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Ricochet quantification using a multiple sensor approach

Defence Technology（防务技术） 2021年第2期17卷 305-314页

作者： Michael Muster amer hameed David Wood Centre for Defence Engineering Cranfield UniversityDefence Academy of the United KingdomShrivenhamSN68LAUK

This study investigates the ricochet behaviour of three different small-arms projectile types using a novel ricochet measuring *** results can be used to estimate the danger potential of ricochets on shooting ranges.A ricochet is the change of direction and velocity of a projectile after impacting an oblique *** impact produces strong vibrations on a rigid *** this impact,flexural waves travel radially outwards from the point of *** waves are used to determine the properties of the impactor with accelerometers situated on the target *** the use of two measurement plates,one can produce a ricochet and detect the velocity at the same *** are suitable for accurate momentum measurements of single ***,depending upon strike velocity and the impact angle,a ricochet can separate in multiple fragments after being *** the operational safety perspective,these fragments need to be detected,as *** approach of a coupled sensor concept was chosen to solve this *** sensors were additionally used to visualise the heat which is produced after penetrating a rubber layer pasted in front of the steel target *** this approach one was able to detect the position of *** investigations showed that the measurement system performance is better with a multiple sensor design,which includes accelerometers for the velocity,impact strength and partly the position measurement,while the thermographic sensor was used for the position measurement and partly the momentum *** investigated ammunition showed plausible fragmentation behaviour,and the results can already be used to estimate the danger potential of different ammunition *** projectiles fragment to small particles already after being deflected under a small ***,Full Metal Jacket projectiles with or without a steel core do not fragment under angles which are less than 5.The objective of the pa

关键词： Ricochet analysis Small-calibre ammunition Velocity measurement Thermography

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A review of dual-spin projectile stability

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Defence Technology（防务技术） 2020年第1期16卷 1-9页

作者： James Norris amer hameed John Economou Simon Parker Centre for Defence Engineering Cranfield UniversityDefence Academy of the United KingdomShrivenhamSN68LA United Kingdom BAE Systems United Kingdom

This paper gives a succinct review of dual-spinprojectile stability and some technologies relating to *** describes how the traditional stability factors from linear projectile theory are modified to better describe a controlled dual-spin ***,it reviews works which have investigated how different aspects of a controlled dual-spin design can affect flight stability,primarily airframe structure and canard properties.A conclusion is given,highlighting important guidelines from the enclosed discussions.

关键词： Guided projectiles Dual-spin Gyroscopic Dynamic Stability Canards

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A comparison of the ballistic behaviour of conventionally sintered and additively manufactured alumina

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Defence Technology（防务技术） 2020年第2期16卷 275-282页

作者： Gareth James Appleby-Thomas Kevin Jaansalu amer hameed Jonathan Painter James Shackel Julie Rowley Centre for Defence Engineering Cranfield Defence and SecurityCranfield UniversityShrivenhamSwindonSN68LAUK Department of Chemistry and Chemical Engineering Royal Military College of CanadaPO Box 17000Station ForcesKingstonOntarioK7K 7B4Canada

Production of ceramic armour solutions on-demand/in-theatre would have significant logistical and military ***,even assuming that such technologies could be successfully deployed in the field,such near net-shape manufacturing technology is relatively immature compared to conventional sintering of *** this study,the ballistic performance of a series of additively manufactured(AM)/rapidly-prototyped(RP)alumina tiles of 97.2%of the density of Sintox FATM were investigated using both forward-and reverse-ballistic *** experiments,undertaken with compressed gasguns,employed the depth-of-penetration technique and flash X-ray as primary diagnostics to interrogate both efficiency of penetration and projectile-target interaction,*** RP alumina was found to exhibit useful ballistic properties,successfully defeating steel-cored(AP)7.62×39 mm BXN rounds at velocities of up-to c.a.850 m/s,while exhibiting comparable failure modes to conventionally sintered armour-grade Sintox ***,where a<1%by *** dopant was introduced into the RP material failure modes changed dramatically with performance dropping below that of conventionally sintered ***,the results from both sets of experiments were complimentary and clearly indicated the potential of such RP materials to play an active role in provision of real-world body armour solutions provided quality control of the RP material can be maintained.

