Global Shopping Center
UK | Germany
Home - Books - Science - Experiments, Instruments & Measurement - Weights & Measures Help

61-80 of 102     Back   1   2   3   4   5   6   Next 20

click price to see details     click image to enlarge     click link to go to the store

$51.00 list($55.00)
61. LabVIEW Power Programming
$199.00 $189.08
62. Occultations For Probing Atmosphere
$149.00 $110.85
63. Aberration-Free Refractive Surgery:
$95.00 $77.74
64. The Mathematics of Measurement:
$41.00
65. Measures on Infinite Dimensional
$93.00
66. Open Systems and Measurements
$188.75 list($250.00)
67. Principles and Methods of Temperature
$14.95 list($38.95)
68. Metric Units and Conversion Charts
$16.47 $16.38 list($24.95)
69. Measure for Measure: The Story
$16.99 $7.83
70. Introduction To Dimensional Weight
$125.00 $90.00
71. Spectral Line Shapes: Proceedings
$120.00
72. Equipping Science for the 21st
$70.00 $23.62
73. Integrated Chemistry and Physics
$358.82 list($235.00)
74. Temperature Measurement (Wiley
$45.95 list($54.00)
75. Learning With LabVIEW
$137.76 list($164.00)
76. Laser Doppler and Phase Doppler
$110.00 $97.75
77. The Practical Application of the
$219.00
78. Multiwavelength Approach to Unidentified
$249.00 $186.75
79. Modelling and Experimental Measurements
$120.00 $119.89
80. The Physics of Beams Andrew Sessler

61. LabVIEW Power Programming
by Gary W. Johnson
list price: $55.00
(price subject to change: see help)
Asin: 0079136664
Catlog: Book (1998-06)
Publisher: McGraw-Hill Professional Publishing
Sales Rank: 672929
Average Customer Review: 3 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Book Description

Timely, could be the first advanced book to market. All other LabVIEW books are low-level introductions. This is for the professional programmer. Well-known author Gary Johnson teaches LabVIEW to everybody! Blessed by National Instruments, the developers of LabVIEW. Step-by-step information to fully network LabVIEW. CD of virtual instruments and tools. ... Read more

Reviews (3)

4-0 out of 5 stars Takes LabVIEW Programming beyond DAQ.
In my opinion, the most useful sections of this book are the chapters on software engineering, and preparing a comprehensive requirements document. Having worked on several VIs originally developed by other LabVIEW programmers, I can definitely say that the development process is something we all need to pay more attention to...

Another interesting area is the section devoted to encryption. I have successfully applied these concepts to several of my own projects.

While not a LabVIEW "learning" text, or a practical guide to DAQ problem-solving, this book is very useful for the LabVIEW programmer who has mastered the basics and is looking for other interesting directions to follow.

1-0 out of 5 stars Put me to sleep!
This book is so "wordy" that it will put you to sleep. There is very little useful information or examples on the CD. I think I wasted my money on this book and don't want you to do the same. If you really want it, I will sell you mine at 50% off. I don't want it.

4-0 out of 5 stars This book filled most of my knowledge gaps about LabVIEW
This is my second LabVIEW book outside of the documentation set that ships with the product. It is well worth the read. A good portion of the book talks about good structured programming techniques, which is important, but not what I expected.

The real benefit of the book is in the advanced techniques, examples and tips that I'd not found anywhere else in any detail.

It's doubtful that any one person would benefit from every portion of the book because the author covers a broad array of topics, but the items I found of interest were very complete and allowed me to sit back and say, "O.K., Now I really understand how that's done." ... Read more


62. Occultations For Probing Atmosphere And Climate
by Gottfried Kirchengast, Ulrich Foelsche, Andrea K. Steiner
list price: $199.00
our price: $199.00
(price subject to change: see help)
Asin: 3540223509
Catlog: Book (2004-10-16)
Publisher: Springer Verlag
US | Canada | United Kingdom | Germany | France | Japan

Book Description

This book presents carefully edited and peer-reviewed papers from the 1st International Workshop on Occultations for Probing Atmosphere and Climate (OPAC-1). It starts with a general introductory paper and proceeds to address the full range of topics, from methodology in general via specific occultation methods (GNSS-LEO, LEO-LEO, stellar and solar) to the use of occultation data. It is the first book to provide a ... Read more


