2,695 research outputs found
Development of a virtual reality milling machine for knowledge learning and skill training
No full textCurrent methods of training personnel on high cost machine tools involve the use of both classroom and hands on practical training. The practical training required the operation of costly equipment and the trainee has to be under close personnel supervision. The main aim of this project is to reduce the amount of practical training and its inherent cost, time, danger, personal injury risk and material requirements by utilising a virtual reality technology.
In this study, an investigation into the use of Virtual reality for training operators and students to use the Milling Machine was carried out. The investigation has been divided into two sections: first the development of Milling Machine in the 3D virtual environment, where the real machine was re-constructed in the virtual space.
This has been carried out by creating objects and assembling them together. The complete Milling machine was then properly modelled and rendered so it could be viewed from all viewpoints.
The second section was to add motion to the virtual world. The machine was made of functions as for the real machine. This was achieved by attaching Superscape Control Language (SCL) to the objects. The developed Milling machine allows the users to choose the material, speed and feed rate. Upon activation, the virtual machine will be simulated to carry out the machining process and instantaneous data on the machined part can be generated.
The results were satisfactory, the Milling Machine was modelled successfully and the machine was able to perform according to task set. Using the developed Virtual Model, the ability for training students and operators to use the Milling Machine has been achieved
Xenovarta viraktamathi Meshram & Hashmi 2018, sp.nov.
No full textXenovarta viraktamathi sp.nov. (Figs. 1–12) Pale green with red stripes (Figs. 1&2). Vertex lateral margin with a red stripe terminating into two black dot in dorsal view and ventrally with single dot (Fig. 3). Face yellow, anteriorly with boomerang shaped black spot with red margins (Fig. 4). Pronotum anteriorly orange yellow, rest pale green with four red stripes. Scutellum pale with two obscure orange stripes. Front wing pale green with red stripes (Fig. 4). Head including eyes 0.9x width of pronotum, in dorsal view triangularly produced in front; vertex length as long as width across eyes; ocelli near anterior margin of vertex, close to eye; face 1.6x as long as wide; anteclypeus apically exceeding facial margin, slightly wider apically than at base, 0.34 times as long as frontoclypeus (Fig. 4); frontoclypeus parallel sided; clypellus; antennae situated nearly upper margin of eye in facial view (Fig. 3). Pronotum (Fig. 3) 0.73x as wide as long and 0.76x width of scutellum; anterior margin of pronotum roundly produced between eyes. Male genitalia: Pygofer (Fig. 5 & 6) longer than wide, with posterior lobe produced and terminating in dorsally directed acute processes, one on either side. Segment X stout, dorsal half sclerotized, with a caudo-ventral bifid process (Fig. 6). Valve fused to subgenital plates the latter fused to near apex with a poorly developed caudolateral process; with distal macrosetae and many fine ventral setae arranged irregularly (Figs. 9 & 10). Style (Fig. 11) with well-developed preapical lobe, with few short spine-like setae, apophysis digitate 0.23x of the total length. Connective stem as long as arms (Fig. 12), arms closely appressed. Aedeagus (Figs. 7 & 8), with shaft uniform in width throughout length in lateral and ventral view, abruptly tapered distally to acute apex, with pair of lateral subapical lamellate processes; gonopore large, subapical at base of lateral processes; preatrium absent; dorsal apodeme moderately well developed, tapered to narrowly rounded apex. Measurements (mm) - Male: 7.52 long, 1.20 wide across eyes, 0.75 length of pronotum, 1.31 width of pronotum. Type material. Holotype ♂, INDIA: Arunachal Pradesh: Basar (27°59′0″N 94°40′0″E; Altitude- 1896 ft), 30.vi.2018, net sweeping on bamboo plants, coll. Stuti & Tahseen (NPC). Paratypes 2 ♂, same data as holotype (NPC). NCBI GenBank, accession