A friendly sequence is one in which successive terms differ by one. Since a friendly sequence may be a repeat on which a longer sequence is based, the first and last terms must be friendly so that repeats are friendly. Friendly sequences often make good candidates for threading and treadling sequences. And since they have alternating parity, they are applicable to weaves that have this requirem...

it is essential to make urban spaces usable for a wide range of citizens, including aged people. this study was carried out in sari, the center of mazandaran province, northern iran in 2013 to prioritize five urban parks of the city using fuzzy-ahp method in terms of three pre-defined criteria, including safety, security, and environmental health. firstly, the criteria and alternatives were def...

Progress in science has been marked through the ages by public airing of controversial issues. Indeed, the rewards for innovative progress have included banishment, imprisonment, casting out devils, and even burning at the stake (1). Those who dared to challenge prevailing concepts that matter was composed of four fundamental substances, earth, air, fire, and water (2), and that humors were ele...