237 research outputs found
Restoring Accountability in Freedom of Expression Theory: Public Libel Law and Radical Whig Ideology
As leading common law jurisdictions grapple with the Internet’s impact on defamation law, comparative legal scholarship has revealed long-standing problems with its underlying theoretical justifications. Specifically, public libel doctrine is commonly supported by appeals to democratic theory in the abstract. Accountability concerns most relevant to adjudicating public libel cases are thus routinely overlooked. This article aims to diagnose the causes of these theoretical inaccuracies, describe their impact on public libel law, and translate their significance for law reform. Through exploring eighteenth-century libertarian thought, we highlight the foundational importance of accountability and the checking function rationale to democratic theory and governance. An analysis of competing democratic models demonstrates significant undertheorizing that poses several problems for contemporary political speech and public interest defenses. This article suggests that, before proceeding precipitously with Internet-inspired reforms, we might benefit from reflecting upon defamation law’s impact on all aspects of our democratic values
EFFECT OF RUNNING SPEED AND SURFACE INCLINATION ON MUSCLE ACTIVATION DURING TREADMILL RUNNING BY WOMEN
The current study examined muscle activity of the biceps femoris (BF), semimembranosus (ST), vastus lateralis (VL), vastus medialis (VM), lateral gastrocnemius (GL), and medial gastrocnemius (GM) during treadmill running. Female college runners (n=15) ran at speeds of 1.79, 2.24, and 2.68 m·s-1 at 3 different grades of incline (0, 10, and 15%). Right leg Muscle activity was assessed via electromyography and normalized to maximal voluntary isometric contraction. Results indicated muscle activity increased with speed and grade except for SM which showed only grades of 0 and 15% being different; and that for GL and SM only 2.68 m·s-1 differed from other speeds. Muscles of the posterior thigh (BF and SM) were different from the posterior shank (GL and GM); while anterior thigh muscles (VL and VM) did not differ from the others. There were no differences in medial/lateral aspects
CHANGES IN RUNNING GAIT PARAMETERS DURING A 161 KM TRAIL RACE
The current study examined changes in running speed and technique during a 161 km trail race and their relationship to performance. Sixteen participants were video recorded during continuous running for each of the five 32 km loops of the race. Participant’s stride length (SL), stride rate (SR), and speed were calculated. Lap and finish times were also collated from the race results. All variables changed significantly during the race (i.e. Speed?, Lap time?, SL? and SR?). Increased consistency in stride rate and length across the five laps, as well as speed, correlated positively with performance. Increased stride length in laps one, two and four correlated positively with performance. Results indicated that fatigue during the race decreased both speed and SL. Better performers ran faster with a longer SL and were able to maintain their initial speed for longer
CONTACT TIME, JUMP HEIGHT, AND REACTIVE STRENGTH INDEX DURING DROP JUMPS IN WATER, ON PADDED AND NONPADDED CONDITIONS
Twelve athletes, who routinely used plyometric exercises, performed drop jumps from 46 cm in water, on padded (5 cm thick wrestling mat), and unpadded conditions. GRF
obtained via force platform and video analysis of markers placed along the leg were used to compare contact time (CT), flight time (FT), jump height calculated from flight time (JHFT) and video data (JHVIDEO), and reactive strength index (RSI) from both calculation
techniques (RSIFT and RSIVIDEO). One-way Repeated Measures ANOVA indicated significant difference in CT but not FT. Two-way Repeated Measures ANOVA indicated differences in calculation technique for JH and RSI. Results indicate faults in current
technique used to sample CT and JH when comparing plyometrics in and out of water
VISUAL FLOW DOES NOT ALTER MUSCLE ACTIVITY DURING TREADMILL WALKING OR RUNNING
The current study examined the effect of visual flow (patterns of visual movement of surroundings) on muscle activity during treadmill walking and running. Participants (n=14 walked (1 -39 m-s4) and ran (2.78 msl) in visual flow and control conditions. Activity of the vastus medalis (VM), biceps fernoris (BF), gluteus maximus (GM ), gastrocnemius (GA), tibialis anterior (TA), erector spinae (ES), mtus abdominis (RA), and C4 paraspinal (C4) were assessed via electromyography (EMG) during each condition. Repeated Measures ANOVA revealed EMG differences (p < 0.05) between walking and running for RA, VM, GM, and BF. There were no differences in speeds for the other muscles, or across the visual conditions for any of the muscles. Visual flow does not alter muscle activity during walking or running