number: MH 986788. Etymology. The species is named after Prof. C. A. Viraktamath in recognition of his monumental contributions to leafhopper taxonomy. Remarks. Xenovarta viraktamathi sp.nov. runs to Xenovarta in Viraktamath’s (2004) key to genera, disagreeing in having a small ventral process on segment X. It also appears to differ from other species of Xenovarta in having the forewing apex rounded rather than truncate. It resembles Xenovarta acuta Viraktamath externally but differs from this and other species by the more rounded apex of the forewing and simple symmetrical aedeagus with a pair of subapical lateral processes.Published as part of Meshram, Naresh M. & Hashmi, Tahseen Raza, 2018, First record of the leafhopper genus Xenovarta Viraktamath (Hemiptera, Cicadellidae, Deltocephalinae) from India with description of a new species, pp. 444-446 in Zootaxa 4532 (3) on page 446, DOI: 10.11646/zootaxa.4532.3.9, http://zenodo.org/record/261552
Folio
No full textEducation SpecialEditorial. pp. v-vii; Profile-The Principal. pp. 1-2; Anwar M. Barkat-Article-The Goals of Education at F.C. pp. 3-8; Interview with Mr Abdul Hafeez Pirzada. pp. 9-15; Interview with Dr Abdul Khaliq. pp. 16-37; Interview with Dr Mohammad Ajmal. pp. 38-44; Interview with Dr Z. A. Hashmi. pp. 45-50; Interview with Dr (Miss) Kaneez F. Yousus. pp. 51-56; Anwar M. Barkat-Article-Asian University in the Perspective of Development and Modernization. pp. 57-61; Cyprian, Eric-Article-Thoughts on Education in Pakistan Today. pp. 62-63; Schlorholtz, A. A.-Attitude, Latitude, Gratitude. pp. 64-68; Sabeeh ur Rehman-Things I Want to Say. pp. 69-74; Mohammad Ahmed-Article-Need of Physical Education. pp. 75-77; Iqbal, M. Anwar-Teachers are Difficult for Students. pp. 78-80; Irteza Shah-Article-Education and its Place in our Society. pp. 81-83; Kaleem Omer-Poetry-Kashmir Diary. pp.84; Kaleem Omer-Poetry-Naming a Son. pp. 85; Akhar Tahir-Poetry-Fields. pp. 86; Akhar Tahir-Poetry-Album. pp. 87; Alamgir Hashmi-Poetry-Galillee. pp. 88-89; Alamgir Hashmi-Poetry-F.C.C. Bridge. pp. 90-91; Alamgir Hashmi-Poetry-By the F.C.C. Canal. pp. 92; Nasim Akhter-Poetry-A Visit. pp. 93; Naseer Ahmed-Poetry-In the Evening of Behrain. pp. 94; Naseer Ahmed-Poetry-How I Met My Father's Death. pp. 95; Danish Farhad-Poetry-The Misogynist. pp. 96; Irteza Shah-Poetry-My Love. pp. 97; Afsar Jahan-Poetry-For a Change. pp. 98; John Shaffaq-Poetry-Life. pp. 99; Ashtar Ausaf-Poetry-Apples Have Borrowed. pp. 99; Ashtar Ausaf-Poetry-Above the Trees. pp. 100; Agha Zulqarnain-Poetry-She is Dead. pp. 101; Irteza Shah-Story-Five Soldiers. pp. 102-104; Tahir Sarwar-Story-The Slave. pp. 105-110; Nazli Saleem-Story-The Sacrifice. pp. 111-113; Ghazala Anis-Story-Who Never Turned Up. pp. 114-117; Condolence: Dr E. M. Ewing. pp. 118; Condolence: Professor Z. Bede. pp. 119; Condolence: Gen Nasir-ud-Din. pp. 119; A Letter from Dr E. J. Sinclair. pp. 119; Iqbal Mirza-Dr E. J. Sinclair. pp. 120-122; Iqbal Mirza-Professor R. C. Thomas. pp. 123-125; Tahir Sarwar-Essay-A Visit to a Girls College. pp. 126-128; Haroon Omar-Essay-Man at Cross Roads. pp. 129-131; Abdul Mateen Khan-Essay-Food Crisis in Islamic Countries. pp. 132-133; Ghazala Anis-Essay-Human Happiness. pp. 134-136; Shahid Mahmood-Essay-Reverie. pp. 137-140; Shahid Ghafoor-Essay-Students and Politics. pp. 141-142; Professor Iqbal Mirza and Ashtar Ausef-F. C. Round Up. pp. 143-146; Contributors. pp. 147-148; Folio [Urdu] 128 p.Folio Editors. after contents; Dr Anwar M. Barkat, Principal. before page 1; Prof. Z. Bede (Late). after page 118; Dr R. M. Ewing (Late). after page 118; Prof. R. C. Thomas. after page 122; FCC: a survey (Cartoon). after page 146; Mualana Syed Farzand Ali. after page 8 (Urdu section); General Nasir Ali. after page 6 (Urdu section); Bazm-e-Adab 1973-74. before contents (Urdu section
First record of the leafhopper genus Xenovarta Viraktamath (Hemiptera, Cicadellidae, Deltocephalinae) from India with description of a new species
No full textMeshram, Naresh M., Hashmi, Tahseen Raza (2018): First record of the leafhopper genus Xenovarta Viraktamath (Hemiptera, Cicadellidae, Deltocephalinae) from India with description of a new species. Zootaxa 4532 (3): 444-446, DOI: 10.11646/zootaxa.4532.3.
