检索结果-南通市图书馆

Near-neutral pH corrosion of mill-scaled X-65 pipeline steel with paint primer

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2020年第14期47卷 166-178页

作者： Shidong Wang lyndon Lamborn Karina Chevil Erwin Gamboa Weixing Chen Department of Chemical and Materials Engineering University of AlbertaEdmontonT6G 2G6Canada Enbridge Pipelines Inc. EdmontonT5J 3N7Canada TC Energy Corporation CalgaryT2P 5H1Canada

The corrosion behaviour of mill-scaled X65 pipeline steel with and without a primer layer was studied in a simulated near-neutral pH soil *** revealed a three-stage corrosion process of the mill-scaled pipeline steel *** first stage included an initial preferential dissolution of goethite(γ-FeOOH)and lepidocrocite(?-FeOOH)in mill *** second stage was marked by enhanced localized corrosion and pit-formation because of either galvanic corrosion or acidic dissolution in areas enclosed by mill *** final stage was general corrosion after the mill scale flaked off the steel *** the primer layer was applied,localized corrosion was significantly enhanced on the steel surface and persisted for an extended period as compared to the mill-scaled *** precipitation of siderite(FeCO3)was observed at flawed locations of mill scale,although the bulk chemistry is not favorable for its formation on the steel surface free of mill *** local precipitation of siderite formed a capped mill scale enclosure where localized corrosion can be further enhanced.

关键词： Pipeline steel Primer paint Mill scale Localized corrosion Siderite precipitation

Optimizing care for ST-elevation myocardial infarction patients： application of systems engineering

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2016年第11期13卷 883-887页

作者： Joel A. Strom Charles Sand lyndon C. Box Florida Polytechnic University IST Building 4700 Research Way Lakeland FL USA Department of Emergency Medicine St. Joseph's Hospital 3001 W. Dr. Martin Luther King Jr. Blvd. Tampa FL USA Air Methods Bayflite 701 6th St S St. Petersburg FL USA West Valley Medical Group 1906 Fairview Ave #230 Caldwell ID USA

Timely reperfusion for patients with an ST-elevation myocardial infarction （STEMI） reduces myocardial cell loss resulting in preserved LV performance, a reduced incidence of congestive heart failure, and significantly lower early and late mortality, while conversely, any delay in reperfusion has a deleterious effect on morbidity and mortality.

关键词： Primary percutaneous angioplasty ST-elevation myocardial infarction care systems

Achieving timely percutaneous reperfusion for rural ST-elevation myocardial infarction patients by direct transport to an urban PCI-hospital

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2016年第10期13卷 840-845页

作者： Charles-Lwanga K Bennin Saif Ibrahim Farah Al-Saffar lyndon C Box Joel A Strom Valley Cardiology Fayetteville North Carolina USA Division of Cardiology Department of Medicine University of Florida College of Medieine Jacksonville Jaeksonville Florida USA Division of Cardiovascular Diseases Mayo Clinic Seottsdale Arizona USA West Valley Medical Group Caldwell Idaho USA Florida Polytechnic University Lakeland Florida USA

Backgrounds ST-elevation myocardial infarction （STEMI） guidelines recommend reperfusion by primary percutaneous coronary in- tervention （PCI） ≤ 90 min from time of first medical contact （FMC）. This strategy is challenging in rural areas lacking a nearby PCI-capable hospital. Recommended reperfusion times can be achieved for STEMI patients presenting in rural areas without a nearby PCI-capable hospital by ground transportation to a central PCI-capable hospital by use of protocol-driven emergency medical service （EMS） STEMI field triage protocol. Methods Sixty STEMI patients directly transported by EMS from three rural counties （Nassau, Camden and Charlton Counties） within a 50-mile radius of University of Florida Health-Jacksonville （UFHJ） from 01/01/2009 to 12/31/2013 were identified from its PCI registry. The STEMI field triage protocol incorporated three elements：（1） a cooperative agreement between each of the rural emergency medical service （EMS） agency and UFHJ; （2） performance of a pre-hospital ECG to facilitate STEMI identification and laboratory activation; and （3） direct transfer by ground transportation to the UFHJ cardiac catheterization laboratory. FMC-to-device （FMC2D）, door-to-device （D2D）, and transit times, the day of week, time of day, and EMS shift times were recorded, and odds ratio （OR） of achieving FMC2D times was calculated. Results FMC2D times were shorter for in-state STEMIs （81 ± 17 vs. 87± 19 min）, but D2D times were similar （37 ± 18 vs. 39 ± 21 min）. FMC2D 〈 90 min were achieved in 82.7% in-state STEMIs compared to 52.2% for out-of-state STEMIs （OR = 4.4, 95% CI： 1.24-15.57; P = 0.018）. FMC2D times were homogenous after adjusting for weekday vs. weekend, EMS shift times. Nine patients did not meet FMC2D ≤ 90 min. Six were within 10 min of target; all patient achieved FMC2D 〈 120 min. Conclusions Guideline-compliant FMC2D ≤90 min is achievable for rural STEMI patients within a 50 mile radius of a PCI-capable hospital by use of protocol-driv

