Wyniki wyszukiwania dla: UNDERWATER ARCHAEOLOGY
-
Journal of Open Archaeology Data
Czasopisma -
Journal of Island & Coastal Archaeology
Czasopisma -
Journal of Community Archaeology and Heritage
Czasopisma -
Papers from the Institute of Archaeology
Czasopisma -
Jordan Journal for History and Archaeology
Czasopisma -
Journal of Computer Applications in Archaeology
Czasopisma -
Research and development on underwater acoustic systems at Polish Naval Academy and Gdansk University of Technology for the Polish Navy
PublikacjaWe wstępie artykułu wymieniono korzystne aspekty prawie pięćdziesięcioletniej współpracy obu Uczelni z polską Marynarką Wojenną. W dalszych częściach omówiono prace z dziedziny hydroakustyki wykonywane na rzecz Marynarki Wojennej w ciągu ostatnich dziesięciu lat. W Akademii MW w tym okresie były to głównie prace związane z pomiarami i analizami hydroakustycznych pól okrętów wraz z aplikacjami technicznymi tych analiz oraz aplikacje...
-
Hydroacoustic System in a Biomimetic Underwater Vehicle to Avoid Collision with Vessels with Low-Speed Propellers in a Controlled Environment
Publikacja -
Reliable OFDM Data Transmission with Pilot Tones and Error-Correction Coding in Shallow Underwater Acoustic Channel
PublikacjaThe performance of Underwater Acoustic Communication (UAC) systems are strongly related to the specific propagation conditions of the underwater channel. Horizontal, shallow-water channels are characterised by extremely disadvantageous transmission properties, due to strong multipath propagation and refraction phenomena. The paper presents the results of communication tests performed during a shallow, inland-water experiment with...
-
MSIS sonar image segmentation method based on underwater viewshed analysis and high-density seabed model
PublikacjaHigh resolution images of Mechanically Scanned Imaging Sonars can bring detailed representation of underwater area if favorable conditions for acoustic signal to propagate are provided. However to properly asses underwater situation based solely on such data can be challenging for less than proficient interpreter. In this paper we propose a method to enhance interpretative potential of MSIS image by dividing it in to subareas depending...
-
A Time Delay Controller Included Terminal Sliding Mode and Fuzzy Gain Tuning for Underwater Vehicle-Manipulator Systems
PublikacjaAn improved Time Delay Control (TDC) method for an Underwater Vehicle-Manipulator System (UVMS) is proposed. The proposed controller consists of three terms: a time-delay-estimation term that cancels nonlinearities of the UVMS dynamics, a Terminal Sliding Mode (TSM) term that provides a fast response and a PID term that reduces the tracking error. In addition the proposed controller uses fuzzy rules to adaptively tune the gains...
-
A New Direct-Sequence Spread Spectrum Signal Detection Method for Underwater Acoustic Communications in Shallow-Water Channel
PublikacjaDirect-Sequence Spread Spectrum (DSSS) is one of the modulation and coding techniques used in Underwater Acoustic Communication (UAC) systems for reliable data transmision even at low signal levels. However, in a shallow water channel, there is a strong multipath propagation which causes a phase fluctuation of the received signal, affecting the performance of the spread-spectrum system. The article presents a differential method...
-
Challenges associated with development of AUV - unmanned autonomous underwater vehicles to be operated using the AI-based control systems
PublikacjaThe last decade has been devoted towards further development of the UUV unmanned underwater vehicles which may be of two types. There are the USV unmanned surface vehicles and UUV unmanned underwater vehicles. There is a growing interest to work out and implement the fully advanced AUV autonomous underwater vehicles. The main drivers towards development of such the vehicles are the technologies of autonomous systems, sensors and...
-
Assessment of Wide-Sense Stationarity of an Underwater Acoustic Channel Based on a Pseudo-Random Binary Sequence Probe Signal
PublikacjaThe performances of Underwater Acoustic Communication (UAC) systems are strongly related to the specific propagation conditions of the underwater channel. Designing the physical layer of a reliable data transmission system requires a knowledge of channel characteristics in terms of the specific parameters of the stochastic model. The Wide-Sense Stationary Uncorrelated Scattering (WSSUS) assumption simplifies the stochastic description...
-
Mechanical and structural behavior of high-strength low-alloy steel pad welded by underwater wet welding conditions
PublikacjaThe aim of the paper was to determine the metallurgical and mechanical behaviors of a high-strength low-alloy (HSLA) steel pad-welded specimen used in the structures of industrial and naval parts. Then to predict the metallurgical consequences (nature of the phases present) and the mechanical properties (hardness and impact strength) of the pad-welded steel obtained by underwater wet welding with different heat input values. The...
-
An analytical four-layer horizontal electric current dipole model for analysing underwater electric potential in shallow seawater
PublikacjaThe paper presents a new analytical four‑layer (air–water–bottom–non‑conductive layer) horizontal electric dipole model which allows an accurate approximation of ship’s Underwater Electric Potential (UEP) from a sufficient depth in shallow coastal marine waters. The numerical methods, usually Finite Element Method (FEM) or Boundary Elements Method (BEM), are typically used to estimate the electric field and the distribution of...
