86 research outputs found
Usnea pacificana P. Halonen (lichenized Ascomycetes) new to Eurasia
No full textDuring recent studies on the revision of the genus Usnea in Turkey, some specimens morphologically close to U. subfloridana Stirt. were found with +/- stipitate soralia (i. e. soralia produced on small tubercles) and with baeomycesic acid in the medulla. They were collected in several localities in northeast Turkey. These specimens proved to be U. pacificana, known hitherto from Oregon, Washington (USA) and British Columbia (Canada) (Halonen 2000). Morphological characters were studied on freshly collected specimens using a CARL ZEISS Stemi 2000-C dissecting microscope. Selected specimens were analyzed for secondary metabolites by high performance thin-layer chromatography (HPTLC) in accordance with Arup et al. (1993), using a CAMAG Nanomat 4 sample applicator and a CAMAG horizontal development chamber. We also sequenced ITS regions from DNA samples obtained from several Usnea species collected from Turkey, but these sequences will be discussed in a forthcoming paper.Scientific & Technological Research Council of Turkey (TUBITAK) [210T022]This research was supported by the Scientific & Technological Research Council of Turkey (TUBITAK, Project number 210T022). The first author thanks Dr Laszlo Lokos (Budapest) and Orcun Fuat Calba for their help with field studies
Welfare state preferences in Finland : the interplay between well-being, legitimacy opinions and altruism
No full textCentralisation of Public Procurement from Competitive Perspective – Central Purchasing Bodies
No full textMOLECULAR BEAM INFRARED SPECTRUM OF THE FIRST C-H STRETCHING OVERTONE REGION OF NITROMETHANE
No full textPermanent address of M. and L. Halonen: Laboratory of Physical Chemistry, P.O. Box 55 (A.I. Virtasen aukio 1). FIN-00014 University of Helsinki, Finland D.Cavagnat, L. Lespade, and C. Lapouge, Ber. Bunsenges Phys. Chem. 99, 544 (1995)Author Institution: Department of Chemistry, Princeton UniversityThe first C-H stretching overtone region of nitromethane has been measured using a bolometer detected molecular beam machine with a resonance cavity. Nitromethane is an almost free rotor with a very low torsional barrier in the ground state. The purpose of this study is to find out whether the low 6-fold barrier of the ground state will turn to a much higher 2-fold barrier in the first stretching vibrational overtone of nitromethane with 2 quanta of stretching vibrational This might happen, if the vibrational energy would stay localised in one bond long enough compared with the period of internal rotation. The spectrum of nitromethane has been measured in the wavenumber region with a resolution of 5MHz. As the rotational temperature is very low, only levels with the internal rotation quantum number m=0 and m=1 should be significantly populated. The spectrum has been assigned using ground state combination differences. Using a rigid rotor program the band center and the rotational constants have been obtained for the m=0 state. The analysis of the m=1 state is in progress
Temperature Compensation of Crystal References in NB-IoT Modems
No full textThe low-cost nature of NB-IoT modems encourages them to deploy uncompensated crystal oscillators (XOs) as frequency references. The frequency offset of an uncompensated XO, however, makes network acquisition inefficient under low network coverage. In the worst case, the bulk of an NB-IoT modem's power is consumed in network acquisition. This work demonstrates a discrete frequency synthesizer prototype that employs its phase-locked loop to compensate for the frequency offset of its reference XO. We propose an accurate crystal model and a compensation logic that are suitable for 32-bit microprocessors, commonly available in NB-IoT modems. Alternatively, when synthesized in a commercial 65-nm process in 24-bit precision, the proposed compensation logic is simulated to require a total area of 0.029 mm2 and power of 290 nW at a refresh rate of 1.4 kHz. Moreover, the XO model requires only 0.16 kB of RAM. The prototype achieves a compensation error level of down to 27 ppb (3Σ) over the temperature range from-40 to 85 °C. The dominant error sources of the prototype are discussed in detail. In addition, we show that an NB-IoT modem can use the information acquired from sequential network acquisitions to compose and update its XO model in the field. This support for field calibration removes the need for XO characterization in production and ensures the validity of the model over the NB-IoT modem's lifespan. The prototype achieves a compensation error level of down to 50 ppb (3Σ) in an emulated in-field calibration test, sufficient to ensure energy-efficient low-latency network acquisition under low network coverage.Peer reviewe
Perehdyttämisopas Ravintola Paltamon Sydämeen
No full textOpinnäytetyön tavoitteena oli tehdä ravintola Paltamon Sydämelle perehdyttämisopas. Perehdyttämisoppaan tuli olla valmiina huhtikuussa 2011, jolloin ravintolaan saapui uusia työntekijöitä. Perehdyttämisoppaan tarkoitus oli, että tuleva työntekijä omaksuu yrityksen toimintatavat ja oppii toimimaan yrityksessä hyvänä työntekijänä. Kun työntekijä perehdytetään kunnolla, tulee hän nopeammin tuottavaksi. Perehdyttämisopas tulisi jatkossa toimimaan yrityksen perehdyttämisen apuvälineenä.
Opinnäytetyö on toiminnallinen työ. Perehdyttämisopas koottiin omien kokemusten, erilaisten lähteiden ja toimeksiantajan toiveiden mukaisesti. Oppaan kokoamiseen käytettiin myös työntekijöiden suullisten haastattelujen pohjalta saatuja tietoja. Toiminnallisen opinnäytetyön tuotoksina syntyivät perehdytysoppaan lisäksi työrytmiikkakaaviot, perehdyttämisentarkistuslistat sekä perehdyttäjälle, että perehdytettävälle.
