Latest News—For specific help on searching ETDEWEB, Dialog, and STN using Boolean operators, wildcards, sorting, and other advanced search features, please see their individual Help sections. For ETDEWEB information, please see its Help section. The Bluesheet on File 103: Energy Science and Technology provides specific help regarding Dialog. Dialog OnDisc® DOE Energy Science and Technology provides general information about Dialog's OnDisc. For more information regarding STN, go to STN's information about the Energy file. The Energy file is also available through STN Easy and STN on the Web.
The samples below address the following questions:
- How to find specific descriptors for special questions: the example of fermentation of agricultural wastes in biogas plants
- How to filter search results in order to focus on specific aspects: the example of socio-economic and political aspects in documents on the hydrogen society.
- How to find the main activity of a specific laboratory
- “Find a needle in the haystack” - How to take advantage of searching in the full text documents:
1. How to find specific descriptors for special questions: the example of fermentation of agricultural wastes in biogas plants
ETDEWEB:“Biogas plants” is not a descriptor in the ETDE/Energy database. We recommend starting with a search in the title field for “biogas plants.” Then, on ETDEWEB, review the first five or so bibliographic records returned to view the terms found in the subject field for each. In this example, a variety of terms are found in the subject lines that might be useful, including “biomass conversion plants,” “biomass fuels,” “biofuels,” and “biogas process.” These terms will aid the user in identifying appropriate terms or phrases to successfully search for the desired topic in the subject field and other fields.
STN:
“Biogas plants” is not a descriptor in the ETDE/Energy database. Searching with descriptors helps in many cases to find quite accurate results but, more than this, compared to a search only in the title fields, it completes your results. If you don't know the correct terminology but want to search with controlled terms and not only in the title field, we recommend to start with a search in the title for “biogas plants” (to have an accurate search result), then you can select the controlled terms field (CT) and display the most frequently assigned descriptors. You can then see very quickly which terms are the most important controlled terms for your search question and afterwards search again, but this time in the title field and in the controlled terms. You can easily see that your search result contains lots of more relevant answers than before.
=> fil energy=> s biogas plant#/ti
L1 536 BIOGAS PLANT#/TI
((BIOGAS(W)PLANT#)/TI)
=> s l1 and agricultural waste#
L2 235 L1 AND AGRICULTURAL WASTE#
=> sel l2 1- ct
E1 THROUGH E594 ASSIGNED
=> d sel e1-e20
| E1 | 172 | BIOMASS CONVERSION PLANTS/CT |
| E2 | 166 | MANURES/CT |
| E3 | 121 | METHANE/CT |
| E4 | 90 | *METHANE/CT |
| E5 | 78 | ANAEROBIC DIGESTION/CT |
| E6 | 58 | *ANAEROBIC DIGESTION/CT |
| E7 | 55 | *MANURES/CT |
| E8 | 51 | BIOREACTORS/CT |
| E9 | 50 | *PRODUCTION/CT |
| E10 | 41 | BIOGAS PROCESS/CT |
| E11 | 41 | GAS YIELDS/CT |
| E12 | 39 | BIOMASS CONVERSION PLANTS/CT |
| E13 | 37 | FARMS/CT |
| E14 | 36 | *DESIGN/CT |
| E15 | 36 | AGRICULTURAL WASTES/CT |
| E16 | 36 | FERMENTATION/CT |
| E17 | 35 | *BIOGAS PROCESS/CT |
| E18 | 30 | BIOMASS/CT |
| E19 | 30 | DESIGN/CT |
| E20 | 30 | FERTILIZERS/CT |
=> s (agricultural wastes or manures)/ct
5242 AGRICULTURAL WASTES/CT
4046 MANURES/CT
L3 8538 (AGRICULTURAL WASTES OR MANURES)/CT
=> s biogas plant#/ti or biomass conversion plants/ct
2794 BIOGAS/TI
13 BIOGASES/TI
2806 BIOGAS/TI
((BIOGAS OR BIOGASES)/TI)
122877 PLANT#/TI
536 BIOGAS PLANT#/TI
((BIOGAS(W)PLANT#)/TI)
