3,457 research outputs found
Co-design of a differential transimpedance amplifier and balanced photodetector for a sub-pJ/bit silicon photonics receiver
No full textThis paper presents the design and implementation of a fully differential optical receiver, which is aimed for short reach intensity modulation and direct detection (IMDD) transceiver links. A Si-Ge balanced photodetector (PD) has been co-designed and packaged with a novel differential transimpedance amplifier (TIA). The TIA design is realized with a standard 28 nm CMOS process and operates with a standard digital supply (1V). Without using any equalization or DSP techniques, the proposed receiver can operate up to 54 Gb/s with a BER less than the KP4 limit (2.2×10−4) under an optical modulation amplitude (OMA) of -8.6 dBm, while the power efficiency has been optimized to 0.55 pJ/bit (0.98 pJ/bit if output buffer is included)
Book Discussion : PJ Powers
No full textThe UJ Campus Health Services and the Student Affairs Division in partnership with the UJ Library invite you to meet PJ Powers (Thandeka) the co-author of the book HERE I AM About the book: Here I Am, written with Marianne Thamm, is an intimate and hilarious account of the life and times of one of this country’s most recognisable and enduring performers. From the dizzying heights of international stardom to the dark depths of her struggle with alcohol, this is a must-read to explore the heady mix of politics and music of the time. More than just a story about the personal journey of one of South Africa’s most beloved music icons, this extraordinary memoir of PJ Powers – or Thandeka, as she was affectionately renamed by Soweto crowds – is set against the turbulent backdrop of South Africa’s recent political history. It features a gallery of political leaders and international celebrities, including the likes of Nelson Mandela, Graça Machel, Chris Hani, Joaquim Chissano, Queen Elizabeth II, Brenda Fassie, Sharon Stone and Robert De Niro. Facilitator: Prof Alban Burke, Director – PsyCad, University of Johannesburg PJ Powers will also perform a few songs on the day. Date: 27 August 2015 Time: 16:30 for 17:00 Venue: Auditorium (6th Floor), APK Library, University of Johannesburg (corner Kingsway and University Road, Auckland Park) RSVP: By Wednesday, 26 August 2015 to Theodorah Modise on [email protected] / 011 559 226
Book Discussion : PJ Powers
No full textThe UJ Campus Health Services and the Student Affairs Division in partnership with the UJ Library invite you to meet PJ Powers (Thandeka) the co-author of the book HERE I AM About the book: Here I Am, written with Marianne Thamm, is an intimate and hilarious account of the life and times of one of this country’s most recognisable and enduring performers. From the dizzying heights of international stardom to the dark depths of her struggle with alcohol, this is a must-read to explore the heady mix of politics and music of the time. More than just a story about the personal journey of one of South Africa’s most beloved music icons, this extraordinary memoir of PJ Powers – or Thandeka, as she was affectionately renamed by Soweto crowds – is set against the turbulent backdrop of South Africa’s recent political history. It features a gallery of political leaders and international celebrities, including the likes of Nelson Mandela, Graça Machel, Chris Hani, Joaquim Chissano, Queen Elizabeth II, Brenda Fassie, Sharon Stone and Robert De Niro. Facilitator: Prof Alban Burke, Director – PsyCad, University of Johannesburg PJ Powers will also perform a few songs on the day. Date: 27 August 2015 Time: 16:30 for 17:00 Venue: Auditorium (6th Floor), APK Library, University of Johannesburg (corner Kingsway and University Road, Auckland Park) RSVP: By Wednesday, 26 August 2015 to Theodorah Modise on [email protected] / 011 559 226
Building an Alliance: A new future for academic dentistry 'Down Under'?