63. Aberration-Free Refractive Surgery: New Frontiers in Vision (Advanced Texts in Physics)
by Josef F. Bille, Carol F. H. Harner, Frieder F. Loesel
list price: $149.00
our price: $149.00
(price subject to change: see help)
Asin: 3540204210
Catlog: Book (2004-01-01)
Publisher: Springer-Verlag
US | Canada | United Kingdom | Germany | France | Japan

Book Description

This comprehensive report on sight correction through laser surgery provides the practitioner with solid background information from top industry researchers. Carefully illustrated, it details the latest techniques and clinical results in wavefront technology for laser surgery, which is now defining a new standard of practice. This second edition has been significantly expanded to include in-depth descriptions of important new advances as well as glimpses of what the future holds. The book will be indispensable to all wishing to expand their knowledge of customized refractive surgery with an understanding of the underpinning technology. ... Read more


64. The Mathematics of Measurement: A Critical History
by John J. Roche
list price: $95.00
our price: $95.00
(price subject to change: see help)
Asin: 0387915818
Catlog: Book (1999-04-01)
Publisher: Springer-Verlag
Sales Rank: 924346
US | Canada | United Kingdom | Germany | France | Japan

Book Description

The Mathematics of Measurement is a historical survey of the introduction of mathematics to physics and of the branches of mathematics that were developed specifically for handling measurements, including dimensional analysis, error analysis, and the calculus of quantities. Using an interdisciplinary approach and the insights provided by historical studies, Roche clarifies well-known difficulties in the mathematics of measurement, some of which have plagued scientists for over a century. The book is primarily intended for physicists and scientists from related disciplines such as mathematicians or meteorologists, however, the level and breadth of the treatment should also make it interesting for advanced undergraduates in these fields, as well as for historians and philosophers of science. ... Read more


65. Measures on Infinite Dimensional Spaces (Series in pure mathematics)
by Yasuo Yamasaki
list price: $41.00
our price: $41.00
(price subject to change: see help)
Asin: 9971978520
Catlog: Book (1985-08-01)
Publisher: World Scientific Pub Co Inc
Sales Rank: 2322524
US | Canada | United Kingdom | Germany | France | Japan

66. Open Systems and Measurements in Relativistic Quantum Theory: Proceedings of the Workshop Held at the Instituto Intaiano Per Gli Studi Filosofici Napl ... 3-4, 1998 (Lecture Notes in Physics, Vol 526)
by Heinz-Peter Breuer, Francesco Petruccione, F. Petruccione
list price: $93.00
our price: $93.00
(price subject to change: see help)
Asin: 3540659781
Catlog: Book (1999-06-01)
Publisher: Springer-Verlag Telos
Sales Rank: 3076968
US | Canada | United Kingdom | Germany | France | Japan

Book Description

This book treats modern aspects of open systems, measurement, and decoherence in relativistic quantum theory. It starts with a comprehensive introduction to the problems related to measuring local and nonlocal observables and the constraints imposed by the causality principle. In the articles that follow, the emphasis lies on new theoretical models. Quantum dynamical semigroups and stochastic processes in Hilbert space are introduced, as are dynamical reduction models. Further topics include relativistic generalizations of the continuous spontaneous localization model and of the quantum state diffusion model and decoherence and the dynamical selection of preferred basis sets in the framework of continuous measurement theory and of the decoherent histories approach. Mathematical aspects of quantum measurement theory and dynamical entropies are also studied from the viewpoint of the operational approach to quantum mechanics. ... Read more


67. Principles and Methods of Temperature Measurement
by Thomas D.McGee
list price: $250.00
(price subject to change: see help)
Asin: 0471627674
Catlog: Book (1988-05-05)
Publisher: Wiley-Interscience
Sales Rank: 1708229
US | Canada | United Kingdom | Germany | France | Japan

Book Description

Explains the principles underlying all devices used to sense temperature, and how the sensor signals are processed to convert them to indications of temperature. Describes the fundamental concepts of temperature, the Thermodynamic Temperature Scale, and the International Practical Temperature Scale. Covers sensor choice, response characteristics, heat transfer conditions, installation errors, instrumentation compromises, and mechanisms of sensor deterioration. Many specific sensors are described, including expansion devices, liquid-in-glass thermometers, electrical resistance devices, thermistors, electronic sensors, thermocouples, disappearing filament optical pyrometers, infrared pyrometers, total radiation pyrometers, pyrometric cones, and other novel methods. Includes discussion of measurement of temperatures to a fraction of a degree Kelvin. ... Read more


