201,631 research outputs found
Rees, P D, NX48273
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/412660Surname: REES. Given Name(s) or Initials: P D. Military Service Number or Last Known Location: NX48273. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 39861.229370
Item: [2016.0049.44922] "Rees, P D, NX48273
On the future: prospects for humanity/ Martin Rees, with a new preface by the author.
No full textDescription based upon print version of record.Includes bibliographical references and index.A provocative and inspiring look at the future of humanity and science from world-renowned scientist and bestselling author Martin ReesHumanity has reached a critical moment. Our world is unsettled and rapidly changing, and we face existential risks over the next century. Various outcomes--good and bad--are possible. Yet our approach to the future is characterized by short-term thinking, polarizing debates, alarmist rhetoric, and pessimism. In this short, exhilarating book, renowned scientist and bestselling author Martin Rees argues that humanity's prospects depend on our taking a very different approach to planning for tomorrow.The future of humanity is bound to the future of science and hinges on how successfully we harness technological advances to address our challenges. If we are to use science to solve our problems while avoiding its dystopian risks, we must think rationally, globally, collectively, and optimistically about the long term. Advances in biotechnology, cybertechnology, robotics, and artificial intelligence--if pursued and applied wisely--could empower us to boost the developing and developed world and overcome the threats humanity faces on Earth, from climate change to nuclear war. At the same time, further advances in space science will allow humans to explore the solar system and beyond with robots and AI. But there is no "Plan B" for Earth--no viable alternative within reach if we do not care for our home planet.Rich with fascinating insights into cutting-edge science and technology, this accessible book will captivate anyone who wants to understand the critical issues that will define the future of humanity on Earth and beyond.Cover -- Contents -- Preface to the Paperback Edition -- Introduction -- 1. Deep in the Anthropocene -- 1.1. Perils and Prospects -- 1.2. Nuclear Threats -- 1.3. Eco-Threats and Tipping Points -- 1.4. Staying within Planetary Boundaries -- 1.5. Climate Change -- 1.6. Clean Energy-and a 'Plan B'? -- 2. Humanity's Future on Earth -- 2.1. Biotech -- 2.2. Cybertechnology, Robotics, and AI -- 2.3. What about Our Jobs? -- 2.4. Human-Level Intelligence? -- 2.5. Truly Existential Risks? -- 3. Humanity in a Cosmic Perspective -- 3.1. The Earth in a Cosmic Context -- 3.2. Beyond Our Solar System -- 3.3. Spaceflight-Manned and Unmanned -- 3.4. Towards a Post-Human Era? -- 3.5. Alien Intelligence? -- 4. The Limits and Future of Science -- 4.1. From the Simple to the Complex -- 4.2. Making Sense of Our Complex World -- 4.3. How Far Does Physical Reality Extend? -- 4.4. Will Science 'Hit the Buffers'? -- 4.5. What about God? -- 5. Conclusions -- 5.1. Doing Science -- 5.2. Science in Society -- 5.3. Shared Hopes and Fears.1 online resource (281 p.
Nitrogen fixation in the western English Channel (NE Atlantic Ocean)
No full textIn temperate Atlantic waters (18.8 to 20.1°C), biological nitrogen fixation has beendemonstrated by 2 independent measurements: 15N-N2 incorporation and nifH identification in theDNA and expressed messenger RNA (mRNA). At 2 stations in the western English Channel, bulkwaters were incubated with 15N-N2. At the high levels of particulate nitrogen (?11.5 ?mol N l–1),absolute fixation rates of 18.9 ± 0.01 and 20.0 nmol N l–1d–1 were determined. While a caveat mustaccompany the magnitude of the rates presented due to the limited number of data, the presence andactivity of diazotrophic organisms in these waters is of ecological significance and may affect currentattitudes to nitrogen and carbon budgets. In particular, our estimate of the rate of N fixation(0.35 mmol N m–2 d–1) is comparable to that of denitrification rates in UK shelf seas. Molecular analysisidentified a diversity of expressed nifH genes, and 21 different prokaryotic nifH transcripts wereidentified
John P. Rees' Quick Files
No full textThe Quick Files feature was discontinued and it’s files were migrated into this Project on March 11, 2022. The file URL’s will still resolve properly, and the Quick Files logs are available in the Project’s Recent Activity
Selective electrochemical extraction of REEs from NdFeB magnet waste at room temperature
No full textNdFeB magnet waste is one of the important secondary resources from which rare-earth elements (REEs) can be recovered. Herein we present an electrochemical route to selectively extract REEs from the magnet waste at room temperature. First, the magnet waste was partially leached with HCl. The partial leachate along with undissolved magnet waste was taken in the anolyte side of a two compartment reactor separated by an anion exchange membrane whereas the catholyte consisted of sodium chloride solution. The Fe(ii) present in the leachate was oxidized and precipitated as Fe(OH)3 while more than 95% of REEs were extracted into the solution. Subsequently, oxalic acid was used to selectively precipitate REEs as rare-earth oxalates. Hydrochloric acid liberated during the oxalic acid precipitation process could be directly reused in the partial leaching step. Sodium chloride was the only chemical consumed during the electrolysis. The effect of the NaCl concentration in the anolyte and catholyte on the extraction of metals was investigated. From magnet waste to rare-earth oxides, the developed recycling process is environmentally friendly and consumes only electricity, NaCl and oxalic acid.Accepted Author Manuscript(OLD) MSE-
REES MATRIX COVERS FOR TIGHT ABUNDANT SEMIGROUPS
No full text Rees matrix covers for regular semigroups were first studied by McAlister in 1984. Lawson extended McAlister's results to abundant semigroups in 1987. We consider here a semigroup whose set of regular elements forms a subsemigroup, named tight semigroups. In this paper, it is proved that an abundant semigroup is tight and locally E-solid if and only if it is an F-local isomorphic image of an abundant Rees matrix semigroup [Formula: see text] over a tight E-solid abundant semigroup T, where the entries of the sandwich matrix P of [Formula: see text] are regular elements of T. Our results enrich the result of Lawson on Rees matrix covers for a class of abundant semigroups and extend the results of McAlister on Rees matrix covers for regular semigroups. </jats:p
Numerical investigation of transient buoyant flow in a room with a displacement ventilation and chilled ceiling system
No full textThis paper presents the major findings of the PhD work of Rees, who wrote the paper and is the lead author
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