Teoriaviitekehyksessä käsitellään perehdyttämistä. Minkälaista on hyvin hoidettu perehdyttäminen, siihen liittyvää lainsäädäntöä sekä niitä asioita mitä perehdyttämissuunnitelmaan kuuluu. Teoriaviitekehyksessä käsitellään myös työnantajan vastuuta perehdyttämisessä. Teoriaviitekehys lähdettiin työstämään niin, että se tukisi mahdollisimman paljon toiminnallista osiota. Teoriaviitekehyksen rakentamiseen on käytetty lähteinä kirjoja ja Internetistä löytyviä aiheeseen liittyviä materiaaleja.The commission was to create a job orientation guide for Restaurant Paltamon Sydän. The orientation guide was due by April 2011, when many new employees were coming. The main purpose of this guide was to make employees understand and learn how to work in this restaurant. When the employee is properly trained, he/she will become a more productive employee faster. The orientation guide will be a good tool for job orientation situations in the restaurant.
This thesis is a functional work. The guide was made by collecting information from different sources found in books and the internet. One major information source was the commissioner who gave a lot of information about the company and assisted with the contents of the guide. One member of the thesis group was working there earlier, so she also knew what kind of things new employees should learn when they arrive to work for the first time. Furthermore earlier work experience helped the authors to understand what job orientation was. Additional information was also acquired by interviewing the company´s current employees. The output from this functional work is the guide which was developed, and the cleaning program as well as manager´s checklist for orientation.
The theoretical framework comprises job orientation; what job orientation is, and how it is done correctly, as well as what the orientation plan should include not to forget the law concerning orientation at the work place
Energy efficient innovative lighting and energy supply solutions in developing countries
No full textThe vast majority of the rural population in the de veloping countries is out of reach of electricity and hence has to depend on the tradi tional fuels to fulfil the daily energy needs. Providing grid electricity to the rural areas of ma ny developing countries is a very difficult task due to the geographical complexity and lack of fina ncial resources. The paper explains the use of different renewable energy sources in combination w ith efficient lighting technology as a realistic option to provide clean lighting services to develo ping countries. The application of Light Emitting Diodes and renewable energy sources has be en a sustainable solution to the basic lighting needs of rural people. The paper also pres ents a comparison of costs between available renewable energy technologies
Low-Power Wireless Transceiver with 67-nW Differential Pulse-Position Modulation Transmitter
No full textThis article presents a low-power wireless narrowband (NB) transceiver consisting of a 434-MHz NB transmitter (NBTX) and a 434-MHz NB receiver (NBRX) implemented in 0.18 μ m CMOS. The NBTX utilizes differential pulse-position modulation (DPPM) to decrease consumed energy per bit (EPB) by up to 67% compared to on-off keying (OOK). The packet error performance of DPPM with a soft-decision decoding scheme is analyzed. According to the results, the packet error ratio (PER) does not deteriorate compared to OOK except at very low signal-to-noise levels. The lowest power consumption of the NBTX is 8.3 μ W when DPPM data is transmitted continuously. Utilizing packet-mode transmission, the average power consumption is 67 nW at a data rate of 4.8 kbps. The transmitted data was received with a PER of 0.1% by a receiver placed at a 30-meter distance from the NBTX. With a higher power consumption of 2.5 μ W at the same data rate, the estimated line-of-sight (LOS) uplink range is up to 200 meters. The NBRX is a mixer-firstuncertain-IF receiver. A temperature-compensated ring oscillator (TCRO) is utilized as a local oscillator. Its measured deviation of frequency is from +0.1% to -1.2% over a temperature range from -40 to +85 °C. The NBRX utilizes Manchester encoding and the sensitivity is -87 to -82 dBm over the temperature range at a data rate of 40 kbps. The NBRX consumes 85 μ W.Peer reviewe
Printed Energy Harvesting Electrodes: Sustainable Power Solutions for Batteryless Smart Diapers
No full textPublisher Copyright: © The Author(s) 2025.Amid the rapid expansion of internet-of-things (IoT) devices, one of the most significant challenges is how to power these wireless sensor nodes adopting sustainable and environment-friendly solutions as the conventional batteries are inadequate to meet the power demands of the vast IoT ecosystem. Recent years have witnessed remarkable advancements in IoT sensor electronics, particularly in wearable biomedical devices. Innovative approaches have emerged to design energy-optimized electronic systems, opening the door to batteryless applications through energy harvesting techniques. In this study, a novel energy harvesting solution is proposed by designing sustainable energy harvesting electrodes, leveraging the capabilities of printed electronics technology. These electrodes are engineered directly on diaper back sheets to harvest green energy from urine with the ultimate goal of powering energy-efficient wearable IoT sensor nodes for batteryless smart diapers. The study encompasses a comprehensive characterization of these sustainable harvesting electrodes, involving experiments conducted within a controlled laboratory environment employing both in-jar and in-diaper deployment. The results demonstrate the great promise of continuously powering the IoT sensor nodes overnight to have batteryless smart diaper operations. This research highlights a significant stride towards addressing the power challenges of the ever-expanding IoT ecosystem.Peer reviewe
Accelerated maturity: The plague of adult media on developing children & adolescents
No full textAccelerated maturity refers to the concept of young children and adolescents experiencing pressures to leave childhood and enter adulthood sooner. Perceptions of childhood and maturation have changed slowly, but significantly, over the last five-six generations and either inspires adult content in youth media or arises from it. Nonetheless, today's youth are confronted with adult media content like never before, through
films, television programs, social media/internet, and other mediums. Adult content includes both subtle and graphic representations of sex, violence. drug use, alcohol consumption, and emotionally upselling topics such as rape, infidelity, among more
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