68. Metric Units and Conversion Charts
by TheodoreWildi
list price: $38.95
(price subject to change: see help)
Asin: 0780310500
Catlog: Book (1995-01-01)
Publisher: Wiley-IEEE Press
Sales Rank: 1023062
Average Customer Review: 4 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Book Description

Metric Units and Conversion Charts A Metrication Handbook for Engineers, Technologists, and Scientists Second Edition Why waste your valuable time hunting for conversion factors, symbols, and units? With this handbook, you can convert from one measurement system to any other by means of 62 conversion charts covering almost every field of science. The charts are based on values published by the foremost authoritative sources such as the American National Standards Institute (ANSI), the International Organization for Standardization (ISO), and the Institute of Electrical and Electronics Engineers, Inc. (IEEE). The charts are universal, and so conversions can be made quickly and confidently. This much-expanded second edition has the following features:
* The charts make a clear distinction between SI and other metric units by identifying SI units by red boxes.
* Official symbols of all SI units are given, along with the name of the unit.
* The recommended symbols for quantities are shown at the top of each chart.
* A new chapter on mass, force and gravity explains how the units of force were established.
* For introductory courses, chapters are included explaining quantity equations and numerical equations, together with worked-out examples.
* For classroom work, over 100 review questions, together with answers.
... Read more

Reviews (1)

4-0 out of 5 stars Pretty Handy
Handy and interesting book for Engineers of all disciplines. Although one can find resources on the web for free that do the same thing, the book is sometimes better because it shows the step by step conversion process in a way that allows a person to be more confident than a "black box" number. ... Read more


69. Measure for Measure: The Story of Imperial, Metric, and Other Units
by Alex Hebra, Alexius J. Hebra
list price: $24.95
our price: $16.47
(price subject to change: see help)
Asin: 0801870720
Catlog: Book (2003-03-15)
Publisher: Johns Hopkins University Press
Sales Rank: 299742
Average Customer Review: 3.83 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Book Description

From the cubit used by Noah to build the ark to the angstrom in spectroscopy, units of measure have been integral to science and engineering. Throughout history, countless systems of measurement have been devised and then discarded as more precise and more logical systems have come along. While most of the world has adopted the metric system, the United States--with the curious exception of soda bottles--adheres to the imperial system, even though the country has officially been a metric nation since 1893, when Thomas Corwin Mendenhall declared metric prototypes the country's "fundamental standards of length and mass." The convenience of the base-ten metric system is undeniable, and so are the costs associated with not converting to metric. Yet, Americans still cling to inches, quarts, and ounces.Clearly, there is more to measurement than logic.

In Measure for Measure, Alex Hebra offers a delightfully engaging and instructive history of measurement systems from ancient times to the present, exploring how and why such units as the stadium, the span, and the parsec first came about. Tracing civilization's various efforts to calculate distance, volume, mass, energy, and time, he explains how units of measurement are applied in such fields as mechanical engineering, physics, optics, and astronomy. In particular, Hebra focuses on the development of the metric system, arguing that even the United States will eventually join the worldwide metric community. Deeply informed and imaginatively told, Measure for Measure chronicles humanity's imperfect search for the perfect system with which to quantify reality. ... Read more

Reviews (6)

3-0 out of 5 stars Interesting material, but dreadful organization
This book covers a lot of information which could be done quite interestingly. However, its organization leaves so much to be desired that I was very disappointed in the book. It covers things like dimensional analysis and the effect of choice of units on physical formulas, as well as the history of units (as promised in the title), but it jumps from topic to topic in a chaotic manner, with topics that are closely related scattered among different chapters and things that ought to be separated lumped together in one chapter.

Another reviewer talked of the errors in some of the equations in this book. They are there, but I don't think that this is the biggest problem with this book. Rather, it is the totally incomprehensible lack of any sensible organization.