3263 BIOMASS CONVERSION PLANTS/CT
L4 3502 BIOGAS PLANT#/TI OR BIOMASS CONVERSION PLANTS/CT
=> s l3 and l4
L5 1003 L3 AND L4
=> s l5 and py>2002
175548 PY>2002
L6 28 L5 AND PY>2002
=> d all
| L6 | ANSWER 1 OF 28 ENERGY COPYRIGHT 2005 USDOE/IEA-ETDE on STN | |
| AN | 2005(8):43592 ENERGY Full-text | |
| T1 | Evaluation of an agricultural biogas plant at Hagavik. Utvaerdering av gaardsbaserad biogasanlaeggning paa Hagavik. | |
| AU | Edstroem, Mats; Nordberg, Aake; Ringmar, Anders | |
| CS | Swedish Inst. of Agricultural and Environmental Engineering, Uppsala (Sweden) | |
| NR | JTI-KA--31 | |
| SO | 2005. 39 p. 23 refs., 21 figs., 12 tabs. Available from: http://www.jti.slu.se/publikat/rapporter/ka/RKA-31MEd.pdf; OSTI; Commercial reproduction prohibited; OSTI as DE20581973; PURL: https://www.osti.gov/servlets/purl/20581973-SMhqaT/webviewable/. ISSN: 1401-4955 | |
| DT | Report | |
| CY | Sweden | |
| LA | Swedish | |
| FA | AB | |
| AB | Hagavik is an organic farm (municipality of Malmoe in Sweden) and the grown crops at the farm are sugar-beet, wheat, tritricale and ley crop (for green manure). The farmer has erected a new farm scale biogas plant with a digester volume of 500 m3. The motives for building the plant were to produce biogas for cogeneration and digestate for supplying the farm with nutrients. Biogas substrates, harvested at the farm, are ley crop and sugar-beet tops and external substrates are solid manure from horses and organic waste from industrial bakery. Digestion of fibre-rich substrates as ley crop and straw-rich solid manure at farm scale plants is fairly untested in Sweden. The fibre has a rather big impact on the rheological properties of the substrate mixture and digester slurry and can cause problems with pumping and ineffective stirring. To achieve satisfactory function on the pumps and stirrers the fibre-rich substrates the rheological properties has to be improved. This can be done by 1) mixing the fibre-rich substrates with rather large quantities of liquids which can result in low dry mater content both in substrates an digester slurry 2) reduce the fibre size by mechanical disintegration. The Swedish Inst. of Agricultural and Environmental Engineering (JTI) has been in charge of the evaluation of the biogas plant. Evaluation of the start-up phase of the plant, regarding the technical and biological function, was accomplished in July-November 2003. During year 2004 focus has been on practical experience running the plant. The plant electricity demand has been measured. Based on those measurements the calculated electricity demand running the plant with a biogas production at 600 m3/d (3,54 MWh/d) corresponds to ca 2-3% of the energy content of the biogas. The calculated heat demand corresponds to 15 % of the biogas. At cogeneration (with assumed electrical efficiency of 34% and thermal efficiency of 55%) the net-energy production is 919 MWh/year where 44% will be electricity and the rest heat. Total investment for the plant is about 2,6 MSEK. The farmer has got a government investment subsidy of 0,6 MSEK. The price of the net-energy production has to be at least 0.40 SEK/kWh in order to balance the costs. This calculation includes the investment subsidy | |
| CC | *S09 Biomass fuels | |
| CT | METHANE; AGRICULTURAL WASTES; SUGAR BEETS; CROPS; COGENERATION; PERFORMANCE; ECONOMIC ANALYSIS; INVESTMENT; ANAEROBIC DIGESTION BT ALKANES; BEETS; BIOCONVERSION; DIGESTION; ECONOMICS; FOOD; HYDROCARBONS; MAGNOLIOPHYTA; MAGNOLIOPSIDA; ORGANIC COMPOUNDS; ORGANIC WASTES; PLANTS; POWER GENERATION; STEAM GENERATION; VEGETABLES; WASTES |
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2. How to filter search results in order to focus on specific aspects: the example of socio-economic and political aspects in documents on the hydrogen society.
