In this paper, a derivation method is presented for the valid contracted graphs (CGs) with pentagonal links plus quaternary Q and ternary T using starting vertax arrays strings (SVASs) type synthesis of parallel mechanisms. First, some concepts on CGs, array (SVASs), basic (BCGs) are explained. Second, deriving CGs according to BCGs SVASs. According connections vertax, SVASs obtained. Then, pri...

The Quchan fault is located in Quchan - Shirvan area which is a part of Chenaran- Bojnourd plain in Kopeh-Dagh zone, NE Iran. The Quchan active fault with northwest – southeast trending is one of the most important strike-slip faults in the area which its activity led to the numerous historical and instrumental earthquakes. The Neo-tectonic activities of this fault are investigated by the drain...

Recently proposed bounds for the Marcum Q-function are applied to derive novel tight bounds for the bit error rate for differential quaternary phase shift keying transmission with Gray coding over an additive white Gaussian noise channel. Simple and accurate approximations are then proposed for the BER. The computational complexity of the final approximate expression is significantly lower than...

First posted April 5, 2023 For additional information, contact: Contact Information,Geology, Minerals, Energy, & Geophysics Science CenterMenlo Park, CaliforniaU.S. Geological SurveyBuilding 19, 350 N. Akron Rd.P.O. Box 158Moffett Field, CA 94035 This preliminary geologic map presents mapping of the Leuhman Ridge area Edwards Air Force Base, California, conducted between 2020 and June 2021. The...

springs are the important water resources, which thier study is necessary in terms of their management and exploitation. in northern iran, the karst springs locate in the central alborz highlands and alluvial springs on the caspian southern coasts.the karst and alluvial springs discharge is variable because of different conditions in terms of aquifer, topography and precipitation .this study ha...

The outcropping Cretaceous siliciclastic sediments in the Al Bauga area in Northern Sudan reach a maximum thickness of about 30 meter. They rest with angular unconformity on tilted Precambrian basement rocks and are capped by Tertiary-Quaternary basalts forming a type of nonconformity. The sedimentary sequence was subdivided into three major units separated by two disconformities. The lower uni...