关键词： Additive manufacture Rapidly prototyped Body armour Ballistics Ceramics

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Experimental investigation of a cook-off temperature in a hot barrel

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Defence Technology（防务技术） 2014年第2期10卷 86-91页

作者： amer hameed Mathew AZAVEDO Philip PITCHER Centre for Defence Engineering Cranfield UniversityDefence Academy of the United Kingdom Cranfield University Defence Academy of the United Kingdom

The experimental investigations of the effect of contact time/temperature on initiating the cook-off using 7.62 mm calibre cartridge cases(CC) were conducted *** cartridges were hlled with commercial off-the-shelf(COTS) double based(DB) propellant(Bulls Eye)and were loaded in a hot *** thermal explosion temperature is of great significance to both weapon designers and safety inspectors as it provides the operational limit and safe operating *** CC under test,it was found that the cook-off temperatures of this propellant were encountered with the heat transfer profile of the simulated gun barrel between 151.4 ℃ and 153.4 ℃,with a reaction occurring in less than300 s after the round was ***,each experiment was found to be consistent and repeatable.

关键词：工作温度实验厨师接触时间 COTS 推进剂设计师检查员

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Hybrid Steering of Wheeled Wheels

Hybrid Steering of Wheeled Wheels

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FISITA 2012 World Automotive Congress--Volume 10：Chassis Systems and Integration Technology

作者： Muhammad Adeel Awan David Purdy amer hameed Cranfield University CranfieldUK

This paper is focussed to assess the performance of a low cost steer-bywire system developed in the Vehicle Dynamics Laboratory’ at Cranfield *** steering system plays an important role in vehicle’s safety by influencing its handling performance and therefore considered as a critical vehicle *** performance of a steer-by-wire system is predominantly linked to its actuators’ *** paper contains the findings of experiments carried out to measure the actuators’ *** the steering commands can be represented by step,sinusoidal and combination of such inputs therefore the actuators are subjected to similar sort of inputs with varying frequencies and *** the later part a controller is developed to improve the performance of the steering system using the torque vectoring technique.

关键词： Hybrid steer-Steer-by-wire Yaw-control LQR Vehicle model

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Gradient Valued Profiles and L/D Ratio of AI EFP with Modified Johnson Cook Model

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材料科学与工程（中英文版） 2011年第5期5卷 599-604页

作者： Ghulam Hussain Abdul Qadeer Malik amer hameed School of Chemical ＆ Materials Engineering （SCME） National University of Sciences ＆ Technology （NUST） Islamabad Pakistan Weapon Systems and Engineering Dynamics Group Defence Academy of the United Kingdom Cranfield University Shrivenham Swindon UK

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Elabela is a reliable biomarker for predicting early onset preeclampsia:A comparative study

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World Journal of Clinical Cases 2023年第17期11卷 3993-4002页

作者： Eham amer Ali Wassan Nori Alea Farhan Salman Taghreed S Saeed Al-Rawi Ban H hameed Raid M Al-Ani Department of Chemistry and Biochemistry Mustansiriyah UniversityBaghdad 10052Iraq Department of Obstetrics and Gynecology Mustansiriyah UniversityBaghdad 10052Iraq National Central of Hematology Mustansiriyah UniversityBaghdad 10052Iraq Department of Biochemistry University of Anbar College of MedicineRamadi City 31001AnbarIraq Department of Surgery/Otolaryngology University of Anbar College of MedicineUniversity of Anbar College of MedicineRamadi City 31001AnbarIraq

BACKGROUND Preeclampsia(PE)is a multisystemic metabolic disease with an undetermined *** is a worldwide cause of maternal and perinatal morbidity,subdivided into early(EoPE)and late-onset(LoPE)according to 34 wk of gestation as a *** researchers investigated biomarkers for predicting PE to halt its consequences on the feto-maternal ***(Ela)is a newly discovered peptide hormone that was implicated in PE *** rodent studies discussed Ela’s role in controlling blood ***,Ela deficiency was associated with PE *** To test whether plasma Ela could serve as a reliable marker for predicting PE based on the time of onset(EoPE vs LoPE)compared to age and body mass matched healthy controls since no definitive treatment exists for PE but to terminate a *** This case-control study recruited(n=90)pregnant who fulfilled inclusion criteria;they were allocated into three groups:EoPE(30/90)(9.156 with 96.7%and 93.3%sensitivity and specificity,P<0.0001 in predicting *** A strong correlation of serum Ela with PE parameters with excellent sensitivity and specificity in distinguishing EoPE independent of the BMI,age,and blood pr

关键词： Early onset preeclampsia Late-onset preeclampsia Prediction Elabela Preeclampsia Pregnant women

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National guidelines for the diagnosis and treatment of hilar cholangiocarcinoma

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World Journal of Gastroenterology 2024年第9期30卷 1018-1042页