Dialog:For broader searches, where only the main publications in a field are requested rather than all records, it can be useful to filter the results by use of the section categories, which represent the main topic of a publication. In the following example the descriptor “HYDROGEN-BASED ECONOMY” is chosen to express the concept of a “hydrogen society”. Some additional documents are retrieved by combining “hydrogen” expressed by the section code for the use of hydrogen as a fuel and to represent the socio-economic and political aspect, the section code used is SC 29 - ENERGY PLANNING, POLICY AND ECONOMY. The list of subject categories is available at http://www.etde.org/edb/cat&scope.pdf. It is advisable to use truncation for the section codes.
File 103:Energy SciTec 1974-2004/Dec B1c) 2004 Contains copyrighted material
*File 103: For access restrictions see Help Restrict.
--- ----- -----------
| Set | Items | Description |
| S1 | 1041 | HYDROGEN-BASED ECONOMY/DE (AUG 1976) |
| S2 | 331 | (SC=08? OR HYDROGEN(W)PRODUCTION) AND ENERGY(W)POLIC? |
| S3 | 1294 | S1 OR S2 |
| S4 | 524 | S3 AND SC=29? |
| S5 | 44 | S4/2002-2004 |
STN:For broader searches, where only the main publications in a field are requested rather than all records, it can be useful to filter the results by use of the section categories, which represent the main topic of a publication. In the following example the descriptor “HYDROGEN-BASED ECONOMY” is chosen to express the concept of a “hydrogen society”. It is shown how the thesaurus can be browsed to see the hierarchy of a thesaurus term. Some additional documents are retrieved by combining “hydrogen” expressed by the section code for the use of hydrogen as a fuel and to represent the socio-economic and political aspect, the section code used is S29 - ENERGY PLANNING, POLICY AND ECONOMY. It has to be noted, that the subject classification scheme of the Energy database has been modified in the year 2000. If you search for the new classification code, STN will search automatically for the old codes too. The list of subject categories is available at http://www.etde.org/edb/cat&scope.pdf.
=> fil energy
=> e hydrogen-based/ct
| E# | FREQUENCY | AT | TERM |
| -- | --------------- | -- | ------- |
| E1 | 2969 | 6 | HYDROGEN TRANSFER/CT |
| E2 | 225 | 5 | HYDROGEN TRITIDE/CT |
| E3 | 0 | 1 --> | HYDROGEN-BASED/CT |
| E4 | 975 | 4 | HYDROGEN-BASED ECONOMY/CT |
| E5 | 57 | 2 | HYDROGENASE/CT |
| E6 | 381 | 6 | HYDROGENASES/CT |
| E7 | 20036 | 10 | HYDROGENATION/CT |
| E8 | 454 | 55 | HYDROLASES/CT |
| E9 | 0 | 1 | HYDROLIEUEFACTION/CT |
| E10 | 17499 | 15 | HYDROLOGY/CT |
| E11 | 6282 | 12 | HYDROLYSIS/CT |
| E12 | 0 | 1 | HYDROMAGNETIC/CT |
=> e e4+all
| E1 | 975 | --> | HYDROGEN-BASED ECONOMY/CT |
| E2 | 71105 | RT | HYDROGEN/CT |
| E3 | 5422 | RT | HYDROGEN STORAGE/CT |
| E4 | 23544 | RT | INDUSTRY/CT |
********** END ********** |
|||
=> s e1
L1 975 “HYDROGEN-BASED ECONOMY”/CT
=> s (s08/cc or hydrogen(w)production) and energy(w)polic?
L2 348 (S08/CC OR HYDROGEN(W)PRODUCTION) AND ENERGY(W)POLIC?
=> s l1 or l2
L3 1244 L1 OR L2
=> s l3 and s29/cc23820 S29/CC
214194 (29?)/CC
238014 S29/CC
(S29/CC OR (29?)/CC)
L4 530 L4 AND S29/CC
=> s l4 and py>2001
277777 PY>2001
L5 53 L5 AND PY>2001
3. How to find the main activity of a specific laboratory
DIALOG:In order to get some idea about the main activity of a specific laboratory, you can start with the search of the laboratory name in the corporate source (CS)field. On DIALOG, this field is indexed word by word. This means significant components of a corporate name have to be linked with proximity operators when searching. Another result of this indexing mode is that this field is not available for ranking on Dialog.
