João N . S . Freitas (original) (raw)

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Papers by João N . S . Freitas

Research paper thumbnail of Workplace SafetyWorkplace Safety A Mercury Exposure Assessment

Testing a work practice for cleaning up broken fluorescent bulbs

Research paper thumbnail of The Quantum Brain

Research paper thumbnail of Radionuclide Imaging of Musculoskeletal Injuries in Athletes with Negative Radiographs

The Physician and Sportsmedicine, 1987

Research paper thumbnail of Percolation in a Multifractal

Eprint Arxiv Cond Mat 0212530, Dec 1, 2002

We build a multifractal object and use it as a support to study percolation. We identify some dif... more We build a multifractal object and use it as a support to study percolation. We identify some differences between percolation in a multifractal and in a regular lattice. We use many samples of finite size lattices and draw the histogram of percolating lattices against site occupation probability. Depending on a parameter characterizing the multifractal and the lattice size, the histogram can have two peaks. The percolation threshold for the multifractal is lower than for the square lattice. The percolation in the multifractal differs from the percolation in the regular lattice in two points. The first is related with the coordination number that changes along the multifractal. The second comes from the way the weight of each cell in the multifractal affects the percolation cluster. We compute the fractal dimension of the percolating cluster. Despite the differences, the percolation in a multifractal support is in the universality class of standard percolation.

Research paper thumbnail of Starport Digital Gamma Camera—Reply

Journal of Nuclear Medicine, Apr 1, 1990

Research paper thumbnail of Radioiodine Therapy of Non-Toxic Goiter

Endocrinologist, 1999

Advertisement. Close Window. Close Window. Thank you for choosing to subscribe to the eTOC for Th... more Advertisement. Close Window. Close Window. Thank you for choosing to subscribe to the eTOC for The Endocrinologist. Enter your Email address: Wolters Kluwer Health may email you for journal alerts and information, but is ...

Research paper thumbnail of The Clinical Utility of Prostate-Specific Antigen and Bone Scintigraphy in Prostate Cancer Follow-up

Journal of Nuclear Medicine, Jul 1, 1991

Research paper thumbnail of Nuclear Medicine Annual 1982 L. M. Freeman, H. S. Welssmann. New York, Raven Press, 1982, 420 pp. $49.00

Journal of Nuclear Medicine, Jul 1, 1983

Research paper thumbnail of Recent Advances in Nuclear Medicine (Volume 6) J.H. Lawrence, H.S. Winchell, Eds. New York, NY, Grune & Stratton, 1983, 210 pp, $49.50

Journal of Nuclear Medicine, Aug 1, 1984

Research paper thumbnail of Thyroid Cancer: A Comprehensive Guide to Clinical Management

Journal of Nuclear Medicine, Jun 1, 2001

Research paper thumbnail of Varying critical percolation exponents on a multifractal support

We study percolation as a critical phenomenon on a multifractal support. The scaling exponents of... more We study percolation as a critical phenomenon on a multifractal support. The scaling exponents of the the infinite cluster size ($\beta$ exponent) and the fractal dimension of the percolation cluster ($d_f$) are quantities that seem do not depend on local anisotropies. These two quantities have the same value as in the standard percolation in regular bidimensional lattices. On the other side, the scaling of the correlation length ($\nu$ exponent) unfolds new universality classes due to the local anisotropy of the critical percolation cluster. We use two critical exponents nu\nunu according to the percolation criterion for crossing the lattice in either direction or in both directions. Moreover nu\nunu is related to a parameter that characterizes the stretching of the blocks forming the tilling of the multifractal.

Research paper thumbnail of Procedure Guideline for Hepatobiliary Scintigraphy

Journal of Nuclear Medicine, Oct 1, 1997

Research paper thumbnail of Clarifying dubious findings on I-131 thyroid cancer whole body images

Society of Nuclear Medicine Annual Meeting Abstracts, May 1, 2007

Research paper thumbnail of Mechanisms of the reaction of unsaturated organic halides with small gas-phase vanadium clusters

The Journal of Physical Chemistry, 1990

... Chem. 1986, 90, 4480. (6) Elkind, JL; Weiss, FD; Alford, JM; Laaksonen, RT; Smalley, REJ Chem... more ... Chem. 1986, 90, 4480. (6) Elkind, JL; Weiss, FD; Alford, JM; Laaksonen, RT; Smalley, REJ Chem. Phys. ... (c) Gaydon, A. G. Dissociation Energies and Spectro of Diatomic Molecules, 3rd ed.; Chapman and Hall: London, 1968. (d) Ferguson, K. C.; Okafo, E. N.; Whittle, EJ Chem. ...