3-0 out of 5 stars Very Promising But a Little Disappointing
I just love books like this. They guide the reader through various physical concepts using simple calculations, often to arrive at interesting conclusions. The author of this book has attempted to do this in an accessible way while mixing in historical snippets to add to ones reading pleasure. Unfortunately, I must agree with the prior reviewer who commented on the fact that the book was very poorly edited. There are, indeed, too many errors and typos, especially in the equations, and many explanations lack the clarity and completeness that one would expect in such a book - things that may discourage neophytes and induce feelings of impatience and mistrust in the minds of the initiated. But because of the interesting topics discussed, a thorough, proper and careful revision of this book, including careful re-thinking and re-writing of some of the discussions would easily make it five-star material. Such a revised version would be an asset to popular science literature.

5-0 out of 5 stars Different systems are juxtaposed and examined
Measure For Measure is an informed and scholarly history of imperial, metric and other units of measurements blends science, engineering, and human discovery in a historical survey which examines standards of length and mass. Different systems are juxtaposed and examined during the course of Hebra's coverage, providing an excellent, engaging survey of past, present and possible future measurement systems and how they came to be.

5-0 out of 5 stars Great little science book
I was not the best student in high school or college, but now that I'm a "mature grownup" I enjoy reading science journals and books - as long as they're not too dry or massive. Who has time to plow through a 600 page tome?

I enjoyed reading Measure for Measure. Mr. Hebra uses lively text, formulas and plenty of clear drawings to help explain the subject matter. In every chapter I found fascinating details. Like how close we came to adopting a metric clock (10 hours per day, 100 minutes per hour) or that the great Thomas Edison electrocuted stray dogs to prove how dangerous AC electricity was, compared to DC. Yikes!

As with all disputes, the opposing sides of the metric vs. "standard" debate can sometimes be very polarizing and shrill. Mr. Hebra does not try to sway us one way or another but instead explains the logic and history behind our systems of measurement. He sometimes strays off the subject, but that's part of this book's charm. Hebra's anecdotes are amusing and help put a human face on the evolution of science and measuring systems.

If you want to learn a little more about and how mass, size, heat and time are all related and measured I strongly recommend picking up a copy of Measure for Measure.

5-0 out of 5 stars The whole nine yards (8.23 meters)
The great science myth is that all scientists use metric units. In this marvelous little book, which is thoroughly enjoyable to read, Hebra shows that they don't. Astronomers have parsecs, particle physicists use barns, and engineers and mathematicians often don't use units at all. To prove his point, Hebra shows us how to instruct space aliens to build a hydroelectric dam, without knowing what fluids they may use, how big their planet may be, how strong its gravitational force may be, etc.

Along the way, there are some fascinating anecdotes about hogsheads and jereboams, the thirteen-month year proposed by the League of Nations, and the size of Noah's ark.

I now have a far greater appreciation of the scientists and engineers who struggled so hard, and for so long, to come up with a standard system of units. I wish I could have read this book when I was taking physics in college. It's entertaining and breathes life into the science of measurement. ... Read more


70. Introduction To Dimensional Weight In Quality Dimensions
by david kieffer
list price: $16.99
our price: $16.99
(price subject to change: see help)
Asin: 1413445004
Catlog: Book (2004-04-16)
Publisher: Xlibris Corporation
US | Canada | United Kingdom | Germany | France | Japan

71. Spectral Line Shapes: Proceedings of the 13th International Conference on Spectral Line Shapes
list price: $125.00
our price: $125.00
(price subject to change: see help)
Asin: 1563966565
Catlog: Book (1997-02-01)
Publisher: AIP Press
US | Canada | United Kingdom | Germany | France | Japan

72. Equipping Science for the 21st Century: Proceedings of the International Workshop on Equipping Science for the 21st Century, Amsterdam, April 7-9, 1992
by International Workshop on Equipping Science for the 21st Century, John Irvine, Ben Martin, Roel Gathier
list price: $120.00
our price: $120.00
(price subject to change: see help)
Asin: 185278606X
Catlog: Book (1997-11-01)
Publisher: Edward Elgar Pub
Sales Rank: 2069398
US | Canada | United Kingdom | Germany | France | Japan

73. Integrated Chemistry and Physics
by RichardZajac, Richard P. Byrnes, Maria H. Ostasz
list price: $70.00
our price: $70.00
(price subject to change: see help)
Asin: 0471360198
Catlog: Book (2001-01-15)
Publisher: Wiley
Sales Rank: 2419893
US | Canada | United Kingdom | Germany | France | Japan