The following example shows a search for the National Renewable Energy Laboratory of DOE in the United States. It is advisable to use only significant search terms. General ones, like “laboratory”, add little to the precision and bear the risk of non-retrieval because of possible abbreviations, like “lab.” for instance.
To get a quick overview of the main activities, one can proceed to a statistical analysis of the subject heading (SH) field. This field is easier to evaluate than the subject category code field. When using this field for searches, it has to be noted, that it is indexed in word mode as well as phrase mode. This means, it can be searched by elements linked with proximity operators (s sh=(energy(s)consumption)) or by the complete expression (s sh=advanced propulsion systems). It should be noted that the subject classification scheme of the Energy database was modified in the year 2000. It is recommended that users verify the new scheme located at http://www.etde.org/edb/reference.html. The main headings and main codes are valid for the whole database.
Another possibility is to look at the keywords and make a statistical analysis of the descriptor field (DE). Both procedures are shown in the following example, and both give about the same picture.
File 103:Energy SciTec 1974-2004/Dec B1
(c) 2004 Contains copyrighted material
*File 103: For access restrictions see Help Restrict.
| Set | Items | Description |
| ---- | ------- | ---------------- |
| S1 | 9632 | CS=NREL OR CS=(NATIONAL(W)RENEWABLE(W)ENERGY) |
| S2 | 3476 | S1/2000-2004 |
| ? rank sh s2/all cont | ||
--------------------
RANK: S2/1-3476 Field: SH= File(s): 103
(Rank fields found in 2984 records -- 126 unique terms)
| RANK | No. | Items Term |
| ------- | ----- | ---------- |
| 1 | 1403 | ENERGY CONSERVATION, CONSUMPTION, & UTILIZATIO |
| 2 | 970 | SOLAR ENERGY |
| 3 | 512 | WIND ENERGY |
| 4 | 415 | MATERIALS SCIENCE |
| 5 | 375 | ENERGY PLANNING, POLICY & ECONOMY |
| 6 | 329 | BIOMASS FUELS |
| 7 | 301 | ENGINEERING |
| 8 | 223 | ENVIRONMENTAL SCIENCES |
| 9 | 190 | ADVANCED PROPULSION SYSTEMS |
| 10 | 172 | POWER TRANSMISSION & DISTRIBUTION |
| 11 | 156 | NATURAL GAS |
| 12 | 129 | SYNTHETIC FUELS |
| 13 | 119 | HYDROGEN |
| 14 | 103 | PETROLEUM |
| 15 | 80 | GEOTHERMAL ENERGY |
| 16 | 66 | ENERGY PLANNING & POLICY |
| 17 | 52 | PHOTOVOLTAIC CONVERSION |
| 18 | 52 | SOLAR ENERGY CONVERSION |
| 19 | 44 | ENERGY STORAGE |
| 20 | 44 | WIND ENERGY ENGINEERING |
DIALOG RANK Results
--------------------
RANK: S2/1-3476 Field: /DE File(s): 103
(Rank fields found in 3458 records -- 6155 unique terms)
| RANK | No. | Items Term |
| ------- | ----- | ---------- |
| 1 | 573 | ENERGY EFFICIENCY |
| 2 | 559 | SOLAR ENERGY - PHOTOVOLTAICS |
| 3 | 532 | PV |
| 4 | 442 | WIND ENERGY |
| 5 | 433 | BUILDINGS |
| 6 | 324 | INDUSTRY |
| 7 | 301 | NATIONAL RENEWABLE ENERGY LABORATORY |
| 8 | 287 | SOLAR ENERGY |
| 9 | 273 | PERFORMANCE |