No full textA leap of faith took Peter Thomson from years of service in the NHS to an Oral Health Alliance ‘down under’. Here, he talks about oral health and the organisation of dental services in Australia, as well as the drivers of change in academic dentistry that led to the formation of the Alliance between the University and a large public healthcare provider to deliver excellence in teaching, research and clinical practice
Thermochronologic evidence for orogen-parallel variability in wedge kinematics during extending convergent orogenesis of the northern Apennines, Italy
No full textAnalysis of 146 new apatite (U-Th)/He ages, six new apatite fi ssion-track ages, and 165 previously published apatite fission track (AFT) ages from the northern Apennine extending convergent orogen reveals a signifi cant along-strike change in post-late Miocene wedge kinematics and exhumation history. East of ~11°30 E, age patterns and age-elevation relationships are diagnostic of ongoing frontal accretion and slab retreat consistent with a northeastward-migrating “orogenic wave.” Enhanced erosion rates of ~1 mm/yr over a period of ~3–5 Ma are recorded on the contractional pro-side of the orogen and ~0.3 mm/yr on the extending retro-side. West of ~11°30 E, ongoing exhumation has been restricted to the range core since at least ca. 8 Ma at rates of ~0.4 mm/yr increasing to ~1 mm/yr in the Pliocene (ca. 3 Ma) accompanied by post-Pliocene tilting and associated faulting. This pattern can be attributed to either continued convergence (but a switch in the transfer of material into the wedge to a regime dominated by underplating or out-of-sequence shortening), or a slowdown or cessation of frontal accretion and slab retreat with enhanced Pliocene uplift and erosion triggered by a deeper seated process such as lithospheric delamination, complete slab detachment, or slab tear. These fi ndings emphasize that no single model of wedge kinematics is likely appropriate to explain long-term northern Apennine orogenesis and synconvergent extension, but rather that different lithospheric geodynamic processes have acted at different times in different lateral segments of the orogen
Radiocarbon age profiles and size dependency of mixing in northeast Atlantic sediments
No full textIn recent years, the most common technique for radiocarbon dating of deep-ocean sediments has been accelerator mass spectrometry (AMS) analysis of hand-picked planktonic foraminifera (forams). Some studies have exposed age offsets between different sediment size fractions from the same depth within a core and this has important implications when establishing a chronological framework for palaeoceanographic records associated with a particular sediment component.The mechanisms generating the age offsets are not fully understood, a problem compounded by the fact that the fraction defined as “large” varies between different studies. To explore this problem, we dated samples of hand-picked forams from two Biogeochemical Ocean Flux Study (BOFS) cores, for which the presence of an offset between the bulk carbonate and>150 µm foraminiferal calcite had already been demonstrated. The presence of a constant age offset between bulk carbonate and coarse fraction material at the two BOFS sites has been confirmed, but the magnitude of the offset is dependent on whether a simple size-separation technique or hand-picking of well-preserved forams is applied. This may be explained if the selection of well preserved forams biases the sample towards those specimens that have spent least time in the surface mixed layer (SML) or have undergone less size selective mixing. Modeling of the 14C profiles demonstrates that SML depth and sediment accumulation rates are the same for both the bulk and coarse sediment fractions, which is consistent with the hypothesis that size-selective mixing is responsible for the age offset
Technologically mediated learning: The future of training in Australia
No full textHosie, PJ ORCiD: 0000-0003-2585-024XFollowing a review of the economic imperatives currently facing Australia,
the future directions training will take are examined. Related training issues are considered; such as multiskilling, on-the-job training and legal issues. The author predicts that technologically mediated learning (TML),
especially interactive multimedia, will gain ascendancy as the predominant mode of delivery for training
