New Mediterranean biodiversity records (March 2016)

In this Collective Article on “New Mediterranean Biodiversity Records”, we present additional records of species found in the Mediterranean Sea. These records refer to eight different countries mainly throughout the northern part of the basin, and include 28 species, belonging to five Phyla. The findings per country include the following species: Spain: Callinectes sapidus and Chelidonura fulvipunctata; Monaco: Aplysia dactylomela; Italy: Charybdis (Charybdis) feriata, Carcharodon carcharias, Seriola fasciata, and Siganus rivulatus; Malta: Pomacanthus asfur; Croatia: Lagocephalus sceleratus and Pomadasys incisus; Montenegro: Lagocephalus sceleratus; Greece: Amathia (Zoobotryon) verticillata, Atys macandrewii, Cerithium scabridum, Chama pacifica, Dendostrea cf. folium, Ergalatax junionae, Septifer cumingii, Syphonota geographica, Syrnola fasciata, Oxyu- richthys petersi, Scarus ghobban, Scorpaena maderensis, Solea aegyptiaca and Upeneus pori; Turkey: Lobotes surinamensis, Ruvettus pretiosus and Ophiocten abyssicolum. In the current article, the presence of Taractes rubescens (Jordan & Evermann, 1887) is recorded for the first time in the Mediterranean from Italy. The great contribution of citizen scientists in monitoring biodiversity records is reflected herein, as 10% of the authors are citizen scientists, and contributed 37.5% of the new findings.peer-reviewe

On the Existence of Undistorted Progressive Waves (UPWs) of Arbitrary Speeds 0≤v<∞0 \leq v< \infty in Nature

We present the theory, the experimental evidence, and fundamental physical consequences concerning the existence of families of undistorted progressive waves (UPWs) of arbitrary speeds $0\leq v < \infty$, which are solutions of the homogeneous wave equation, Maxwell equations, and Dirac and Weyl equations.Comment: 77 pages, Latex article, with figures. Includes corrections to the published versio

New Mediterranean biodiversity records (October, 2014)

The Collective Article 'New Mediterranean Biodiversity Records' of the Mediterranean Marine Science journal offers the means to publish biodiversity records in the Mediterranean Sea. The current article is divided in two parts, for records of alien and native species respectively. The new records of alien species include: the red alga Asparagopsis taxiformis (Crete and Lakonikos Gulf, Greece); the red alga Grateloupia turuturu (along the Israeli Mediterranean shore); the mantis shrimp Clorida albolitura (Gulf of Antalya, Turkey); the mud crab Dyspanopeus sayi (Mar Piccolo of Taranto, Ionian Sea); the blue crab Callinectes sapidus (Chios Island, Greece); the isopod Paracerceis sculpta (northern Aegean Sea, Greece); the sea urchin Diadema setosum (Gökova Bay, Turkey); the molluscs Smaragdia souverbiana, Murex forskoehlii, Fusinus verrucosus, Circenita callipyga, and Aplysia dactylomela (Syria); the cephalaspidean mollusc Haminoea cyanomarginata (Baia di Puolo, Massa Lubrense, Campania, southern Italy); the topmouth gudgeon Pseudorasbora parva (Civitavecchia, Tyrrhenian Sea); the fangtooth moray Enchelycore anatina (Plemmirio marine reserve, Sicily); the silver-cheeked toadfish Lagocephalus sceleratus (Saros Bay, Turkey; and Ibiza channel, Spain); the Indo-Pacific ascidian Herdmania momus in Kastelorizo Island (Greece); and the foraminiferal Clavulina multicamerata (Saronikos Gulf, Greece). The record of L. sceleratus in Spain consists the deepest (350-400m depth) record of the species in the Mediterranean Sea. The new records of native species include: first record of the ctenophore Cestum veneris in Turkish marine waters; the presence of Holothuria tubulosa and Holothuria polii in the Bay of Igoumenitsa (Greece); the first recorded sighting of the bull ray Pteromylaeus bovinus in Maltese waters; and a new record of the fish Lobotes surinamensis from Maliakos Gulf.peer-reviewe

Image of a static current loop over a superconducting sphere

The authors consider the boundary value problem in which the normal component of the magnetic field is zero at a spherical surface of radius α around the origin. They assume the source of the magnetic field to be a static current loop of radius ρ1, whose center is on the z axis and lies in the plane z = z1. The field inside the sphere is null. The field outside the sphere is solved by replacing the sphere by one image loop of radius ρ2, whose center is on the z axis and lies in the plane z = z2. The parameters of the image loop are derived by direct computation of the field at the spherical surface by using the Biot-Savart law. The present solution is related to the well-known image solution for a point charge over an equipotential sphere.link_to_subscribed_fulltex

SIMULTANEOUS INVERSION OF RADIALLY VARYING CONDUCTIVITY AND PERMITTIVITY PROFILES.

A hybrid approach to inversion is described that combines the method of characteristics with optimization. In order to test the inversion algorithm, synthetic data was generated by solving the forward problem for the case of a stepwise changing profile. The synthetic data is then input to the inversion algorithm, and the recovered profile is compared to original one for which the forward problem was solved. Numerical experiments with the simplest possible case, a constant tau and stepwise changing sigma , have worked satisfactorily. A simulation is illustrated. Inverting more than one parameter describing the function tau (p) has proven to be possible, but ill-conditioned. The following conjectures are based on extensive numerical experiments; they have not been proved or disproved analytically: The simultaneous inversion of general c(p) and tau (p) profiles from the Cauchy data taken over a finite time interval, for two vertical wave numbers, is generally ill-conditioned; however, if the loss is unknown only up to one parameter, the time-domain inversion procedure described here recovers the one parameter loss and c(p) is a fairly stable manner.link_to_subscribed_fulltex

Advances in lithography: Introduction to the feature. Editorial

Optical projection lithography has been the key technology for the ongoing miniaturization in semiconductor devices over the past 40 years. This issue features original research covering mask and image modeling methods and computational techniques for various inverse problems in advanced lithography, including source and mask optimization, wavefront retrieval, and design of Fresnel lenses

DME/DME Konum ve Hız Kestirimi

26th IEEE Signal Processing and Communications Applications Conference (2018 : Izmir, Turkey)As an alternative to Global Positioning System (GPS) position calculation can be achieved using Distance Measuring Equipments (DME). DME calculates and outputs a slant range using the total time from the aircraft interrogation to ground station reply. It is necessary to have two DMEs to calculate the position from the slant range data. In this paper, the algorithms are explained that achieve to estimate instantaneous latitude, longitude, altitude and velocity of an aircraft using the slant range data of two DMEs and the altitude data of an altimeter. The algorithms are based on the least squares method and Kalman filter. It is achieved to estimate position with the least squares method. Moreover, with the proposed model for the Kalman filter, the position and velocity estimation is achieved. The algorithms were tested on the previously recorded real aircraft data and their results were within the aviation standards. Furthermore, a plugin was implemented for X-plane flight simulator and the algorithms were capable of estimating instantaneous position and velocity successfully. © 2018 IEEE