| 10 | 271 | SOLAR CELLS |
| 11 | 267 | EFFICIENCY |
| 12 | 261 | RENEWABLE ENERGY SOURCES |
| 13 | 252 | WIND TURBINES |
| 14 | 237 | TRANSPORTATION |
| 15 | 237 | WIND POWER |
| 16 | 236 | PHOTOVOLTAICS |
| 17 | 214 | RENEWABLE ENERGY |
| 18 | 203 | DESIGN |
| 19 | 196 | INDUSTRIAL ENERGY EFFICIENCY |
| 20 | 193 | ELECTRICITY |
| 21 | 169 | ALTERNATIVE FUELS |
| 22 | 153 | MANUFACTURING |
| 23 | 151 | ENERGY SOURCES |
| 24 | 148 | EQUIPMENT |
| 25 | 147 | BIOMASS |
| 26 | 142 | WIND TURBINE |
| 27 | 140 | ENERGY CONSERVATION |
| 28 | 139 | THIN FILMS |
| 29 | 133 | BESTPRACTICES |
| 30 | 132 | NREL |
| 31 | 132 | TURBINES |
| 32 | 126 | TESTING |
| 33 | 122 | PRODUCTION |
| 34 | 119 | DISTRIBUTION ENERGY RESOURCES |
| 35 | 119 | PHOTOVOLTAIC CELLS |
| 36 | 118 | NATURAL GAS |
| 37 | 118 | SILICON |
| 38 | 111 | DISTRIBUTED GENERATION |
| 39 | 110 | ECONOMICS |
| 40 | 104 | HYDROGEN |
| 41 | 103 | COST |
| 42 | 103 | DISTRIBUTED POWER |
| 43 | 103 | SOLAR EQUIPMENT |
| 44 | 101 | US DOE |
| 45 | 101 | VEHICLES |
| 46 | 97 | OFFICE OF INDUSTRIAL TECHNOLOGIES |
| 47 | 93 | ENERGY ACCOUNTING |
| 48 | 92 | DOE |
| 49 | 91 | U.S. DEPARTMENT OF ENERGY |
| 50 | 89 | ENERGY EFFICIENCY AND RENEWABLE ENERGY |
---end of results--- |
||
STN:
In order to get some idea about the main activity of a specific laboratory, you can start with the search of the laboratory name in the corporate source (CS) field. On STN, this field is string-indexed, that means that in many cases it would be a good idea to have a look at the index to see the way the institution is written. Often you will see that there are manifold ways to write the name and Institutes or laboratories of a company, so that truncation of the company name will help during searching. Be also aware of abbreviations of an institution name and search for both, the abbreviated form and the long version.
The following example shows a search for the National Renewable Energy Laboratory of DOE in the United States.
To get a quick overview of the main activities one can proceed to a statistical analysis of the classification code (CC) field. This field is easier to evaluate than the subject category code field. When using this field for searches, it has to be noted, that it is indexed in word mode as well as phrase mode. This means, it can be searched by elements linked with proximity operators (s energy(w)consumption/cc) or by the complete expression (s advanced propulsion systems/cc). It should be noted, that the subject classification scheme of the Energy database was modified in the year 2000. If you search for the new classification code, STN will search automatically for the old codes too. The classification scheme can be downloaded at http://www.etde.org/edb/reference.html.
Another possibility is to look at the keywords and make a statistical analysis of the descriptor field (DE). Both procedures are shown in the following example, and both give about the same picture.