Book Description

This laboratory manual is designed to be used with the text, Physical Science: What the Technology Professional Needs to Know. Developed for the aspiring technology professional with little or no background in the study of physics or chemistry, it provides the experience necessary for students to develop skills in experimentation and data interpretation.
Like all of the books in the critically acclaimed Preserving the Legacy series, this manual is easy to understand and use, with clear instructions and a discovery approach. The book contains 26 experiments that have been carefully selected to illustrate major physics and chemistry concepts. They require simple, inexpensive equipment and are designed to be completed within three hours.
Each experiment starts with a review of the background concepts, information, and formulas necessary to carry out the experiment. Three or four investigations are then presented, each with its own objectives, procedures, and interpretation. Next, students are asked to demonstrate their understanding by bringing together selected data and conclusions in the preparation of a "Report Sheet." In a final section, students are given the opportunity to demonstrate their understanding of the concepts by applying them to a new situation.
Topics addressed in the experiments include:
* Measurements
* Matter and energy
* Acids and bases
* Motion
* Electricity
* Optics
* Nuclear processes
* Chemical reactions
... Read more


74. Temperature Measurement (Wiley Series in Measurement Science and Technology)
by L. Michalski, K. Eckersdorf, J. McGhee
list price: $235.00
(price subject to change: see help)
Asin: 0471922293
Catlog: Book (1991-10)
Publisher: John Wiley & Sons
Sales Rank: 3294767
US | Canada | United Kingdom | Germany | France | Japan

Book Description

The accurate measurement of temperature is a vital parameter in many fields of engineering and scientific practice. Responding to emerging trends, this classic reference has been fully revised to include coverage of the latest instrumentation and measurement methods.
Featuring:

  • Brand new chapters on computerised temperature measuring systems, signal conditioning and temperature measurement in medicine
  • Sections on noise thermometers, the development of photoelectric and multi-wavelength pyrometers and the latest IEC (International Electrotechnical Commission) standards
  • Coverage of fibre optic thermometers, imaging of temperature fields and measurement in hazardous areas
  • Examination of virtual instruments in temperature measurement, and new methods for themometer calibration
  • Many numerical examples, tables and diagrams
Practising instrument engineers, graduate students and researchers in the fields of mechanical, electrical and electronic engineering and in other industrial areas will welcome this balanced approach to both the theory and practice of temperature measurement. ... Read more

75. Learning With LabVIEW
by Robert H. Bishop
list price: $54.00
(price subject to change: see help)
Asin: 0201361663
Catlog: Book (1999-02-15)
Publisher: Addison Wesley Longman
Sales Rank: 743089
Average Customer Review: 4 out of 5 stars
US | Canada | United Kingdom | Germany | France | Japan

Book Description

Learning with LabVIEW is a tutorial that teaches graphical programming concepts through real world applications. Bishop's accessible, motivational approach helps students successfully master LabVIEW. ... Read more

Reviews (4)

4-0 out of 5 stars Learning with LabVIEW
I find the book very informative and easy to read. However, the book has a number of exercises that refer to a CD that ships with the book. I received no CD, so following some of the examples and performing the exercises can be quite difficult. If a CD is required, I suggest that it be included with the book.

4-0 out of 5 stars Excelente para aprendices de LabVIEW
Excelente para empezar con LabVIEW. Introduce al lector en forma gradual y con muchos ejemplos ya hechos y probados. Trata temas muy importantes a nivel superficial como procesamiento de señales. Es de fácil y rápida lectura. Lo recomiendo para un primer curso de LabVIEW.

5-0 out of 5 stars Great beginner book
This book takes you step by step from the beginning. A must for the beginning programmer and a good reference for the advanced programmer. I read it straight through and never got bored or confused.AWESOME!

