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Topic Review
Wapama (Steam Schooner)
Wapama, also known as Tongass, was a vessel last located in Richmond, California. She was the last surviving example of some 225 wooden steam schooners that served the lumber trade and other coastal services along the Pacific Coast of the United States . She was managed by the National Park Service at San Francisco Maritime National Historical Park until dismantled in August 2013. Wapama was designated a National Historic Landmark in 1984; the designation was withdrawn in 2015.
  • 283
  • 29 Nov 2022
Biography
Walter Riedel
Walter J H "Papa" Riedel ("Riedel I") was a German engineer who was the head of the Design Office of the Army Research Centre Peenemünde and the chief designer of the A4 (V-2) ballistic rocket.[1][2] The crater Riedel on the Moon was co-named for him and the German rocket pioneer Klaus Riedel. Employed by the Heylandt Company from 27 February 1928, in December 1929, Riedel was assigned respo
  • 449
  • 26 Dec 2022
Biography
Walter Lachenmeier
Walter Lachenmeier (ORCID 0000-0002-6097-729X) was born in the city of Lüneburg, Germany, on 8 September 1945. He studied mechanical engineering and general process engineering from 1965 to 1971 at the University of Karlsruhe (the predecessor of the current Karlsruhe Institute of Technology, an elite public research university in Germany) and graduated in 1971 with a diploma degree in chemical
  • 571
  • 06 Sep 2022
Biography
Walter Cunningham
Ronnie Walter Cunningham (born March 16, 1932), (Col, USMCR, Ret.) is a retired American astronaut. In 1968, he was a Lunar Module Pilot on the Apollo 7 mission. He was NASA's third civilian astronaut (after Neil Armstrong and Elliot See), and has also been a fighter pilot, physicist, entrepreneur, venture capitalist, and author of The All-American Boys. Cunningham was born in Creston, Iowa
  • 462
  • 23 Nov 2022
Biography
Walt Havenstein
Walter Perry "Walt" Havenstein (born April 24, 1949)[1] is an American businessman, engineer, and former United States Marine. He was the Republican nominee for Governor of New Hampshire in 2014. Havenstein is the son of Kathryn McKay (Creech) and Paul Lieder Havenstein, CDR, USN.[2][3][4] He graduated from the United States Naval Academy with a bachelor's degree in aerospace engineering and
  • 526
  • 29 Dec 2022
Biography
Wally Timm
Wally Timm (August 8, 1896 – April 29, 1978) was an American aircraft designer, pilot and manufacturer. Wally Timm was born in Lakefield, Minnesota, and with his family moved to Windom, Minnesota. He worked closely alongside his brother Otto Timm in the early days of aviation and was a pioneer in Hollywood films. Timm started in aviation as early as 1910.[1] Along with his brothers, Otto
  • 267
  • 21 Nov 2022
Topic Review
Wall System with Dynamic Thermal Insulation
Dynamic thermal insulation systems (DTISs) can adapt to external environment conditions and help to reduce energy consumption and increase occupants’ thermal comfort, contributing towards the mitigation of overheating. DTISs adjust their configuration to optimize heat transfer through the façade. 
  • 219
  • 13 Oct 2023
Topic Review
Walking Recognition in Mobile Devices
Presently, smartphones are used more and more for purposes that have nothing to do with phone calls or simple data transfers. One example is the recognition of human activity, which is relevant information for many applications in the domains of medical diagnosis, elderly assistance, indoor localization, and navigation. The information captured by the inertial sensors of the phone (accelerometer, gyroscope, and magnetometer) can be analyzed to determine the activity performed by the person who is carrying the device, in particular in the activity of walking. Nevertheless, the development of a standalone application able to detect the walking activity starting only from the data provided by these inertial sensors is a complex task. This complexity lies in the hardware disparity, noise on data, and mostly the many movements that the smartphone can experience and which have nothing to do with the physical displacement of the owner. In this work, we explore and compare several approaches for identifying the walking activity. We categorize them into two main groups: the first one uses features extracted from the inertial data, whereas the second one analyzes the characteristic shape of the time series made up of the sensors readings. Due to the lack of public datasets of inertial data from smartphones for the recognition of human activity under no constraints, we collected data from 77 different people who were not connected to this research. Using this dataset, which we published online, we performed an extensive experimental validation and comparison of our proposals.
  • 997
  • 01 Nov 2020
Topic Review
Walkability of Large Parking Lots on University Campuses
Car-dominated university campuses allocate large areas of land for parking lots, which are major hubs for users to start and end their daily walking trips.
  • 187
  • 12 May 2023
Topic Review
Waka (Canoe)
Waka (Māori: [ˈwaka]) are Māori watercraft, usually canoes ranging in size from small, unornamented canoes (waka tīwai) used for fishing and river travel to large, decorated war canoes (waka taua) up to 40 metres (130 ft) long. The earliest remains of a canoe in New Zealand were found near the Anaweka estuary in a remote part of the Tasman District and radiocarbon-dated to about 1400. The canoe was constructed in New Zealand, but was a sophisticated canoe, compatible with the style of other Polynesian voyaging canoes at that time. Since the 1970s about eight large double-hulled canoes of about 20 metres have been constructed for oceanic voyaging to other parts of the Pacific. They are made of a blend of modern and traditional materials, incorporating features from ancient Melanesia, as well as Polynesia.
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  • 13 Oct 2022
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