=> e national renewable energy/cs
| E1 | 1 | NATIONAL RENEWABLE ENERGY LAB., GOLDEN, CO (UNITED STATES). NATIONAL WIND TECHNOLOGY CENTER/CS |
| E2 | 11 | NATIONAL RENEWABLE ENERGY LABORATORY, GOLDEN, CO (UNITED STATES)/CS |
| E3 | 0 --> | NATIONAL RENEWABLE ENERGY/CS |
| E4 | 1 | NATIONAL RENEWABLE ENERGY LAB GOLDEN, CO (UNITED STATES)/CS |
| E5 | 1 | NATIONAL RENEWABLE ENERGY LAB, 1617 COLE BOULEVAR, GOLDEN, COLORADO 80401 (UNITED STATES)/CS |
| E6 | 42 | NATIONAL RENEWABLE ENERGY LAB, GOLDEN, CO (UNITED STATES)/CS |
| E7 | 1 | NATIONAL RENEWABLE ENERGY LAB, GOLDEN, CO (UNITED STATES). WIND TECHNOLOGY DIVISION/CS |
| E8 | 3 | NATIONAL RENEWABLE ENERGY LAB, GOLDEN, CO (US)/CS |
| E9 | 5 | NATIONAL RENEWABLE ENERGY LAB. (NREL), GOLDEN, CO (UNITED STATES)/CS |
| E10 | 6 | NATIONAL RENEWABLE ENERGY LAB. (UNITED STATES)/CS |
| E11 | 1 | NATIONAL RENEWABLE ENERGY LAB. CENTER FOR BASIC SCIENCES, GOLDEN, CO (UNITED STATES)/CS |
| E12 | 1 | NATIONAL RENEWABLE ENERGY LAB. GOLDEN, CO (UNITED STATES)/CS |
L10 7893 NATIONAL RENEWABLE ENERGY LAB?/CS
=> e nrel/cs
| E1 | 1 | NRED/TCD, UNITED NATIONS, NEW YORK, NY/CS |
| E2 | 1 | NREK/CS |
| E3 | 293 --> | NREL/CS |
| E4 | 1 | NREL MURA INTERN FROM SOUTHERN UNIV., BATON ROUSE, LA (UNITED STATES)/CS |
| E5 | 1 | NREL NATIONAL WIND TECHNOLOGY CENTER, GOLDEN, CO (UNITED STATES). APPLIED RESEARCH DIV./CS |
| E6 | 42 | NREL PROJECT MANAGER/CS |
| E7 | 1 | NREL PV PROGRAM, GOLDEN, CO (UNITED STATES)/CS |
| E8 | 1 | NREL'S PV MARKETS AND APPLICATION TEAM, GOLDEN, CO (UNITED STATES)/CS |
| E9 | 1 | NREL, (UNITED STATES)/CS |
| E10 | 1 | NREL, 1617 COLE BLVD., GOLDEN (UNITED STATES)/CS |
| E11 | 1 | NREL, 1617 COLE BLVD., GOLDEN, COLORADO (UNITED STATES)/CS |
| E12 | 2 | NREL, 1617 COLE BLVD., GOLDEN, COLORADO 80401 (UNITED STATES)/CS |
=> s nrel/cs
L11 293 NREL/CS
=> s l10 or l11
L12 7949 L10 OR L11
=> s l12 and py>1999
500824 PY>1999
L13 2265 L12 AND PY>1999
=> sel l13 1- cc
E1 THROUGH E29 ASSIGNED
=> d sel e1-
| E1 | 993 | S32 ENERGY CONSERVATION, CONSUMPTION AND UTILIZATION/CC |
| E2 | 805 | S14 SOLAR ENERGY/CC |
| E3 | 382 | S17 WIND ENERGY/CC |
| E4 | 371 | S29 ENERGY PLANNING, POLICY AND ECONOMY/CC |
| E5 | 342 | S36 MATERIALS SCIENCE/CC |
| E6 | 220 | S09 BIOMASS FUELS/CC |
| E7 | 200 | S42 ENGINEERING/CC |
| E8 | 189 | S33 ADVANCED PROPULSION SYSTEMS/CC |
| E9 | 153 | S54 ENVIRONMENTAL SCIENCES/CC |
| E10 | 121 | S03 NATURAL GAS/CC |
| E11 | 118 | S24 POWER TRANSMISSION AND DISTRIBUTION/CC |
| E12 | 102 | S08 HYDROGEN/CC |
| E13 | 94 | S10 SYNTHETIC FUELS/CC |
| E14 | 68 | S02 PETROLEUM/CC |
| E15 | 59 | S15 GEOTHERMAL ENERGY/CC |
| E16 | 45 | S25 ENERGY STORAGE/CC |
| E17 | 43 | S30 DIRECT ENERGY CONVERSION/CC |
| E18 | 33 | S99 GENERAL AND MISCELLANEOUS/CC |
| E19 | 29 | S75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY/CC |
| E20 | 20 | S37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY/CC |
| E21 | 16 | S13 HYDRO ENERGY/CC |
| E22 | 16 | S47 OTHER INSTRUMENTATION/CC |
| E23 | 9 | S01 COAL, LIGNITE, AND PEAT/CC |
| E24 | 5 | S20 FOSSIL-FUELED POWER PLANTS/CC |
| E25 | 5 | S43 PARTICLE ACCELERATORS/CC |
| E26 | 4 | S12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES/CC |
| E27 | 2 | S11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS/CC |
| E28 | 2 | S71 CLASSICAL AND QUANTUM MECHANICS, GENERAL, PHYSICS/CC |