New records of myxomycetes from high-elevation areas of Mexico and Guatemala
Surveys of four high-elevation study areas in central Mexico and northwestern Guatemala were
carried out to obtain baseline information on the species of myxomycetes present. All study areas
were sampled in 2006 and 2007. Both specimens that had fruited in the field and those obtained
from moist chamber cultures in the laboratory were considered. The myxomycetes recorded
included seven species that represented new records for Mexico and 35 species that were new for
Guatemala. Five of these were new records for the Neotropics. A list of these species and
information on the microhabitats in which they occurred is provided. This relatively limited study
clearly demonstrates that high-elevation areas in the Neotropics are still undersampled for
myxomycetes. For the majority of countries in the region, there are still information gaps relating to
distribution patterns of myxomycetes. In the context of biodiversity conservation, it is important to
continue studying groups of organisms such as myxomycetes in the rapidly changing Neotropical
ecosystems.National Science Foundation/[DEB-0316284]/NSF/Estados UnidosUCR::VicerrectorĂa de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de BiologĂ
RELIABILITY OF KNEE JOINT MEASURES IN A CUTTING MOVEMENT
Eight female soccer athletes performed six horizontal jump and cut maneuvers onto two AMTI force platforms. 3D kinematic analysis of 22 marked body landmarks coupled with ground reaction forces (GRF) were analyzed for peak knee flexion and valgus angles, GRF, and knee abduction moments with repeated measures ANOVA. Analysis indicated no significant difference between trials (p > 0.05). Average measures Intraclass Correlation Coefficients resulted in values of r = 0.71 to 0.99. Results indicate good reliability for flexion angles and excellent reliability for valgus angles, GRF, and knee abduction moments
EFFECT OF ACUTE FEEDBACK ON KNEE ANGLE AND MOMENTS DURING A HORIZONTAL LAND AND CUT MANEUVER
The purpose of this study was to assess the effect of acute feedback and preferred plant leg on peak knee flexion and valgus angle, ground reaction force (GRF), and abduction moment of the knee during a horizontal land and cut maneuver. Eight division II women soccer players randomly performed horizontal landing and cutting maneuvers: 3 left and 3 right cuts pre- and post-feedback. Feedback was provided according to previous research. ANOVA revealed lower knee valgus angles for the feedback and preferred plant leg conditions (p0.05). There were no differences in GRF or knee abduction moment. Acute feedback may decrease knee valgus angle during cutting tasks, but does not appear to acutely alter other measures that are thought to decrease ACL injury risk
New additions to the myxobiota of Costa Rica
The most recent checklist of myxomycetes from Costa Rica reported 208 species for the country. Informational gaps detected in that work and a sustained survey effort since the publication of the checklist increased the number of species to 218. In the study reported herein, we identified seven species not previously known from Costa Rica. In addition to increasing the number of species recorded to 225, this work also provided important information relating to potential distribution, ecological preferences and the role of isolation techniques for biodiversity surveys of myxomycetes. The fact that a region with only 0.05% of the terrestrial surface of the Earth accounts for approximately 25% of the global biodiversity of myxomycetes, even with the technical limitations of the isolation methods used up to date, shows one more time that this group of organisms is not only well established in terrestrial environments but widely distributed in the Neotropics.Universidad de Cost Rica/[731-B4-072]/UCR/Costa RicaUniversidad de Cost Rica/[731-B5-044]/UCR/Costa RicaUniversidad de Cost Rica/[731-B0-896]/UCR/Costa RicaUCR::VicerrectorĂa de InvestigaciĂłn::Unidades de InvestigaciĂłn::IngenierĂa::Instituto Investigaciones en IngenierĂa (INII)UCR::VicerrectorĂa de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de BiologĂ
Delineation of the TRAK binding regions of the kinesin-1 motor proteins
Understanding specific cargo distribution in differentiated cells is a major challenge. Trafficking kinesin proteins (TRAKs) are kinesin adaptors. They bind the cargo binding domain of kinesin-1 motor proteins forming a link between the motor and their cargoes. To refine the TRAK1/2 binding sites within the kinesin-1 cargo domain, rationally designed C-terminal truncations of KIF5A and KIF5C were generated and their co-association with TRAK1/2 determined by quantitative co-immunoprecipitations following co-expression in mammalian cells. Three contributory regions forming the TRAK2 binding site within KIF5A and KIF5C cargo binding domains were delineated. Differences were found between TRAK1/2 with respect to association with KIF5A
- …