Results 161 to 170 of about 2,570 (205)

Is clinical experience important for obtaining the primary stability of dental implants with aggressive threads? An ex vivo study. [PDF]

Med Oral Patol Oral Cir Bucal, 2019
Geckili O, Bilhan H, Geckili E, Barca-Dayan E, Dayan C, Dayan C, Bural C.   +6 more
europepmc   +1 more source

First stage in technological production of Stone Age animal teeth pendants: evidence from Zvejnieki (Latvia) and wider social implications. [PDF]

Archaeol Anthropol Sci
Macāne A, Nordqvist K, Mannermaa K, Needham A, Pomstra D, Alcobendas GC, Reblis J, Zagorska I, Little A.   +8 more
europepmc   +1 more source

Mechanism of Rock Mass Detachment Using Undercutting Anchors: A Numerical Finite Element Method (FEM) Analysis. [PDF]

Materials (Basel)
Wójcik A, Jonak K, Karpiński R, Jonak J, Kalita M, Prostański D.   +5 more
europepmc   +1 more source

Influence of Surface Preparation of Aluminum Alloy AW-5754 and Stainless Steel X5CRNI18-10 on the Properties of Bonded Joints. [PDF]

Materials (Basel)
Zdravković N, Klobčar D, Milčić D, Zupančič M, Žužek B, Milčić M, Đurić A.   +6 more
europepmc   +1 more source

Environmental Changes Recorded in Sedimentary Rocks in the Clay-Sulfate Transition Region in Gale Crater, Mars: Results From the Sample Analysis at Mars-Evolved Gas Analysis Instrument Onboard the Mars Science Laboratory Curiosity Rover. [PDF]

J Geophys Res Planets
Clark JV, Sutter B, McAdam AC, Lewis JMT, Franz H, Archer PD, Chou L, Eigenbrode J, Knudson C, Stern J, Glavin D, Steele A, House CH, Schroeder J, Berger J, Rampe EB, Simpson S, Tutolo B, Milliken RE, Malespin C, Mahaffy P, Vasavada A.   +21 more
europepmc   +1 more source

Modelling laser percussion drilling

, 2004
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Oilfield Percussion Drilling

SPE California Regional Meeting, 1961
Abstract Advancements in tools and technology for air drilling have been quite numerous. One of the more publicized tools in recent years has been the air-rotary-percussion drill. This paper is prepared to evaluate the tool performance and to indicate problem areas where the tool may be used to the greatest ...
F.W. Smith, Wink Kopczynski
openaire   +1 more source

Dry Friction Model of Percussive Drilling

Meccanica, 1999
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Krivtsov, Anton M., Wiercigroch, Marian
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Percussion Drilling Machine

2001
Commercial percussion drilling machines possess for their operation in the percussion drill mode two cam disks with some teeth. By moving the upper disk at the motor side with constant angular speed, for example, and by pressing the drill into the material, a hammering process is started that consists of a combined drill/impact motion. Machines of that
openaire   +1 more source