Temporomandibular disorders in patients with mandibular fractures: A preliminary comparative case-control study between South Australia and Oman
No full textA. Al-Hashmi, A. Al-Azri, M. Al-Ismaily, A. N. Gos
Enantiopure Tetrathia[7]helicene-based Gold(I) Complexes
No full textTetrathia[7]helicenes (7-TH) are polyconjugated -systems in which four thiophene rings are orthofused to alternating arene rings to generate a non planar, chiral, stable helix which allows the existence of M and P enantiomers. The 7-TH systems are very interesting structures1 even because they can be easily and selectively functionalized in the alpha positions of the terminal thiophene rings,2 making it possible the introduction of appropriate substituents.
In the course of our studies on the synthesis of phosphane derivatives of 7-TH as potential innovative chiral ligands in asymmetric organometallic catalysis,3 gold(I) complexes of the phosphines of 7,8-di-n-propyl-tetrathia[7]helicene 1 and 2 (Figure 1) provided promising results in some cycloisomerization reactions.
Figure 1.
Encouraged by these results, the two P and M enantiomers of gold(I) complex 1 have been synthesized, and tested in asymmetric transformations.
The use of gold in homogeneous catalysis has witnessed tremendous activity in recent years.4 Thanks to gold(I) phosphine-based catalysts, various organic transformations have been accessible with both high yields and chemo- and stereoselectivity. In particular, asymmetric gold catalysis represents a very hot topic in catalytic research,5 and several efforts have been made by various research groups in this field.