3-0 out of 5 stars easy to pick up the very one
virtual instruments good tool ... Read more


76. Laser Doppler and Phase Doppler Measurement Techniques
by H. E. Albrecht, M. Borys, N. Damaschke, C. Tropea
list price: $164.00
our price: $137.76
(price subject to change: see help)
Asin: 3540678387
Catlog: Book (2002-12-16)
Publisher: Springer-Verlag
Sales Rank: 392232
US | Canada | United Kingdom | Germany | France | Japan

Book Description

Providing the first comprehensive treatment, this book covers all aspects of the laser Doppler and phase Doppler measurement techniques, including light scattering from small particles, fundamental optics, system design, signal and data processing, tracer particle generation, and applications in single and two-phase flows. The book is intended as both a reference book for more experienced users as well as an instructional book for students. It provides ample material as a basis for a lecture course on the subject and represents one of the most comprehensive treatments of the phase Doppler technique to date. The book will serve as a valuable reference book in any fluid mechanics laboratory where the laser Doppler or phase Doppler techniques are used. This work reflects the authors' long practical experience in the development of the techniques and equipment, as the many examples confirm. ... Read more


77. The Practical Application of the Moire Fringe Method in the Measurement of Strain and Shape
by C. A. Walker
list price: $110.00
our price: $110.00
(price subject to change: see help)
Asin: 0750305223
Catlog: Book (2001-12-15)
Publisher: Institute of Physics Publishing
Sales Rank: 2084686
US | Canada | United Kingdom | Germany | France | Japan

78. Multiwavelength Approach to Unidentified Gamma-Ray Sources : A Second Workshop on the Nature of the High-Energy Unidentified Sources
list price: $219.00
our price: $219.00
(price subject to change: see help)
Asin: 1402032145
Catlog: Book (2005-06)
Publisher: Springer
US | Canada | United Kingdom | Germany | France | Japan

Book Description

Nearly one half of the point-like gamma-ray sources detected by EGRET instrument of the late Compton satellite are still defeating our attempts at identifying them. To establish the origin and nature of these enigmatic sources has become a major problem of current high-energy astrophysics. The second workshop on Multiwavelength Approach to Unidentified Gamma-ray Sources intends to shed new and fresh light on the problem of the nature of the unidentified gamma-ray sources.

The proceedings contain 46 contributed papers in this subject, which cover theoretical models on gamma-ray sources as well as the best multiwavelength strategies for the identification of the promising candidates. The topics of this conference also include energetic phenomena occurring both in galactic and extragalactic scenarios, phenomena that might lead to the appearance of what we have called high-energy unidentified sources.

The book will be of interest for all active researchers in the high-energy astrophysics and related research areas as well as for scientists and graduate students interested in understanding the recent progress in high-energy astrophysics.

... Read more

79. Modelling and Experimental Measurements in Acoustics III (Computational and Experimental Methods)
by International Conference on Modelling and Experimental Measurements in, R. Hernandez, C. A. Brebbia, D. Almorza, David Almorza Gomar, Ricardo Hernandez Molina, Wessex Institute of Technology
list price: $249.00
our price: $249.00
(price subject to change: see help)
Asin: 1853129755
Catlog: Book (2003-05-28)
Publisher: WIT Press (UK)
Sales Rank: 2513937
US | Canada | United Kingdom | Germany | France | Japan

Book Description

The need for accurate acoustic prediction in many environments, including vehicles, aircraft, buildings, site planning, sound barriers and industrial plants, together with an increasing concern for the natural environment, has led to considerable software development and experimentation in recent years.Detailing the latest advances in this area, this book features the proceedings of the Third International Conference on Modelling and Experimental Measurements in Acoustics.

Topics covered are:Ambient Noise Problems;Environmental Noise;Building Acoustics; Industrial Noise and Vibrations;Sound Absorption Barriers;Sound Reproduction and Visualisation; Aero- and Hydro-Acoustics;Underwater Acoustics;Detection Systems;Acoustic Modelling Studies; Wave Propagation;and Advanced Applications. ... Read more


80. The Physics of Beams Andrew Sessler Symposium: Proceedings of the Symposium Held in Los Angeles, Ca, December 1993 (Aip Conference Proceedings, 351)
by William A. Barletta
list price: $120.00
our price: $120.00
(price subject to change: see help)
Asin: 1563963760
Catlog: Book (1995-12-01)
Publisher: AIP Press
US | Canada | United Kingdom | Germany | France | Japan

61-80 of 102     Back   1   2   3   4   5   6   Next 20
Prices listed on this site are subject to change without notice.
Questions on ordering or shipping? click here for help.

Top