VIBGYOR Group of Schools is a chain of schools, the first of which was established in 2004 in Goregaon, Mumbai, India. Under the leadership of Rustom Kerawalla, Founder Chairman of the Institution, the VIBGYOR Group has opened 40 schools in fourteen major cities.
vibro school
VIBGYOR Group's educational institutions include pre-schools under the name of VIBGYOR Kids and primary and secondary schools under the name of VIBGYOR High. VIBGYOR High offers a choice between the Indian Certificate of Secondary Education (ICSE), Central Board of Secondary Education (CBSE), International General Certification of Secondary Education (IGCSE) and A-level, depending on the school chosen.
Vibgyor High achieved 100% results in 2015, across schools in Mumbai, Pune, Vadodara and Bangalore ICSE Class 10 examinations.[40][41] In 2015, the number of students who took the Class ten boards from several schools across India was around 1.59 lakh with a pass percentage of 98.49%.[42] Of the 253 students, who appeared for the examinations this year from Vibygor High, 40% from across centres scored more than 90% marks, while 93% achieved distinction.[43]
VIBGYOR Group of schools was awarded with the "K-12 School Chain of the year" in the west zone and "Best Sport Empowerment" awards at the 5th Annual Indian Education Congress 2015, held in New Delhi.[45][46]
Vibygor High School, Goregaon and Vibygor High School, Malad were ranked at No. 1 and No. 2 in the Zone D region of Mumbai, respectively. Both the schools have also been ranked at No. 8 and No. 10 respectively amongst the Top 19 Schools in the Mumbai region.[47] Vibygor High was selected from over 500 schools, which were shortlisted.[48] The survey was conducted by Times Group, in partnership with i3 Research Consultants to determine the top schools in each zone in Mumbai.[49] The team conducted an exhaustive sample survey of 910 across seven zones of Mumbai.[50]
In 2010, Maharashtra Navnirman Sena (MNS) activists allegedly ransacked Vibgyor High School in Mumbai,[55] protesting against the expulsion of a female student at the Goregaon school, reportedly because her mother had led morchas against the fee hike effected by the school.[56]
On 2 July 2014, a six-year-old female student was allegedly raped by two staff members of Vibgyor High School, Marathahalli, Bangalore.[60] A medical examination confirmed the girl was sexually abused.[61] The incident triggered large-scale protests in Bangalore[62][63][64] and across India.[65] Eight staff members were detained by police in connection with the incident.[66] The Bangalore Police initially arrested a skating instructor at the school, although he was later released as innocent.[67][68] Two gym teachers at the school were then arrested for the crime a couple of weeks later.[69][70] Charges of gang rape were filed against the two in October.[71]
The chairman of the chain of schools, Rustom Kerawala, was arrested on 23 July 2014 on charges of intentionally suppressing information about the rape.[73][74] He was later released on bail, and charges were filed in October 2014 under The Protection of Children from Sexual Offenses Act.[71][75]
Several parents moved their children to other schools due to the lack of accountability shown by Vibgyor management. The Department of Public Instruction (DPI) has directed the controversy-hit Vibgyor High School in Marathahalli to refund the full amount to the parents who opt to take their children out of the school. Several parents complained that even after the DPI order, the school was denying refund of the amount.[76]
VIVA is the annual cultural festival of VIBGYOR Group of Schools. The latest VIVA was named -Viva La Vida. Usually, VIVA has carnivals, sports and performing arts competitions. Students of different branches meet to celebrate the inter-school festival.
The school has a separate department of faculty and teachers, for its co-curricular program- SPA. Students can avail a range of sports, athletics and performing arts like cricket, football, drama, music, skating, swimming, etc.
The soil profile of the site for the Castle Elementary School expansion consisted of lean clays and fat clays to a depth of 6 to 13 feet below existing grade, with dense lean clays beneath to boring termination depths. A combination of differential settlement between the existing building and the new addition plus the high cost of over-excavating and replacing up to 13 feet of soil led the design team to decide on ground improvement as the best solution for the site. Subsurface Constructors installed 103 vibro stone columns to provide a maximum bearing pressure of 4,000 pounds per square foot (psf) and to keep the settlement of the addition to less than one inch.