References
1. Collins, S. K.; Vachon, M. P. Org. Biomol. Chem. 2006, 4, 2518-2524.
2. Licandro, E.; Baldoli, C.; Maiorana, S. et al. Synthesis 2006, 3670-3678.
3. Cauteruccio, S.; Licandro, E.; Maiorana, S. et al. Eur. J. Org. Chem. 2011, 5649-5658.
4. Hashmi, A. S. K.. Chem. Rev. 2007, 107, 3180-3211.
5. Sengupta, S.; Shi, X. ChemCatChem 2010, 2, 609-619
Miriam Sampaio : Murmur
No full textThis publication stems from artist Sampaio’s residency at Centre de production Daïmõn in the fall of 2001. The resulting exhibition comprised photographs taken by the artist while in Portugal where she was researching her Judaic-Portuguese roots. Hashmi comments on this work in a personal and poetic text that includes many quotes from the artist. Texts in English and French. Biographical notes on artist and author. 2 bibl. ref
Shafiq Fatima Shera Urdu Nazm ki Munfarid Aawaz
No full text<p>Shafiq Fatima Shera is widely considered a 'difficult poet'. That is the reason she couldn't get the identity she deserves. This study will be able to present an in-depth analysis of Shera's thought process, the power of her language and imagery, and her sustained creativity. Shera's spiritual sustenance and psychic restorations will also be studied for determining her distinctiveness. Till date, there is not any specific book on Shera's contributions as a poet. She was praised by only some of the critics of her age. Though we have some important writings (of Fuzail Jafri, Waheed Akhtar, Hameed Nasim, and Mushaf Iqbal Tausifi) discussing one or other aspect of her poetry. Besides, two dissertations for M.Phil. on the topics شفیق فاطمہ شِعریٰ کا اردو کی جدید شاعری میں حصہ and شفیق فاطمہ شِعریٰ کے کلام میں تلمیحات were submitted at Osmania University, Hyderabad, and MANUU, Hyderabad respectively under the supervision of Prof. Baig Ehsas and Prof. Nasimuddin Farees in 2004 and 2009. Whereas an M. Phil. Dissertation on the topic شفیق فاطمہ شِعریٰ کی شاعری کا محاکمہ was completed under the guidance of Prof. Mazhar Mehdi Hussain at JNU, New Delhi in 2014. They are still unpublished. Shera's poetry has also been a part of a couple of theses written on Urdu poetry. In this analysis of Shera's long poem "Silsila-e-Mukalamaat", it is be argued that Shera has not imbued elements of religion as a fashion. Her poetry has the richest and most thoughtful blend of imagery and style. She overshadows her contemporaries in poetic style and imagination. This research will also construe that she was a far better and more promising poet than most of her male contemporaries.</p>
Mechanical and metallurgical properties of two-layered diamalloy 4010 and 2002 HVOF coating
No full textDiamalloy 4010, which is iron/molybdenum blend, is resistive to wear and Diamalloy 2002 is resistive to corrosion and wear. However, combination of these powders in layered structure, may offer advantages over the individual powders. In this case, mechanical properties of the resulting layered structure could be improved. Consequently, investigation into mechanical and metallurgical properties of the resulting structure is necessary. High Velocity Oxy-Fuel coating of Diamalloy 2002 [(WC12Co)50,Ni33Cr9Fe3.5Si2B2C0.5] powders and Diamalloy 4010 [Fe68Mo30Cr1.8Mn0.2] powders as well as two-layered coatings consisting of these powders was carried out. In the two-layered structure, Diamalloy 4010 was sprayed at the substrate surface while Diamalloy 2002 was sprayed on the top of Diamalloy 4010 coating. The coating microstructure and morphology were examined using optical microscope, Scanning Electron Microscope (SEM) and Energy Dispersive Spectroscopy (EDS). The indentation tests were carried out to evaluate the microhardness and surface elastic modulus of the resulting coatings. The mechanical properties of the coatings were examined through tensile and three-point bending tests. It was found that the coating produced for Diamalloy 2002 resulted in higher hardness than that corresponding to Diamalloy 4010. The failure mechanism of coating during tensile and three-point bending tests was mainly crack formation and propagation in the coating. The elastic modulus of coating produced from Diamalloy 2002 was higher than that of Diamalloy 4010 coating, which was due to the presence of 12% WC in the coating. The irregularities observed in the elastic limit of the curves indicated the formation of cracks in the coatings, which was particularly true for two layered coating. The shear stress developed at interface of the two-layered coating was responsible for the crack initiation in the coating. The deep cracks were also formed in the coatings after the tensile tests. This was attributed to the local stress centers, which increased the stress intensity under the tensile load
Investigation into coatings produced from nanoparticle blended feedstock for rotating equipment repair applications
No full textCoating of carbon steel with conventional and nano particle blended feedstock material is considered in relation to repair applications of rotating equipment. Gas Metal Arc Welding (GMAW) and Wire Arc Spray (WAS) processes are used to produce the coatings on carbon steel workpieces. The wire arc sprayed workpieces are heat treated at temperature similar to the operating temperature of hot-path components of power gas turbines. The microstructure and metallurgy of the workpieces are examined using the Scanning Electron Microscope (SEM), Optical Microscope, Energy Dispersive Spectroscopy (EDS), X-ray Diffraction (XRD). The indentation tests are carried out to assess the microhardness variation across the coatings. In the case of coatings produced by GMAW, it is found that fine structures are formed in the coating due to the presence of nano particles and they resulted in increased microhardness of the coatings. In the case of the wire arc sprayed workpieces, the formation of dimples like structure at the surface increases the surface roughness of the coatings. In addition, the microhardness of the resulting coating is significantly higher than that of the base material. The heat treatment does not alter the microstructure and microhardness of the coatings significantly
- …