关键词： Myocardial infarction Percutaneous coronary intervention Systems of care

A Relationship between Dispersion Measure and Redshift Derived in Terms of New Tired Light

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of High Energy Physics, Gravitation and Cosmology 2016年第4期2卷 512-530页

作者： lyndon Ashmore Independent Researcher Dubai UAE

New data from FRB’s have provided an exciting new window on the cosmos. For the first time we have both Dispersion Measure (DM) from distant sources and their red-shift. This gives us the opportunity to determine the average electron number density in intergalactic space and thus test New Tired Light predictions. Here, in an alternative cosmology, the universe is static and redshifts are produced by an interaction between photons and the electrons in the intergalactic medium. In a paper published in summer 2006 New Tired Light (NTL) predicted an average electron number density of n = 0.5 m-3. In 2016 a paper was published reporting that for the first time the DM of a FRB and the redshift of the host galaxy had been found. Using standard physics this confirmed the electron number density as n = 0.5 m-3. The prediction NTL made ten years earlier was proved to be correct. Using this measured electron number density enabled a definitive value of the Hubble constant to be made by New Tired Light and the value is 63 km/s per Mpc which compares well with currently accepted values. Importantly, since in NTL the redshift and dispersion are both due to the electrons in IG space, a relationship between DM’s and redshift can be predicted. NTL predicts that DM and LN(1 + z) will be directly proportional and related by the formula DM = mec/2hre(3.086 × 1022) where me, re are the rest mass and classical radius of the electron, c is the speed of light in a vacuum and h is the plank constant. The numerical term is to change units from pccm-3 to m-2. This reduces to DM = 2380LN(1 + z). Using data from five FRB’s this is tested and a linear relation is seen of the form DM = 1830LN(1 + z). The gradient of the plot from the observed data is within 23% of that predicted by NTL. Recently the Tolman Surface Brightness test has been applied to the HUDF and the results support a static universe whilst the possibility of two differing typ

关键词： Redshift Tired Light Hubble Constant Expanding Universe CMB Supernovae Time Dilation

Data from Twenty-Three FRB’s Confirm the Universe Is Static and Not Expanding

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of High Energy Physics, Gravitation and Cosmology 2024年第3期10卷 1152-1177页

作者： lyndon Errol Ashmore Independent Researcher Southend-on-Sea England

Fast Radio Bursts from far away galaxies have travelled through the IGM and provide a tool to study its composition. Presently there are 23 FRB’s whose host galaxies have been identified and the redshift found. This gives us the opportunity to test Dispersion Measure versus redshift predictions made by two models. The Macquart relation for an expanding Universe and the New Tired Light relationship in a static universe. In New Tired Light, redshifts are produced when a photon is absorbed and re-emitted by the electrons in the IGM which recoil on both occasions. Some of the energy of the photon has been transferred to the kinetic energy of the recoiling electron. The photon has less energy, a lower frequency and a longer wavelength. It has been redshifted. Since dispersion is due to an interaction between radio signals and these same electrons one would expect a direct relationship between DM and redshift in the New Tired light model. The relation is DM=(mec/2hre)ln(1+z)and contains no adjustable parameters—just a combination of universal constants related to the electron and photon. Notice that the relation is independent of the electron number density ne since a change in ne affects both the DM and redshift equally. A graph of DM versus ln(1 + z) will be a straight line of gradient (mec/2hre)and, using SI units, substituting for the constants gives 7.318 × 1025 m−2. Using the data from the 23 well localized FRB’s, with the weighting of the DM’s for expansion removed (so that the data corresponds to a static universe), a graph of DM versus ln(1 + z) has a gradient of 6.7 × 1025 m−2—9% below the predicted (mec/2hre). The Macquart relation involves highly processed data and adjustable parameters to allow for “dark energy” and “dark matter” (neither of which has yet been found) and can be reduced to DM = 850z (in units of pc∙cm−3). Using the data from this set of localized FRB’s gives a trendline with gradient 1.10 × 103 pc∙cm−3—almost 30% higher than that predicted in

关键词： Redshift Dispersion Measure Fast Radio Bursts FRB’s Tired Light Static Universe IGM

Galaxies “Boiling off” Electrons Due to the Photo-Electric Effect Leading to a New Model of the IGM and a Possible Mechanism for “Dark Matter”

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of High Energy Physics, Gravitation and Cosmology 2019年第1期5卷 181-192页

