence of untreated adenoid hypertrophy of childhood. This case series also notes that adenoid hypertrophy can be associated with deviated nasal septum. Coblation assisted endoscopic adenoidectomy usually has good result in adenoid clearance. Hence, routine endoscopic examination of nasopharynx helps in early diagnosis of adenoid hypertrophy and subsequent better management in young adults with complaints of nasal blockage. Nasopharyngeal vegetations were earlier described by Wilhelm Meyer in 1870 as forming part of Waldeyer’s ring of lymphoid tissue and he coined the term ‘adenoid’ to describe the same. In younger children, it has been thought that the adenoids may have an important role in development of an immunological memory. Physiologically it has been considered that hypertrophy of adenoid tissue occurs during 6 - 10 years and tend to regress and atrophy at 16 years. Grading of adenoid hypertrophy as described by Clemens et al. is as follows.1  Grade I: adenoid tissue filling 1/3rd. of the vertical height of choana.  Grade II: adenoid tissue filling up to 2/3rd of the vertical height of choana.  Grade III: from 2/3rd to nearly all but not completely filling the choana.  Grade IV: complete choanal obstruction We present three cases of adenoid hypertrophy with deviated nasal septums in adults who visited ENT outpatient department (OPD) at National Institute of Medical Sciences, Jaipur during COVID era of January 2021 to April 2021.