A 0.7-V 0.43-pJ/cycle Wakeup Timer based on a Bang-bang Digital-Intensive frequency-Locked-Loop for IoT Applications
No full textA 40-nm CMOS wakeup timer employing a bang-bang digital-intensive frequency-locked loop for Internet-of-Things applications is presented. A self-biased ΣΔ digitally controlled oscillator (DCO) is locked to an RC time constant via a single-bit chopped comparator and a digital loop filter. Such highly digitized architecture fully exploits the advantages of advanced CMOS processes, thus enabling operation down to 0.7 V and a small area (0.07 mm 2 ). Most circuitry operates at 32× lower frequency than the DCO in order to reduce the total power consumption down to 181 nW. High frequency accuracy and a 10× enhancement of long-term stability is achieved by the adoption of chopping to reduce the effect of comparator offset and 1/f noise and by the use of ΣΔ modulation to improve the DCO resolution. The proposed timer achieves the best energy efficiency (0.43 pJ/cycle at 417 kHz) over prior art while keeping excellent on-par long-term stability (Allan deviation floor <;20 ppm) and temperature stability (106 ppm/°C).Accepted Author Manuscript(OLD)Applied Quantum Architecture
Comparison of Langmuir probe and laser Thomson scattering for plasma density and electron temperature measurements in HiPIMS plasma
No full text© 2019 Author(s). The temporal evolution of plasma density and electron temperature in high power impulse magnetron sputtering discharges has been measured using the Langmuir probe and laser Thomson scattering techniques. Measurements were performed (nonsimultaneously) at two positions within the plasma, in the low magnetic field strength region on the discharge axis and in the high magnetic field strength region of the magnetic trap, for peak power densities of 450 W cm -2 and 900 W cm −2 , respectively. The maximum plasma densities and temperatures were 6.9 × 10 19 m −3 and 3.7 eV in the pulse-on time, and values decayed to 4.5 × 10 17 m −3 and 0.1 eV at times up to 250 μs into the afterglow. The results indicate that although intrusive, the Langmuir probe can provide a good indication of electron properties in regions of different electron magnetization in the discharge
EFEKTIVITAS PASAL 1 PERATURAN DIREKTUR JENDRAL PAJAK NOMOR PER-18/PJ/2017
No full textTahap Penelitian atau yang penulis biasa sebut dengan validasi SSP (Surat Setoran Pajak) merupakan tahap final dimana seorang wajib pajak telah melakukan kewajibannya dalam penyetoran pajak, dan dalam proses validasi itu sendiri tidak semua akan diterima oleh kantor pajak setempat karena masih akan dilakukan penelitian baik penelitian serara formil maupun materiil. Untuk mekanismenya validasi telah ditetapkan dalam Per-18/Pj/2017 Tentang Cara Penelitian Bukti Pemenuhan Kewajiban Penyetoran Pajak Penghasilan Atas Penghasilan Dari Pengalihan Hak Atas Tanah Dan/Atau Bangunan, Dan Perjanjian Pengikatan Jual Beli Atas Tanah Dan/Atau Bangunan Beserta Perubahannya. Efektifitas pasal 1 Peraturan Direktur Jendral Pajak Nomor Per-18/Pj/2017 di Kantor Pajak Pratama Kota Malang telah sesuai akan tetapi untuk pasal 1 ayat 2 masih belum dan untuk pengikatan jual beli, dan mengenai cara pembuktian bahwa wajib pajak telah memenuhi kewajiban penyetoran adalah dengan cara validasi ataupun telah di telitiKata Kunci: kewajiban, penyetoran, pemenuhan, pajak, validasiThe Research Phase or what the author commonly refers to as SSP validation (Tax Payment Deposit) is the final stage in which a taxpayer has carried out his obligations in tax payments, and in the process of validation itself not all will be accepted by the local tax office because there will still be done a research both formal and material. For the mechanism of validation, it has been stipulated in Per-18 / Pj / 2017 Regarding the Method of Research of Evidence of Fulfillment of Obligation of Income Tax on Income from Transfer of Land and / or Building Rights, and Agreement on Binding of Sale and Purchase of Land and / or Buildings and Amendments. The effectiveness of article 1 of the Regulation of the Director General of Tax Number Per-18 / Pj / 2017 in the Pratama Tax Office Malang is appropriate but for article 1 paragraph 2 it is still not yet for the binding of buying and selling, and regarding the means of proving that the taxpayer has fulfilled the payment obligation is by validation or thoroughlyKeywords: oblilgation, deposit, fulfillment, tax, validatio
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