darwin s wake where am i

... the hubris of some scientists Successful as it is, and universally encompassing as its subject is, a scientific view of the world is hopelessly incomplete There are matters of value and meaning that ... Testing a scientific hypothesis involves at least four different activities First, the hypothesis must be examined for internal consistency A hypothesis that is self-contradictory or logically ill-formed ... requirement that scientific hypotheses be empirically falsifiable Scientific hypotheses cannot be consistent with all possible states of affairs in the empirical world A hypothesis is scientific...

Ngày tải lên: 01/11/2013, 07:20

... existing-inventory equipment of this type simplifies some of the logistics problems associated with vehicle maintenance In addition, reliability of the drive components is high due to the inherited ... in-depth discussion of output options (single-ended TTL or differential drivers) and various design issues (i. e., resolution, bandwidth, phasing, filtering) for consideration when interfacing phasequadrature ... horizontal axis As mentioned earlier, when the gyro spin axis is oriented in a north-south direction, it is insensitive to the earth 's rotation, and no tilting occurs From this it follows that if...

Ngày tải lên: 13/02/2014, 09:20

... www.tigr.org) Research on crop plant origins and evolution is relevant to researchers in many disciplines Geneticists, agronomists, botanists, systematists, population biologists, archaeologists, ... provide powerful tools to crop scientists at a time when it is possible to study entire crop genomes As new questions arise, many crop researchers are revisiting classic evolutionary inquiries into ... (Tropical South Asiatic, East Asiatic, Southwestern Asiatic, Western Asiatic, Mediterranean, Abyssinian [Ethiopian], Central American, and Andean–South American), based on morphological similarities...

Ngày tải lên: 03/04/2014, 12:10

... distinguishes between uncompromising reductionism (a bad thing) and compromising reductionism (which he ringingly endorses) Here is my own version We must distinguish reductionism, which is in ... hypothesis seriously This sum as it appeared in the first edition is wrong, and when this was pointed out, Darwin revised his calculations for later editions, but the general principle is still ... as satisfying answers to this ancient and inescapable question Here science and philosophy get completely intertwined Scientists sometimes deceive themselves into thinking that philosophical ideas...

Ngày tải lên: 05/06/2014, 11:25

... conditions of ORGANIC NATURE Such is the hypothesis as I understand it Now let us see how it will stand the various tests which I laid down just now In the first place, these supposed causes of ... again divisible into provinces; that each province may be divided into classes, and the classes into the successively smaller groups, orders, families, genera, and species Now, in each of these ... them as members of the same Family, or of the same Genus, but as of distinct Species That it is possible to arrange all the varied forms of animals into groups, having this sort of singular subordination...

Ngày tải lên: 28/06/2014, 19:20

... horizontal axis As mentioned earlier, when the gyro spin axis is oriented in a north-south direction, it is insensitive to the earth 's rotation, and no tilting occurs From this it follows that if ... autonomous robotic applications, where the ability to surmount significant floor discontinuities is more desirable than accurate odometry information An example is seen in the track drives popular with ... Program [Aviles et al., 1990] From a military perspective, the use of existing-inventory equipment of this type simplifies some of the logistics problems associated with vehicle maintenance In...

Ngày tải lên: 10/08/2014, 02:21

... geomagnetic sensor: 1) high sensitivity, 2) directionality, and, in the case of AMR sensors, 3) the characteristic “flipping” action associated with the direction of internal magnetization AMR sensors ... however, is that it requires significantly less fiber (from 10 to 100 times less) in the sensing coil than the IFOG configuration, while achieving the same shot-noise-limited performance [Sanders, ... magnetoresistive sensors The sensors' output signals are amplified and AC-coupled to a 60 Part I Sensors for Mobile Robot Positioning Vo Magnetizing current I Time Magnetization Offset Hy M Time Sensor...

Ngày tải lên: 10/08/2014, 02:21

... receivers were slightly less accurate and exhibited similar static position error performance The static navigation mode results did not differentiate the sensitivity of the various receivers significantly ... detection is sustained, while triangulation schemes suffer diminishing accuracy as distance to the target increases Potential error sources for TOF systems include the following:  Variations in ... well as the requirements of the current application, a list of critical issues is outlined in Section 3.3.4.2 One critical integration issue not mentioned in Section 3.3.4.2 is price Almost any...

Ngày tải lên: 10/08/2014, 02:21

... better facilitate vehicle classification in automated toll booth applications An abbreviated system block diagram is depicted in Figure 4.14 Figure 4.13: The AutoSense II is SEO 's active-infrared ... illuminate a scene further away than light traveling only millisecond The entire sensing range is divided into discrete distance increments, each representing a distinct range plane This is accomplished ... each new transmission This creates the same detection intervals as before, but with an increase in the time required for data acquisition LORDS is designed to operate over distances between one...