| E29 | 1 | S16 TIDAL AND WAVE POWER/CC |
=> del sel
DELETE ALL E# DEFINITIONS? (Y)/N:y
=> sel l13 1- ct
E# OR SYSTEM LIMIT REACHED WHILE PROCESSING ANSWER 618
E1 THROUGH E999 ASSIGNED
=> d sel e1-e25
| E1 | 140 | ENERGY EFFICIENCY/CT |
| E2 | 119 | WIND POWER/CT |
| E3 | 111 | PERFORMANCE/CT |
| E4 | 88 | WIND TURBINES/CT |
| E5 | 76 | SOLAR ENERGY/CT |
| E6 | 75 | DESIGN/CT |
| E7 | 56 | ELECTRICITY/CT |
| E8 | 53 | NATIONAL RENEWABLE ENERGY LABORATORY/CT |
| E9 | 52 | ECONOMICS/CT |
| E10 | 52 | INDUSTRY/CT |
| E11 | 50 | RENEWABLE ENERGY SOURCES/CT |
| E12 | 46 | EFFICIENCY/CT |
| E13 | 44 | PRODUCTION/CT |
| E14 | 43 | SOLAR CELLS/CT |
| E15 | 42 | EVALUATION/CT |
| E16 | 38 | SYNTHETIC FUELS/CT |
| E17 | 38 | TURBINES/CT |
| E18 | 37 | BUILDINGS/CT |
| E19 | 34 | MANUFACTURING/CT |
| E20 | 32 | SILICON/CT |
| E21 | 31 | BUSINESS/CT |
| E22 | 29 | TESTING/CT |
| E23 | 27 | BIOMASS/CT |
| E24 | 27 | HYDROGEN/CT |
| E25 | 26 | SILICON SOLAR CELLS/CT |
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4. “Find a needle in the haystack”
4a. How to take advantage of searching in the full text documents: the example of information about a specific project being found within a full text document.
ETDEWEB
Suppose a user has limited information about a particular project, called the “PRUDENCE Project” that took place at the Swedish Meteorological and Hydrological Institute (SMHI). Perhaps the user wishes to find out more information about their study of simulations of climatic change.
The user may start searching for “climate change” and “simulation” in the bibliographic info field which returns over 700 results - too many results to wade through. A more refined search phrase of “PRUDENCE Project” in the bibliographic info returns no matches. If the user tries to just search for “prudence,” he gets 146 matches, all of which are not relevant. If the user searches for “PRUDENCE Project” in the full text, one record is returned that provides a full text document containing details found from the PRUDENCE Project. The user can open the full text PDF document and search it to find the occurrence of “PRUDENCE” within the report.
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4b. How to take advantage of searching in the full text documents: the example of information about a specific project when the project name has been changed and stated only within the full text document.
ETDEWEBSuppose a user has limited information about a particular carbon sequestration project, once called the “Northern Rockies and Great Plains Partnership.” Perhaps the user wishes to find out more information about the project but is unaware that the project name has been changed to the “Big Sky Partnership.”
The user may start searching for the general subject of “carbon sequestration” in the bibliographic info which returns over 600 matches. A search for “Northern Rockies” and “sequestration” in the bibliographic info field reveals no results. The same search of the full text returns 4 results with the “Big Sky Partnership” appearing in the title. The user can open the full text PDF document of the first record and search it to find the occurrence of “Great Plains” within the report which retrieves a sentence in the introduction about the project name change.
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