作者： Faisal Saud Dar Zaigham Abbas Irfan Ahmed Muhammad Atique Usman Iqbal Aujla Muhammad Azeemuddin Zeba Aziz Abu Bakar Hafeez Bhatti Tariq Ali Bangash Amna Subhan Butt Osama Tariq Butt Abdul Wahab Dogar Javed Iqbal Farooqi Faisal Hanif Jahanzaib Haider Siraj Haider Syed Mujahid Hassan Adnan Abdul Jabbar Aman Nawaz Khan Muhammad Shoaib Khan Muhammad Yasir Khan amer Latif Nasir Hassan Luck Ahmad Karim Malik Kamran Rashid Sohail Rashid Mohammad Salih Abdullah Saeed Amjad Salamat Ghias-un-Nabi Tayyab Aasim Yusuf Haseeb Haider Zia Ammara Naveed Department of Hepatopancreatic Biliary Surgery&Liver Transplant Pakistan Kidney and Liver Institute&Research CentreLahore 54000Pakistan Department of Hepatogastroenterology and Liver Transplantation Dr.Ziauddin University HospitalKarachi 75600SindhPakistan University of Aberdeen Aberdeen B243FXUnited Kingdom Department of Pathology Pakistan Kidney and Liver Institute&Research CentreLahore 54000Pakistan Department of Gastroenterology&Hepatology Pakistan Kidney and Liver Institute&Research CentreLahore 54000Pakistan Department of Radiology Aga Khan UniversityKarachi 74800Pakistan Department of Oncology Hameed Latif HospitalLahore 54000Pakistan Division of Hepatopancreatic Biliary Surgery&Liver Transplantation Shifa International HospitalIslamabad 44000Pakistan Department of Hepatopancreatic Biliary Surgery&Liver Transplant Shaikh Zayed Hospital and Post Graduate Medical InstituteLahore 54000Pakistan Department of Medicine Aga Khan University HospitalKarachi 74800Pakistan Department of Liver Transplant Pir Abdul Qadir Shah Jeelani Institute of Medical SciencesGambat 66020Pakistan Department of Medicine&Gastroenterology Lifecare Hospital and Research CentrePeshawar 25000Khyber PakhtunkhwaPakistan Department of Hepatopancreatobiliary&Liver Transplant Bahria International HospitalLahore 54000Pakistan Department of Surgery Hepatopancreatobiliary&Liver TransplantDow University of Health SciencesKarachi 74800Pakistan Department of Gastroenterology Hepatology&NutritionPir Abdul Qadir Shah Jeelani Institute of Medical SciencesGambat 66020Pakistan Department of Oncology Dr.Ziauddin HospitalKarachi 74800Pakistan Department of Radiology Rehman Medical InstitutePeshawar 25000Pakistan Army Liver Transplant Unit Pak Emirates Military HospitalRawalpindi 46000Pakistan Department of Gastroenterology Sindh Institute of Urology and TransplantationKarachi 75500Pakistan Rashid Nursing Home and Cancer Clinic Rashid Nursing Home and Cancer ClinicRawalpindi 46000Pakistan Department of Gastroentero

A consensus meeting of national experts from all major national hepatobiliary centres in the country was held on May 26,2023,at the Pakistan Kidney and Liver Institute&Research Centre(PKLI&RC)after initial consultations with the *** Pakistan Society for the Study of Liver Diseases(PSSLD)and PKLI&RC jointly organised this *** effort was based on a comprehensive literature review to establish national practice guidelines for hilar cholangiocarcinoma(hCCA).The consensus was that hCCA is a complex disease and requires a multidisciplinary team approach to best manage these *** coordinated effort can minimise delays and give patients a chance for curative treatment and effective *** diagnostic and staging workup includes high-quality computed tomography,magnetic resonance imaging,and magnetic resonance *** cytology or biopsy utilizing endoscopic retrograde cholangiopancreatography is a mainstay for ***,histopathologic confirmation is not always required before *** ultrasound with fine needle aspiration of regional lymph nodes and positron emission tomography scan are valuable adjuncts for *** only curative treatment is the surgical resection of the biliary tree based on the Bismuth-Corlette *** patients with unresectable hCCA can be considered for liver *** chemotherapy should be offered to patients with a high risk of *** use of preoperative biliary drainage and the need for portal vein embolisation should be based on local multidisciplinary *** with acute cholangitis can be drained with endoscopic or percutaneous biliary *** chemotherapy with cisplatin and gemcitabine has shown improved survival in patients with irresectable and recurrent hCCA.

关键词： Hilar cholangiocarcinoma Bismuth-Corlette classification Memorial Sloan Kettering Cancer Centre Staging Preoperative biliary drainage Portal vein embolisation Surgical resection Hepatectomy

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