Ngày tải lên: 10/08/2014, 02:21

... expression for E max,syst This 136 Part II Systems and Methods for Mobile Robot Positioning is because all systematic orientation errors are implied by the final position errors In other words, since ... error sources in software This mistake is so serious because it will yield apparently “excellent” results, as shown in the example in Figure 5.3 In this example, the experimenter began “improving” ... subsystem in conjunction with vehicle speed and steering inputs, and activates audible and visual LED alerts if a dangerous condition is thought to exist (Selected specifications are listed in...

Ngày tải lên: 10/08/2014, 02:21

... gyro information The ellipses show the reliability of position estimates (the probability that the robot stays within the ellipses at each estimated position is 90 percent in this simulation) Figure ... reliably and provide very accurate positioning information with minimal processing As a result, this approach allows high sampling rates and yields high reliability, but it does also incur high ... Preserving an unobstructed view is sometimes difficult if not impossible in certain applications such as congested warehouse environments In the case of passive retroreflective targets, problems...

Ngày tải lên: 10/08/2014, 02:21

... IEEE.) Discussion With the grid-map system used in Blanche, generality has been sacrificed for robustness and speed The algorithm is intrinsically robust against incompleteness of the image Incompleteness ... representations be used in environment modeling with sonars: parametric primitives and an occupancy grid Parametric primitives describe the limits of free space in terms of segments or surfaces ... as table legs are practically impossible to distinguish from noise Schiele and Crowley discuss four different matches:  Matching segment to segment as realized by comparing segments in (1) similarity...

Ngày tải lên: 10/08/2014, 02:21

... processing and sensing capability, C need extensive processing, depending on the algorithms and resolution used, C require initial position estimates from odometry in order to limit the initial search ... determined as illustrated in Fig 9.2a However, it is not always possible to uniquely identify simple features such as points and lines in an image Vertical lines are not usually identifiable unless ... Part II Systems and Methods for Mobile Robot Positioning 8.4 Summary Map-based positioning is still in the research stage Currently, this technique is limited to laboratory settings and good results...

Ngày tải lên: 10/08/2014, 02:21

... University Vision camera with fish-eye lens A light array (3x3) 40 mm Omnidirectional vision navigation with beacon recognition Vision algorithm for mobile vehicle navigation TRC Labmate Vision camera ... Vision camera Rectangular ceiling lights, concentric circle

Ngày tải lên: 10/08/2014, 02:21

... “Hierarchical Evidence Accumulation in the PSEIKI System and Experiments in Model-driven Mobile Robot Navigation.” in Uncertainty in Artificial Intelligence, Vol 5, Elsevier Science Publishers ... 617-646-4362 321 ISR - IS Robotics, Inc., RR-1/BS-1 System for Communications and Positioning Preliminary Data Sheet.” IS Robotics, Twin City Office Center, Suite 6, 22 McGrath Highway, Somerville, MA ... Comparison of Position Estimation Techniques Using Occupancy Grids.” Robotics and Autonomous Systems, Vol 12, pp 163-171 253 Schultz, W., 1993, “Traffic and Vehicle Control Using Microwave Sensors.”...

Ngày tải lên: 10/08/2014, 02:21

... minutes The University of Michigan: Internal Odometry Error Correction with the CLAPPER Duration: 4:24 minutes 240x180 240x180 360x240 Spatial Positioning Systems: Odyssey laser beacon positioning ... b LightRanger rotating/nodding lidar Vision-based landmark detection Duration: 4:28 minutes 360x240 The University of Michigan: Multi-Degree-of-Freedom vehicle with compliant linkage Duration: ... positioning system Duration: 2:23 minutes 240x180 360x240 Windsor Industries and Denning Branch International Robotics: RoboScrub Learn about video Duration: 2:00 minutes 240x180 360x240 360x240 MTI:...

Ngày tải lên: 10/08/2014, 02:21

... Borenstein, J., Wehe, D., Feng, C., Koren, Y., 1995, "Mobile Robot Navigation in Narrow Aisles with Ultrasonic Sensors." Presented at the ANS 6th Topical Meeting on Robotics and Remote Systems," ... Conference on Intelligen t Robots and Systems (IROS '95), Pittsburgh, Pennsylvania, August 5-9, 1995, pp 569574 Paper 60 Borenstein, J and Feng L., 1995c, "UMBmark: A Benchmark Test for Measuring Deadreckoning ... Monterey, California, February 5-10, 1995 Paper 59 Borenstein, J and Feng L., 1995b, "Correction of Systematic Dead-reckoning Errors in Mobile Robots." Proceedings of the 1995 International Conference...

Ngày tải lên: 10/08/2014, 02:21

... protein evolution as aspects of gene expression do, as discussed by Urrutia This is in stark contrast to the traditional amino-acid-centered view of protein evolution Using analogies with mountaineering, ... 'functional promiscuity' and conformational variability One of us (MPHS) described the phage-shock stress response in Escherichia coli as an example in which the loss and gain of proteins across ... phosphorylation This is a field of enormous biomedical importance, as kinase and phosphatase activities crucially regulate signaling and metabolic processes The structural work of Louise Johnson (University...

Ngày tải lên: 14/08/2014, 21:20