Research paper thumbnail of Laser ionic multiphoton dissociation of some acrylate clusters

The Journal of Physical Chemistry, 1991

Page 1. 1664 J. Phys. Chem. 1991, 95, 1664-1667 these investigators and the bond energies obtaine... more Page 1. 1664 J. Phys. Chem. 1991, 95, 1664-1667 these investigators and the bond energies obtained from the results of Boo and Armentrout6 as well as by ourselves (see Table I). Our third law calculation of the SiH3-H bond ...

Research paper thumbnail of Diagnosis of Acute Cholecystitis-Reply

JAMA: The Journal of the American Medical Association, 1981

Research paper thumbnail of Optimizing the detection of hepatic metastases

Journal of Nuclear Medicine, Mar 1, 1979

Research paper thumbnail of Adrenal Visualization on Dexamethasone-Suppression Scintigraphy

Research paper thumbnail of Procedure Guideline for Carbon-14-Urea Breath Test

Journal of Nuclear Medicine, Nov 1, 1998

Research paper thumbnail of Early Multiprojectional Hepatic Imaging in Tc-99m PIPIDA Cholescintigraphy—Reply

Journal of Nuclear Medicine, Mar 1, 1981

Research paper thumbnail of Workplace SafetyWorkplace Safety A Mercury Exposure Assessment

Testing a work practice for cleaning up broken fluorescent bulbs

Research paper thumbnail of The Quantum Brain

Research paper thumbnail of Radionuclide Imaging of Musculoskeletal Injuries in Athletes with Negative Radiographs

The Physician and Sportsmedicine, 1987

Research paper thumbnail of Percolation in a Multifractal

Eprint Arxiv Cond Mat 0212530, Dec 1, 2002

We build a multifractal object and use it as a support to study percolation. We identify some dif... more We build a multifractal object and use it as a support to study percolation. We identify some differences between percolation in a multifractal and in a regular lattice. We use many samples of finite size lattices and draw the histogram of percolating lattices against site occupation probability. Depending on a parameter characterizing the multifractal and the lattice size, the histogram can have two peaks. The percolation threshold for the multifractal is lower than for the square lattice. The percolation in the multifractal differs from the percolation in the regular lattice in two points. The first is related with the coordination number that changes along the multifractal. The second comes from the way the weight of each cell in the multifractal affects the percolation cluster. We compute the fractal dimension of the percolating cluster. Despite the differences, the percolation in a multifractal support is in the universality class of standard percolation.

Research paper thumbnail of Starport Digital Gamma Camera—Reply

Journal of Nuclear Medicine, Apr 1, 1990

Research paper thumbnail of Radioiodine Therapy of Non-Toxic Goiter

Endocrinologist, 1999

Advertisement. Close Window. Close Window. Thank you for choosing to subscribe to the eTOC for Th... more Advertisement. Close Window. Close Window. Thank you for choosing to subscribe to the eTOC for The Endocrinologist. Enter your Email address: Wolters Kluwer Health may email you for journal alerts and information, but is ...

Research paper thumbnail of The Clinical Utility of Prostate-Specific Antigen and Bone Scintigraphy in Prostate Cancer Follow-up

Journal of Nuclear Medicine, Jul 1, 1991

Research paper thumbnail of Nuclear Medicine Annual 1982 L. M. Freeman, H. S. Welssmann. New York, Raven Press, 1982, 420 pp. $49.00

Journal of Nuclear Medicine, Jul 1, 1983

Research paper thumbnail of Recent Advances in Nuclear Medicine (Volume 6) J.H. Lawrence, H.S. Winchell, Eds. New York, NY, Grune & Stratton, 1983, 210 pp, $49.50

Journal of Nuclear Medicine, Aug 1, 1984

Research paper thumbnail of Thyroid Cancer: A Comprehensive Guide to Clinical Management

Journal of Nuclear Medicine, Jun 1, 2001

Research paper thumbnail of Varying critical percolation exponents on a multifractal support

We study percolation as a critical phenomenon on a multifractal support. The scaling exponents of... more We study percolation as a critical phenomenon on a multifractal support. The scaling exponents of the the infinite cluster size ($\beta$ exponent) and the fractal dimension of the percolation cluster ($d_f$) are quantities that seem do not depend on local anisotropies. These two quantities have the same value as in the standard percolation in regular bidimensional lattices. On the other side, the scaling of the correlation length ($\nu$ exponent) unfolds new universality classes due to the local anisotropy of the critical percolation cluster. We use two critical exponents nu\nunu according to the percolation criterion for crossing the lattice in either direction or in both directions. Moreover nu\nunu is related to a parameter that characterizes the stretching of the blocks forming the tilling of the multifractal.

