Divided skates.

Mode of access: Internet.

The mechanics of continuous roller bending of plates

This research initiates a study of the mechanics of four roll plate bending and provides a methodology to investigate the process experimentally. To carry out the research a suitable model bender was designed and constructed. The model bender was comprehensively instrumented with ten load cells, three torquemeters and a tachometer. A rudimentary analysis of the four roll pre-bending mode considered the three critical bending operations. The analysis also gave an assessment of the model bender capacity for the design stage. The analysis indicated that an increase in the coefficient of friction in the contact region of the pinch rolls and the plate would reduce the pinch resultant force required to end a plate to a particular bend radius. The mechanisms involved in the four roll plate bending process were investigated and a mathematical model evolved to determine the mechanics of four roll thin plate bending. A theoretical and experimental investigation was conducted for the bending of HP30 aluminium plates in both single and multipass bending modes. The study indicated that the multipass plate bending mechanics of the process varied according to the number of bending passes executed and the step decrement of the anticipated finished bend radius in any two successive passes (i.e. the bending route). Experimental results for single pass bending indicated that the rollers normally exert a higher bending load for the steady-continous bending with the pre-inactive side roll oper?tive. For the pre-bending mode and the steady-continous bending mode with the pre-active side roll operative, the former exerted the higher loads. The single pass results also indicated that the force on the side roll, the torque and power steadily increased as the anticipated bend radius decreased. Theoretical predictions for the plate internal resistance to accomplish finished bend radii of between 2500mm and 500mm for multipass bending HP30 aluminium plates, suggested that there was a certain bending route which would effectively optimise the bender capacity.

Professional roller derby

General note: Title and date provided by Bettye Lane.

Professional roller derby

General note: Title and date provided by Bettye Lane.

Members of the "Red Devils" roller derby team at Madison Square Garden

General note: Title and date provided by Bettye Lane.

Professional roller derby

General note: Title and date provided by Bettye Lane.

Ann Phillips, the only woman on the NY Nationals Roller Hockey team

General note: Title and date provided by Bettye Lane.

Professional roller derby

General note: Title and date provided by Bettye Lane.

Professional roller derby player for the Red Devils, #14 Francine Cerker

General note: Title and date provided by Bettye Lane.

Roller derby at Madison Square Garden

General note: Title and date provided by Bettye Lane.

Are critically endangered fish back on the menu? Analysis of U.K. fisheries data suggest post-ban landings of prohibited skates in European waters

Skates (Rajidae) have been commercially exploited in Europe for hundreds of years with some species’ abundances declining dramatically during the twentieth century. In 2009 it became “prohibited for EU vessels to target, retain, tranship or land” certain species in some ICES areas, including the critically endangered common skate and the endangered white skate. To examine compliance with skate bans the official UK landings data for 2011–2014 were analysed. Surprisingly, it was found that after the ban prohibited species were still reported landed in UK ports, including 9.6 t of common skate during 2011–2014. The majority of reported landings of common and white skate were from northern UK waters and landed into northern UK ports. Although past landings could not be validated as being actual prohibited species, the landings’ patterns found reflect known abundance distributions that suggest actual landings were made, rather than sporadic occurrence across ports that would be evident if landings were solely due to systematic misidentification or data entry errors. Nevertheless, misreporting and data entry errors could not be discounted as factors contributing to the recorded landings of prohibited species. These findings raise questions about the efficacy of current systems to police skate landings to ensure prohibited species remain protected. By identifying UK ports with the highest apparent landings of prohibited species and those still landing species grouped as'skates and rays’, these results may aid authorities in allocating limited resources more effectively to reduce landings, misreporting and data errors of prohibited species, and increase species-specific landing compliance.

Are critically endangered fish back on the menu? Analysis of U.K. fisheries data suggest post-ban landings of prohibited skates in European waters

Skates (Rajidae) have been commercially exploited in Europe for hundreds of years with some species’ abundances declining dramatically during the twentieth century. In 2009 it became “prohibited for EU vessels to target, retain, tranship or land” certain species in some ICES areas, including the critically endangered common skate and the endangered white skate. To examine compliance with skate bans the official UK landings data for 2011–2014 were analysed. Surprisingly, it was found that after the ban prohibited species were still reported landed in UK ports, including 9.6 t of common skate during 2011–2014. The majority of reported landings of common and white skate were from northern UK waters and landed into northern UK ports. Although past landings could not be validated as being actual prohibited species, the landings’ patterns found reflect known abundance distributions that suggest actual landings were made, rather than sporadic occurrence across ports that would be evident if landings were solely due to systematic misidentification or data entry errors. Nevertheless, misreporting and data entry errors could not be discounted as factors contributing to the recorded landings of prohibited species. These findings raise questions about the efficacy of current systems to police skate landings to ensure prohibited species remain protected. By identifying UK ports with the highest apparent landings of prohibited species and those still landing species grouped as'skates and rays’, these results may aid authorities in allocating limited resources more effectively to reduce landings, misreporting and data errors of prohibited species, and increase species-specific landing compliance.

Sex, normer, roller och ideal : En komparativ textanalys om mäns och kvinnors sexualitet inom islam

Denna studie har haft som syfte att undersöka hur mäns och kvinnors roller, sexualitet och ideal inom en muslimsk kontext ser ut. Detta gjordes genom en analys av tre olika böcker, vilka hade tre olika perspektiv och var producerade under tre olika tidsperioder. Böckerna var Den doftande trädgården från år 1966, vilket var det orientalistiska perspektivet, The muslim marriage guide från år 1995, vilket var det neo-traditionella perspektivet samt Sexual Ethics and Islam från år 2006, vilket var det feministiska perspektivet. För att kunna undersöka dessa böcker analyserades dem utifrån verktyg från lingvistisk och visuell textanalys samt kategoriserades och komparerades. Resultatet blev att böckerna både hade likheter och skillnader gällande mäns och kvinnors roller, sexualitet och ideal. Kvinnor framställdes genom feminina egenskaper som omsorgsfull, hemmafru, vacker och sexuell tillgänglighet, medan män framställdes genom maskulina egenskaper som ledare, styrka, ansvarsfull och sexuell skicklighet. Män kunde också oftare ses som önskvärda deltagare och utföra fler handlingar än kvinnor. I vissa delar av materialet förekom även orientalistiska framställningar.