-
LUNULA: archaeologia protohistorica
Czasopisma -
Archaeologia Historica Polona
Czasopisma -
Levant: Journal of the British School of Archaeology in Jerusalem and the British Institute at Amman for Archaeology and History
Czasopisma -
Performance of the Direct Sequence Spread Spectrum Underwater Acoustic Communication System with Differential Detection in Strong Multipath Propagation Conditions
PublikacjaThe underwater acoustic communication (UAC) operating in very shallow-water should ensure reliable transmission in conditions of strong multipath propagation, significantly disturbing the received signal. One of the techniques to achieve this goal is the direct sequence spread spectrum (DSSS) technique, which consists in binary phase shift keying (BPSK) according to a pseudo-random spreading sequence. This paper describes the DSSS...
-
Capra. The journal for Cave Archaeology and Palaeontology
Czasopisma -
Sicilia Antiqva. An International Journal of Archaeology
Czasopisma -
The Journal of Inner Asian Art and Archaeology
Czasopisma -
Journal of African Diaspora Archaeology and Heritage
Czasopisma -
PalArch's Journal of Archaeology of Egypt/ Egyptology
Czasopisma -
Digital Applications in Archaeology and Cultural Heritage
Czasopisma -
New Zealand Journal of Archaelogy
Czasopisma -
History, Archeology and Ethnography of the Caucasus
Czasopisma -
Development of a new generation of unmanned surface and underwater vehicles using the advanced technologies and achievements towards the application of control systems by the artificial intelligence AI.
PublikacjaThe operation of offshore structures at sea requires implementation of the advanced systems of permanent monitoring of work of such the installations. Novel solutions concerning such the systems should be associated with application of unmanned maritime surface and underwater platforms. The unmanned maritime platforms are and will be based on application of the newest achievements of some important technologies. Between these technologies...
-
Near Eastern Archaeology (formerly:The Biblical Archaeologist)
Czasopisma -
Before Farming: the archaeology and anthropology of hunter gatherers
Czasopisma -
Acta hyperborea: Danish Studies in Classical Archaeology
Czasopisma -
Journal of Eastern Mediterranean Archaeology and Heritage Studies
Czasopisma -
Asian Perspectives-The Journal of Archaeology for Asia and the Pacific
Czasopisma -
Time & Mind-The Journal of Archaeology Consciousness and Culture
Czasopisma -
Archaeologia Medii Aevi Finlandiae
Czasopisma -
Archaeologia Baltica
Czasopisma -
IA, Journal of the Society for Industrial Archeology
Czasopisma -
Environmental Archaeology
Czasopisma -
Tel Aviv: Journal of the Institute of Archaeology of Tel Aviv
Czasopisma -
Ancient Asia-Journal of the Society of South Asian Archaeology
Czasopisma -
Geodesy measurement techniques as an enrichment of archaeological research workflow
PublikacjaUse of geodesy techniques is widespread in different fields of science. Especially in such an emerging and dynamic branch of science as archaeology. Warsaw Institute of Archaeology, conducts many archaeological expeditions, among the others Polish-Georgian archaeological expedition in Gonio, where ancient Roman Bath has been discovered and excavated. Gonio is located in Adjara, Georgia, placed on the Black Sea coast. Fortress...
-
Journal of African Archaeology
Czasopisma -
European Journal of Archaeology
Czasopisma -
Journal of Field Archaeology
Czasopisma -
Forum Archaeologiae. Zeitschrift fuer klassische Archaeologie
Czasopisma -
Bulgarsko e-Spisanie za Arkheologiya-Bulgarian e-Journal of Archaeology
Czasopisma -
Archaeologia Polona
Czasopisma -
Jacek Marszal dr hab. inż.
OsobyDr hab. inż. Jacek Marszal, prof. nadzw. PG ukończył w roku 1977 studia magisterskie na Wydziale Elektroniki Politechniki Gdańskiej w zakresie Aparatury Elektronicznej. W 1989 r. uzyskał stopień doktora nauk technicznych w dyscyplinie Telekomunikacja, a w roku 2014 stopień doktora habilitowanego w tej samej dyscyplinie. Jego specjalnością naukową jest hydroakustyka. Bezpośrednio po ukończeniu studiów rozpoczął pracę na Wydziale...
-
Justyna Borucka dr inż. arch.
OsobyJustyna Borucka jest adiunktem na Wydziale Architektury Politechniki Gdańskiej, koordynatorem programu Erasmus i współpracy zagranicznej, a od 2016 roku prodziekanem ds. rozwoju. Jest również członkiem Zarządu Stowarzyszenia Architektów Polskich (SARP Oddział Wybrzeże). Jej badania koncentrują się na teorii architektury i strategii odnowy miejskiej ze szczególnym wpływem interdyscyplinarnych relacji współczesnej architektury i...