作者： lyndon Ashmore Independent Researcher Southend UK

The Intergalactic Medium (IGM) is commonly thought to be occupied by approximately one atom of Hydrogen per cubic metre of space either as neutral Hydrogen or partially/fully ionised. This cannot be true as galaxies will “boil off” electrons from their outer surfaces by the photo-electric effect and so the IGM must be filled with electrons. UV and X-ray photons, as they leave the galaxy, can remove an electron from a Hydrogen atom at the surface of the galaxy, give it sufficient energy to escape the gravitational pull of the galaxy and go on to fill the IGM. A typical galaxy emits approximately 5×1047 X-ray photons each second. All of which pass through the outer surface of the galaxy and have sufficient energy to eject an electron and send it off to the IGM. Adding to these photons in the UV and gamma, we can see that galaxies are ejecting large amounts of electrons each second that go on to fill the IGM. Data from FRB 121102 give the value for the electron number density in the IGM as ne ≈ 0.5 m-3. Under certain conditions, an electron gas will crystallise into a Wigner-Seitz crystal. Here the electrical potential energy of repulsion between the electrons dominates their kinetic energy and the electrons form on a BCC lattice structure. The electrons oscillate, performing SHM about their lattice positions. With ne ≈ 0.5 m-3 the electrons in the IGM satisfy the energy criteria for crystallisation to occur when interacting with other electrons within a sphere far less in radius than the corresponding Debye sphere. Thus, the conditions are met for the electrons to form an “electron glass.” Since the electrons in their BCC formation are spatially coherent, light will travel through the crystals in a straight line and thus objections to “Tired Light” theories are now removed since images will neither be destroyed nor “blurred.” Charges are not created but separated, if the electrons are removed from the galaxy and sent to fill the IGM;the remaining protons are left behi

关键词： Intergalactic Medium IGM Galaxies Dark Matter Redshifts CMBR Tired Light Wigner Crystals

A Procedure for Trisecting an Acute Angle (Method 2)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Pure Mathematics 2024年第4期14卷 204-213页

作者： lyndon O. Barton Department of Math and Physics Delaware State University Dover USA

This paper presents an alternate graphical procedure (Method 2), to that presented in earlier publications entitled, “A Procedure for Trisecting an Acute Angle” and “A Key to Solving the Angle Trisection Problem”. The procedure, when applied to the 30˚ and 60˚ angles that have been “proven” to be nottrisectable and the 45˚ benchmark angle that is known to be trisectable, in each case produced a construction having an identical angular relationship with Archimedes’ Construction, as in Section 2 on THEORY of this paper, where the required trisection angle was found to be one-third of its respective angle (i.e. DE’MA = 1/3 DE’CG). For example, the trisection angle for the 30˚, 45˚ and 60˚ angles were 10.00000˚, 15.00000˚, and 20.00000˚, respectively, and Section 5 on PROOF in this paper. Therefore, based on this identical angular relationship and the numerical results (i.e. to five decimal places), which represent the highest degree of accuracy and precision attainable by The Geometer’s Sketch Pad software, one can only conclude that not only the geometric requirements for arriving at an exact trisection of the 30˚ and 60˚ angle (which have been “proven” to be not-trisectable) have been met, but also, the construction is valid for any arbitrary acute angle, despite theoretical proofs to the contrary by Wantzel, Dudley, and others.

关键词： Archimedes’ Construction College Geometry College Mathematics Angle Trisection Famous Problems in Mathematics Mechanism Analysis Geometer’s Sketch Pad

A Simplified Graphical Procedure for Constructing a 10˚or 20˚Angle

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Pure Mathematics 2023年第7期13卷 442-448页

作者： lyndon O. Barton Delaware State University Dover USA

This paper presents a simplified graphical procedure for constructing, using an unmarked straightedge and a compass only, a 10˚ to 20˚ angle, which is in other words, trisecting a 30˚ or 60˚ angle. The procedure, when applied to the 30˚ and 60˚ angles that have been “proven” to be not trisectable, produced a construction having the identical angular relationship with Archimedes’ Construction, in which the required trisection angles were found to be 10.00000˚ and 20.00000˚ respectively (i.e. exactly one-third of the given angle or ∠E’MA = 1/3∠E’CG). Based on this identical angular relationship as well as the numerical results obtained, one can only conclude that the geometric requirements for arriving at an exact trisection of the 30˚ or 60˚ angle, and therefore the construction of a 10˚ or 20˚ angle, have been met, notwithstanding the theoretical proofs of Wantzel, Dudley, and others. Thus, the solution to the age-old trisection problem, with respect to these two angles, has been accomplished.

关键词： Archimedes’ Construction College Geometry Angle Trisection Trisection of an Angle Famous Problems in Mathematics. Geometer’s Sketch Pad Mechanisms Mechanism Analysis Kinematics Trisector

A Method for the Squaring of a Circle

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Pure Mathematics 2022年第9期12卷 535-540页

作者： lyndon O. Barton Delaware State University Dover USA

This paper presents a Method for the squaring of a circle (i.e., constructing a square having an area equal to that of a given circle). The construction, when applied to a given circle having an area of 12.7 cm2, it produced a square having an area of 12.7 cm2, using only an unmarked ruler and a compass. This result was a clear demonstration that not only is the construction valid for the squaring of a circle but also for achieving absolute results (independent of the number pi (π) and in a finite number of steps) when carried out with precision.

关键词： Famous Problems in Mathematics Archimedes College Mathematics Cycloidal Construction Mean Proportional Principle Squaring the Circle Quadrature Geometer’s Sketch Pad College Geometry