Research paper thumbnail of Procedure Guideline for Hepatobiliary Scintigraphy

Journal of Nuclear Medicine, Oct 1, 1997

Research paper thumbnail of Clarifying dubious findings on I-131 thyroid cancer whole body images

Society of Nuclear Medicine Annual Meeting Abstracts, May 1, 2007

Research paper thumbnail of Mechanisms of the reaction of unsaturated organic halides with small gas-phase vanadium clusters

The Journal of Physical Chemistry, 1990

... Chem. 1986, 90, 4480. (6) Elkind, JL; Weiss, FD; Alford, JM; Laaksonen, RT; Smalley, REJ Chem... more ... Chem. 1986, 90, 4480. (6) Elkind, JL; Weiss, FD; Alford, JM; Laaksonen, RT; Smalley, REJ Chem. Phys. ... (c) Gaydon, A. G. Dissociation Energies and Spectro of Diatomic Molecules, 3rd ed.; Chapman and Hall: London, 1968. (d) Ferguson, K. C.; Okafo, E. N.; Whittle, EJ Chem. ...

Research paper thumbnail of Laser ionic multiphoton dissociation of some acrylate clusters

The Journal of Physical Chemistry, 1991

Page 1. 1664 J. Phys. Chem. 1991, 95, 1664-1667 these investigators and the bond energies obtaine... more Page 1. 1664 J. Phys. Chem. 1991, 95, 1664-1667 these investigators and the bond energies obtained from the results of Boo and Armentrout6 as well as by ourselves (see Table I). Our third law calculation of the SiH3-H bond ...

Research paper thumbnail of Diagnosis of Acute Cholecystitis-Reply

JAMA: The Journal of the American Medical Association, 1981

Research paper thumbnail of Optimizing the detection of hepatic metastases

Journal of Nuclear Medicine, Mar 1, 1979

Research paper thumbnail of Adrenal Visualization on Dexamethasone-Suppression Scintigraphy

Research paper thumbnail of Procedure Guideline for Carbon-14-Urea Breath Test

Journal of Nuclear Medicine, Nov 1, 1998

Research paper thumbnail of Early Multiprojectional Hepatic Imaging in Tc-99m PIPIDA Cholescintigraphy—Reply

Journal of Nuclear Medicine, Mar 1, 1981

Research paper thumbnail of DESIGN MÁKINA BEHU BATAR NE’EBÉ ERGONÓMIKU BA AGRIKULTOR

João Natalino Soares Freitas, 2023

ABSTRACT The agricultural sector is the determining aspect that has the most important role in pr... more ABSTRACT
The agricultural sector is the determining aspect that has the most important role in providing agricultural products to everyone, because this sector is a factor that can ensure the survival of everyone so that they can carry out their daily activities as usual so that in the end they can achieve their goals. In Lonlolo Village, Molop Tribe, Bobonaru Subdistrict, most people are born with an agricultural life. From this agricultural life, the most popular agricultural product is corn after the first product, namely rice. Thus, to do agricultural work, most people work with traditional methods and in the end it affects the productivity of the community because of fatigue in their bodies.
To be able to provide a solution to this problem, researchers use an anthropometric approach so that they can design an ergonomic tool or machine based on the dimensions of the community's body. And the anthropometric data taken or selected by researchers from the dimensions of the community's body in Lonlolo village to be used in the design of the corn thresher are as follows, 1) Standing Elbow Height (SEH), 2) Shoulder Width (SW) and 3) Hand Horizontal Length (HHL).
Finally, for the results of the calculation of the percentile it is known that it will be used for the design or construction of a corn thresher machine, and the results are as follows, for the maximum height the machine will use the SEH dimension for the P5 percentile with a value of 91.200285 cm and rounded to 91.20 cm, for machine width using SW dimensions for the P95 percentile with a value of 45.472835 cm and rounded to 45.5 cm, finally for machine length using the HHL dimensions for the P50 percentile with a value of 64.5 cm.
Keywords: Agriculture, Anthropometry, Ergonomics, Design.