Background: Osteoporosis is a highly prevalent multifactorial osteometabolic disease, classically diagnosed, in vivo, by dual energy X-ray absorptiometry (DXA). This study evaluated osteoporosis, ex vivo, using vibro-acoustography (VA), an elastographic technique based on ultrasound radiation force.
The objective of the present work is to study the vehicle suspension as a vibro-acoustic system of high complexity, consisting of many sub-systems with fundamentally different acoustical properties. In a parallel numerical and experimental modelling effort, important contributions to the understanding of its behaviour have been achieved. These findings are based on a balance between component investigations and global modelling of the complete system; they have been formulated for the transmission of both tyre-road excitation and friction-induced vibrations in the brake system.
Initially an experimental study was conducted on a full vehicle test rig studying the broadband interior brake noise problem of, here named, roughness noise. The purpose of the study was twofold: first, to determine if the transmission from the source to the interior of the vehicle was structure-borne; second, to study the complexity of the suspension as a vibro-acoustic system. Parameters a_ecting the vibro-acoustic source were varied to gain understanding of the source mechanisms. This experimental study laid the foundation of the first part of this thesis (paper A) and provided the directions for the second part, the development of a mathematical modelling approach (paper B and C). In these two papers, methods for analysing the complex vibro-acoustic transfer of structure-borne sound in a vehicle suspension system were developed. The last part was then focussed on the wheel rim influence on the vibro-acoustic behaviour (paper D) of the suspension system. As a whole, the work clearly demonstrates that it is possible to conduct component studies of subsystems in the vehicle suspension system; and from these component studies it is possible draw conclusions that very well may avoid severe degradations in the interior noise of future vehicle generations.
An experimental study of the friction-induced noise generated by the disc brake system of a passenger car is presented. In particular, the brake noise usually referred to as wire brush or roughness noise is studied. This is, in terms of frequency spectral content a broadband phenomenon, resulting from the interaction of multiple asperities in the tribological contact. A new experimental method for measurements of disc brake roughness noise is proposed, and is used in a lab environment where the vehicle speed and the brake pressure are accurately controlled. The aim is to study the influence of vehicle speed and brake pressure on the roughness noise inside the vehicle. It is shown for the specific test case that the transmission from the source to the interior is a vibro-acoustic structure-borne phenomenon. Measurements show that there is a, as expected, strong correlation between increased interior noise and both increased vehicle speed and brake pressure.
Classical component mode synthesis methods for reduction are usually limited by the size and compatibility of the coupling interfaces. A component mode synthesis approach with constrained coupling interfaces is presented for vibro-acoustic modelling. The coupling interfaces are constrained to six displacement degrees of freedom. These degrees of freedom represent rigid interface translations and rotations respectively, retaining an undeformed interface shape. This formulation is proposed for structures with coupling between softer and stiffer substructures in which the displacement is chiefly governed by the stiffer substructure. Such may be the case for the rubber-bushing/linking arm assembly in a vehicle suspension system. The presented approach has the potential to significantly reduce the modelling size of such structures, compared with classical component mode synthesis which would be limited by the modelling size of the interfaces. The approach also eliminates problems of nonconforming meshes in the interfaces since only translation directions, rotation axes and the rotation point need to be common for the coupled substructures. Simulation results show that the approach can be used for modelling of systems that resemble a vehicle suspension. It is shown for a test case that adequate engineering accuracy can be achieved when the stiffness properties of the connecting parts are within the expected range of rubber connected to steel.
A vibro-acoustic reduced order model (ROM) based on a substructuring method using undeformed coupling interfaces (UCI) is proposed. The method may be used to reduce the order of a global problem, this by subdividing the global system to substructures interacting through UCI's. The local dynamic stiffness of each substructure may then be modelled with a, for that particular problem, best suited description. The feasibility of the method is demonstrated by a sensitivity analysis of the vibro-acoustic power isolation in a vehicle suspension system, comprising of a link arm connected to a vehicle car body through two rubber bushings. The link arm ROM is a component mode synthesis (CMS)-UCI, the rubber bushing model is a UCI-ROM derived from a 2D axisymmetric model using a frequency dependent visco-elastic material model. Finally the car body model is a frequency dependent UCI-ROM from a full car body finite element model. It is shown that the UCI-ROM approach efficiently can be used for parametric studies on a substructure level. The results suggest that the performed reorientation of the rubber bushings can alter, with orders of magnitude, the energy flow into the car. 2ff7e9595c
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